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eadff302 II |
1 | /* |
2 | * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 and | |
6 | * only version 2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | */ | |
13 | ||
1c5fb66a | 14 | #include <linux/gpio/driver.h> |
eadff302 II |
15 | #include <linux/module.h> |
16 | #include <linux/of.h> | |
ab4256cf | 17 | #include <linux/of_irq.h> |
eadff302 II |
18 | #include <linux/pinctrl/pinconf-generic.h> |
19 | #include <linux/pinctrl/pinconf.h> | |
20 | #include <linux/pinctrl/pinmux.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/types.h> | |
25 | ||
26 | #include <dt-bindings/pinctrl/qcom,pmic-gpio.h> | |
27 | ||
28 | #include "../core.h" | |
29 | #include "../pinctrl-utils.h" | |
30 | ||
31 | #define PMIC_GPIO_ADDRESS_RANGE 0x100 | |
32 | ||
33 | /* type and subtype registers base address offsets */ | |
34 | #define PMIC_GPIO_REG_TYPE 0x4 | |
35 | #define PMIC_GPIO_REG_SUBTYPE 0x5 | |
36 | ||
37 | /* GPIO peripheral type and subtype out_values */ | |
38 | #define PMIC_GPIO_TYPE 0x10 | |
39 | #define PMIC_GPIO_SUBTYPE_GPIO_4CH 0x1 | |
40 | #define PMIC_GPIO_SUBTYPE_GPIOC_4CH 0x5 | |
41 | #define PMIC_GPIO_SUBTYPE_GPIO_8CH 0x9 | |
42 | #define PMIC_GPIO_SUBTYPE_GPIOC_8CH 0xd | |
d7b5f5cc FW |
43 | #define PMIC_GPIO_SUBTYPE_GPIO_LV 0x10 |
44 | #define PMIC_GPIO_SUBTYPE_GPIO_MV 0x11 | |
eadff302 II |
45 | |
46 | #define PMIC_MPP_REG_RT_STS 0x10 | |
47 | #define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1 | |
48 | ||
49 | /* control register base address offsets */ | |
50 | #define PMIC_GPIO_REG_MODE_CTL 0x40 | |
51 | #define PMIC_GPIO_REG_DIG_VIN_CTL 0x41 | |
52 | #define PMIC_GPIO_REG_DIG_PULL_CTL 0x42 | |
d7b5f5cc | 53 | #define PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL 0x44 |
223463fc | 54 | #define PMIC_GPIO_REG_DIG_IN_CTL 0x43 |
eadff302 II |
55 | #define PMIC_GPIO_REG_DIG_OUT_CTL 0x45 |
56 | #define PMIC_GPIO_REG_EN_CTL 0x46 | |
d7b5f5cc | 57 | #define PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL 0x4A |
eadff302 II |
58 | |
59 | /* PMIC_GPIO_REG_MODE_CTL */ | |
60 | #define PMIC_GPIO_REG_MODE_VALUE_SHIFT 0x1 | |
61 | #define PMIC_GPIO_REG_MODE_FUNCTION_SHIFT 1 | |
62 | #define PMIC_GPIO_REG_MODE_FUNCTION_MASK 0x7 | |
63 | #define PMIC_GPIO_REG_MODE_DIR_SHIFT 4 | |
64 | #define PMIC_GPIO_REG_MODE_DIR_MASK 0x7 | |
65 | ||
d7b5f5cc FW |
66 | #define PMIC_GPIO_MODE_DIGITAL_INPUT 0 |
67 | #define PMIC_GPIO_MODE_DIGITAL_OUTPUT 1 | |
68 | #define PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT 2 | |
69 | #define PMIC_GPIO_MODE_ANALOG_PASS_THRU 3 | |
70 | #define PMIC_GPIO_REG_LV_MV_MODE_DIR_MASK 0x3 | |
71 | ||
eadff302 II |
72 | /* PMIC_GPIO_REG_DIG_VIN_CTL */ |
73 | #define PMIC_GPIO_REG_VIN_SHIFT 0 | |
74 | #define PMIC_GPIO_REG_VIN_MASK 0x7 | |
75 | ||
76 | /* PMIC_GPIO_REG_DIG_PULL_CTL */ | |
77 | #define PMIC_GPIO_REG_PULL_SHIFT 0 | |
78 | #define PMIC_GPIO_REG_PULL_MASK 0x7 | |
79 | ||
80 | #define PMIC_GPIO_PULL_DOWN 4 | |
81 | #define PMIC_GPIO_PULL_DISABLE 5 | |
82 | ||
d7b5f5cc FW |
83 | /* PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL for LV/MV */ |
84 | #define PMIC_GPIO_LV_MV_OUTPUT_INVERT 0x80 | |
85 | #define PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT 7 | |
86 | #define PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK 0xF | |
87 | ||
223463fc FW |
88 | /* PMIC_GPIO_REG_DIG_IN_CTL */ |
89 | #define PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN 0x80 | |
90 | #define PMIC_GPIO_LV_MV_DIG_IN_DTEST_SEL_MASK 0x7 | |
91 | #define PMIC_GPIO_DIG_IN_DTEST_SEL_MASK 0xf | |
92 | ||
eadff302 II |
93 | /* PMIC_GPIO_REG_DIG_OUT_CTL */ |
94 | #define PMIC_GPIO_REG_OUT_STRENGTH_SHIFT 0 | |
95 | #define PMIC_GPIO_REG_OUT_STRENGTH_MASK 0x3 | |
96 | #define PMIC_GPIO_REG_OUT_TYPE_SHIFT 4 | |
97 | #define PMIC_GPIO_REG_OUT_TYPE_MASK 0x3 | |
98 | ||
99 | /* | |
100 | * Output type - indicates pin should be configured as push-pull, | |
101 | * open drain or open source. | |
102 | */ | |
103 | #define PMIC_GPIO_OUT_BUF_CMOS 0 | |
104 | #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS 1 | |
105 | #define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS 2 | |
106 | ||
107 | /* PMIC_GPIO_REG_EN_CTL */ | |
108 | #define PMIC_GPIO_REG_MASTER_EN_SHIFT 7 | |
109 | ||
110 | #define PMIC_GPIO_PHYSICAL_OFFSET 1 | |
111 | ||
d7b5f5cc FW |
112 | /* PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL */ |
113 | #define PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK 0x3 | |
114 | ||
eadff302 II |
115 | /* Qualcomm specific pin configurations */ |
116 | #define PMIC_GPIO_CONF_PULL_UP (PIN_CONFIG_END + 1) | |
117 | #define PMIC_GPIO_CONF_STRENGTH (PIN_CONFIG_END + 2) | |
d7b5f5cc FW |
118 | #define PMIC_GPIO_CONF_ATEST (PIN_CONFIG_END + 3) |
119 | #define PMIC_GPIO_CONF_ANALOG_PASS (PIN_CONFIG_END + 4) | |
223463fc | 120 | #define PMIC_GPIO_CONF_DTEST_BUFFER (PIN_CONFIG_END + 5) |
d7b5f5cc FW |
121 | |
122 | /* The index of each function in pmic_gpio_functions[] array */ | |
123 | enum pmic_gpio_func_index { | |
124 | PMIC_GPIO_FUNC_INDEX_NORMAL, | |
125 | PMIC_GPIO_FUNC_INDEX_PAIRED, | |
126 | PMIC_GPIO_FUNC_INDEX_FUNC1, | |
127 | PMIC_GPIO_FUNC_INDEX_FUNC2, | |
128 | PMIC_GPIO_FUNC_INDEX_FUNC3, | |
129 | PMIC_GPIO_FUNC_INDEX_FUNC4, | |
130 | PMIC_GPIO_FUNC_INDEX_DTEST1, | |
131 | PMIC_GPIO_FUNC_INDEX_DTEST2, | |
132 | PMIC_GPIO_FUNC_INDEX_DTEST3, | |
133 | PMIC_GPIO_FUNC_INDEX_DTEST4, | |
134 | }; | |
eadff302 II |
135 | |
136 | /** | |
137 | * struct pmic_gpio_pad - keep current GPIO settings | |
138 | * @base: Address base in SPMI device. | |
139 | * @irq: IRQ number which this GPIO generate. | |
140 | * @is_enabled: Set to false when GPIO should be put in high Z state. | |
141 | * @out_value: Cached pin output value | |
142 | * @have_buffer: Set to true if GPIO output could be configured in push-pull, | |
143 | * open-drain or open-source mode. | |
144 | * @output_enabled: Set to true if GPIO output logic is enabled. | |
145 | * @input_enabled: Set to true if GPIO input buffer logic is enabled. | |
d7b5f5cc FW |
146 | * @analog_pass: Set to true if GPIO is in analog-pass-through mode. |
147 | * @lv_mv_type: Set to true if GPIO subtype is GPIO_LV(0x10) or GPIO_MV(0x11). | |
eadff302 II |
148 | * @num_sources: Number of power-sources supported by this GPIO. |
149 | * @power_source: Current power-source used. | |
150 | * @buffer_type: Push-pull, open-drain or open-source. | |
151 | * @pullup: Constant current which flow trough GPIO output buffer. | |
152 | * @strength: No, Low, Medium, High | |
153 | * @function: See pmic_gpio_functions[] | |
d7b5f5cc | 154 | * @atest: the ATEST selection for GPIO analog-pass-through mode |
223463fc | 155 | * @dtest_buffer: the DTEST buffer selection for digital input mode. |
eadff302 II |
156 | */ |
157 | struct pmic_gpio_pad { | |
158 | u16 base; | |
159 | int irq; | |
160 | bool is_enabled; | |
161 | bool out_value; | |
162 | bool have_buffer; | |
163 | bool output_enabled; | |
164 | bool input_enabled; | |
d7b5f5cc FW |
165 | bool analog_pass; |
166 | bool lv_mv_type; | |
eadff302 II |
167 | unsigned int num_sources; |
168 | unsigned int power_source; | |
169 | unsigned int buffer_type; | |
170 | unsigned int pullup; | |
171 | unsigned int strength; | |
172 | unsigned int function; | |
d7b5f5cc | 173 | unsigned int atest; |
223463fc | 174 | unsigned int dtest_buffer; |
eadff302 II |
175 | }; |
176 | ||
177 | struct pmic_gpio_state { | |
178 | struct device *dev; | |
179 | struct regmap *map; | |
180 | struct pinctrl_dev *ctrl; | |
181 | struct gpio_chip chip; | |
182 | }; | |
183 | ||
f684e4ac | 184 | static const struct pinconf_generic_params pmic_gpio_bindings[] = { |
7382b623 SB |
185 | {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP, 0}, |
186 | {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH, 0}, | |
d7b5f5cc FW |
187 | {"qcom,atest", PMIC_GPIO_CONF_ATEST, 0}, |
188 | {"qcom,analog-pass", PMIC_GPIO_CONF_ANALOG_PASS, 0}, | |
223463fc | 189 | {"qcom,dtest-buffer", PMIC_GPIO_CONF_DTEST_BUFFER, 0}, |
eadff302 II |
190 | }; |
191 | ||
4f06266a | 192 | #ifdef CONFIG_DEBUG_FS |
7382b623 SB |
193 | static const struct pin_config_item pmic_conf_items[ARRAY_SIZE(pmic_gpio_bindings)] = { |
194 | PCONFDUMP(PMIC_GPIO_CONF_PULL_UP, "pull up strength", NULL, true), | |
195 | PCONFDUMP(PMIC_GPIO_CONF_STRENGTH, "drive-strength", NULL, true), | |
d7b5f5cc FW |
196 | PCONFDUMP(PMIC_GPIO_CONF_ATEST, "atest", NULL, true), |
197 | PCONFDUMP(PMIC_GPIO_CONF_ANALOG_PASS, "analog-pass", NULL, true), | |
223463fc | 198 | PCONFDUMP(PMIC_GPIO_CONF_DTEST_BUFFER, "dtest-buffer", NULL, true), |
eadff302 | 199 | }; |
4f06266a | 200 | #endif |
eadff302 II |
201 | |
202 | static const char *const pmic_gpio_groups[] = { | |
203 | "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8", | |
204 | "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15", | |
205 | "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22", | |
206 | "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29", | |
207 | "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36", | |
208 | }; | |
209 | ||
210 | static const char *const pmic_gpio_functions[] = { | |
d7b5f5cc FW |
211 | [PMIC_GPIO_FUNC_INDEX_NORMAL] = PMIC_GPIO_FUNC_NORMAL, |
212 | [PMIC_GPIO_FUNC_INDEX_PAIRED] = PMIC_GPIO_FUNC_PAIRED, | |
213 | [PMIC_GPIO_FUNC_INDEX_FUNC1] = PMIC_GPIO_FUNC_FUNC1, | |
214 | [PMIC_GPIO_FUNC_INDEX_FUNC2] = PMIC_GPIO_FUNC_FUNC2, | |
215 | [PMIC_GPIO_FUNC_INDEX_FUNC3] = PMIC_GPIO_FUNC_FUNC3, | |
216 | [PMIC_GPIO_FUNC_INDEX_FUNC4] = PMIC_GPIO_FUNC_FUNC4, | |
217 | [PMIC_GPIO_FUNC_INDEX_DTEST1] = PMIC_GPIO_FUNC_DTEST1, | |
218 | [PMIC_GPIO_FUNC_INDEX_DTEST2] = PMIC_GPIO_FUNC_DTEST2, | |
219 | [PMIC_GPIO_FUNC_INDEX_DTEST3] = PMIC_GPIO_FUNC_DTEST3, | |
220 | [PMIC_GPIO_FUNC_INDEX_DTEST4] = PMIC_GPIO_FUNC_DTEST4, | |
eadff302 II |
221 | }; |
222 | ||
eadff302 II |
223 | static int pmic_gpio_read(struct pmic_gpio_state *state, |
224 | struct pmic_gpio_pad *pad, unsigned int addr) | |
225 | { | |
226 | unsigned int val; | |
227 | int ret; | |
228 | ||
229 | ret = regmap_read(state->map, pad->base + addr, &val); | |
230 | if (ret < 0) | |
231 | dev_err(state->dev, "read 0x%x failed\n", addr); | |
232 | else | |
233 | ret = val; | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | static int pmic_gpio_write(struct pmic_gpio_state *state, | |
239 | struct pmic_gpio_pad *pad, unsigned int addr, | |
240 | unsigned int val) | |
241 | { | |
242 | int ret; | |
243 | ||
244 | ret = regmap_write(state->map, pad->base + addr, val); | |
245 | if (ret < 0) | |
246 | dev_err(state->dev, "write 0x%x failed\n", addr); | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
251 | static int pmic_gpio_get_groups_count(struct pinctrl_dev *pctldev) | |
252 | { | |
253 | /* Every PIN is a group */ | |
254 | return pctldev->desc->npins; | |
255 | } | |
256 | ||
257 | static const char *pmic_gpio_get_group_name(struct pinctrl_dev *pctldev, | |
258 | unsigned pin) | |
259 | { | |
260 | return pctldev->desc->pins[pin].name; | |
261 | } | |
262 | ||
263 | static int pmic_gpio_get_group_pins(struct pinctrl_dev *pctldev, unsigned pin, | |
264 | const unsigned **pins, unsigned *num_pins) | |
265 | { | |
266 | *pins = &pctldev->desc->pins[pin].number; | |
267 | *num_pins = 1; | |
268 | return 0; | |
269 | } | |
270 | ||
eadff302 II |
271 | static const struct pinctrl_ops pmic_gpio_pinctrl_ops = { |
272 | .get_groups_count = pmic_gpio_get_groups_count, | |
273 | .get_group_name = pmic_gpio_get_group_name, | |
274 | .get_group_pins = pmic_gpio_get_group_pins, | |
7382b623 | 275 | .dt_node_to_map = pinconf_generic_dt_node_to_map_group, |
d32f7fd3 | 276 | .dt_free_map = pinctrl_utils_free_map, |
eadff302 II |
277 | }; |
278 | ||
279 | static int pmic_gpio_get_functions_count(struct pinctrl_dev *pctldev) | |
280 | { | |
281 | return ARRAY_SIZE(pmic_gpio_functions); | |
282 | } | |
283 | ||
284 | static const char *pmic_gpio_get_function_name(struct pinctrl_dev *pctldev, | |
285 | unsigned function) | |
286 | { | |
287 | return pmic_gpio_functions[function]; | |
288 | } | |
289 | ||
290 | static int pmic_gpio_get_function_groups(struct pinctrl_dev *pctldev, | |
291 | unsigned function, | |
292 | const char *const **groups, | |
293 | unsigned *const num_qgroups) | |
294 | { | |
295 | *groups = pmic_gpio_groups; | |
296 | *num_qgroups = pctldev->desc->npins; | |
297 | return 0; | |
298 | } | |
299 | ||
300 | static int pmic_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned function, | |
301 | unsigned pin) | |
302 | { | |
303 | struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); | |
304 | struct pmic_gpio_pad *pad; | |
305 | unsigned int val; | |
306 | int ret; | |
307 | ||
d7b5f5cc FW |
308 | if (function > PMIC_GPIO_FUNC_INDEX_DTEST4) { |
309 | pr_err("function: %d is not defined\n", function); | |
310 | return -EINVAL; | |
311 | } | |
312 | ||
eadff302 | 313 | pad = pctldev->desc->pins[pin].drv_data; |
d7b5f5cc FW |
314 | /* |
315 | * Non-LV/MV subtypes only support 2 special functions, | |
316 | * offsetting the dtestx function values by 2 | |
317 | */ | |
318 | if (!pad->lv_mv_type) { | |
319 | if (function == PMIC_GPIO_FUNC_INDEX_FUNC3 || | |
320 | function == PMIC_GPIO_FUNC_INDEX_FUNC4) { | |
321 | pr_err("LV/MV subtype doesn't have func3/func4\n"); | |
322 | return -EINVAL; | |
323 | } | |
324 | if (function >= PMIC_GPIO_FUNC_INDEX_DTEST1) | |
325 | function -= (PMIC_GPIO_FUNC_INDEX_DTEST1 - | |
326 | PMIC_GPIO_FUNC_INDEX_FUNC3); | |
327 | } | |
eadff302 II |
328 | |
329 | pad->function = function; | |
330 | ||
d7b5f5cc FW |
331 | if (pad->analog_pass) |
332 | val = PMIC_GPIO_MODE_ANALOG_PASS_THRU; | |
333 | else if (pad->output_enabled && pad->input_enabled) | |
334 | val = PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT; | |
335 | else if (pad->output_enabled) | |
336 | val = PMIC_GPIO_MODE_DIGITAL_OUTPUT; | |
337 | else | |
338 | val = PMIC_GPIO_MODE_DIGITAL_INPUT; | |
eadff302 | 339 | |
d7b5f5cc FW |
340 | if (pad->lv_mv_type) { |
341 | ret = pmic_gpio_write(state, pad, | |
342 | PMIC_GPIO_REG_MODE_CTL, val); | |
343 | if (ret < 0) | |
344 | return ret; | |
eadff302 | 345 | |
d7b5f5cc FW |
346 | val = pad->atest - 1; |
347 | ret = pmic_gpio_write(state, pad, | |
348 | PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL, val); | |
349 | if (ret < 0) | |
350 | return ret; | |
351 | ||
352 | val = pad->out_value | |
353 | << PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT; | |
354 | val |= pad->function | |
355 | & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK; | |
356 | ret = pmic_gpio_write(state, pad, | |
357 | PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL, val); | |
358 | if (ret < 0) | |
359 | return ret; | |
360 | } else { | |
361 | val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT; | |
362 | val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; | |
363 | val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT; | |
364 | ||
365 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); | |
366 | if (ret < 0) | |
367 | return ret; | |
368 | } | |
eadff302 II |
369 | |
370 | val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT; | |
371 | ||
372 | return pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val); | |
373 | } | |
374 | ||
375 | static const struct pinmux_ops pmic_gpio_pinmux_ops = { | |
376 | .get_functions_count = pmic_gpio_get_functions_count, | |
377 | .get_function_name = pmic_gpio_get_function_name, | |
378 | .get_function_groups = pmic_gpio_get_function_groups, | |
379 | .set_mux = pmic_gpio_set_mux, | |
380 | }; | |
381 | ||
382 | static int pmic_gpio_config_get(struct pinctrl_dev *pctldev, | |
383 | unsigned int pin, unsigned long *config) | |
384 | { | |
385 | unsigned param = pinconf_to_config_param(*config); | |
386 | struct pmic_gpio_pad *pad; | |
387 | unsigned arg; | |
388 | ||
389 | pad = pctldev->desc->pins[pin].drv_data; | |
390 | ||
391 | switch (param) { | |
392 | case PIN_CONFIG_DRIVE_PUSH_PULL: | |
1cf86bc2 DA |
393 | if (pad->buffer_type != PMIC_GPIO_OUT_BUF_CMOS) |
394 | return -EINVAL; | |
395 | arg = 1; | |
eadff302 II |
396 | break; |
397 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
1cf86bc2 DA |
398 | if (pad->buffer_type != PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS) |
399 | return -EINVAL; | |
400 | arg = 1; | |
eadff302 II |
401 | break; |
402 | case PIN_CONFIG_DRIVE_OPEN_SOURCE: | |
1cf86bc2 DA |
403 | if (pad->buffer_type != PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS) |
404 | return -EINVAL; | |
405 | arg = 1; | |
eadff302 II |
406 | break; |
407 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
1cf86bc2 DA |
408 | if (pad->pullup != PMIC_GPIO_PULL_DOWN) |
409 | return -EINVAL; | |
410 | arg = 1; | |
eadff302 II |
411 | break; |
412 | case PIN_CONFIG_BIAS_DISABLE: | |
1cf86bc2 DA |
413 | if (pad->pullup != PMIC_GPIO_PULL_DISABLE) |
414 | return -EINVAL; | |
415 | arg = 1; | |
eadff302 II |
416 | break; |
417 | case PIN_CONFIG_BIAS_PULL_UP: | |
1cf86bc2 DA |
418 | if (pad->pullup != PMIC_GPIO_PULL_UP_30) |
419 | return -EINVAL; | |
420 | arg = 1; | |
eadff302 II |
421 | break; |
422 | case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: | |
1cf86bc2 DA |
423 | if (pad->is_enabled) |
424 | return -EINVAL; | |
425 | arg = 1; | |
eadff302 II |
426 | break; |
427 | case PIN_CONFIG_POWER_SOURCE: | |
428 | arg = pad->power_source; | |
429 | break; | |
430 | case PIN_CONFIG_INPUT_ENABLE: | |
1cf86bc2 DA |
431 | if (!pad->input_enabled) |
432 | return -EINVAL; | |
433 | arg = 1; | |
eadff302 II |
434 | break; |
435 | case PIN_CONFIG_OUTPUT: | |
436 | arg = pad->out_value; | |
437 | break; | |
438 | case PMIC_GPIO_CONF_PULL_UP: | |
439 | arg = pad->pullup; | |
440 | break; | |
441 | case PMIC_GPIO_CONF_STRENGTH: | |
442 | arg = pad->strength; | |
443 | break; | |
d7b5f5cc FW |
444 | case PMIC_GPIO_CONF_ATEST: |
445 | arg = pad->atest; | |
446 | break; | |
447 | case PMIC_GPIO_CONF_ANALOG_PASS: | |
448 | arg = pad->analog_pass; | |
449 | break; | |
223463fc FW |
450 | case PMIC_GPIO_CONF_DTEST_BUFFER: |
451 | arg = pad->dtest_buffer; | |
452 | break; | |
eadff302 II |
453 | default: |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | *config = pinconf_to_config_packed(param, arg); | |
458 | return 0; | |
459 | } | |
460 | ||
461 | static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin, | |
462 | unsigned long *configs, unsigned nconfs) | |
463 | { | |
464 | struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); | |
465 | struct pmic_gpio_pad *pad; | |
466 | unsigned param, arg; | |
467 | unsigned int val; | |
468 | int i, ret; | |
469 | ||
470 | pad = pctldev->desc->pins[pin].drv_data; | |
471 | ||
6cb74f44 | 472 | pad->is_enabled = true; |
eadff302 II |
473 | for (i = 0; i < nconfs; i++) { |
474 | param = pinconf_to_config_param(configs[i]); | |
475 | arg = pinconf_to_config_argument(configs[i]); | |
476 | ||
477 | switch (param) { | |
478 | case PIN_CONFIG_DRIVE_PUSH_PULL: | |
479 | pad->buffer_type = PMIC_GPIO_OUT_BUF_CMOS; | |
480 | break; | |
481 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
482 | if (!pad->have_buffer) | |
483 | return -EINVAL; | |
484 | pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS; | |
485 | break; | |
486 | case PIN_CONFIG_DRIVE_OPEN_SOURCE: | |
487 | if (!pad->have_buffer) | |
488 | return -EINVAL; | |
489 | pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS; | |
490 | break; | |
491 | case PIN_CONFIG_BIAS_DISABLE: | |
492 | pad->pullup = PMIC_GPIO_PULL_DISABLE; | |
493 | break; | |
494 | case PIN_CONFIG_BIAS_PULL_UP: | |
495 | pad->pullup = PMIC_GPIO_PULL_UP_30; | |
496 | break; | |
497 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
498 | if (arg) | |
499 | pad->pullup = PMIC_GPIO_PULL_DOWN; | |
500 | else | |
501 | pad->pullup = PMIC_GPIO_PULL_DISABLE; | |
502 | break; | |
503 | case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: | |
504 | pad->is_enabled = false; | |
505 | break; | |
506 | case PIN_CONFIG_POWER_SOURCE: | |
4e83ac4c | 507 | if (arg >= pad->num_sources) |
eadff302 II |
508 | return -EINVAL; |
509 | pad->power_source = arg; | |
510 | break; | |
511 | case PIN_CONFIG_INPUT_ENABLE: | |
512 | pad->input_enabled = arg ? true : false; | |
513 | break; | |
514 | case PIN_CONFIG_OUTPUT: | |
515 | pad->output_enabled = true; | |
516 | pad->out_value = arg; | |
517 | break; | |
518 | case PMIC_GPIO_CONF_PULL_UP: | |
519 | if (arg > PMIC_GPIO_PULL_UP_1P5_30) | |
520 | return -EINVAL; | |
521 | pad->pullup = arg; | |
522 | break; | |
523 | case PMIC_GPIO_CONF_STRENGTH: | |
524 | if (arg > PMIC_GPIO_STRENGTH_LOW) | |
525 | return -EINVAL; | |
526 | pad->strength = arg; | |
527 | break; | |
d7b5f5cc FW |
528 | case PMIC_GPIO_CONF_ATEST: |
529 | if (!pad->lv_mv_type || arg > 4) | |
530 | return -EINVAL; | |
531 | pad->atest = arg; | |
532 | break; | |
533 | case PMIC_GPIO_CONF_ANALOG_PASS: | |
534 | if (!pad->lv_mv_type) | |
535 | return -EINVAL; | |
536 | pad->analog_pass = true; | |
537 | break; | |
223463fc FW |
538 | case PMIC_GPIO_CONF_DTEST_BUFFER: |
539 | if (arg > 4) | |
540 | return -EINVAL; | |
541 | pad->dtest_buffer = arg; | |
542 | break; | |
eadff302 II |
543 | default: |
544 | return -EINVAL; | |
545 | } | |
546 | } | |
547 | ||
548 | val = pad->power_source << PMIC_GPIO_REG_VIN_SHIFT; | |
549 | ||
550 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL, val); | |
551 | if (ret < 0) | |
552 | return ret; | |
553 | ||
554 | val = pad->pullup << PMIC_GPIO_REG_PULL_SHIFT; | |
555 | ||
556 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL, val); | |
557 | if (ret < 0) | |
558 | return ret; | |
559 | ||
560 | val = pad->buffer_type << PMIC_GPIO_REG_OUT_TYPE_SHIFT; | |
982df6ae | 561 | val |= pad->strength << PMIC_GPIO_REG_OUT_STRENGTH_SHIFT; |
eadff302 II |
562 | |
563 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL, val); | |
564 | if (ret < 0) | |
565 | return ret; | |
566 | ||
223463fc FW |
567 | if (pad->dtest_buffer == 0) { |
568 | val = 0; | |
569 | } else { | |
570 | if (pad->lv_mv_type) { | |
571 | val = pad->dtest_buffer - 1; | |
572 | val |= PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN; | |
573 | } else { | |
574 | val = BIT(pad->dtest_buffer - 1); | |
575 | } | |
576 | } | |
577 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_IN_CTL, val); | |
578 | if (ret < 0) | |
579 | return ret; | |
580 | ||
d7b5f5cc FW |
581 | if (pad->analog_pass) |
582 | val = PMIC_GPIO_MODE_ANALOG_PASS_THRU; | |
583 | else if (pad->output_enabled && pad->input_enabled) | |
584 | val = PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT; | |
585 | else if (pad->output_enabled) | |
586 | val = PMIC_GPIO_MODE_DIGITAL_OUTPUT; | |
587 | else | |
588 | val = PMIC_GPIO_MODE_DIGITAL_INPUT; | |
eadff302 | 589 | |
d7b5f5cc FW |
590 | if (pad->lv_mv_type) { |
591 | ret = pmic_gpio_write(state, pad, | |
592 | PMIC_GPIO_REG_MODE_CTL, val); | |
593 | if (ret < 0) | |
594 | return ret; | |
595 | ||
596 | val = pad->atest - 1; | |
597 | ret = pmic_gpio_write(state, pad, | |
598 | PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL, val); | |
599 | if (ret < 0) | |
600 | return ret; | |
601 | ||
602 | val = pad->out_value | |
603 | << PMIC_GPIO_LV_MV_OUTPUT_INVERT_SHIFT; | |
604 | val |= pad->function | |
605 | & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK; | |
606 | ret = pmic_gpio_write(state, pad, | |
607 | PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL, val); | |
608 | if (ret < 0) | |
609 | return ret; | |
610 | } else { | |
611 | val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT; | |
612 | val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; | |
613 | val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT; | |
eadff302 | 614 | |
d7b5f5cc FW |
615 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val); |
616 | if (ret < 0) | |
617 | return ret; | |
618 | } | |
619 | ||
6cb74f44 FW |
620 | val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT; |
621 | ||
622 | ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val); | |
623 | ||
d7b5f5cc | 624 | return ret; |
eadff302 II |
625 | } |
626 | ||
627 | static void pmic_gpio_config_dbg_show(struct pinctrl_dev *pctldev, | |
628 | struct seq_file *s, unsigned pin) | |
629 | { | |
630 | struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev); | |
631 | struct pmic_gpio_pad *pad; | |
d7b5f5cc | 632 | int ret, val, function; |
eadff302 II |
633 | |
634 | static const char *const biases[] = { | |
635 | "pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA", | |
636 | "pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull" | |
637 | }; | |
638 | static const char *const buffer_types[] = { | |
639 | "push-pull", "open-drain", "open-source" | |
640 | }; | |
641 | static const char *const strengths[] = { | |
642 | "no", "high", "medium", "low" | |
643 | }; | |
644 | ||
645 | pad = pctldev->desc->pins[pin].drv_data; | |
646 | ||
647 | seq_printf(s, " gpio%-2d:", pin + PMIC_GPIO_PHYSICAL_OFFSET); | |
648 | ||
649 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_EN_CTL); | |
650 | ||
651 | if (val < 0 || !(val >> PMIC_GPIO_REG_MASTER_EN_SHIFT)) { | |
652 | seq_puts(s, " ---"); | |
653 | } else { | |
24a66618 | 654 | if (pad->input_enabled) { |
eadff302 | 655 | ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS); |
24a66618 II |
656 | if (ret < 0) |
657 | return; | |
658 | ||
659 | ret &= PMIC_MPP_REG_RT_STS_VAL_MASK; | |
660 | pad->out_value = ret; | |
eadff302 | 661 | } |
d7b5f5cc FW |
662 | /* |
663 | * For the non-LV/MV subtypes only 2 special functions are | |
664 | * available, offsetting the dtest function values by 2. | |
665 | */ | |
666 | function = pad->function; | |
667 | if (!pad->lv_mv_type && | |
668 | pad->function >= PMIC_GPIO_FUNC_INDEX_FUNC3) | |
669 | function += PMIC_GPIO_FUNC_INDEX_DTEST1 - | |
670 | PMIC_GPIO_FUNC_INDEX_FUNC3; | |
671 | ||
672 | if (pad->analog_pass) | |
673 | seq_puts(s, " analog-pass"); | |
674 | else | |
675 | seq_printf(s, " %-4s", | |
676 | pad->output_enabled ? "out" : "in"); | |
677 | seq_printf(s, " %-7s", pmic_gpio_functions[function]); | |
eadff302 II |
678 | seq_printf(s, " vin-%d", pad->power_source); |
679 | seq_printf(s, " %-27s", biases[pad->pullup]); | |
680 | seq_printf(s, " %-10s", buffer_types[pad->buffer_type]); | |
681 | seq_printf(s, " %-4s", pad->out_value ? "high" : "low"); | |
682 | seq_printf(s, " %-7s", strengths[pad->strength]); | |
d7b5f5cc | 683 | seq_printf(s, " atest-%d", pad->atest); |
223463fc | 684 | seq_printf(s, " dtest-%d", pad->dtest_buffer); |
eadff302 II |
685 | } |
686 | } | |
687 | ||
688 | static const struct pinconf_ops pmic_gpio_pinconf_ops = { | |
7382b623 | 689 | .is_generic = true, |
eadff302 II |
690 | .pin_config_group_get = pmic_gpio_config_get, |
691 | .pin_config_group_set = pmic_gpio_config_set, | |
692 | .pin_config_group_dbg_show = pmic_gpio_config_dbg_show, | |
693 | }; | |
694 | ||
695 | static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned pin) | |
696 | { | |
c52d9df1 | 697 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
698 | unsigned long config; |
699 | ||
700 | config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1); | |
701 | ||
702 | return pmic_gpio_config_set(state->ctrl, pin, &config, 1); | |
703 | } | |
704 | ||
705 | static int pmic_gpio_direction_output(struct gpio_chip *chip, | |
706 | unsigned pin, int val) | |
707 | { | |
c52d9df1 | 708 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
709 | unsigned long config; |
710 | ||
711 | config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val); | |
712 | ||
713 | return pmic_gpio_config_set(state->ctrl, pin, &config, 1); | |
714 | } | |
715 | ||
716 | static int pmic_gpio_get(struct gpio_chip *chip, unsigned pin) | |
717 | { | |
c52d9df1 | 718 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
719 | struct pmic_gpio_pad *pad; |
720 | int ret; | |
721 | ||
722 | pad = state->ctrl->desc->pins[pin].drv_data; | |
723 | ||
724 | if (!pad->is_enabled) | |
725 | return -EINVAL; | |
726 | ||
727 | if (pad->input_enabled) { | |
728 | ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS); | |
729 | if (ret < 0) | |
730 | return ret; | |
731 | ||
732 | pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK; | |
733 | } | |
734 | ||
86c1a219 | 735 | return !!pad->out_value; |
eadff302 II |
736 | } |
737 | ||
738 | static void pmic_gpio_set(struct gpio_chip *chip, unsigned pin, int value) | |
739 | { | |
c52d9df1 | 740 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
741 | unsigned long config; |
742 | ||
743 | config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value); | |
744 | ||
745 | pmic_gpio_config_set(state->ctrl, pin, &config, 1); | |
746 | } | |
747 | ||
eadff302 II |
748 | static int pmic_gpio_of_xlate(struct gpio_chip *chip, |
749 | const struct of_phandle_args *gpio_desc, | |
750 | u32 *flags) | |
751 | { | |
752 | if (chip->of_gpio_n_cells < 2) | |
753 | return -EINVAL; | |
754 | ||
755 | if (flags) | |
756 | *flags = gpio_desc->args[1]; | |
757 | ||
758 | return gpio_desc->args[0] - PMIC_GPIO_PHYSICAL_OFFSET; | |
759 | } | |
760 | ||
761 | static int pmic_gpio_to_irq(struct gpio_chip *chip, unsigned pin) | |
762 | { | |
c52d9df1 | 763 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
764 | struct pmic_gpio_pad *pad; |
765 | ||
766 | pad = state->ctrl->desc->pins[pin].drv_data; | |
767 | ||
768 | return pad->irq; | |
769 | } | |
770 | ||
771 | static void pmic_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
772 | { | |
c52d9df1 | 773 | struct pmic_gpio_state *state = gpiochip_get_data(chip); |
eadff302 II |
774 | unsigned i; |
775 | ||
776 | for (i = 0; i < chip->ngpio; i++) { | |
777 | pmic_gpio_config_dbg_show(state->ctrl, s, i); | |
778 | seq_puts(s, "\n"); | |
779 | } | |
780 | } | |
781 | ||
782 | static const struct gpio_chip pmic_gpio_gpio_template = { | |
783 | .direction_input = pmic_gpio_direction_input, | |
784 | .direction_output = pmic_gpio_direction_output, | |
785 | .get = pmic_gpio_get, | |
786 | .set = pmic_gpio_set, | |
98c85d58 JG |
787 | .request = gpiochip_generic_request, |
788 | .free = gpiochip_generic_free, | |
eadff302 II |
789 | .of_xlate = pmic_gpio_of_xlate, |
790 | .to_irq = pmic_gpio_to_irq, | |
791 | .dbg_show = pmic_gpio_dbg_show, | |
792 | }; | |
793 | ||
794 | static int pmic_gpio_populate(struct pmic_gpio_state *state, | |
795 | struct pmic_gpio_pad *pad) | |
796 | { | |
797 | int type, subtype, val, dir; | |
798 | ||
799 | type = pmic_gpio_read(state, pad, PMIC_GPIO_REG_TYPE); | |
800 | if (type < 0) | |
801 | return type; | |
802 | ||
803 | if (type != PMIC_GPIO_TYPE) { | |
804 | dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n", | |
805 | type, pad->base); | |
806 | return -ENODEV; | |
807 | } | |
808 | ||
809 | subtype = pmic_gpio_read(state, pad, PMIC_GPIO_REG_SUBTYPE); | |
810 | if (subtype < 0) | |
811 | return subtype; | |
812 | ||
813 | switch (subtype) { | |
814 | case PMIC_GPIO_SUBTYPE_GPIO_4CH: | |
815 | pad->have_buffer = true; | |
816 | case PMIC_GPIO_SUBTYPE_GPIOC_4CH: | |
817 | pad->num_sources = 4; | |
818 | break; | |
819 | case PMIC_GPIO_SUBTYPE_GPIO_8CH: | |
820 | pad->have_buffer = true; | |
821 | case PMIC_GPIO_SUBTYPE_GPIOC_8CH: | |
822 | pad->num_sources = 8; | |
823 | break; | |
d7b5f5cc FW |
824 | case PMIC_GPIO_SUBTYPE_GPIO_LV: |
825 | pad->num_sources = 1; | |
826 | pad->have_buffer = true; | |
827 | pad->lv_mv_type = true; | |
828 | break; | |
829 | case PMIC_GPIO_SUBTYPE_GPIO_MV: | |
830 | pad->num_sources = 2; | |
831 | pad->have_buffer = true; | |
832 | pad->lv_mv_type = true; | |
833 | break; | |
eadff302 II |
834 | default: |
835 | dev_err(state->dev, "unknown GPIO type 0x%x\n", subtype); | |
836 | return -ENODEV; | |
837 | } | |
838 | ||
d7b5f5cc FW |
839 | if (pad->lv_mv_type) { |
840 | val = pmic_gpio_read(state, pad, | |
841 | PMIC_GPIO_REG_LV_MV_DIG_OUT_SOURCE_CTL); | |
842 | if (val < 0) | |
843 | return val; | |
844 | ||
845 | pad->out_value = !!(val & PMIC_GPIO_LV_MV_OUTPUT_INVERT); | |
846 | pad->function = val & PMIC_GPIO_LV_MV_OUTPUT_SOURCE_SEL_MASK; | |
847 | ||
848 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL); | |
849 | if (val < 0) | |
850 | return val; | |
851 | ||
852 | dir = val & PMIC_GPIO_REG_LV_MV_MODE_DIR_MASK; | |
853 | } else { | |
854 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL); | |
855 | if (val < 0) | |
856 | return val; | |
eadff302 | 857 | |
d7b5f5cc FW |
858 | pad->out_value = val & PMIC_GPIO_REG_MODE_VALUE_SHIFT; |
859 | ||
860 | dir = val >> PMIC_GPIO_REG_MODE_DIR_SHIFT; | |
861 | dir &= PMIC_GPIO_REG_MODE_DIR_MASK; | |
862 | pad->function = val >> PMIC_GPIO_REG_MODE_FUNCTION_SHIFT; | |
863 | pad->function &= PMIC_GPIO_REG_MODE_FUNCTION_MASK; | |
864 | } | |
eadff302 | 865 | |
eadff302 | 866 | switch (dir) { |
d7b5f5cc | 867 | case PMIC_GPIO_MODE_DIGITAL_INPUT: |
eadff302 II |
868 | pad->input_enabled = true; |
869 | pad->output_enabled = false; | |
870 | break; | |
d7b5f5cc | 871 | case PMIC_GPIO_MODE_DIGITAL_OUTPUT: |
eadff302 II |
872 | pad->input_enabled = false; |
873 | pad->output_enabled = true; | |
874 | break; | |
d7b5f5cc | 875 | case PMIC_GPIO_MODE_DIGITAL_INPUT_OUTPUT: |
eadff302 II |
876 | pad->input_enabled = true; |
877 | pad->output_enabled = true; | |
878 | break; | |
d7b5f5cc FW |
879 | case PMIC_GPIO_MODE_ANALOG_PASS_THRU: |
880 | if (!pad->lv_mv_type) | |
881 | return -ENODEV; | |
882 | pad->analog_pass = true; | |
883 | break; | |
eadff302 II |
884 | default: |
885 | dev_err(state->dev, "unknown GPIO direction\n"); | |
886 | return -ENODEV; | |
887 | } | |
888 | ||
eadff302 II |
889 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL); |
890 | if (val < 0) | |
891 | return val; | |
892 | ||
893 | pad->power_source = val >> PMIC_GPIO_REG_VIN_SHIFT; | |
894 | pad->power_source &= PMIC_GPIO_REG_VIN_MASK; | |
895 | ||
896 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL); | |
897 | if (val < 0) | |
898 | return val; | |
899 | ||
900 | pad->pullup = val >> PMIC_GPIO_REG_PULL_SHIFT; | |
901 | pad->pullup &= PMIC_GPIO_REG_PULL_MASK; | |
902 | ||
223463fc FW |
903 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_IN_CTL); |
904 | if (val < 0) | |
905 | return val; | |
906 | ||
907 | if (pad->lv_mv_type && (val & PMIC_GPIO_LV_MV_DIG_IN_DTEST_EN)) | |
908 | pad->dtest_buffer = | |
909 | (val & PMIC_GPIO_LV_MV_DIG_IN_DTEST_SEL_MASK) + 1; | |
910 | else if (!pad->lv_mv_type) | |
911 | pad->dtest_buffer = ffs(val); | |
912 | else | |
913 | pad->dtest_buffer = 0; | |
914 | ||
915 | val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL); | |
916 | if (val < 0) | |
917 | return val; | |
918 | ||
eadff302 II |
919 | pad->strength = val >> PMIC_GPIO_REG_OUT_STRENGTH_SHIFT; |
920 | pad->strength &= PMIC_GPIO_REG_OUT_STRENGTH_MASK; | |
921 | ||
922 | pad->buffer_type = val >> PMIC_GPIO_REG_OUT_TYPE_SHIFT; | |
923 | pad->buffer_type &= PMIC_GPIO_REG_OUT_TYPE_MASK; | |
924 | ||
d7b5f5cc FW |
925 | if (pad->lv_mv_type) { |
926 | val = pmic_gpio_read(state, pad, | |
927 | PMIC_GPIO_REG_LV_MV_ANA_PASS_THRU_SEL); | |
928 | if (val < 0) | |
929 | return val; | |
930 | pad->atest = (val & PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK) + 1; | |
931 | } | |
932 | ||
eadff302 II |
933 | /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */ |
934 | pad->is_enabled = true; | |
935 | return 0; | |
936 | } | |
937 | ||
938 | static int pmic_gpio_probe(struct platform_device *pdev) | |
939 | { | |
940 | struct device *dev = &pdev->dev; | |
941 | struct pinctrl_pin_desc *pindesc; | |
942 | struct pinctrl_desc *pctrldesc; | |
943 | struct pmic_gpio_pad *pad, *pads; | |
944 | struct pmic_gpio_state *state; | |
945 | int ret, npins, i; | |
ab4256cf | 946 | u32 reg; |
eadff302 | 947 | |
ab4256cf | 948 | ret = of_property_read_u32(dev->of_node, "reg", ®); |
eadff302 | 949 | if (ret < 0) { |
ab4256cf | 950 | dev_err(dev, "missing base address"); |
eadff302 II |
951 | return ret; |
952 | } | |
953 | ||
a5ea13f0 | 954 | npins = platform_irq_count(pdev); |
eadff302 II |
955 | if (!npins) |
956 | return -EINVAL; | |
a5ea13f0 SB |
957 | if (npins < 0) |
958 | return npins; | |
eadff302 II |
959 | |
960 | BUG_ON(npins > ARRAY_SIZE(pmic_gpio_groups)); | |
961 | ||
962 | state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); | |
963 | if (!state) | |
964 | return -ENOMEM; | |
965 | ||
966 | platform_set_drvdata(pdev, state); | |
967 | ||
968 | state->dev = &pdev->dev; | |
969 | state->map = dev_get_regmap(dev->parent, NULL); | |
970 | ||
971 | pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL); | |
972 | if (!pindesc) | |
973 | return -ENOMEM; | |
974 | ||
975 | pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL); | |
976 | if (!pads) | |
977 | return -ENOMEM; | |
978 | ||
979 | pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL); | |
980 | if (!pctrldesc) | |
981 | return -ENOMEM; | |
982 | ||
983 | pctrldesc->pctlops = &pmic_gpio_pinctrl_ops; | |
984 | pctrldesc->pmxops = &pmic_gpio_pinmux_ops; | |
985 | pctrldesc->confops = &pmic_gpio_pinconf_ops; | |
986 | pctrldesc->owner = THIS_MODULE; | |
987 | pctrldesc->name = dev_name(dev); | |
988 | pctrldesc->pins = pindesc; | |
989 | pctrldesc->npins = npins; | |
f684e4ac LW |
990 | pctrldesc->num_custom_params = ARRAY_SIZE(pmic_gpio_bindings); |
991 | pctrldesc->custom_params = pmic_gpio_bindings; | |
4f06266a | 992 | #ifdef CONFIG_DEBUG_FS |
f684e4ac | 993 | pctrldesc->custom_conf_items = pmic_conf_items; |
4f06266a | 994 | #endif |
eadff302 II |
995 | |
996 | for (i = 0; i < npins; i++, pindesc++) { | |
997 | pad = &pads[i]; | |
998 | pindesc->drv_data = pad; | |
999 | pindesc->number = i; | |
1000 | pindesc->name = pmic_gpio_groups[i]; | |
1001 | ||
1002 | pad->irq = platform_get_irq(pdev, i); | |
1003 | if (pad->irq < 0) | |
1004 | return pad->irq; | |
1005 | ||
ab4256cf | 1006 | pad->base = reg + i * PMIC_GPIO_ADDRESS_RANGE; |
eadff302 II |
1007 | |
1008 | ret = pmic_gpio_populate(state, pad); | |
1009 | if (ret < 0) | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | state->chip = pmic_gpio_gpio_template; | |
58383c78 | 1014 | state->chip.parent = dev; |
eadff302 II |
1015 | state->chip.base = -1; |
1016 | state->chip.ngpio = npins; | |
1017 | state->chip.label = dev_name(dev); | |
1018 | state->chip.of_gpio_n_cells = 2; | |
1019 | state->chip.can_sleep = false; | |
1020 | ||
b46ddfe6 | 1021 | state->ctrl = devm_pinctrl_register(dev, pctrldesc, state); |
323de9ef MY |
1022 | if (IS_ERR(state->ctrl)) |
1023 | return PTR_ERR(state->ctrl); | |
eadff302 | 1024 | |
c52d9df1 | 1025 | ret = gpiochip_add_data(&state->chip, state); |
eadff302 II |
1026 | if (ret) { |
1027 | dev_err(state->dev, "can't add gpio chip\n"); | |
b46ddfe6 | 1028 | return ret; |
eadff302 II |
1029 | } |
1030 | ||
1031 | ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins); | |
1032 | if (ret) { | |
1033 | dev_err(dev, "failed to add pin range\n"); | |
1034 | goto err_range; | |
1035 | } | |
1036 | ||
1037 | return 0; | |
1038 | ||
1039 | err_range: | |
1040 | gpiochip_remove(&state->chip); | |
eadff302 II |
1041 | return ret; |
1042 | } | |
1043 | ||
1044 | static int pmic_gpio_remove(struct platform_device *pdev) | |
1045 | { | |
1046 | struct pmic_gpio_state *state = platform_get_drvdata(pdev); | |
1047 | ||
1048 | gpiochip_remove(&state->chip); | |
eadff302 II |
1049 | return 0; |
1050 | } | |
1051 | ||
1052 | static const struct of_device_id pmic_gpio_of_match[] = { | |
7414b099 | 1053 | { .compatible = "qcom,pm8916-gpio" }, /* 4 GPIO's */ |
eadff302 | 1054 | { .compatible = "qcom,pm8941-gpio" }, /* 36 GPIO's */ |
016c2f4d | 1055 | { .compatible = "qcom,pm8994-gpio" }, /* 22 GPIO's */ |
8d6cfb14 | 1056 | { .compatible = "qcom,pmi8994-gpio" }, /* 10 GPIO's */ |
eadff302 | 1057 | { .compatible = "qcom,pma8084-gpio" }, /* 22 GPIO's */ |
647dbd1e | 1058 | { .compatible = "qcom,spmi-gpio" }, /* Generic */ |
eadff302 II |
1059 | { }, |
1060 | }; | |
1061 | ||
1062 | MODULE_DEVICE_TABLE(of, pmic_gpio_of_match); | |
1063 | ||
1064 | static struct platform_driver pmic_gpio_driver = { | |
1065 | .driver = { | |
1066 | .name = "qcom-spmi-gpio", | |
1067 | .of_match_table = pmic_gpio_of_match, | |
1068 | }, | |
1069 | .probe = pmic_gpio_probe, | |
1070 | .remove = pmic_gpio_remove, | |
1071 | }; | |
1072 | ||
1073 | module_platform_driver(pmic_gpio_driver); | |
1074 | ||
1075 | MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); | |
1076 | MODULE_DESCRIPTION("Qualcomm SPMI PMIC GPIO pin control driver"); | |
1077 | MODULE_ALIAS("platform:qcom-spmi-gpio"); | |
1078 | MODULE_LICENSE("GPL v2"); |