Commit | Line | Data |
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ecb07684 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
e9d35947 | 2 | /* |
c103de24 | 3 | * Access to GPIOs on TWL4030/TPS659x0 chips |
e9d35947 DB |
4 | * |
5 | * Copyright (C) 2006-2007 Texas Instruments, Inc. | |
6 | * Copyright (C) 2006 MontaVista Software, Inc. | |
7 | * | |
8 | * Code re-arranged and cleaned up by: | |
9 | * Syed Mohammed Khasim <x0khasim@ti.com> | |
10 | * | |
11 | * Initial Code: | |
12 | * Andy Lowe / Nishanth Menon | |
e9d35947 DB |
13 | */ |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/kthread.h> | |
19 | #include <linux/irq.h> | |
ba21d55f | 20 | #include <linux/gpio/driver.h> |
e9d35947 | 21 | #include <linux/platform_device.h> |
b8589e2a BC |
22 | #include <linux/of.h> |
23 | #include <linux/irqdomain.h> | |
e9d35947 | 24 | |
a2054256 | 25 | #include <linux/mfd/twl.h> |
e9d35947 | 26 | |
e9d35947 DB |
27 | /* |
28 | * The GPIO "subchip" supports 18 GPIOs which can be configured as | |
29 | * inputs or outputs, with pullups or pulldowns on each pin. Each | |
30 | * GPIO can trigger interrupts on either or both edges. | |
31 | * | |
32 | * GPIO interrupts can be fed to either of two IRQ lines; this is | |
33 | * intended to support multiple hosts. | |
34 | * | |
35 | * There are also two LED pins used sometimes as output-only GPIOs. | |
36 | */ | |
37 | ||
e9d35947 DB |
38 | /* genirq interfaces are not available to modules */ |
39 | #ifdef MODULE | |
40 | #define is_module() true | |
41 | #else | |
42 | #define is_module() false | |
43 | #endif | |
44 | ||
45 | /* GPIO_CTRL Fields */ | |
46 | #define MASK_GPIO_CTRL_GPIO0CD1 BIT(0) | |
47 | #define MASK_GPIO_CTRL_GPIO1CD2 BIT(1) | |
48 | #define MASK_GPIO_CTRL_GPIO_ON BIT(2) | |
49 | ||
50 | /* Mask for GPIO registers when aggregated into a 32-bit integer */ | |
51 | #define GPIO_32_MASK 0x0003ffff | |
52 | ||
72c7901e PU |
53 | struct gpio_twl4030_priv { |
54 | struct gpio_chip gpio_chip; | |
c111feab | 55 | struct mutex mutex; |
72c7901e PU |
56 | int irq_base; |
57 | ||
c111feab | 58 | /* Bitfields for state caching */ |
72c7901e | 59 | unsigned int usage_count; |
c111feab PU |
60 | unsigned int direction; |
61 | unsigned int out_state; | |
72c7901e | 62 | }; |
e9d35947 DB |
63 | |
64 | /*----------------------------------------------------------------------*/ | |
65 | ||
66 | /* | |
67 | * To configure TWL4030 GPIO module registers | |
68 | */ | |
69 | static inline int gpio_twl4030_write(u8 address, u8 data) | |
70 | { | |
fc7b92fc | 71 | return twl_i2c_write_u8(TWL4030_MODULE_GPIO, data, address); |
e9d35947 DB |
72 | } |
73 | ||
74 | /*----------------------------------------------------------------------*/ | |
75 | ||
76 | /* | |
9859eb99 | 77 | * LED register offsets from TWL_MODULE_LED base |
e9d35947 DB |
78 | * PWMs A and B are dedicated to LEDs A and B, respectively. |
79 | */ | |
80 | ||
9859eb99 PU |
81 | #define TWL4030_LED_LEDEN_REG 0x00 |
82 | #define TWL4030_PWMAON_REG 0x01 | |
83 | #define TWL4030_PWMAOFF_REG 0x02 | |
84 | #define TWL4030_PWMBON_REG 0x03 | |
85 | #define TWL4030_PWMBOFF_REG 0x04 | |
e9d35947 DB |
86 | |
87 | /* LEDEN bits */ | |
88 | #define LEDEN_LEDAON BIT(0) | |
89 | #define LEDEN_LEDBON BIT(1) | |
90 | #define LEDEN_LEDAEXT BIT(2) | |
91 | #define LEDEN_LEDBEXT BIT(3) | |
92 | #define LEDEN_LEDAPWM BIT(4) | |
93 | #define LEDEN_LEDBPWM BIT(5) | |
94 | #define LEDEN_PWM_LENGTHA BIT(6) | |
95 | #define LEDEN_PWM_LENGTHB BIT(7) | |
96 | ||
e9d35947 DB |
97 | #define PWMxON_LENGTH BIT(7) |
98 | ||
99 | /*----------------------------------------------------------------------*/ | |
100 | ||
101 | /* | |
102 | * To read a TWL4030 GPIO module register | |
103 | */ | |
104 | static inline int gpio_twl4030_read(u8 address) | |
105 | { | |
106 | u8 data; | |
107 | int ret = 0; | |
108 | ||
fc7b92fc | 109 | ret = twl_i2c_read_u8(TWL4030_MODULE_GPIO, &data, address); |
e9d35947 DB |
110 | return (ret < 0) ? ret : data; |
111 | } | |
112 | ||
113 | /*----------------------------------------------------------------------*/ | |
114 | ||
c111feab | 115 | static u8 cached_leden; |
e9d35947 DB |
116 | |
117 | /* The LED lines are open drain outputs ... a FET pulls to GND, so an | |
118 | * external pullup is needed. We could also expose the integrated PWM | |
119 | * as a LED brightness control; we initialize it as "always on". | |
120 | */ | |
121 | static void twl4030_led_set_value(int led, int value) | |
122 | { | |
123 | u8 mask = LEDEN_LEDAON | LEDEN_LEDAPWM; | |
e9d35947 DB |
124 | |
125 | if (led) | |
126 | mask <<= 1; | |
127 | ||
e9d35947 DB |
128 | if (value) |
129 | cached_leden &= ~mask; | |
130 | else | |
131 | cached_leden |= mask; | |
fd0f885b AS |
132 | |
133 | WARN_ON_ONCE(twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, | |
134 | TWL4030_LED_LEDEN_REG)); | |
e9d35947 DB |
135 | } |
136 | ||
137 | static int twl4030_set_gpio_direction(int gpio, int is_input) | |
138 | { | |
139 | u8 d_bnk = gpio >> 3; | |
140 | u8 d_msk = BIT(gpio & 0x7); | |
141 | u8 reg = 0; | |
142 | u8 base = REG_GPIODATADIR1 + d_bnk; | |
143 | int ret = 0; | |
144 | ||
e9d35947 DB |
145 | ret = gpio_twl4030_read(base); |
146 | if (ret >= 0) { | |
147 | if (is_input) | |
148 | reg = ret & ~d_msk; | |
149 | else | |
150 | reg = ret | d_msk; | |
151 | ||
152 | ret = gpio_twl4030_write(base, reg); | |
153 | } | |
e9d35947 DB |
154 | return ret; |
155 | } | |
156 | ||
ab8c1e82 LW |
157 | static int twl4030_get_gpio_direction(int gpio) |
158 | { | |
159 | u8 d_bnk = gpio >> 3; | |
160 | u8 d_msk = BIT(gpio & 0x7); | |
161 | u8 base = REG_GPIODATADIR1 + d_bnk; | |
162 | int ret = 0; | |
163 | ||
164 | ret = gpio_twl4030_read(base); | |
165 | if (ret < 0) | |
166 | return ret; | |
167 | ||
168 | /* 1 = output, but gpiolib semantics are inverse so invert */ | |
169 | ret = !(ret & d_msk); | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
e9d35947 DB |
174 | static int twl4030_set_gpio_dataout(int gpio, int enable) |
175 | { | |
176 | u8 d_bnk = gpio >> 3; | |
177 | u8 d_msk = BIT(gpio & 0x7); | |
178 | u8 base = 0; | |
179 | ||
180 | if (enable) | |
181 | base = REG_SETGPIODATAOUT1 + d_bnk; | |
182 | else | |
183 | base = REG_CLEARGPIODATAOUT1 + d_bnk; | |
184 | ||
185 | return gpio_twl4030_write(base, d_msk); | |
186 | } | |
187 | ||
188 | static int twl4030_get_gpio_datain(int gpio) | |
189 | { | |
190 | u8 d_bnk = gpio >> 3; | |
191 | u8 d_off = gpio & 0x7; | |
192 | u8 base = 0; | |
193 | int ret = 0; | |
194 | ||
e9d35947 DB |
195 | base = REG_GPIODATAIN1 + d_bnk; |
196 | ret = gpio_twl4030_read(base); | |
197 | if (ret > 0) | |
198 | ret = (ret >> d_off) & 0x1; | |
199 | ||
200 | return ret; | |
201 | } | |
202 | ||
e9d35947 DB |
203 | /*----------------------------------------------------------------------*/ |
204 | ||
205 | static int twl_request(struct gpio_chip *chip, unsigned offset) | |
206 | { | |
231a8680 | 207 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
e9d35947 DB |
208 | int status = 0; |
209 | ||
c111feab | 210 | mutex_lock(&priv->mutex); |
e9d35947 DB |
211 | |
212 | /* Support the two LED outputs as output-only GPIOs. */ | |
213 | if (offset >= TWL4030_GPIO_MAX) { | |
214 | u8 ledclr_mask = LEDEN_LEDAON | LEDEN_LEDAEXT | |
215 | | LEDEN_LEDAPWM | LEDEN_PWM_LENGTHA; | |
9859eb99 | 216 | u8 reg = TWL4030_PWMAON_REG; |
e9d35947 DB |
217 | |
218 | offset -= TWL4030_GPIO_MAX; | |
219 | if (offset) { | |
220 | ledclr_mask <<= 1; | |
9859eb99 | 221 | reg = TWL4030_PWMBON_REG; |
e9d35947 DB |
222 | } |
223 | ||
224 | /* initialize PWM to always-drive */ | |
9859eb99 PU |
225 | /* Configure PWM OFF register first */ |
226 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg + 1); | |
e9d35947 DB |
227 | if (status < 0) |
228 | goto done; | |
9859eb99 PU |
229 | |
230 | /* Followed by PWM ON register */ | |
231 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg); | |
e9d35947 DB |
232 | if (status < 0) |
233 | goto done; | |
234 | ||
235 | /* init LED to not-driven (high) */ | |
9859eb99 PU |
236 | status = twl_i2c_read_u8(TWL4030_MODULE_LED, &cached_leden, |
237 | TWL4030_LED_LEDEN_REG); | |
e9d35947 DB |
238 | if (status < 0) |
239 | goto done; | |
240 | cached_leden &= ~ledclr_mask; | |
9859eb99 PU |
241 | status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, |
242 | TWL4030_LED_LEDEN_REG); | |
e9d35947 DB |
243 | if (status < 0) |
244 | goto done; | |
245 | ||
246 | status = 0; | |
247 | goto done; | |
248 | } | |
249 | ||
250 | /* on first use, turn GPIO module "on" */ | |
72c7901e | 251 | if (!priv->usage_count) { |
e9d35947 DB |
252 | struct twl4030_gpio_platform_data *pdata; |
253 | u8 value = MASK_GPIO_CTRL_GPIO_ON; | |
254 | ||
255 | /* optionally have the first two GPIOs switch vMMC1 | |
256 | * and vMMC2 power supplies based on card presence. | |
257 | */ | |
58383c78 | 258 | pdata = dev_get_platdata(chip->parent); |
b8589e2a BC |
259 | if (pdata) |
260 | value |= pdata->mmc_cd & 0x03; | |
e9d35947 DB |
261 | |
262 | status = gpio_twl4030_write(REG_GPIO_CTRL, value); | |
263 | } | |
264 | ||
72c7901e | 265 | done: |
e9d35947 | 266 | if (!status) |
72c7901e | 267 | priv->usage_count |= BIT(offset); |
e9d35947 | 268 | |
c111feab | 269 | mutex_unlock(&priv->mutex); |
e9d35947 DB |
270 | return status; |
271 | } | |
272 | ||
273 | static void twl_free(struct gpio_chip *chip, unsigned offset) | |
274 | { | |
231a8680 | 275 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
72c7901e | 276 | |
c111feab | 277 | mutex_lock(&priv->mutex); |
e9d35947 DB |
278 | if (offset >= TWL4030_GPIO_MAX) { |
279 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, 1); | |
c111feab | 280 | goto out; |
e9d35947 DB |
281 | } |
282 | ||
72c7901e | 283 | priv->usage_count &= ~BIT(offset); |
e9d35947 DB |
284 | |
285 | /* on last use, switch off GPIO module */ | |
72c7901e | 286 | if (!priv->usage_count) |
e9d35947 DB |
287 | gpio_twl4030_write(REG_GPIO_CTRL, 0x0); |
288 | ||
c111feab PU |
289 | out: |
290 | mutex_unlock(&priv->mutex); | |
e9d35947 DB |
291 | } |
292 | ||
293 | static int twl_direction_in(struct gpio_chip *chip, unsigned offset) | |
294 | { | |
231a8680 | 295 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
c111feab PU |
296 | int ret; |
297 | ||
298 | mutex_lock(&priv->mutex); | |
299 | if (offset < TWL4030_GPIO_MAX) | |
300 | ret = twl4030_set_gpio_direction(offset, 1); | |
301 | else | |
f5837ec1 | 302 | ret = -EINVAL; /* LED outputs can't be set as input */ |
c111feab PU |
303 | |
304 | if (!ret) | |
305 | priv->direction &= ~BIT(offset); | |
306 | ||
307 | mutex_unlock(&priv->mutex); | |
308 | ||
309 | return ret; | |
e9d35947 DB |
310 | } |
311 | ||
312 | static int twl_get(struct gpio_chip *chip, unsigned offset) | |
313 | { | |
231a8680 | 314 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
c111feab | 315 | int ret; |
e9d35947 DB |
316 | int status = 0; |
317 | ||
c111feab PU |
318 | mutex_lock(&priv->mutex); |
319 | if (!(priv->usage_count & BIT(offset))) { | |
320 | ret = -EPERM; | |
321 | goto out; | |
322 | } | |
72c7901e | 323 | |
c111feab PU |
324 | if (priv->direction & BIT(offset)) |
325 | status = priv->out_state & BIT(offset); | |
e9d35947 | 326 | else |
c111feab | 327 | status = twl4030_get_gpio_datain(offset); |
72c7901e | 328 | |
9e8014fc | 329 | ret = (status < 0) ? status : !!status; |
c111feab PU |
330 | out: |
331 | mutex_unlock(&priv->mutex); | |
332 | return ret; | |
e9d35947 DB |
333 | } |
334 | ||
c111feab | 335 | static void twl_set(struct gpio_chip *chip, unsigned offset, int value) |
e9d35947 | 336 | { |
231a8680 | 337 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
c111feab PU |
338 | |
339 | mutex_lock(&priv->mutex); | |
340 | if (offset < TWL4030_GPIO_MAX) | |
e9d35947 | 341 | twl4030_set_gpio_dataout(offset, value); |
c111feab | 342 | else |
e9d35947 | 343 | twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value); |
c111feab PU |
344 | |
345 | if (value) | |
346 | priv->out_state |= BIT(offset); | |
347 | else | |
348 | priv->out_state &= ~BIT(offset); | |
349 | ||
350 | mutex_unlock(&priv->mutex); | |
e9d35947 DB |
351 | } |
352 | ||
c111feab | 353 | static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value) |
e9d35947 | 354 | { |
231a8680 | 355 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
f5837ec1 | 356 | int ret = 0; |
c111feab PU |
357 | |
358 | mutex_lock(&priv->mutex); | |
f5837ec1 | 359 | if (offset < TWL4030_GPIO_MAX) { |
0b2aa8be | 360 | ret = twl4030_set_gpio_direction(offset, 0); |
f5837ec1 RQ |
361 | if (ret) { |
362 | mutex_unlock(&priv->mutex); | |
363 | return ret; | |
364 | } | |
365 | } | |
366 | ||
367 | /* | |
368 | * LED gpios i.e. offset >= TWL4030_GPIO_MAX are always output | |
369 | */ | |
c111feab PU |
370 | |
371 | priv->direction |= BIT(offset); | |
372 | mutex_unlock(&priv->mutex); | |
373 | ||
374 | twl_set(chip, offset, value); | |
375 | ||
0b2aa8be | 376 | return ret; |
e9d35947 DB |
377 | } |
378 | ||
ab8c1e82 LW |
379 | static int twl_get_direction(struct gpio_chip *chip, unsigned offset) |
380 | { | |
381 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); | |
382 | /* | |
383 | * Default 0 = output | |
384 | * LED GPIOs >= TWL4030_GPIO_MAX are always output | |
385 | */ | |
386 | int ret = 0; | |
387 | ||
388 | mutex_lock(&priv->mutex); | |
389 | if (offset < TWL4030_GPIO_MAX) { | |
390 | ret = twl4030_get_gpio_direction(offset); | |
391 | if (ret) { | |
392 | mutex_unlock(&priv->mutex); | |
393 | return ret; | |
394 | } | |
395 | } | |
396 | mutex_unlock(&priv->mutex); | |
397 | ||
398 | return ret; | |
399 | } | |
400 | ||
e9d35947 DB |
401 | static int twl_to_irq(struct gpio_chip *chip, unsigned offset) |
402 | { | |
231a8680 | 403 | struct gpio_twl4030_priv *priv = gpiochip_get_data(chip); |
72c7901e PU |
404 | |
405 | return (priv->irq_base && (offset < TWL4030_GPIO_MAX)) | |
406 | ? (priv->irq_base + offset) | |
e9d35947 DB |
407 | : -EINVAL; |
408 | } | |
409 | ||
e35b5ab0 | 410 | static const struct gpio_chip template_chip = { |
e9d35947 DB |
411 | .label = "twl4030", |
412 | .owner = THIS_MODULE, | |
413 | .request = twl_request, | |
414 | .free = twl_free, | |
415 | .direction_input = twl_direction_in, | |
e9d35947 | 416 | .direction_output = twl_direction_out, |
ab8c1e82 LW |
417 | .get_direction = twl_get_direction, |
418 | .get = twl_get, | |
e9d35947 DB |
419 | .set = twl_set, |
420 | .to_irq = twl_to_irq, | |
9fb1f39e | 421 | .can_sleep = true, |
e9d35947 DB |
422 | }; |
423 | ||
424 | /*----------------------------------------------------------------------*/ | |
425 | ||
3836309d | 426 | static int gpio_twl4030_pulls(u32 ups, u32 downs) |
e9d35947 | 427 | { |
14591d88 | 428 | u8 message[5]; |
e9d35947 DB |
429 | unsigned i, gpio_bit; |
430 | ||
431 | /* For most pins, a pulldown was enabled by default. | |
432 | * We should have data that's specific to this board. | |
433 | */ | |
14591d88 | 434 | for (gpio_bit = 1, i = 0; i < 5; i++) { |
e9d35947 DB |
435 | u8 bit_mask; |
436 | unsigned j; | |
437 | ||
438 | for (bit_mask = 0, j = 0; j < 8; j += 2, gpio_bit <<= 1) { | |
439 | if (ups & gpio_bit) | |
440 | bit_mask |= 1 << (j + 1); | |
441 | else if (downs & gpio_bit) | |
442 | bit_mask |= 1 << (j + 0); | |
443 | } | |
444 | message[i] = bit_mask; | |
445 | } | |
446 | ||
fc7b92fc | 447 | return twl_i2c_write(TWL4030_MODULE_GPIO, message, |
e9d35947 DB |
448 | REG_GPIOPUPDCTR1, 5); |
449 | } | |
450 | ||
3836309d | 451 | static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) |
cabb3fc4 | 452 | { |
14591d88 | 453 | u8 message[3]; |
cabb3fc4 DB |
454 | |
455 | /* 30 msec of debouncing is always used for MMC card detect, | |
456 | * and is optional for everything else. | |
457 | */ | |
14591d88 | 458 | message[0] = (debounce & 0xff) | (mmc_cd & 0x03); |
cabb3fc4 | 459 | debounce >>= 8; |
14591d88 | 460 | message[1] = (debounce & 0xff); |
cabb3fc4 | 461 | debounce >>= 8; |
14591d88 | 462 | message[2] = (debounce & 0x03); |
cabb3fc4 | 463 | |
fc7b92fc | 464 | return twl_i2c_write(TWL4030_MODULE_GPIO, message, |
cabb3fc4 DB |
465 | REG_GPIO_DEBEN1, 3); |
466 | } | |
467 | ||
e9d35947 DB |
468 | static int gpio_twl4030_remove(struct platform_device *pdev); |
469 | ||
fd3a5d5b TL |
470 | static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev, |
471 | struct twl4030_gpio_platform_data *pdata) | |
f74ce8fb FV |
472 | { |
473 | struct twl4030_gpio_platform_data *omap_twl_info; | |
474 | ||
475 | omap_twl_info = devm_kzalloc(dev, sizeof(*omap_twl_info), GFP_KERNEL); | |
476 | if (!omap_twl_info) | |
477 | return NULL; | |
478 | ||
fd3a5d5b TL |
479 | if (pdata) |
480 | *omap_twl_info = *pdata; | |
481 | ||
f74ce8fb FV |
482 | omap_twl_info->use_leds = of_property_read_bool(dev->of_node, |
483 | "ti,use-leds"); | |
484 | ||
485 | of_property_read_u32(dev->of_node, "ti,debounce", | |
486 | &omap_twl_info->debounce); | |
487 | of_property_read_u32(dev->of_node, "ti,mmc-cd", | |
488 | (u32 *)&omap_twl_info->mmc_cd); | |
489 | of_property_read_u32(dev->of_node, "ti,pullups", | |
490 | &omap_twl_info->pullups); | |
491 | of_property_read_u32(dev->of_node, "ti,pulldowns", | |
492 | &omap_twl_info->pulldowns); | |
493 | ||
494 | return omap_twl_info; | |
495 | } | |
496 | ||
3836309d | 497 | static int gpio_twl4030_probe(struct platform_device *pdev) |
e9d35947 | 498 | { |
e56aee18 | 499 | struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); |
b8589e2a | 500 | struct device_node *node = pdev->dev.of_node; |
72c7901e | 501 | struct gpio_twl4030_priv *priv; |
2d9dd99b | 502 | int ret, irq_base; |
e9d35947 | 503 | |
72c7901e PU |
504 | priv = devm_kzalloc(&pdev->dev, sizeof(struct gpio_twl4030_priv), |
505 | GFP_KERNEL); | |
506 | if (!priv) | |
507 | return -ENOMEM; | |
508 | ||
e9d35947 | 509 | /* maybe setup IRQs */ |
2d9dd99b BC |
510 | if (is_module()) { |
511 | dev_err(&pdev->dev, "can't dispatch IRQs from modules\n"); | |
512 | goto no_irqs; | |
513 | } | |
514 | ||
9bc81137 BG |
515 | irq_base = devm_irq_alloc_descs(&pdev->dev, -1, |
516 | 0, TWL4030_GPIO_MAX, 0); | |
2d9dd99b BC |
517 | if (irq_base < 0) { |
518 | dev_err(&pdev->dev, "Failed to alloc irq_descs\n"); | |
519 | return irq_base; | |
e9d35947 DB |
520 | } |
521 | ||
b8589e2a BC |
522 | irq_domain_add_legacy(node, TWL4030_GPIO_MAX, irq_base, 0, |
523 | &irq_domain_simple_ops, NULL); | |
524 | ||
2d9dd99b BC |
525 | ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO, irq_base); |
526 | if (ret < 0) | |
527 | return ret; | |
528 | ||
72c7901e | 529 | priv->irq_base = irq_base; |
2d9dd99b | 530 | |
e9d35947 | 531 | no_irqs: |
72c7901e PU |
532 | priv->gpio_chip = template_chip; |
533 | priv->gpio_chip.base = -1; | |
534 | priv->gpio_chip.ngpio = TWL4030_GPIO_MAX; | |
58383c78 | 535 | priv->gpio_chip.parent = &pdev->dev; |
e9d35947 | 536 | |
c111feab PU |
537 | mutex_init(&priv->mutex); |
538 | ||
f74ce8fb | 539 | if (node) |
fd3a5d5b | 540 | pdata = of_gpio_twl4030(&pdev->dev, pdata); |
b8589e2a | 541 | |
f74ce8fb FV |
542 | if (pdata == NULL) { |
543 | dev_err(&pdev->dev, "Platform data is missing\n"); | |
544 | return -ENXIO; | |
b8589e2a | 545 | } |
e9d35947 | 546 | |
f74ce8fb FV |
547 | /* |
548 | * NOTE: boards may waste power if they don't set pullups | |
549 | * and pulldowns correctly ... default for non-ULPI pins is | |
550 | * pulldown, and some other pins may have external pullups | |
551 | * or pulldowns. Careful! | |
552 | */ | |
553 | ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns); | |
554 | if (ret) | |
555 | dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n", | |
556 | pdata->pullups, pdata->pulldowns, ret); | |
557 | ||
558 | ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd); | |
559 | if (ret) | |
560 | dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n", | |
561 | pdata->debounce, pdata->mmc_cd, ret); | |
562 | ||
563 | /* | |
564 | * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE, | |
565 | * is (still) clear if use_leds is set. | |
566 | */ | |
567 | if (pdata->use_leds) | |
72c7901e | 568 | priv->gpio_chip.ngpio += 2; |
f74ce8fb | 569 | |
231a8680 | 570 | ret = gpiochip_add_data(&priv->gpio_chip, priv); |
e9d35947 | 571 | if (ret < 0) { |
2d9dd99b | 572 | dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret); |
72c7901e | 573 | priv->gpio_chip.ngpio = 0; |
e9d35947 | 574 | gpio_twl4030_remove(pdev); |
a940d9a1 TL |
575 | goto out; |
576 | } | |
577 | ||
72c7901e | 578 | platform_set_drvdata(pdev, priv); |
a940d9a1 | 579 | |
fe5e23d3 | 580 | if (pdata->setup) { |
e9d35947 DB |
581 | int status; |
582 | ||
72c7901e PU |
583 | status = pdata->setup(&pdev->dev, priv->gpio_chip.base, |
584 | TWL4030_GPIO_MAX); | |
e9d35947 DB |
585 | if (status) |
586 | dev_dbg(&pdev->dev, "setup --> %d\n", status); | |
587 | } | |
588 | ||
a940d9a1 | 589 | out: |
e9d35947 DB |
590 | return ret; |
591 | } | |
592 | ||
206210ce | 593 | /* Cannot use as gpio_twl4030_probe() calls us */ |
46c529cf | 594 | static int gpio_twl4030_remove(struct platform_device *pdev) |
e9d35947 | 595 | { |
e56aee18 | 596 | struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); |
72c7901e | 597 | struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev); |
e9d35947 DB |
598 | int status; |
599 | ||
b8589e2a | 600 | if (pdata && pdata->teardown) { |
72c7901e PU |
601 | status = pdata->teardown(&pdev->dev, priv->gpio_chip.base, |
602 | TWL4030_GPIO_MAX); | |
e9d35947 DB |
603 | if (status) { |
604 | dev_dbg(&pdev->dev, "teardown --> %d\n", status); | |
605 | return status; | |
606 | } | |
607 | } | |
608 | ||
9f5132ae | 609 | gpiochip_remove(&priv->gpio_chip); |
e9d35947 DB |
610 | |
611 | if (is_module()) | |
612 | return 0; | |
613 | ||
614 | /* REVISIT no support yet for deregistering all the IRQs */ | |
615 | WARN_ON(1); | |
616 | return -EIO; | |
617 | } | |
618 | ||
b8589e2a BC |
619 | static const struct of_device_id twl_gpio_match[] = { |
620 | { .compatible = "ti,twl4030-gpio", }, | |
621 | { }, | |
622 | }; | |
623 | MODULE_DEVICE_TABLE(of, twl_gpio_match); | |
624 | ||
e9d35947 DB |
625 | /* Note: this hardware lives inside an I2C-based multi-function device. */ |
626 | MODULE_ALIAS("platform:twl4030_gpio"); | |
627 | ||
628 | static struct platform_driver gpio_twl4030_driver = { | |
b8589e2a BC |
629 | .driver = { |
630 | .name = "twl4030_gpio", | |
e5560af4 | 631 | .of_match_table = twl_gpio_match, |
b8589e2a | 632 | }, |
e9d35947 | 633 | .probe = gpio_twl4030_probe, |
46c529cf | 634 | .remove = gpio_twl4030_remove, |
e9d35947 DB |
635 | }; |
636 | ||
637 | static int __init gpio_twl4030_init(void) | |
638 | { | |
639 | return platform_driver_register(&gpio_twl4030_driver); | |
640 | } | |
641 | subsys_initcall(gpio_twl4030_init); | |
642 | ||
643 | static void __exit gpio_twl4030_exit(void) | |
644 | { | |
645 | platform_driver_unregister(&gpio_twl4030_driver); | |
646 | } | |
647 | module_exit(gpio_twl4030_exit); | |
648 | ||
649 | MODULE_AUTHOR("Texas Instruments, Inc."); | |
650 | MODULE_DESCRIPTION("GPIO interface for TWL4030"); | |
651 | MODULE_LICENSE("GPL"); |