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28b665f6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6732ae5c JCPV |
2 | /* |
3 | * at91 pinctrl driver based on at91 pinmux core | |
4 | * | |
5 | * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | |
6732ae5c JCPV |
6 | */ |
7 | ||
8 | #include <linux/clk.h> | |
9 | #include <linux/err.h> | |
10 | #include <linux/init.h> | |
6732ae5c JCPV |
11 | #include <linux/of.h> |
12 | #include <linux/of_device.h> | |
13 | #include <linux/of_address.h> | |
14 | #include <linux/of_irq.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/interrupt.h> | |
6732ae5c | 17 | #include <linux/io.h> |
1c5fb66a | 18 | #include <linux/gpio/driver.h> |
6732ae5c JCPV |
19 | #include <linux/pinctrl/machine.h> |
20 | #include <linux/pinctrl/pinconf.h> | |
21 | #include <linux/pinctrl/pinctrl.h> | |
22 | #include <linux/pinctrl/pinmux.h> | |
23 | /* Since we request GPIOs from ourself */ | |
24 | #include <linux/pinctrl/consumer.h> | |
25 | ||
c654b6bf | 26 | #include "pinctrl-at91.h" |
6732ae5c JCPV |
27 | #include "core.h" |
28 | ||
94daf85e | 29 | #define MAX_GPIO_BANKS 5 |
6732ae5c JCPV |
30 | #define MAX_NB_GPIO_PER_BANK 32 |
31 | ||
32 | struct at91_pinctrl_mux_ops; | |
33 | ||
34 | struct at91_gpio_chip { | |
35 | struct gpio_chip chip; | |
36 | struct pinctrl_gpio_range range; | |
37 | struct at91_gpio_chip *next; /* Bank sharing same clock */ | |
38 | int pioc_hwirq; /* PIO bank interrupt identifier on AIC */ | |
39 | int pioc_virq; /* PIO bank Linux virtual interrupt */ | |
40 | int pioc_idx; /* PIO bank index */ | |
41 | void __iomem *regbase; /* PIO bank virtual address */ | |
42 | struct clk *clock; /* associated clock */ | |
6732ae5c JCPV |
43 | struct at91_pinctrl_mux_ops *ops; /* ops */ |
44 | }; | |
45 | ||
6732ae5c JCPV |
46 | static struct at91_gpio_chip *gpio_chips[MAX_GPIO_BANKS]; |
47 | ||
48 | static int gpio_banks; | |
49 | ||
525fae21 | 50 | #define PULL_UP (1 << 0) |
6732ae5c | 51 | #define MULTI_DRIVE (1 << 1) |
7ebd7a3a JCPV |
52 | #define DEGLITCH (1 << 2) |
53 | #define PULL_DOWN (1 << 3) | |
54 | #define DIS_SCHMIT (1 << 4) | |
4334ac2d MR |
55 | #define DRIVE_STRENGTH_SHIFT 5 |
56 | #define DRIVE_STRENGTH_MASK 0x3 | |
57 | #define DRIVE_STRENGTH (DRIVE_STRENGTH_MASK << DRIVE_STRENGTH_SHIFT) | |
96bb12de BB |
58 | #define OUTPUT (1 << 7) |
59 | #define OUTPUT_VAL_SHIFT 8 | |
60 | #define OUTPUT_VAL (0x1 << OUTPUT_VAL_SHIFT) | |
64e21add CB |
61 | #define SLEWRATE_SHIFT 9 |
62 | #define SLEWRATE_MASK 0x1 | |
63 | #define SLEWRATE (SLEWRATE_MASK << SLEWRATE_SHIFT) | |
7ebd7a3a JCPV |
64 | #define DEBOUNCE (1 << 16) |
65 | #define DEBOUNCE_VAL_SHIFT 17 | |
66 | #define DEBOUNCE_VAL (0x3fff << DEBOUNCE_VAL_SHIFT) | |
6732ae5c | 67 | |
aa78655d | 68 | /* |
4334ac2d MR |
69 | * These defines will translated the dt binding settings to our internal |
70 | * settings. They are not necessarily the same value as the register setting. | |
71 | * The actual drive strength current of low, medium and high must be looked up | |
72 | * from the corresponding device datasheet. This value is different for pins | |
73 | * that are even in the same banks. It is also dependent on VCC. | |
74 | * DRIVE_STRENGTH_DEFAULT is just a placeholder to avoid changing the drive | |
75 | * strength when there is no dt config for it. | |
76 | */ | |
b67328e1 CB |
77 | enum drive_strength_bit { |
78 | DRIVE_STRENGTH_BIT_DEF, | |
79 | DRIVE_STRENGTH_BIT_LOW, | |
80 | DRIVE_STRENGTH_BIT_MED, | |
81 | DRIVE_STRENGTH_BIT_HI, | |
82 | }; | |
83 | ||
84 | #define DRIVE_STRENGTH_BIT_MSK(name) (DRIVE_STRENGTH_BIT_##name << \ | |
85 | DRIVE_STRENGTH_SHIFT) | |
4334ac2d | 86 | |
64e21add | 87 | enum slewrate_bit { |
64e21add | 88 | SLEWRATE_BIT_ENA, |
0b329285 | 89 | SLEWRATE_BIT_DIS, |
64e21add CB |
90 | }; |
91 | ||
92 | #define SLEWRATE_BIT_MSK(name) (SLEWRATE_BIT_##name << SLEWRATE_SHIFT) | |
93 | ||
6732ae5c JCPV |
94 | /** |
95 | * struct at91_pmx_func - describes AT91 pinmux functions | |
96 | * @name: the name of this specific function | |
97 | * @groups: corresponding pin groups | |
98 | * @ngroups: the number of groups | |
99 | */ | |
100 | struct at91_pmx_func { | |
101 | const char *name; | |
102 | const char **groups; | |
103 | unsigned ngroups; | |
104 | }; | |
105 | ||
106 | enum at91_mux { | |
107 | AT91_MUX_GPIO = 0, | |
108 | AT91_MUX_PERIPH_A = 1, | |
109 | AT91_MUX_PERIPH_B = 2, | |
110 | AT91_MUX_PERIPH_C = 3, | |
111 | AT91_MUX_PERIPH_D = 4, | |
112 | }; | |
113 | ||
114 | /** | |
115 | * struct at91_pmx_pin - describes an At91 pin mux | |
116 | * @bank: the bank of the pin | |
117 | * @pin: the pin number in the @bank | |
118 | * @mux: the mux mode : gpio or periph_x of the pin i.e. alternate function. | |
119 | * @conf: the configuration of the pin: PULL_UP, MULTIDRIVE etc... | |
120 | */ | |
121 | struct at91_pmx_pin { | |
122 | uint32_t bank; | |
123 | uint32_t pin; | |
124 | enum at91_mux mux; | |
125 | unsigned long conf; | |
126 | }; | |
127 | ||
128 | /** | |
129 | * struct at91_pin_group - describes an At91 pin group | |
130 | * @name: the name of this specific pin group | |
131 | * @pins_conf: the mux mode for each pin in this group. The size of this | |
132 | * array is the same as pins. | |
133 | * @pins: an array of discrete physical pins used in this group, taken | |
134 | * from the driver-local pin enumeration space | |
135 | * @npins: the number of pins in this group array, i.e. the number of | |
136 | * elements in .pins so we can iterate over that array | |
137 | */ | |
138 | struct at91_pin_group { | |
139 | const char *name; | |
140 | struct at91_pmx_pin *pins_conf; | |
141 | unsigned int *pins; | |
142 | unsigned npins; | |
143 | }; | |
144 | ||
145 | /** | |
c2eb9e7f | 146 | * struct at91_pinctrl_mux_ops - describes an AT91 mux ops group |
6732ae5c JCPV |
147 | * on new IP with support for periph C and D the way to mux in |
148 | * periph A and B has changed | |
149 | * So provide the right call back | |
150 | * if not present means the IP does not support it | |
151 | * @get_periph: return the periph mode configured | |
152 | * @mux_A_periph: mux as periph A | |
153 | * @mux_B_periph: mux as periph B | |
154 | * @mux_C_periph: mux as periph C | |
155 | * @mux_D_periph: mux as periph D | |
7ebd7a3a JCPV |
156 | * @get_deglitch: get deglitch status |
157 | * @set_deglitch: enable/disable deglitch | |
158 | * @get_debounce: get debounce status | |
159 | * @set_debounce: enable/disable debounce | |
160 | * @get_pulldown: get pulldown status | |
161 | * @set_pulldown: enable/disable pulldown | |
162 | * @get_schmitt_trig: get schmitt trigger status | |
163 | * @disable_schmitt_trig: disable schmitt trigger | |
aa78655d LJ |
164 | * @get_drivestrength: get driver strength |
165 | * @set_drivestrength: set driver strength | |
166 | * @get_slewrate: get slew rate | |
167 | * @set_slewrate: set slew rate | |
6732ae5c JCPV |
168 | * @irq_type: return irq type |
169 | */ | |
170 | struct at91_pinctrl_mux_ops { | |
171 | enum at91_mux (*get_periph)(void __iomem *pio, unsigned mask); | |
172 | void (*mux_A_periph)(void __iomem *pio, unsigned mask); | |
173 | void (*mux_B_periph)(void __iomem *pio, unsigned mask); | |
174 | void (*mux_C_periph)(void __iomem *pio, unsigned mask); | |
175 | void (*mux_D_periph)(void __iomem *pio, unsigned mask); | |
7ebd7a3a | 176 | bool (*get_deglitch)(void __iomem *pio, unsigned pin); |
77966ad7 | 177 | void (*set_deglitch)(void __iomem *pio, unsigned mask, bool is_on); |
7ebd7a3a | 178 | bool (*get_debounce)(void __iomem *pio, unsigned pin, u32 *div); |
77966ad7 | 179 | void (*set_debounce)(void __iomem *pio, unsigned mask, bool is_on, u32 div); |
7ebd7a3a | 180 | bool (*get_pulldown)(void __iomem *pio, unsigned pin); |
77966ad7 | 181 | void (*set_pulldown)(void __iomem *pio, unsigned mask, bool is_on); |
7ebd7a3a JCPV |
182 | bool (*get_schmitt_trig)(void __iomem *pio, unsigned pin); |
183 | void (*disable_schmitt_trig)(void __iomem *pio, unsigned mask); | |
4334ac2d MR |
184 | unsigned (*get_drivestrength)(void __iomem *pio, unsigned pin); |
185 | void (*set_drivestrength)(void __iomem *pio, unsigned pin, | |
186 | u32 strength); | |
64e21add CB |
187 | unsigned (*get_slewrate)(void __iomem *pio, unsigned pin); |
188 | void (*set_slewrate)(void __iomem *pio, unsigned pin, u32 slewrate); | |
6732ae5c JCPV |
189 | /* irq */ |
190 | int (*irq_type)(struct irq_data *d, unsigned type); | |
191 | }; | |
192 | ||
193 | static int gpio_irq_type(struct irq_data *d, unsigned type); | |
194 | static int alt_gpio_irq_type(struct irq_data *d, unsigned type); | |
195 | ||
196 | struct at91_pinctrl { | |
197 | struct device *dev; | |
198 | struct pinctrl_dev *pctl; | |
199 | ||
a0b957f3 | 200 | int nactive_banks; |
6732ae5c JCPV |
201 | |
202 | uint32_t *mux_mask; | |
203 | int nmux; | |
204 | ||
205 | struct at91_pmx_func *functions; | |
206 | int nfunctions; | |
207 | ||
208 | struct at91_pin_group *groups; | |
209 | int ngroups; | |
210 | ||
211 | struct at91_pinctrl_mux_ops *ops; | |
212 | }; | |
213 | ||
56411f3c | 214 | static inline const struct at91_pin_group *at91_pinctrl_find_group_by_name( |
6732ae5c JCPV |
215 | const struct at91_pinctrl *info, |
216 | const char *name) | |
217 | { | |
218 | const struct at91_pin_group *grp = NULL; | |
219 | int i; | |
220 | ||
221 | for (i = 0; i < info->ngroups; i++) { | |
222 | if (strcmp(info->groups[i].name, name)) | |
223 | continue; | |
224 | ||
225 | grp = &info->groups[i]; | |
226 | dev_dbg(info->dev, "%s: %d 0:%d\n", name, grp->npins, grp->pins[0]); | |
227 | break; | |
228 | } | |
229 | ||
230 | return grp; | |
231 | } | |
232 | ||
233 | static int at91_get_groups_count(struct pinctrl_dev *pctldev) | |
234 | { | |
235 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
236 | ||
237 | return info->ngroups; | |
238 | } | |
239 | ||
240 | static const char *at91_get_group_name(struct pinctrl_dev *pctldev, | |
241 | unsigned selector) | |
242 | { | |
243 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
244 | ||
245 | return info->groups[selector].name; | |
246 | } | |
247 | ||
248 | static int at91_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, | |
249 | const unsigned **pins, | |
250 | unsigned *npins) | |
251 | { | |
252 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
253 | ||
254 | if (selector >= info->ngroups) | |
255 | return -EINVAL; | |
256 | ||
257 | *pins = info->groups[selector].pins; | |
258 | *npins = info->groups[selector].npins; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | static void at91_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, | |
264 | unsigned offset) | |
265 | { | |
266 | seq_printf(s, "%s", dev_name(pctldev->dev)); | |
267 | } | |
268 | ||
269 | static int at91_dt_node_to_map(struct pinctrl_dev *pctldev, | |
270 | struct device_node *np, | |
271 | struct pinctrl_map **map, unsigned *num_maps) | |
272 | { | |
273 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
274 | const struct at91_pin_group *grp; | |
275 | struct pinctrl_map *new_map; | |
276 | struct device_node *parent; | |
277 | int map_num = 1; | |
278 | int i; | |
6732ae5c JCPV |
279 | |
280 | /* | |
61e310a1 | 281 | * first find the group of this node and check if we need to create |
6732ae5c JCPV |
282 | * config maps for pins |
283 | */ | |
284 | grp = at91_pinctrl_find_group_by_name(info, np->name); | |
285 | if (!grp) { | |
94f4e54c RH |
286 | dev_err(info->dev, "unable to find group for node %pOFn\n", |
287 | np); | |
6732ae5c JCPV |
288 | return -EINVAL; |
289 | } | |
290 | ||
291 | map_num += grp->npins; | |
a86854d0 KC |
292 | new_map = devm_kcalloc(pctldev->dev, map_num, sizeof(*new_map), |
293 | GFP_KERNEL); | |
6732ae5c JCPV |
294 | if (!new_map) |
295 | return -ENOMEM; | |
296 | ||
297 | *map = new_map; | |
298 | *num_maps = map_num; | |
299 | ||
300 | /* create mux map */ | |
301 | parent = of_get_parent(np); | |
302 | if (!parent) { | |
c62b2b34 | 303 | devm_kfree(pctldev->dev, new_map); |
6732ae5c JCPV |
304 | return -EINVAL; |
305 | } | |
306 | new_map[0].type = PIN_MAP_TYPE_MUX_GROUP; | |
307 | new_map[0].data.mux.function = parent->name; | |
308 | new_map[0].data.mux.group = np->name; | |
309 | of_node_put(parent); | |
310 | ||
311 | /* create config map */ | |
312 | new_map++; | |
313 | for (i = 0; i < grp->npins; i++) { | |
6732ae5c JCPV |
314 | new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN; |
315 | new_map[i].data.configs.group_or_pin = | |
316 | pin_get_name(pctldev, grp->pins[i]); | |
317 | new_map[i].data.configs.configs = &grp->pins_conf[i].conf; | |
318 | new_map[i].data.configs.num_configs = 1; | |
319 | } | |
320 | ||
321 | dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n", | |
322 | (*map)->data.mux.function, (*map)->data.mux.group, map_num); | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | static void at91_dt_free_map(struct pinctrl_dev *pctldev, | |
328 | struct pinctrl_map *map, unsigned num_maps) | |
329 | { | |
330 | } | |
331 | ||
022ab148 | 332 | static const struct pinctrl_ops at91_pctrl_ops = { |
6732ae5c JCPV |
333 | .get_groups_count = at91_get_groups_count, |
334 | .get_group_name = at91_get_group_name, | |
335 | .get_group_pins = at91_get_group_pins, | |
336 | .pin_dbg_show = at91_pin_dbg_show, | |
337 | .dt_node_to_map = at91_dt_node_to_map, | |
338 | .dt_free_map = at91_dt_free_map, | |
339 | }; | |
340 | ||
3c93600d | 341 | static void __iomem *pin_to_controller(struct at91_pinctrl *info, |
6732ae5c JCPV |
342 | unsigned int bank) |
343 | { | |
1ab36387 DD |
344 | if (!gpio_chips[bank]) |
345 | return NULL; | |
346 | ||
6732ae5c JCPV |
347 | return gpio_chips[bank]->regbase; |
348 | } | |
349 | ||
350 | static inline int pin_to_bank(unsigned pin) | |
351 | { | |
352 | return pin /= MAX_NB_GPIO_PER_BANK; | |
353 | } | |
354 | ||
355 | static unsigned pin_to_mask(unsigned int pin) | |
356 | { | |
357 | return 1 << pin; | |
358 | } | |
359 | ||
4334ac2d MR |
360 | static unsigned two_bit_pin_value_shift_amount(unsigned int pin) |
361 | { | |
362 | /* return the shift value for a pin for "two bit" per pin registers, | |
363 | * i.e. drive strength */ | |
364 | return 2*((pin >= MAX_NB_GPIO_PER_BANK/2) | |
365 | ? pin - MAX_NB_GPIO_PER_BANK/2 : pin); | |
366 | } | |
367 | ||
368 | static unsigned sama5d3_get_drive_register(unsigned int pin) | |
369 | { | |
370 | /* drive strength is split between two registers | |
371 | * with two bits per pin */ | |
372 | return (pin >= MAX_NB_GPIO_PER_BANK/2) | |
373 | ? SAMA5D3_PIO_DRIVER2 : SAMA5D3_PIO_DRIVER1; | |
374 | } | |
375 | ||
376 | static unsigned at91sam9x5_get_drive_register(unsigned int pin) | |
377 | { | |
378 | /* drive strength is split between two registers | |
379 | * with two bits per pin */ | |
380 | return (pin >= MAX_NB_GPIO_PER_BANK/2) | |
381 | ? AT91SAM9X5_PIO_DRIVER2 : AT91SAM9X5_PIO_DRIVER1; | |
382 | } | |
383 | ||
6732ae5c JCPV |
384 | static void at91_mux_disable_interrupt(void __iomem *pio, unsigned mask) |
385 | { | |
386 | writel_relaxed(mask, pio + PIO_IDR); | |
387 | } | |
388 | ||
389 | static unsigned at91_mux_get_pullup(void __iomem *pio, unsigned pin) | |
390 | { | |
05d3534a | 391 | return !((readl_relaxed(pio + PIO_PUSR) >> pin) & 0x1); |
6732ae5c JCPV |
392 | } |
393 | ||
394 | static void at91_mux_set_pullup(void __iomem *pio, unsigned mask, bool on) | |
395 | { | |
3d784273 WY |
396 | if (on) |
397 | writel_relaxed(mask, pio + PIO_PPDDR); | |
398 | ||
6732ae5c JCPV |
399 | writel_relaxed(mask, pio + (on ? PIO_PUER : PIO_PUDR)); |
400 | } | |
401 | ||
96bb12de BB |
402 | static bool at91_mux_get_output(void __iomem *pio, unsigned int pin, bool *val) |
403 | { | |
404 | *val = (readl_relaxed(pio + PIO_ODSR) >> pin) & 0x1; | |
405 | return (readl_relaxed(pio + PIO_OSR) >> pin) & 0x1; | |
406 | } | |
407 | ||
408 | static void at91_mux_set_output(void __iomem *pio, unsigned int mask, | |
409 | bool is_on, bool val) | |
410 | { | |
411 | writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); | |
412 | writel_relaxed(mask, pio + (is_on ? PIO_OER : PIO_ODR)); | |
413 | } | |
414 | ||
6732ae5c JCPV |
415 | static unsigned at91_mux_get_multidrive(void __iomem *pio, unsigned pin) |
416 | { | |
417 | return (readl_relaxed(pio + PIO_MDSR) >> pin) & 0x1; | |
418 | } | |
419 | ||
420 | static void at91_mux_set_multidrive(void __iomem *pio, unsigned mask, bool on) | |
421 | { | |
422 | writel_relaxed(mask, pio + (on ? PIO_MDER : PIO_MDDR)); | |
423 | } | |
424 | ||
425 | static void at91_mux_set_A_periph(void __iomem *pio, unsigned mask) | |
426 | { | |
427 | writel_relaxed(mask, pio + PIO_ASR); | |
428 | } | |
429 | ||
430 | static void at91_mux_set_B_periph(void __iomem *pio, unsigned mask) | |
431 | { | |
432 | writel_relaxed(mask, pio + PIO_BSR); | |
433 | } | |
434 | ||
435 | static void at91_mux_pio3_set_A_periph(void __iomem *pio, unsigned mask) | |
436 | { | |
437 | ||
438 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, | |
439 | pio + PIO_ABCDSR1); | |
440 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask, | |
441 | pio + PIO_ABCDSR2); | |
442 | } | |
443 | ||
444 | static void at91_mux_pio3_set_B_periph(void __iomem *pio, unsigned mask) | |
445 | { | |
446 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, | |
447 | pio + PIO_ABCDSR1); | |
448 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask, | |
449 | pio + PIO_ABCDSR2); | |
450 | } | |
451 | ||
452 | static void at91_mux_pio3_set_C_periph(void __iomem *pio, unsigned mask) | |
453 | { | |
454 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, pio + PIO_ABCDSR1); | |
455 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2); | |
456 | } | |
457 | ||
458 | static void at91_mux_pio3_set_D_periph(void __iomem *pio, unsigned mask) | |
459 | { | |
460 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, pio + PIO_ABCDSR1); | |
461 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2); | |
462 | } | |
463 | ||
464 | static enum at91_mux at91_mux_pio3_get_periph(void __iomem *pio, unsigned mask) | |
465 | { | |
466 | unsigned select; | |
467 | ||
468 | if (readl_relaxed(pio + PIO_PSR) & mask) | |
469 | return AT91_MUX_GPIO; | |
470 | ||
471 | select = !!(readl_relaxed(pio + PIO_ABCDSR1) & mask); | |
472 | select |= (!!(readl_relaxed(pio + PIO_ABCDSR2) & mask) << 1); | |
473 | ||
474 | return select + 1; | |
475 | } | |
476 | ||
477 | static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask) | |
478 | { | |
479 | unsigned select; | |
480 | ||
481 | if (readl_relaxed(pio + PIO_PSR) & mask) | |
482 | return AT91_MUX_GPIO; | |
483 | ||
484 | select = readl_relaxed(pio + PIO_ABSR) & mask; | |
485 | ||
486 | return select + 1; | |
487 | } | |
488 | ||
7ebd7a3a JCPV |
489 | static bool at91_mux_get_deglitch(void __iomem *pio, unsigned pin) |
490 | { | |
d480239b | 491 | return (readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1; |
7ebd7a3a JCPV |
492 | } |
493 | ||
494 | static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on) | |
495 | { | |
d480239b | 496 | writel_relaxed(mask, pio + (is_on ? PIO_IFER : PIO_IFDR)); |
7ebd7a3a JCPV |
497 | } |
498 | ||
c8dba02e BB |
499 | static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin) |
500 | { | |
d480239b BD |
501 | if ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) |
502 | return !((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1); | |
c8dba02e BB |
503 | |
504 | return false; | |
505 | } | |
506 | ||
7ebd7a3a JCPV |
507 | static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on) |
508 | { | |
509 | if (is_on) | |
d480239b | 510 | writel_relaxed(mask, pio + PIO_IFSCDR); |
7ebd7a3a JCPV |
511 | at91_mux_set_deglitch(pio, mask, is_on); |
512 | } | |
513 | ||
514 | static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div) | |
515 | { | |
d480239b | 516 | *div = readl_relaxed(pio + PIO_SCDR); |
7ebd7a3a | 517 | |
d480239b BD |
518 | return ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) && |
519 | ((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1); | |
7ebd7a3a JCPV |
520 | } |
521 | ||
522 | static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask, | |
523 | bool is_on, u32 div) | |
524 | { | |
525 | if (is_on) { | |
d480239b BD |
526 | writel_relaxed(mask, pio + PIO_IFSCER); |
527 | writel_relaxed(div & PIO_SCDR_DIV, pio + PIO_SCDR); | |
528 | writel_relaxed(mask, pio + PIO_IFER); | |
c8dba02e | 529 | } else |
d480239b | 530 | writel_relaxed(mask, pio + PIO_IFSCDR); |
7ebd7a3a JCPV |
531 | } |
532 | ||
533 | static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin) | |
534 | { | |
d480239b | 535 | return !((readl_relaxed(pio + PIO_PPDSR) >> pin) & 0x1); |
7ebd7a3a JCPV |
536 | } |
537 | ||
538 | static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on) | |
539 | { | |
3d784273 | 540 | if (is_on) |
d480239b | 541 | writel_relaxed(mask, pio + PIO_PUDR); |
3d784273 | 542 | |
d480239b | 543 | writel_relaxed(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR)); |
7ebd7a3a JCPV |
544 | } |
545 | ||
546 | static void at91_mux_pio3_disable_schmitt_trig(void __iomem *pio, unsigned mask) | |
547 | { | |
d480239b | 548 | writel_relaxed(readl_relaxed(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT); |
7ebd7a3a JCPV |
549 | } |
550 | ||
551 | static bool at91_mux_pio3_get_schmitt_trig(void __iomem *pio, unsigned pin) | |
552 | { | |
d480239b | 553 | return (readl_relaxed(pio + PIO_SCHMITT) >> pin) & 0x1; |
7ebd7a3a JCPV |
554 | } |
555 | ||
4334ac2d MR |
556 | static inline u32 read_drive_strength(void __iomem *reg, unsigned pin) |
557 | { | |
d480239b | 558 | unsigned tmp = readl_relaxed(reg); |
4334ac2d MR |
559 | |
560 | tmp = tmp >> two_bit_pin_value_shift_amount(pin); | |
561 | ||
562 | return tmp & DRIVE_STRENGTH_MASK; | |
563 | } | |
564 | ||
565 | static unsigned at91_mux_sama5d3_get_drivestrength(void __iomem *pio, | |
566 | unsigned pin) | |
567 | { | |
568 | unsigned tmp = read_drive_strength(pio + | |
569 | sama5d3_get_drive_register(pin), pin); | |
570 | ||
571 | /* SAMA5 strength is 1:1 with our defines, | |
572 | * except 0 is equivalent to low per datasheet */ | |
573 | if (!tmp) | |
b67328e1 | 574 | tmp = DRIVE_STRENGTH_BIT_MSK(LOW); |
4334ac2d MR |
575 | |
576 | return tmp; | |
577 | } | |
578 | ||
579 | static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio, | |
580 | unsigned pin) | |
581 | { | |
582 | unsigned tmp = read_drive_strength(pio + | |
583 | at91sam9x5_get_drive_register(pin), pin); | |
584 | ||
585 | /* strength is inverse in SAM9x5s hardware with the pinctrl defines | |
586 | * hardware: 0 = hi, 1 = med, 2 = low, 3 = rsvd */ | |
b67328e1 | 587 | tmp = DRIVE_STRENGTH_BIT_MSK(HI) - tmp; |
4334ac2d MR |
588 | |
589 | return tmp; | |
590 | } | |
591 | ||
42ef7557 CB |
592 | static unsigned at91_mux_sam9x60_get_drivestrength(void __iomem *pio, |
593 | unsigned pin) | |
594 | { | |
595 | unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1); | |
596 | ||
597 | if (tmp & BIT(pin)) | |
598 | return DRIVE_STRENGTH_BIT_HI; | |
599 | ||
600 | return DRIVE_STRENGTH_BIT_LOW; | |
601 | } | |
602 | ||
64e21add CB |
603 | static unsigned at91_mux_sam9x60_get_slewrate(void __iomem *pio, unsigned pin) |
604 | { | |
605 | unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR); | |
606 | ||
607 | if ((tmp & BIT(pin))) | |
608 | return SLEWRATE_BIT_ENA; | |
609 | ||
610 | return SLEWRATE_BIT_DIS; | |
611 | } | |
612 | ||
4334ac2d MR |
613 | static void set_drive_strength(void __iomem *reg, unsigned pin, u32 strength) |
614 | { | |
d480239b | 615 | unsigned tmp = readl_relaxed(reg); |
4334ac2d MR |
616 | unsigned shift = two_bit_pin_value_shift_amount(pin); |
617 | ||
618 | tmp &= ~(DRIVE_STRENGTH_MASK << shift); | |
619 | tmp |= strength << shift; | |
620 | ||
d480239b | 621 | writel_relaxed(tmp, reg); |
4334ac2d MR |
622 | } |
623 | ||
624 | static void at91_mux_sama5d3_set_drivestrength(void __iomem *pio, unsigned pin, | |
625 | u32 setting) | |
626 | { | |
627 | /* do nothing if setting is zero */ | |
628 | if (!setting) | |
629 | return; | |
630 | ||
631 | /* strength is 1 to 1 with setting for SAMA5 */ | |
632 | set_drive_strength(pio + sama5d3_get_drive_register(pin), pin, setting); | |
633 | } | |
634 | ||
635 | static void at91_mux_sam9x5_set_drivestrength(void __iomem *pio, unsigned pin, | |
636 | u32 setting) | |
637 | { | |
638 | /* do nothing if setting is zero */ | |
639 | if (!setting) | |
640 | return; | |
641 | ||
642 | /* strength is inverse on SAM9x5s with our defines | |
643 | * 0 = hi, 1 = med, 2 = low, 3 = rsvd */ | |
b67328e1 | 644 | setting = DRIVE_STRENGTH_BIT_MSK(HI) - setting; |
4334ac2d MR |
645 | |
646 | set_drive_strength(pio + at91sam9x5_get_drive_register(pin), pin, | |
647 | setting); | |
648 | } | |
649 | ||
42ef7557 CB |
650 | static void at91_mux_sam9x60_set_drivestrength(void __iomem *pio, unsigned pin, |
651 | u32 setting) | |
652 | { | |
653 | unsigned int tmp; | |
654 | ||
655 | if (setting <= DRIVE_STRENGTH_BIT_DEF || | |
656 | setting == DRIVE_STRENGTH_BIT_MED || | |
657 | setting > DRIVE_STRENGTH_BIT_HI) | |
658 | return; | |
659 | ||
660 | tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1); | |
661 | ||
662 | /* Strength is 0: low, 1: hi */ | |
663 | if (setting == DRIVE_STRENGTH_BIT_LOW) | |
664 | tmp &= ~BIT(pin); | |
665 | else | |
666 | tmp |= BIT(pin); | |
667 | ||
668 | writel_relaxed(tmp, pio + SAM9X60_PIO_DRIVER1); | |
669 | } | |
670 | ||
64e21add CB |
671 | static void at91_mux_sam9x60_set_slewrate(void __iomem *pio, unsigned pin, |
672 | u32 setting) | |
673 | { | |
674 | unsigned int tmp; | |
675 | ||
0b329285 | 676 | if (setting < SLEWRATE_BIT_ENA || setting > SLEWRATE_BIT_DIS) |
64e21add CB |
677 | return; |
678 | ||
679 | tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR); | |
680 | ||
681 | if (setting == SLEWRATE_BIT_DIS) | |
682 | tmp &= ~BIT(pin); | |
683 | else | |
684 | tmp |= BIT(pin); | |
685 | ||
686 | writel_relaxed(tmp, pio + SAM9X60_PIO_SLEWR); | |
687 | } | |
688 | ||
6732ae5c JCPV |
689 | static struct at91_pinctrl_mux_ops at91rm9200_ops = { |
690 | .get_periph = at91_mux_get_periph, | |
691 | .mux_A_periph = at91_mux_set_A_periph, | |
692 | .mux_B_periph = at91_mux_set_B_periph, | |
7ebd7a3a JCPV |
693 | .get_deglitch = at91_mux_get_deglitch, |
694 | .set_deglitch = at91_mux_set_deglitch, | |
6732ae5c JCPV |
695 | .irq_type = gpio_irq_type, |
696 | }; | |
697 | ||
698 | static struct at91_pinctrl_mux_ops at91sam9x5_ops = { | |
699 | .get_periph = at91_mux_pio3_get_periph, | |
700 | .mux_A_periph = at91_mux_pio3_set_A_periph, | |
701 | .mux_B_periph = at91_mux_pio3_set_B_periph, | |
702 | .mux_C_periph = at91_mux_pio3_set_C_periph, | |
703 | .mux_D_periph = at91_mux_pio3_set_D_periph, | |
c8dba02e | 704 | .get_deglitch = at91_mux_pio3_get_deglitch, |
7ebd7a3a JCPV |
705 | .set_deglitch = at91_mux_pio3_set_deglitch, |
706 | .get_debounce = at91_mux_pio3_get_debounce, | |
707 | .set_debounce = at91_mux_pio3_set_debounce, | |
708 | .get_pulldown = at91_mux_pio3_get_pulldown, | |
709 | .set_pulldown = at91_mux_pio3_set_pulldown, | |
710 | .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig, | |
711 | .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, | |
4334ac2d MR |
712 | .get_drivestrength = at91_mux_sam9x5_get_drivestrength, |
713 | .set_drivestrength = at91_mux_sam9x5_set_drivestrength, | |
714 | .irq_type = alt_gpio_irq_type, | |
715 | }; | |
716 | ||
42ef7557 CB |
717 | static const struct at91_pinctrl_mux_ops sam9x60_ops = { |
718 | .get_periph = at91_mux_pio3_get_periph, | |
719 | .mux_A_periph = at91_mux_pio3_set_A_periph, | |
720 | .mux_B_periph = at91_mux_pio3_set_B_periph, | |
721 | .mux_C_periph = at91_mux_pio3_set_C_periph, | |
722 | .mux_D_periph = at91_mux_pio3_set_D_periph, | |
723 | .get_deglitch = at91_mux_pio3_get_deglitch, | |
724 | .set_deglitch = at91_mux_pio3_set_deglitch, | |
725 | .get_debounce = at91_mux_pio3_get_debounce, | |
726 | .set_debounce = at91_mux_pio3_set_debounce, | |
727 | .get_pulldown = at91_mux_pio3_get_pulldown, | |
728 | .set_pulldown = at91_mux_pio3_set_pulldown, | |
729 | .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig, | |
730 | .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, | |
731 | .get_drivestrength = at91_mux_sam9x60_get_drivestrength, | |
732 | .set_drivestrength = at91_mux_sam9x60_set_drivestrength, | |
64e21add CB |
733 | .get_slewrate = at91_mux_sam9x60_get_slewrate, |
734 | .set_slewrate = at91_mux_sam9x60_set_slewrate, | |
42ef7557 CB |
735 | .irq_type = alt_gpio_irq_type, |
736 | ||
737 | }; | |
738 | ||
4334ac2d MR |
739 | static struct at91_pinctrl_mux_ops sama5d3_ops = { |
740 | .get_periph = at91_mux_pio3_get_periph, | |
741 | .mux_A_periph = at91_mux_pio3_set_A_periph, | |
742 | .mux_B_periph = at91_mux_pio3_set_B_periph, | |
743 | .mux_C_periph = at91_mux_pio3_set_C_periph, | |
744 | .mux_D_periph = at91_mux_pio3_set_D_periph, | |
745 | .get_deglitch = at91_mux_pio3_get_deglitch, | |
746 | .set_deglitch = at91_mux_pio3_set_deglitch, | |
747 | .get_debounce = at91_mux_pio3_get_debounce, | |
748 | .set_debounce = at91_mux_pio3_set_debounce, | |
749 | .get_pulldown = at91_mux_pio3_get_pulldown, | |
750 | .set_pulldown = at91_mux_pio3_set_pulldown, | |
751 | .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig, | |
752 | .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, | |
753 | .get_drivestrength = at91_mux_sama5d3_get_drivestrength, | |
754 | .set_drivestrength = at91_mux_sama5d3_set_drivestrength, | |
6732ae5c JCPV |
755 | .irq_type = alt_gpio_irq_type, |
756 | }; | |
757 | ||
758 | static void at91_pin_dbg(const struct device *dev, const struct at91_pmx_pin *pin) | |
759 | { | |
760 | if (pin->mux) { | |
4b6fe45a | 761 | dev_dbg(dev, "pio%c%d configured as periph%c with conf = 0x%lx\n", |
6732ae5c JCPV |
762 | pin->bank + 'A', pin->pin, pin->mux - 1 + 'A', pin->conf); |
763 | } else { | |
4b6fe45a | 764 | dev_dbg(dev, "pio%c%d configured as gpio with conf = 0x%lx\n", |
6732ae5c JCPV |
765 | pin->bank + 'A', pin->pin, pin->conf); |
766 | } | |
767 | } | |
768 | ||
3c93600d | 769 | static int pin_check_config(struct at91_pinctrl *info, const char *name, |
6732ae5c JCPV |
770 | int index, const struct at91_pmx_pin *pin) |
771 | { | |
772 | int mux; | |
773 | ||
774 | /* check if it's a valid config */ | |
a0b957f3 | 775 | if (pin->bank >= gpio_banks) { |
6732ae5c | 776 | dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n", |
a0b957f3 | 777 | name, index, pin->bank, gpio_banks); |
6732ae5c JCPV |
778 | return -EINVAL; |
779 | } | |
780 | ||
a0b957f3 JCPV |
781 | if (!gpio_chips[pin->bank]) { |
782 | dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n", | |
783 | name, index, pin->bank); | |
784 | return -ENXIO; | |
785 | } | |
786 | ||
6732ae5c JCPV |
787 | if (pin->pin >= MAX_NB_GPIO_PER_BANK) { |
788 | dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n", | |
789 | name, index, pin->pin, MAX_NB_GPIO_PER_BANK); | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | if (!pin->mux) | |
794 | return 0; | |
795 | ||
796 | mux = pin->mux - 1; | |
797 | ||
798 | if (mux >= info->nmux) { | |
799 | dev_err(info->dev, "%s: pin conf %d mux_id %d >= nmux %d\n", | |
800 | name, index, mux, info->nmux); | |
801 | return -EINVAL; | |
802 | } | |
803 | ||
804 | if (!(info->mux_mask[pin->bank * info->nmux + mux] & 1 << pin->pin)) { | |
805 | dev_err(info->dev, "%s: pin conf %d mux_id %d not supported for pio%c%d\n", | |
806 | name, index, mux, pin->bank + 'A', pin->pin); | |
807 | return -EINVAL; | |
808 | } | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | static void at91_mux_gpio_disable(void __iomem *pio, unsigned mask) | |
814 | { | |
815 | writel_relaxed(mask, pio + PIO_PDR); | |
816 | } | |
817 | ||
818 | static void at91_mux_gpio_enable(void __iomem *pio, unsigned mask, bool input) | |
819 | { | |
820 | writel_relaxed(mask, pio + PIO_PER); | |
821 | writel_relaxed(mask, pio + (input ? PIO_ODR : PIO_OER)); | |
822 | } | |
823 | ||
03e9f0ca LW |
824 | static int at91_pmx_set(struct pinctrl_dev *pctldev, unsigned selector, |
825 | unsigned group) | |
6732ae5c JCPV |
826 | { |
827 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
828 | const struct at91_pmx_pin *pins_conf = info->groups[group].pins_conf; | |
829 | const struct at91_pmx_pin *pin; | |
830 | uint32_t npins = info->groups[group].npins; | |
831 | int i, ret; | |
832 | unsigned mask; | |
833 | void __iomem *pio; | |
834 | ||
835 | dev_dbg(info->dev, "enable function %s group %s\n", | |
836 | info->functions[selector].name, info->groups[group].name); | |
837 | ||
838 | /* first check that all the pins of the group are valid with a valid | |
61e310a1 | 839 | * parameter */ |
6732ae5c JCPV |
840 | for (i = 0; i < npins; i++) { |
841 | pin = &pins_conf[i]; | |
842 | ret = pin_check_config(info, info->groups[group].name, i, pin); | |
843 | if (ret) | |
844 | return ret; | |
845 | } | |
846 | ||
847 | for (i = 0; i < npins; i++) { | |
848 | pin = &pins_conf[i]; | |
849 | at91_pin_dbg(info->dev, pin); | |
850 | pio = pin_to_controller(info, pin->bank); | |
1ab36387 DD |
851 | |
852 | if (!pio) | |
853 | continue; | |
854 | ||
6732ae5c JCPV |
855 | mask = pin_to_mask(pin->pin); |
856 | at91_mux_disable_interrupt(pio, mask); | |
3c93600d | 857 | switch (pin->mux) { |
6732ae5c JCPV |
858 | case AT91_MUX_GPIO: |
859 | at91_mux_gpio_enable(pio, mask, 1); | |
860 | break; | |
861 | case AT91_MUX_PERIPH_A: | |
862 | info->ops->mux_A_periph(pio, mask); | |
863 | break; | |
864 | case AT91_MUX_PERIPH_B: | |
865 | info->ops->mux_B_periph(pio, mask); | |
866 | break; | |
867 | case AT91_MUX_PERIPH_C: | |
868 | if (!info->ops->mux_C_periph) | |
869 | return -EINVAL; | |
870 | info->ops->mux_C_periph(pio, mask); | |
871 | break; | |
872 | case AT91_MUX_PERIPH_D: | |
873 | if (!info->ops->mux_D_periph) | |
874 | return -EINVAL; | |
875 | info->ops->mux_D_periph(pio, mask); | |
876 | break; | |
877 | } | |
878 | if (pin->mux) | |
879 | at91_mux_gpio_disable(pio, mask); | |
880 | } | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
6732ae5c JCPV |
885 | static int at91_pmx_get_funcs_count(struct pinctrl_dev *pctldev) |
886 | { | |
887 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
888 | ||
889 | return info->nfunctions; | |
890 | } | |
891 | ||
892 | static const char *at91_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
893 | unsigned selector) | |
894 | { | |
895 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
896 | ||
897 | return info->functions[selector].name; | |
898 | } | |
899 | ||
900 | static int at91_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector, | |
901 | const char * const **groups, | |
902 | unsigned * const num_groups) | |
903 | { | |
904 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
905 | ||
906 | *groups = info->functions[selector].groups; | |
907 | *num_groups = info->functions[selector].ngroups; | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
f6f94f66 AL |
912 | static int at91_gpio_request_enable(struct pinctrl_dev *pctldev, |
913 | struct pinctrl_gpio_range *range, | |
914 | unsigned offset) | |
6732ae5c JCPV |
915 | { |
916 | struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
917 | struct at91_gpio_chip *at91_chip; | |
918 | struct gpio_chip *chip; | |
919 | unsigned mask; | |
920 | ||
921 | if (!range) { | |
922 | dev_err(npct->dev, "invalid range\n"); | |
923 | return -EINVAL; | |
924 | } | |
925 | if (!range->gc) { | |
926 | dev_err(npct->dev, "missing GPIO chip in range\n"); | |
927 | return -EINVAL; | |
928 | } | |
929 | chip = range->gc; | |
370ea611 | 930 | at91_chip = gpiochip_get_data(chip); |
6732ae5c JCPV |
931 | |
932 | dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset); | |
933 | ||
934 | mask = 1 << (offset - chip->base); | |
935 | ||
936 | dev_dbg(npct->dev, "enable pin %u as PIO%c%d 0x%x\n", | |
937 | offset, 'A' + range->id, offset - chip->base, mask); | |
938 | ||
939 | writel_relaxed(mask, at91_chip->regbase + PIO_PER); | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
f6f94f66 AL |
944 | static void at91_gpio_disable_free(struct pinctrl_dev *pctldev, |
945 | struct pinctrl_gpio_range *range, | |
946 | unsigned offset) | |
6732ae5c JCPV |
947 | { |
948 | struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
949 | ||
950 | dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset); | |
951 | /* Set the pin to some default state, GPIO is usually default */ | |
952 | } | |
953 | ||
022ab148 | 954 | static const struct pinmux_ops at91_pmx_ops = { |
6732ae5c JCPV |
955 | .get_functions_count = at91_pmx_get_funcs_count, |
956 | .get_function_name = at91_pmx_get_func_name, | |
957 | .get_function_groups = at91_pmx_get_groups, | |
03e9f0ca | 958 | .set_mux = at91_pmx_set, |
6732ae5c JCPV |
959 | .gpio_request_enable = at91_gpio_request_enable, |
960 | .gpio_disable_free = at91_gpio_disable_free, | |
961 | }; | |
962 | ||
963 | static int at91_pinconf_get(struct pinctrl_dev *pctldev, | |
964 | unsigned pin_id, unsigned long *config) | |
965 | { | |
966 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
967 | void __iomem *pio; | |
968 | unsigned pin; | |
7ebd7a3a | 969 | int div; |
96bb12de | 970 | bool out; |
6732ae5c | 971 | |
1292e693 AB |
972 | *config = 0; |
973 | dev_dbg(info->dev, "%s:%d, pin_id=%d", __func__, __LINE__, pin_id); | |
6732ae5c | 974 | pio = pin_to_controller(info, pin_to_bank(pin_id)); |
1ab36387 DD |
975 | |
976 | if (!pio) | |
977 | return -EINVAL; | |
978 | ||
6732ae5c JCPV |
979 | pin = pin_id % MAX_NB_GPIO_PER_BANK; |
980 | ||
981 | if (at91_mux_get_multidrive(pio, pin)) | |
982 | *config |= MULTI_DRIVE; | |
983 | ||
984 | if (at91_mux_get_pullup(pio, pin)) | |
985 | *config |= PULL_UP; | |
986 | ||
7ebd7a3a JCPV |
987 | if (info->ops->get_deglitch && info->ops->get_deglitch(pio, pin)) |
988 | *config |= DEGLITCH; | |
989 | if (info->ops->get_debounce && info->ops->get_debounce(pio, pin, &div)) | |
990 | *config |= DEBOUNCE | (div << DEBOUNCE_VAL_SHIFT); | |
991 | if (info->ops->get_pulldown && info->ops->get_pulldown(pio, pin)) | |
992 | *config |= PULL_DOWN; | |
993 | if (info->ops->get_schmitt_trig && info->ops->get_schmitt_trig(pio, pin)) | |
994 | *config |= DIS_SCHMIT; | |
4334ac2d MR |
995 | if (info->ops->get_drivestrength) |
996 | *config |= (info->ops->get_drivestrength(pio, pin) | |
997 | << DRIVE_STRENGTH_SHIFT); | |
64e21add CB |
998 | if (info->ops->get_slewrate) |
999 | *config |= (info->ops->get_slewrate(pio, pin) << SLEWRATE_SHIFT); | |
96bb12de BB |
1000 | if (at91_mux_get_output(pio, pin, &out)) |
1001 | *config |= OUTPUT | (out << OUTPUT_VAL_SHIFT); | |
7ebd7a3a | 1002 | |
6732ae5c JCPV |
1003 | return 0; |
1004 | } | |
1005 | ||
1006 | static int at91_pinconf_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
1007 | unsigned pin_id, unsigned long *configs, |
1008 | unsigned num_configs) | |
6732ae5c JCPV |
1009 | { |
1010 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
1011 | unsigned mask; | |
1012 | void __iomem *pio; | |
03b054e9 SY |
1013 | int i; |
1014 | unsigned long config; | |
4334ac2d | 1015 | unsigned pin; |
03b054e9 SY |
1016 | |
1017 | for (i = 0; i < num_configs; i++) { | |
1018 | config = configs[i]; | |
1019 | ||
1020 | dev_dbg(info->dev, | |
1021 | "%s:%d, pin_id=%d, config=0x%lx", | |
1022 | __func__, __LINE__, pin_id, config); | |
1023 | pio = pin_to_controller(info, pin_to_bank(pin_id)); | |
1ab36387 DD |
1024 | |
1025 | if (!pio) | |
1026 | return -EINVAL; | |
1027 | ||
4334ac2d MR |
1028 | pin = pin_id % MAX_NB_GPIO_PER_BANK; |
1029 | mask = pin_to_mask(pin); | |
03b054e9 SY |
1030 | |
1031 | if (config & PULL_UP && config & PULL_DOWN) | |
1032 | return -EINVAL; | |
1033 | ||
96bb12de BB |
1034 | at91_mux_set_output(pio, mask, config & OUTPUT, |
1035 | (config & OUTPUT_VAL) >> OUTPUT_VAL_SHIFT); | |
03b054e9 SY |
1036 | at91_mux_set_pullup(pio, mask, config & PULL_UP); |
1037 | at91_mux_set_multidrive(pio, mask, config & MULTI_DRIVE); | |
1038 | if (info->ops->set_deglitch) | |
1039 | info->ops->set_deglitch(pio, mask, config & DEGLITCH); | |
1040 | if (info->ops->set_debounce) | |
1041 | info->ops->set_debounce(pio, mask, config & DEBOUNCE, | |
7ebd7a3a | 1042 | (config & DEBOUNCE_VAL) >> DEBOUNCE_VAL_SHIFT); |
03b054e9 SY |
1043 | if (info->ops->set_pulldown) |
1044 | info->ops->set_pulldown(pio, mask, config & PULL_DOWN); | |
1045 | if (info->ops->disable_schmitt_trig && config & DIS_SCHMIT) | |
1046 | info->ops->disable_schmitt_trig(pio, mask); | |
4334ac2d MR |
1047 | if (info->ops->set_drivestrength) |
1048 | info->ops->set_drivestrength(pio, pin, | |
1049 | (config & DRIVE_STRENGTH) | |
1050 | >> DRIVE_STRENGTH_SHIFT); | |
64e21add CB |
1051 | if (info->ops->set_slewrate) |
1052 | info->ops->set_slewrate(pio, pin, | |
1053 | (config & SLEWRATE) >> SLEWRATE_SHIFT); | |
03b054e9 SY |
1054 | |
1055 | } /* for each config */ | |
7ebd7a3a | 1056 | |
6732ae5c JCPV |
1057 | return 0; |
1058 | } | |
1059 | ||
4d9b8a8e AB |
1060 | #define DBG_SHOW_FLAG(flag) do { \ |
1061 | if (config & flag) { \ | |
1062 | if (num_conf) \ | |
1063 | seq_puts(s, "|"); \ | |
1064 | seq_puts(s, #flag); \ | |
1065 | num_conf++; \ | |
1066 | } \ | |
1067 | } while (0) | |
1068 | ||
b67328e1 | 1069 | #define DBG_SHOW_FLAG_MASKED(mask, flag, name) do { \ |
4334ac2d MR |
1070 | if ((config & mask) == flag) { \ |
1071 | if (num_conf) \ | |
1072 | seq_puts(s, "|"); \ | |
b67328e1 | 1073 | seq_puts(s, #name); \ |
4334ac2d MR |
1074 | num_conf++; \ |
1075 | } \ | |
1076 | } while (0) | |
1077 | ||
6732ae5c JCPV |
1078 | static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev, |
1079 | struct seq_file *s, unsigned pin_id) | |
1080 | { | |
4d9b8a8e | 1081 | unsigned long config; |
445d2026 | 1082 | int val, num_conf = 0; |
4d9b8a8e | 1083 | |
445d2026 | 1084 | at91_pinconf_get(pctldev, pin_id, &config); |
4d9b8a8e AB |
1085 | |
1086 | DBG_SHOW_FLAG(MULTI_DRIVE); | |
1087 | DBG_SHOW_FLAG(PULL_UP); | |
1088 | DBG_SHOW_FLAG(PULL_DOWN); | |
1089 | DBG_SHOW_FLAG(DIS_SCHMIT); | |
1090 | DBG_SHOW_FLAG(DEGLITCH); | |
b67328e1 CB |
1091 | DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(LOW), |
1092 | DRIVE_STRENGTH_LOW); | |
1093 | DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(MED), | |
1094 | DRIVE_STRENGTH_MED); | |
1095 | DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(HI), | |
1096 | DRIVE_STRENGTH_HI); | |
64e21add | 1097 | DBG_SHOW_FLAG(SLEWRATE); |
4d9b8a8e AB |
1098 | DBG_SHOW_FLAG(DEBOUNCE); |
1099 | if (config & DEBOUNCE) { | |
1100 | val = config >> DEBOUNCE_VAL_SHIFT; | |
1101 | seq_printf(s, "(%d)", val); | |
1102 | } | |
6732ae5c | 1103 | |
4d9b8a8e | 1104 | return; |
6732ae5c JCPV |
1105 | } |
1106 | ||
1107 | static void at91_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, | |
1108 | struct seq_file *s, unsigned group) | |
1109 | { | |
1110 | } | |
1111 | ||
022ab148 | 1112 | static const struct pinconf_ops at91_pinconf_ops = { |
6732ae5c JCPV |
1113 | .pin_config_get = at91_pinconf_get, |
1114 | .pin_config_set = at91_pinconf_set, | |
1115 | .pin_config_dbg_show = at91_pinconf_dbg_show, | |
1116 | .pin_config_group_dbg_show = at91_pinconf_group_dbg_show, | |
1117 | }; | |
1118 | ||
1119 | static struct pinctrl_desc at91_pinctrl_desc = { | |
1120 | .pctlops = &at91_pctrl_ops, | |
1121 | .pmxops = &at91_pmx_ops, | |
1122 | .confops = &at91_pinconf_ops, | |
1123 | .owner = THIS_MODULE, | |
1124 | }; | |
1125 | ||
1126 | static const char *gpio_compat = "atmel,at91rm9200-gpio"; | |
1127 | ||
150632b0 GKH |
1128 | static void at91_pinctrl_child_count(struct at91_pinctrl *info, |
1129 | struct device_node *np) | |
6732ae5c JCPV |
1130 | { |
1131 | struct device_node *child; | |
1132 | ||
1133 | for_each_child_of_node(np, child) { | |
1134 | if (of_device_is_compatible(child, gpio_compat)) { | |
a0b957f3 JCPV |
1135 | if (of_device_is_available(child)) |
1136 | info->nactive_banks++; | |
6732ae5c JCPV |
1137 | } else { |
1138 | info->nfunctions++; | |
1139 | info->ngroups += of_get_child_count(child); | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | ||
150632b0 GKH |
1144 | static int at91_pinctrl_mux_mask(struct at91_pinctrl *info, |
1145 | struct device_node *np) | |
6732ae5c JCPV |
1146 | { |
1147 | int ret = 0; | |
1148 | int size; | |
1164d73a | 1149 | const __be32 *list; |
6732ae5c JCPV |
1150 | |
1151 | list = of_get_property(np, "atmel,mux-mask", &size); | |
1152 | if (!list) { | |
1153 | dev_err(info->dev, "can not read the mux-mask of %d\n", size); | |
1154 | return -EINVAL; | |
1155 | } | |
1156 | ||
1157 | size /= sizeof(*list); | |
a0b957f3 JCPV |
1158 | if (!size || size % gpio_banks) { |
1159 | dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks); | |
6732ae5c JCPV |
1160 | return -EINVAL; |
1161 | } | |
a0b957f3 | 1162 | info->nmux = size / gpio_banks; |
6732ae5c | 1163 | |
a86854d0 KC |
1164 | info->mux_mask = devm_kcalloc(info->dev, size, sizeof(u32), |
1165 | GFP_KERNEL); | |
3da941b0 | 1166 | if (!info->mux_mask) |
6732ae5c | 1167 | return -ENOMEM; |
6732ae5c JCPV |
1168 | |
1169 | ret = of_property_read_u32_array(np, "atmel,mux-mask", | |
1170 | info->mux_mask, size); | |
1171 | if (ret) | |
1172 | dev_err(info->dev, "can not read the mux-mask of %d\n", size); | |
1173 | return ret; | |
1174 | } | |
1175 | ||
150632b0 GKH |
1176 | static int at91_pinctrl_parse_groups(struct device_node *np, |
1177 | struct at91_pin_group *grp, | |
1178 | struct at91_pinctrl *info, u32 index) | |
6732ae5c JCPV |
1179 | { |
1180 | struct at91_pmx_pin *pin; | |
1181 | int size; | |
1164d73a | 1182 | const __be32 *list; |
6732ae5c JCPV |
1183 | int i, j; |
1184 | ||
94f4e54c | 1185 | dev_dbg(info->dev, "group(%d): %pOFn\n", index, np); |
6732ae5c JCPV |
1186 | |
1187 | /* Initialise group */ | |
1188 | grp->name = np->name; | |
1189 | ||
1190 | /* | |
1191 | * the binding format is atmel,pins = <bank pin mux CONFIG ...>, | |
1192 | * do sanity check and calculate pins number | |
1193 | */ | |
1194 | list = of_get_property(np, "atmel,pins", &size); | |
1195 | /* we do not check return since it's safe node passed down */ | |
1196 | size /= sizeof(*list); | |
1197 | if (!size || size % 4) { | |
1198 | dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n"); | |
1199 | return -EINVAL; | |
1200 | } | |
1201 | ||
1202 | grp->npins = size / 4; | |
a86854d0 KC |
1203 | pin = grp->pins_conf = devm_kcalloc(info->dev, |
1204 | grp->npins, | |
1205 | sizeof(struct at91_pmx_pin), | |
1206 | GFP_KERNEL); | |
1207 | grp->pins = devm_kcalloc(info->dev, grp->npins, sizeof(unsigned int), | |
1208 | GFP_KERNEL); | |
6732ae5c JCPV |
1209 | if (!grp->pins_conf || !grp->pins) |
1210 | return -ENOMEM; | |
1211 | ||
1212 | for (i = 0, j = 0; i < size; i += 4, j++) { | |
1213 | pin->bank = be32_to_cpu(*list++); | |
1214 | pin->pin = be32_to_cpu(*list++); | |
1215 | grp->pins[j] = pin->bank * MAX_NB_GPIO_PER_BANK + pin->pin; | |
1216 | pin->mux = be32_to_cpu(*list++); | |
1217 | pin->conf = be32_to_cpu(*list++); | |
1218 | ||
1219 | at91_pin_dbg(info->dev, pin); | |
1220 | pin++; | |
1221 | } | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
150632b0 GKH |
1226 | static int at91_pinctrl_parse_functions(struct device_node *np, |
1227 | struct at91_pinctrl *info, u32 index) | |
6732ae5c JCPV |
1228 | { |
1229 | struct device_node *child; | |
1230 | struct at91_pmx_func *func; | |
1231 | struct at91_pin_group *grp; | |
1232 | int ret; | |
1233 | static u32 grp_index; | |
1234 | u32 i = 0; | |
1235 | ||
94f4e54c | 1236 | dev_dbg(info->dev, "parse function(%d): %pOFn\n", index, np); |
6732ae5c JCPV |
1237 | |
1238 | func = &info->functions[index]; | |
1239 | ||
1240 | /* Initialise function */ | |
1241 | func->name = np->name; | |
1242 | func->ngroups = of_get_child_count(np); | |
ca7162ad | 1243 | if (func->ngroups == 0) { |
6732ae5c JCPV |
1244 | dev_err(info->dev, "no groups defined\n"); |
1245 | return -EINVAL; | |
1246 | } | |
a86854d0 KC |
1247 | func->groups = devm_kcalloc(info->dev, |
1248 | func->ngroups, sizeof(char *), GFP_KERNEL); | |
6732ae5c JCPV |
1249 | if (!func->groups) |
1250 | return -ENOMEM; | |
1251 | ||
1252 | for_each_child_of_node(np, child) { | |
1253 | func->groups[i] = child->name; | |
1254 | grp = &info->groups[grp_index++]; | |
1255 | ret = at91_pinctrl_parse_groups(child, grp, info, i++); | |
d94b986a JL |
1256 | if (ret) { |
1257 | of_node_put(child); | |
6732ae5c | 1258 | return ret; |
d94b986a | 1259 | } |
6732ae5c JCPV |
1260 | } |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
baa9946e | 1265 | static const struct of_device_id at91_pinctrl_of_match[] = { |
4334ac2d | 1266 | { .compatible = "atmel,sama5d3-pinctrl", .data = &sama5d3_ops }, |
6732ae5c JCPV |
1267 | { .compatible = "atmel,at91sam9x5-pinctrl", .data = &at91sam9x5_ops }, |
1268 | { .compatible = "atmel,at91rm9200-pinctrl", .data = &at91rm9200_ops }, | |
a2fcb1ce | 1269 | { .compatible = "microchip,sam9x60-pinctrl", .data = &sam9x60_ops }, |
6732ae5c JCPV |
1270 | { /* sentinel */ } |
1271 | }; | |
1272 | ||
150632b0 GKH |
1273 | static int at91_pinctrl_probe_dt(struct platform_device *pdev, |
1274 | struct at91_pinctrl *info) | |
6732ae5c JCPV |
1275 | { |
1276 | int ret = 0; | |
1277 | int i, j; | |
1278 | uint32_t *tmp; | |
1279 | struct device_node *np = pdev->dev.of_node; | |
1280 | struct device_node *child; | |
1281 | ||
1282 | if (!np) | |
1283 | return -ENODEV; | |
1284 | ||
1285 | info->dev = &pdev->dev; | |
3c93600d | 1286 | info->ops = (struct at91_pinctrl_mux_ops *) |
6732ae5c JCPV |
1287 | of_match_device(at91_pinctrl_of_match, &pdev->dev)->data; |
1288 | at91_pinctrl_child_count(info, np); | |
1289 | ||
a0b957f3 | 1290 | if (gpio_banks < 1) { |
61e310a1 | 1291 | dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n"); |
6732ae5c JCPV |
1292 | return -EINVAL; |
1293 | } | |
1294 | ||
1295 | ret = at91_pinctrl_mux_mask(info, np); | |
1296 | if (ret) | |
1297 | return ret; | |
1298 | ||
1299 | dev_dbg(&pdev->dev, "nmux = %d\n", info->nmux); | |
1300 | ||
1301 | dev_dbg(&pdev->dev, "mux-mask\n"); | |
1302 | tmp = info->mux_mask; | |
a0b957f3 | 1303 | for (i = 0; i < gpio_banks; i++) { |
6732ae5c JCPV |
1304 | for (j = 0; j < info->nmux; j++, tmp++) { |
1305 | dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]); | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions); | |
1310 | dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups); | |
a86854d0 KC |
1311 | info->functions = devm_kcalloc(&pdev->dev, |
1312 | info->nfunctions, | |
1313 | sizeof(struct at91_pmx_func), | |
6732ae5c JCPV |
1314 | GFP_KERNEL); |
1315 | if (!info->functions) | |
1316 | return -ENOMEM; | |
1317 | ||
a86854d0 KC |
1318 | info->groups = devm_kcalloc(&pdev->dev, |
1319 | info->ngroups, | |
1320 | sizeof(struct at91_pin_group), | |
6732ae5c JCPV |
1321 | GFP_KERNEL); |
1322 | if (!info->groups) | |
1323 | return -ENOMEM; | |
1324 | ||
a0b957f3 | 1325 | dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks); |
6732ae5c JCPV |
1326 | dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions); |
1327 | dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups); | |
1328 | ||
1329 | i = 0; | |
1330 | ||
1331 | for_each_child_of_node(np, child) { | |
1332 | if (of_device_is_compatible(child, gpio_compat)) | |
1333 | continue; | |
1334 | ret = at91_pinctrl_parse_functions(child, info, i++); | |
1335 | if (ret) { | |
1336 | dev_err(&pdev->dev, "failed to parse function\n"); | |
d94b986a | 1337 | of_node_put(child); |
6732ae5c JCPV |
1338 | return ret; |
1339 | } | |
1340 | } | |
1341 | ||
1342 | return 0; | |
1343 | } | |
1344 | ||
150632b0 | 1345 | static int at91_pinctrl_probe(struct platform_device *pdev) |
6732ae5c JCPV |
1346 | { |
1347 | struct at91_pinctrl *info; | |
1348 | struct pinctrl_pin_desc *pdesc; | |
a0b957f3 | 1349 | int ret, i, j, k, ngpio_chips_enabled = 0; |
6732ae5c JCPV |
1350 | |
1351 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
1352 | if (!info) | |
1353 | return -ENOMEM; | |
1354 | ||
1355 | ret = at91_pinctrl_probe_dt(pdev, info); | |
1356 | if (ret) | |
1357 | return ret; | |
1358 | ||
1359 | /* | |
1360 | * We need all the GPIO drivers to probe FIRST, or we will not be able | |
1361 | * to obtain references to the struct gpio_chip * for them, and we | |
1362 | * need this to proceed. | |
1363 | */ | |
a0b957f3 JCPV |
1364 | for (i = 0; i < gpio_banks; i++) |
1365 | if (gpio_chips[i]) | |
1366 | ngpio_chips_enabled++; | |
1367 | ||
1368 | if (ngpio_chips_enabled < info->nactive_banks) { | |
1369 | dev_warn(&pdev->dev, | |
1370 | "All GPIO chips are not registered yet (%d/%d)\n", | |
1371 | ngpio_chips_enabled, info->nactive_banks); | |
1372 | devm_kfree(&pdev->dev, info); | |
1373 | return -EPROBE_DEFER; | |
6732ae5c JCPV |
1374 | } |
1375 | ||
1376 | at91_pinctrl_desc.name = dev_name(&pdev->dev); | |
a0b957f3 | 1377 | at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK; |
6732ae5c | 1378 | at91_pinctrl_desc.pins = pdesc = |
a86854d0 KC |
1379 | devm_kcalloc(&pdev->dev, |
1380 | at91_pinctrl_desc.npins, sizeof(*pdesc), | |
1381 | GFP_KERNEL); | |
6732ae5c JCPV |
1382 | |
1383 | if (!at91_pinctrl_desc.pins) | |
1384 | return -ENOMEM; | |
1385 | ||
a0b957f3 | 1386 | for (i = 0, k = 0; i < gpio_banks; i++) { |
6732ae5c JCPV |
1387 | for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) { |
1388 | pdesc->number = k; | |
1389 | pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j); | |
1390 | pdesc++; | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | platform_set_drvdata(pdev, info); | |
5c67425a LD |
1395 | info->pctl = devm_pinctrl_register(&pdev->dev, &at91_pinctrl_desc, |
1396 | info); | |
6732ae5c | 1397 | |
323de9ef | 1398 | if (IS_ERR(info->pctl)) { |
6732ae5c | 1399 | dev_err(&pdev->dev, "could not register AT91 pinctrl driver\n"); |
323de9ef | 1400 | return PTR_ERR(info->pctl); |
6732ae5c JCPV |
1401 | } |
1402 | ||
1403 | /* We will handle a range of GPIO pins */ | |
a0b957f3 JCPV |
1404 | for (i = 0; i < gpio_banks; i++) |
1405 | if (gpio_chips[i]) | |
1406 | pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range); | |
6732ae5c JCPV |
1407 | |
1408 | dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n"); | |
1409 | ||
1410 | return 0; | |
6732ae5c JCPV |
1411 | } |
1412 | ||
8af584b8 RG |
1413 | static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset) |
1414 | { | |
370ea611 | 1415 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
8af584b8 RG |
1416 | void __iomem *pio = at91_gpio->regbase; |
1417 | unsigned mask = 1 << offset; | |
1418 | u32 osr; | |
1419 | ||
1420 | osr = readl_relaxed(pio + PIO_OSR); | |
3c827873 MV |
1421 | if (osr & mask) |
1422 | return GPIO_LINE_DIRECTION_OUT; | |
1423 | ||
1424 | return GPIO_LINE_DIRECTION_IN; | |
8af584b8 RG |
1425 | } |
1426 | ||
6732ae5c JCPV |
1427 | static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
1428 | { | |
370ea611 | 1429 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1430 | void __iomem *pio = at91_gpio->regbase; |
1431 | unsigned mask = 1 << offset; | |
1432 | ||
1433 | writel_relaxed(mask, pio + PIO_ODR); | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | static int at91_gpio_get(struct gpio_chip *chip, unsigned offset) | |
1438 | { | |
370ea611 | 1439 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1440 | void __iomem *pio = at91_gpio->regbase; |
1441 | unsigned mask = 1 << offset; | |
1442 | u32 pdsr; | |
1443 | ||
1444 | pdsr = readl_relaxed(pio + PIO_PDSR); | |
1445 | return (pdsr & mask) != 0; | |
1446 | } | |
1447 | ||
1448 | static void at91_gpio_set(struct gpio_chip *chip, unsigned offset, | |
1449 | int val) | |
1450 | { | |
370ea611 | 1451 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1452 | void __iomem *pio = at91_gpio->regbase; |
1453 | unsigned mask = 1 << offset; | |
1454 | ||
1455 | writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); | |
1456 | } | |
1457 | ||
1893b2cf AS |
1458 | static void at91_gpio_set_multiple(struct gpio_chip *chip, |
1459 | unsigned long *mask, unsigned long *bits) | |
1460 | { | |
370ea611 | 1461 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
1893b2cf AS |
1462 | void __iomem *pio = at91_gpio->regbase; |
1463 | ||
1464 | #define BITS_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1)) | |
1465 | /* Mask additionally to ngpio as not all GPIO controllers have 32 pins */ | |
1466 | uint32_t set_mask = (*mask & *bits) & BITS_MASK(chip->ngpio); | |
1467 | uint32_t clear_mask = (*mask & ~(*bits)) & BITS_MASK(chip->ngpio); | |
1468 | ||
1469 | writel_relaxed(set_mask, pio + PIO_SODR); | |
1470 | writel_relaxed(clear_mask, pio + PIO_CODR); | |
1471 | } | |
1472 | ||
6732ae5c JCPV |
1473 | static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset, |
1474 | int val) | |
1475 | { | |
370ea611 | 1476 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1477 | void __iomem *pio = at91_gpio->regbase; |
1478 | unsigned mask = 1 << offset; | |
1479 | ||
1480 | writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); | |
1481 | writel_relaxed(mask, pio + PIO_OER); | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | ||
6732ae5c JCPV |
1486 | #ifdef CONFIG_DEBUG_FS |
1487 | static void at91_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
1488 | { | |
1489 | enum at91_mux mode; | |
1490 | int i; | |
370ea611 | 1491 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c | 1492 | void __iomem *pio = at91_gpio->regbase; |
5bae1f08 | 1493 | const char *gpio_label; |
6732ae5c | 1494 | |
5bae1f08 | 1495 | for_each_requested_gpio(chip, i, gpio_label) { |
47f22716 | 1496 | unsigned mask = pin_to_mask(i); |
6732ae5c | 1497 | |
6732ae5c JCPV |
1498 | mode = at91_gpio->ops->get_periph(pio, mask); |
1499 | seq_printf(s, "[%s] GPIO%s%d: ", | |
1500 | gpio_label, chip->label, i); | |
1501 | if (mode == AT91_MUX_GPIO) { | |
853b6bf0 MC |
1502 | seq_printf(s, "[gpio] "); |
1503 | seq_printf(s, "%s ", | |
1504 | readl_relaxed(pio + PIO_OSR) & mask ? | |
1505 | "output" : "input"); | |
1506 | seq_printf(s, "%s\n", | |
1507 | readl_relaxed(pio + PIO_PDSR) & mask ? | |
1508 | "set" : "clear"); | |
6732ae5c JCPV |
1509 | } else { |
1510 | seq_printf(s, "[periph %c]\n", | |
1511 | mode + 'A' - 1); | |
1512 | } | |
1513 | } | |
1514 | } | |
1515 | #else | |
1516 | #define at91_gpio_dbg_show NULL | |
1517 | #endif | |
1518 | ||
1519 | /* Several AIC controller irqs are dispatched through this GPIO handler. | |
1520 | * To use any AT91_PIN_* as an externally triggered IRQ, first call | |
1521 | * at91_set_gpio_input() then maybe enable its glitch filter. | |
1522 | * Then just request_irq() with the pin ID; it works like any ARM IRQ | |
1523 | * handler. | |
1524 | * First implementation always triggers on rising and falling edges | |
1525 | * whereas the newer PIO3 can be additionally configured to trigger on | |
1526 | * level, edge with any polarity. | |
1527 | * | |
1528 | * Alternatively, certain pins may be used directly as IRQ0..IRQ6 after | |
1529 | * configuring them with at91_set_a_periph() or at91_set_b_periph(). | |
1530 | * IRQ0..IRQ6 should be configurable, e.g. level vs edge triggering. | |
1531 | */ | |
1532 | ||
1533 | static void gpio_irq_mask(struct irq_data *d) | |
1534 | { | |
1535 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1536 | void __iomem *pio = at91_gpio->regbase; | |
1537 | unsigned mask = 1 << d->hwirq; | |
1538 | ||
1539 | if (pio) | |
1540 | writel_relaxed(mask, pio + PIO_IDR); | |
1541 | } | |
1542 | ||
1543 | static void gpio_irq_unmask(struct irq_data *d) | |
1544 | { | |
1545 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1546 | void __iomem *pio = at91_gpio->regbase; | |
1547 | unsigned mask = 1 << d->hwirq; | |
1548 | ||
1549 | if (pio) | |
1550 | writel_relaxed(mask, pio + PIO_IER); | |
1551 | } | |
1552 | ||
1553 | static int gpio_irq_type(struct irq_data *d, unsigned type) | |
1554 | { | |
1555 | switch (type) { | |
1556 | case IRQ_TYPE_NONE: | |
1557 | case IRQ_TYPE_EDGE_BOTH: | |
1558 | return 0; | |
1559 | default: | |
1560 | return -EINVAL; | |
1561 | } | |
1562 | } | |
1563 | ||
1564 | /* Alternate irq type for PIO3 support */ | |
1565 | static int alt_gpio_irq_type(struct irq_data *d, unsigned type) | |
1566 | { | |
1567 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1568 | void __iomem *pio = at91_gpio->regbase; | |
1569 | unsigned mask = 1 << d->hwirq; | |
1570 | ||
1571 | switch (type) { | |
1572 | case IRQ_TYPE_EDGE_RISING: | |
c639845b | 1573 | irq_set_handler_locked(d, handle_simple_irq); |
6732ae5c JCPV |
1574 | writel_relaxed(mask, pio + PIO_ESR); |
1575 | writel_relaxed(mask, pio + PIO_REHLSR); | |
1576 | break; | |
1577 | case IRQ_TYPE_EDGE_FALLING: | |
c639845b | 1578 | irq_set_handler_locked(d, handle_simple_irq); |
6732ae5c JCPV |
1579 | writel_relaxed(mask, pio + PIO_ESR); |
1580 | writel_relaxed(mask, pio + PIO_FELLSR); | |
1581 | break; | |
1582 | case IRQ_TYPE_LEVEL_LOW: | |
c639845b | 1583 | irq_set_handler_locked(d, handle_level_irq); |
6732ae5c JCPV |
1584 | writel_relaxed(mask, pio + PIO_LSR); |
1585 | writel_relaxed(mask, pio + PIO_FELLSR); | |
1586 | break; | |
1587 | case IRQ_TYPE_LEVEL_HIGH: | |
c639845b | 1588 | irq_set_handler_locked(d, handle_level_irq); |
6732ae5c JCPV |
1589 | writel_relaxed(mask, pio + PIO_LSR); |
1590 | writel_relaxed(mask, pio + PIO_REHLSR); | |
1591 | break; | |
1592 | case IRQ_TYPE_EDGE_BOTH: | |
1593 | /* | |
1594 | * disable additional interrupt modes: | |
1595 | * fall back to default behavior | |
1596 | */ | |
c639845b | 1597 | irq_set_handler_locked(d, handle_simple_irq); |
6732ae5c JCPV |
1598 | writel_relaxed(mask, pio + PIO_AIMDR); |
1599 | return 0; | |
1600 | case IRQ_TYPE_NONE: | |
1601 | default: | |
1c5fb66a | 1602 | pr_warn("AT91: No type for GPIO irq offset %d\n", d->irq); |
6732ae5c JCPV |
1603 | return -EINVAL; |
1604 | } | |
1605 | ||
1606 | /* enable additional interrupt modes */ | |
1607 | writel_relaxed(mask, pio + PIO_AIMER); | |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | ||
80cc3732 AS |
1612 | static void gpio_irq_ack(struct irq_data *d) |
1613 | { | |
1614 | /* the interrupt is already cleared before by reading ISR */ | |
1615 | } | |
1616 | ||
6732ae5c | 1617 | #ifdef CONFIG_PM |
647f8d94 LD |
1618 | |
1619 | static u32 wakeups[MAX_GPIO_BANKS]; | |
1620 | static u32 backups[MAX_GPIO_BANKS]; | |
1621 | ||
6732ae5c JCPV |
1622 | static int gpio_irq_set_wake(struct irq_data *d, unsigned state) |
1623 | { | |
1624 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1625 | unsigned bank = at91_gpio->pioc_idx; | |
647f8d94 | 1626 | unsigned mask = 1 << d->hwirq; |
6732ae5c JCPV |
1627 | |
1628 | if (unlikely(bank >= MAX_GPIO_BANKS)) | |
1629 | return -EINVAL; | |
1630 | ||
647f8d94 LD |
1631 | if (state) |
1632 | wakeups[bank] |= mask; | |
1633 | else | |
1634 | wakeups[bank] &= ~mask; | |
1635 | ||
6732ae5c JCPV |
1636 | irq_set_irq_wake(at91_gpio->pioc_virq, state); |
1637 | ||
1638 | return 0; | |
1639 | } | |
647f8d94 LD |
1640 | |
1641 | void at91_pinctrl_gpio_suspend(void) | |
1642 | { | |
1643 | int i; | |
1644 | ||
1645 | for (i = 0; i < gpio_banks; i++) { | |
1646 | void __iomem *pio; | |
1647 | ||
1648 | if (!gpio_chips[i]) | |
1649 | continue; | |
1650 | ||
1651 | pio = gpio_chips[i]->regbase; | |
1652 | ||
d480239b BD |
1653 | backups[i] = readl_relaxed(pio + PIO_IMR); |
1654 | writel_relaxed(backups[i], pio + PIO_IDR); | |
1655 | writel_relaxed(wakeups[i], pio + PIO_IER); | |
647f8d94 | 1656 | |
795f9953 BB |
1657 | if (!wakeups[i]) |
1658 | clk_disable_unprepare(gpio_chips[i]->clock); | |
1659 | else | |
647f8d94 LD |
1660 | printk(KERN_DEBUG "GPIO-%c may wake for %08x\n", |
1661 | 'A'+i, wakeups[i]); | |
647f8d94 LD |
1662 | } |
1663 | } | |
1664 | ||
1665 | void at91_pinctrl_gpio_resume(void) | |
1666 | { | |
1667 | int i; | |
1668 | ||
1669 | for (i = 0; i < gpio_banks; i++) { | |
1670 | void __iomem *pio; | |
1671 | ||
1672 | if (!gpio_chips[i]) | |
1673 | continue; | |
1674 | ||
1675 | pio = gpio_chips[i]->regbase; | |
1676 | ||
37ef1d92 BB |
1677 | if (!wakeups[i]) |
1678 | clk_prepare_enable(gpio_chips[i]->clock); | |
647f8d94 | 1679 | |
d480239b BD |
1680 | writel_relaxed(wakeups[i], pio + PIO_IDR); |
1681 | writel_relaxed(backups[i], pio + PIO_IER); | |
647f8d94 LD |
1682 | } |
1683 | } | |
1684 | ||
6732ae5c JCPV |
1685 | #else |
1686 | #define gpio_irq_set_wake NULL | |
647f8d94 | 1687 | #endif /* CONFIG_PM */ |
6732ae5c | 1688 | |
bd0b9ac4 | 1689 | static void gpio_irq_handler(struct irq_desc *desc) |
6732ae5c | 1690 | { |
5663bb27 | 1691 | struct irq_chip *chip = irq_desc_get_chip(desc); |
80cc3732 | 1692 | struct gpio_chip *gpio_chip = irq_desc_get_handler_data(desc); |
370ea611 | 1693 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(gpio_chip); |
6732ae5c JCPV |
1694 | void __iomem *pio = at91_gpio->regbase; |
1695 | unsigned long isr; | |
1696 | int n; | |
1697 | ||
1698 | chained_irq_enter(chip, desc); | |
1699 | for (;;) { | |
1700 | /* Reading ISR acks pending (edge triggered) GPIO interrupts. | |
c2eb9e7f | 1701 | * When there are none pending, we're finished unless we need |
6732ae5c JCPV |
1702 | * to process multiple banks (like ID_PIOCDE on sam9263). |
1703 | */ | |
1704 | isr = readl_relaxed(pio + PIO_ISR) & readl_relaxed(pio + PIO_IMR); | |
1705 | if (!isr) { | |
1706 | if (!at91_gpio->next) | |
1707 | break; | |
1708 | at91_gpio = at91_gpio->next; | |
1709 | pio = at91_gpio->regbase; | |
cccb0c3e | 1710 | gpio_chip = &at91_gpio->chip; |
6732ae5c JCPV |
1711 | continue; |
1712 | } | |
1713 | ||
05daa16a | 1714 | for_each_set_bit(n, &isr, BITS_PER_LONG) { |
80cc3732 | 1715 | generic_handle_irq(irq_find_mapping( |
f0fbe7bc | 1716 | gpio_chip->irq.domain, n)); |
6732ae5c JCPV |
1717 | } |
1718 | } | |
1719 | chained_irq_exit(chip, desc); | |
1720 | /* now it may re-trigger */ | |
1721 | } | |
1722 | ||
834e1678 | 1723 | static int at91_gpio_of_irq_setup(struct platform_device *pdev, |
6732ae5c JCPV |
1724 | struct at91_gpio_chip *at91_gpio) |
1725 | { | |
a0b957f3 | 1726 | struct gpio_chip *gpiochip_prev = NULL; |
cccb0c3e | 1727 | struct at91_gpio_chip *prev = NULL; |
6732ae5c | 1728 | struct irq_data *d = irq_get_irq_data(at91_gpio->pioc_virq); |
0c3dfa17 | 1729 | struct irq_chip *gpio_irqchip; |
35dea5d7 LW |
1730 | struct gpio_irq_chip *girq; |
1731 | int i; | |
6732ae5c | 1732 | |
35dea5d7 LW |
1733 | gpio_irqchip = devm_kzalloc(&pdev->dev, sizeof(*gpio_irqchip), |
1734 | GFP_KERNEL); | |
0c3dfa17 LD |
1735 | if (!gpio_irqchip) |
1736 | return -ENOMEM; | |
1737 | ||
6732ae5c JCPV |
1738 | at91_gpio->pioc_hwirq = irqd_to_hwirq(d); |
1739 | ||
0c3dfa17 LD |
1740 | gpio_irqchip->name = "GPIO"; |
1741 | gpio_irqchip->irq_ack = gpio_irq_ack; | |
1742 | gpio_irqchip->irq_disable = gpio_irq_mask; | |
1743 | gpio_irqchip->irq_mask = gpio_irq_mask; | |
1744 | gpio_irqchip->irq_unmask = gpio_irq_unmask; | |
1745 | gpio_irqchip->irq_set_wake = gpio_irq_set_wake, | |
1746 | gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type; | |
6732ae5c JCPV |
1747 | |
1748 | /* Disable irqs of this PIO controller */ | |
1749 | writel_relaxed(~0, at91_gpio->regbase + PIO_IDR); | |
1750 | ||
80cc3732 AS |
1751 | /* |
1752 | * Let the generic code handle this edge IRQ, the the chained | |
1753 | * handler will perform the actual work of handling the parent | |
1754 | * interrupt. | |
1755 | */ | |
35dea5d7 LW |
1756 | girq = &at91_gpio->chip.irq; |
1757 | girq->chip = gpio_irqchip; | |
1758 | girq->default_type = IRQ_TYPE_NONE; | |
1759 | girq->handler = handle_edge_irq; | |
6732ae5c | 1760 | |
35dea5d7 LW |
1761 | /* |
1762 | * The top level handler handles one bank of GPIOs, except | |
cccb0c3e AS |
1763 | * on some SoC it can handle up to three... |
1764 | * We only set up the handler for the first of the list. | |
1765 | */ | |
a0b957f3 JCPV |
1766 | gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq); |
1767 | if (!gpiochip_prev) { | |
35dea5d7 LW |
1768 | girq->parent_handler = gpio_irq_handler; |
1769 | girq->num_parents = 1; | |
1770 | girq->parents = devm_kcalloc(&pdev->dev, 1, | |
1771 | sizeof(*girq->parents), | |
1772 | GFP_KERNEL); | |
1773 | if (!girq->parents) | |
1774 | return -ENOMEM; | |
1775 | girq->parents[0] = at91_gpio->pioc_virq; | |
cccb0c3e | 1776 | return 0; |
a0b957f3 | 1777 | } |
cccb0c3e | 1778 | |
370ea611 | 1779 | prev = gpiochip_get_data(gpiochip_prev); |
a0b957f3 JCPV |
1780 | /* we can only have 2 banks before */ |
1781 | for (i = 0; i < 2; i++) { | |
1782 | if (prev->next) { | |
1783 | prev = prev->next; | |
1784 | } else { | |
1785 | prev->next = at91_gpio; | |
1786 | return 0; | |
1787 | } | |
1788 | } | |
1789 | ||
1790 | return -EINVAL; | |
6732ae5c JCPV |
1791 | } |
1792 | ||
1793 | /* This structure is replicated for each GPIO block allocated at probe time */ | |
234b6513 | 1794 | static const struct gpio_chip at91_gpio_template = { |
98c85d58 JG |
1795 | .request = gpiochip_generic_request, |
1796 | .free = gpiochip_generic_free, | |
8af584b8 | 1797 | .get_direction = at91_gpio_get_direction, |
6732ae5c JCPV |
1798 | .direction_input = at91_gpio_direction_input, |
1799 | .get = at91_gpio_get, | |
1800 | .direction_output = at91_gpio_direction_output, | |
1801 | .set = at91_gpio_set, | |
1893b2cf | 1802 | .set_multiple = at91_gpio_set_multiple, |
6732ae5c | 1803 | .dbg_show = at91_gpio_dbg_show, |
9fb1f39e | 1804 | .can_sleep = false, |
6732ae5c JCPV |
1805 | .ngpio = MAX_NB_GPIO_PER_BANK, |
1806 | }; | |
1807 | ||
baa9946e | 1808 | static const struct of_device_id at91_gpio_of_match[] = { |
6732ae5c JCPV |
1809 | { .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, }, |
1810 | { .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops }, | |
a2fcb1ce | 1811 | { .compatible = "microchip,sam9x60-gpio", .data = &sam9x60_ops }, |
6732ae5c JCPV |
1812 | { /* sentinel */ } |
1813 | }; | |
1814 | ||
150632b0 | 1815 | static int at91_gpio_probe(struct platform_device *pdev) |
6732ae5c JCPV |
1816 | { |
1817 | struct device_node *np = pdev->dev.of_node; | |
6732ae5c JCPV |
1818 | struct at91_gpio_chip *at91_chip = NULL; |
1819 | struct gpio_chip *chip; | |
1820 | struct pinctrl_gpio_range *range; | |
1821 | int ret = 0; | |
32b01a36 | 1822 | int irq, i; |
6732ae5c JCPV |
1823 | int alias_idx = of_alias_get_id(np, "gpio"); |
1824 | uint32_t ngpio; | |
32b01a36 | 1825 | char **names; |
6732ae5c JCPV |
1826 | |
1827 | BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips)); | |
1828 | if (gpio_chips[alias_idx]) { | |
1829 | ret = -EBUSY; | |
1830 | goto err; | |
1831 | } | |
1832 | ||
6732ae5c JCPV |
1833 | irq = platform_get_irq(pdev, 0); |
1834 | if (irq < 0) { | |
1835 | ret = irq; | |
1836 | goto err; | |
1837 | } | |
1838 | ||
1839 | at91_chip = devm_kzalloc(&pdev->dev, sizeof(*at91_chip), GFP_KERNEL); | |
1840 | if (!at91_chip) { | |
1841 | ret = -ENOMEM; | |
1842 | goto err; | |
1843 | } | |
1844 | ||
4b024225 | 1845 | at91_chip->regbase = devm_platform_ioremap_resource(pdev, 0); |
9e0c1fb2 TR |
1846 | if (IS_ERR(at91_chip->regbase)) { |
1847 | ret = PTR_ERR(at91_chip->regbase); | |
6732ae5c JCPV |
1848 | goto err; |
1849 | } | |
1850 | ||
3c93600d | 1851 | at91_chip->ops = (struct at91_pinctrl_mux_ops *) |
6732ae5c JCPV |
1852 | of_match_device(at91_gpio_of_match, &pdev->dev)->data; |
1853 | at91_chip->pioc_virq = irq; | |
1854 | at91_chip->pioc_idx = alias_idx; | |
1855 | ||
02b837ff | 1856 | at91_chip->clock = devm_clk_get(&pdev->dev, NULL); |
6732ae5c JCPV |
1857 | if (IS_ERR(at91_chip->clock)) { |
1858 | dev_err(&pdev->dev, "failed to get clock, ignoring.\n"); | |
70e41974 | 1859 | ret = PTR_ERR(at91_chip->clock); |
6732ae5c JCPV |
1860 | goto err; |
1861 | } | |
1862 | ||
7d3a3fe6 | 1863 | ret = clk_prepare_enable(at91_chip->clock); |
70e41974 | 1864 | if (ret) { |
7d3a3fe6 | 1865 | dev_err(&pdev->dev, "failed to prepare and enable clock, ignoring.\n"); |
70e41974 | 1866 | goto clk_enable_err; |
6732ae5c JCPV |
1867 | } |
1868 | ||
1869 | at91_chip->chip = at91_gpio_template; | |
1870 | ||
1871 | chip = &at91_chip->chip; | |
1872 | chip->of_node = np; | |
1873 | chip->label = dev_name(&pdev->dev); | |
58383c78 | 1874 | chip->parent = &pdev->dev; |
6732ae5c JCPV |
1875 | chip->owner = THIS_MODULE; |
1876 | chip->base = alias_idx * MAX_NB_GPIO_PER_BANK; | |
1877 | ||
1878 | if (!of_property_read_u32(np, "#gpio-lines", &ngpio)) { | |
1879 | if (ngpio >= MAX_NB_GPIO_PER_BANK) | |
1880 | pr_err("at91_gpio.%d, gpio-nb >= %d failback to %d\n", | |
1881 | alias_idx, MAX_NB_GPIO_PER_BANK, MAX_NB_GPIO_PER_BANK); | |
1882 | else | |
1883 | chip->ngpio = ngpio; | |
1884 | } | |
1885 | ||
a86854d0 | 1886 | names = devm_kcalloc(&pdev->dev, chip->ngpio, sizeof(char *), |
3c93600d | 1887 | GFP_KERNEL); |
32b01a36 JCPV |
1888 | |
1889 | if (!names) { | |
1890 | ret = -ENOMEM; | |
70e41974 | 1891 | goto clk_enable_err; |
32b01a36 JCPV |
1892 | } |
1893 | ||
1894 | for (i = 0; i < chip->ngpio; i++) | |
1895 | names[i] = kasprintf(GFP_KERNEL, "pio%c%d", alias_idx + 'A', i); | |
1896 | ||
3c93600d | 1897 | chip->names = (const char *const *)names; |
32b01a36 | 1898 | |
6732ae5c JCPV |
1899 | range = &at91_chip->range; |
1900 | range->name = chip->label; | |
1901 | range->id = alias_idx; | |
1902 | range->pin_base = range->base = range->id * MAX_NB_GPIO_PER_BANK; | |
1903 | ||
1904 | range->npins = chip->ngpio; | |
1905 | range->gc = chip; | |
1906 | ||
35dea5d7 LW |
1907 | ret = at91_gpio_of_irq_setup(pdev, at91_chip); |
1908 | if (ret) | |
1909 | goto gpiochip_add_err; | |
1910 | ||
370ea611 | 1911 | ret = gpiochip_add_data(chip, at91_chip); |
6732ae5c | 1912 | if (ret) |
70e41974 | 1913 | goto gpiochip_add_err; |
6732ae5c JCPV |
1914 | |
1915 | gpio_chips[alias_idx] = at91_chip; | |
1916 | gpio_banks = max(gpio_banks, alias_idx + 1); | |
1917 | ||
6732ae5c JCPV |
1918 | dev_info(&pdev->dev, "at address %p\n", at91_chip->regbase); |
1919 | ||
1920 | return 0; | |
1921 | ||
70e41974 | 1922 | gpiochip_add_err: |
70e41974 | 1923 | clk_enable_err: |
7d3a3fe6 | 1924 | clk_disable_unprepare(at91_chip->clock); |
6732ae5c JCPV |
1925 | err: |
1926 | dev_err(&pdev->dev, "Failure %i for GPIO %i\n", ret, alias_idx); | |
1927 | ||
1928 | return ret; | |
1929 | } | |
1930 | ||
1931 | static struct platform_driver at91_gpio_driver = { | |
1932 | .driver = { | |
1933 | .name = "gpio-at91", | |
606fca94 | 1934 | .of_match_table = at91_gpio_of_match, |
6732ae5c JCPV |
1935 | }, |
1936 | .probe = at91_gpio_probe, | |
1937 | }; | |
1938 | ||
1939 | static struct platform_driver at91_pinctrl_driver = { | |
1940 | .driver = { | |
1941 | .name = "pinctrl-at91", | |
606fca94 | 1942 | .of_match_table = at91_pinctrl_of_match, |
6732ae5c JCPV |
1943 | }, |
1944 | .probe = at91_pinctrl_probe, | |
6732ae5c JCPV |
1945 | }; |
1946 | ||
bab7f5a4 TR |
1947 | static struct platform_driver * const drivers[] = { |
1948 | &at91_gpio_driver, | |
1949 | &at91_pinctrl_driver, | |
1950 | }; | |
1951 | ||
6732ae5c JCPV |
1952 | static int __init at91_pinctrl_init(void) |
1953 | { | |
bab7f5a4 | 1954 | return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
6732ae5c JCPV |
1955 | } |
1956 | arch_initcall(at91_pinctrl_init); |