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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
170c6152 TP |
2 | /* |
3 | * Pinctrl driver for the Wondermedia SoC's | |
4 | * | |
5 | * Copyright (c) 2013 Tony Prisk <linux@prisktech.co.nz> | |
170c6152 TP |
6 | */ |
7 | ||
8 | #include <linux/err.h> | |
5c809c63 | 9 | #include <linux/gpio/driver.h> |
170c6152 TP |
10 | #include <linux/interrupt.h> |
11 | #include <linux/io.h> | |
12 | #include <linux/irq.h> | |
170c6152 TP |
13 | #include <linux/of.h> |
14 | #include <linux/of_irq.h> | |
15 | #include <linux/pinctrl/consumer.h> | |
16 | #include <linux/pinctrl/machine.h> | |
17 | #include <linux/pinctrl/pinconf.h> | |
18 | #include <linux/pinctrl/pinconf-generic.h> | |
19 | #include <linux/pinctrl/pinctrl.h> | |
20 | #include <linux/pinctrl/pinmux.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/slab.h> | |
23 | ||
24 | #include "pinctrl-wmt.h" | |
25 | ||
26 | static inline void wmt_setbits(struct wmt_pinctrl_data *data, u32 reg, | |
27 | u32 mask) | |
28 | { | |
29 | u32 val; | |
30 | ||
31 | val = readl_relaxed(data->base + reg); | |
32 | val |= mask; | |
33 | writel_relaxed(val, data->base + reg); | |
34 | } | |
35 | ||
36 | static inline void wmt_clearbits(struct wmt_pinctrl_data *data, u32 reg, | |
37 | u32 mask) | |
38 | { | |
39 | u32 val; | |
40 | ||
41 | val = readl_relaxed(data->base + reg); | |
42 | val &= ~mask; | |
43 | writel_relaxed(val, data->base + reg); | |
44 | } | |
45 | ||
46 | enum wmt_func_sel { | |
47 | WMT_FSEL_GPIO_IN = 0, | |
48 | WMT_FSEL_GPIO_OUT = 1, | |
49 | WMT_FSEL_ALT = 2, | |
50 | WMT_FSEL_COUNT = 3, | |
51 | }; | |
52 | ||
53 | static const char * const wmt_functions[WMT_FSEL_COUNT] = { | |
54 | [WMT_FSEL_GPIO_IN] = "gpio_in", | |
55 | [WMT_FSEL_GPIO_OUT] = "gpio_out", | |
56 | [WMT_FSEL_ALT] = "alt", | |
57 | }; | |
58 | ||
59 | static int wmt_pmx_get_functions_count(struct pinctrl_dev *pctldev) | |
60 | { | |
61 | return WMT_FSEL_COUNT; | |
62 | } | |
63 | ||
64 | static const char *wmt_pmx_get_function_name(struct pinctrl_dev *pctldev, | |
65 | unsigned selector) | |
66 | { | |
67 | return wmt_functions[selector]; | |
68 | } | |
69 | ||
70 | static int wmt_pmx_get_function_groups(struct pinctrl_dev *pctldev, | |
71 | unsigned selector, | |
72 | const char * const **groups, | |
73 | unsigned * const num_groups) | |
74 | { | |
75 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
76 | ||
77 | /* every pin does every function */ | |
78 | *groups = data->groups; | |
79 | *num_groups = data->ngroups; | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | static int wmt_set_pinmux(struct wmt_pinctrl_data *data, unsigned func, | |
85 | unsigned pin) | |
86 | { | |
87 | u32 bank = WMT_BANK_FROM_PIN(pin); | |
88 | u32 bit = WMT_BIT_FROM_PIN(pin); | |
89 | u32 reg_en = data->banks[bank].reg_en; | |
90 | u32 reg_dir = data->banks[bank].reg_dir; | |
91 | ||
92 | if (reg_dir == NO_REG) { | |
93 | dev_err(data->dev, "pin:%d no direction register defined\n", | |
94 | pin); | |
95 | return -EINVAL; | |
96 | } | |
97 | ||
98 | /* | |
99 | * If reg_en == NO_REG, we assume it is a dedicated GPIO and cannot be | |
100 | * disabled (as on VT8500) and that no alternate function is available. | |
101 | */ | |
102 | switch (func) { | |
103 | case WMT_FSEL_GPIO_IN: | |
104 | if (reg_en != NO_REG) | |
105 | wmt_setbits(data, reg_en, BIT(bit)); | |
106 | wmt_clearbits(data, reg_dir, BIT(bit)); | |
107 | break; | |
108 | case WMT_FSEL_GPIO_OUT: | |
109 | if (reg_en != NO_REG) | |
110 | wmt_setbits(data, reg_en, BIT(bit)); | |
111 | wmt_setbits(data, reg_dir, BIT(bit)); | |
112 | break; | |
113 | case WMT_FSEL_ALT: | |
114 | if (reg_en == NO_REG) { | |
115 | dev_err(data->dev, "pin:%d no alt function available\n", | |
116 | pin); | |
117 | return -EINVAL; | |
118 | } | |
119 | wmt_clearbits(data, reg_en, BIT(bit)); | |
120 | } | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
03e9f0ca LW |
125 | static int wmt_pmx_set_mux(struct pinctrl_dev *pctldev, |
126 | unsigned func_selector, | |
127 | unsigned group_selector) | |
170c6152 TP |
128 | { |
129 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
130 | u32 pinnum = data->pins[group_selector].number; | |
131 | ||
132 | return wmt_set_pinmux(data, func_selector, pinnum); | |
133 | } | |
134 | ||
170c6152 TP |
135 | static void wmt_pmx_gpio_disable_free(struct pinctrl_dev *pctldev, |
136 | struct pinctrl_gpio_range *range, | |
137 | unsigned offset) | |
138 | { | |
139 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
140 | ||
141 | /* disable by setting GPIO_IN */ | |
142 | wmt_set_pinmux(data, WMT_FSEL_GPIO_IN, offset); | |
143 | } | |
144 | ||
145 | static int wmt_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, | |
146 | struct pinctrl_gpio_range *range, | |
147 | unsigned offset, | |
148 | bool input) | |
149 | { | |
150 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
151 | ||
152 | wmt_set_pinmux(data, (input ? WMT_FSEL_GPIO_IN : WMT_FSEL_GPIO_OUT), | |
153 | offset); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
a228d74f | 158 | static const struct pinmux_ops wmt_pinmux_ops = { |
170c6152 TP |
159 | .get_functions_count = wmt_pmx_get_functions_count, |
160 | .get_function_name = wmt_pmx_get_function_name, | |
161 | .get_function_groups = wmt_pmx_get_function_groups, | |
03e9f0ca | 162 | .set_mux = wmt_pmx_set_mux, |
170c6152 TP |
163 | .gpio_disable_free = wmt_pmx_gpio_disable_free, |
164 | .gpio_set_direction = wmt_pmx_gpio_set_direction, | |
165 | }; | |
166 | ||
167 | static int wmt_get_groups_count(struct pinctrl_dev *pctldev) | |
168 | { | |
169 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
170 | ||
171 | return data->ngroups; | |
172 | } | |
173 | ||
174 | static const char *wmt_get_group_name(struct pinctrl_dev *pctldev, | |
175 | unsigned selector) | |
176 | { | |
177 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
178 | ||
179 | return data->groups[selector]; | |
180 | } | |
181 | ||
182 | static int wmt_get_group_pins(struct pinctrl_dev *pctldev, | |
183 | unsigned selector, | |
184 | const unsigned **pins, | |
185 | unsigned *num_pins) | |
186 | { | |
187 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
188 | ||
189 | *pins = &data->pins[selector].number; | |
190 | *num_pins = 1; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static int wmt_pctl_find_group_by_pin(struct wmt_pinctrl_data *data, u32 pin) | |
196 | { | |
197 | int i; | |
198 | ||
199 | for (i = 0; i < data->npins; i++) { | |
200 | if (data->pins[i].number == pin) | |
201 | return i; | |
202 | } | |
203 | ||
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | static int wmt_pctl_dt_node_to_map_func(struct wmt_pinctrl_data *data, | |
208 | struct device_node *np, | |
209 | u32 pin, u32 fnum, | |
210 | struct pinctrl_map **maps) | |
211 | { | |
212 | int group; | |
213 | struct pinctrl_map *map = *maps; | |
214 | ||
215 | if (fnum >= ARRAY_SIZE(wmt_functions)) { | |
216 | dev_err(data->dev, "invalid wm,function %d\n", fnum); | |
217 | return -EINVAL; | |
218 | } | |
219 | ||
220 | group = wmt_pctl_find_group_by_pin(data, pin); | |
221 | if (group < 0) { | |
222 | dev_err(data->dev, "unable to match pin %d to group\n", pin); | |
223 | return group; | |
224 | } | |
225 | ||
226 | map->type = PIN_MAP_TYPE_MUX_GROUP; | |
227 | map->data.mux.group = data->groups[group]; | |
228 | map->data.mux.function = wmt_functions[fnum]; | |
229 | (*maps)++; | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static int wmt_pctl_dt_node_to_map_pull(struct wmt_pinctrl_data *data, | |
235 | struct device_node *np, | |
236 | u32 pin, u32 pull, | |
237 | struct pinctrl_map **maps) | |
238 | { | |
239 | int group; | |
240 | unsigned long *configs; | |
241 | struct pinctrl_map *map = *maps; | |
242 | ||
243 | if (pull > 2) { | |
244 | dev_err(data->dev, "invalid wm,pull %d\n", pull); | |
245 | return -EINVAL; | |
246 | } | |
247 | ||
248 | group = wmt_pctl_find_group_by_pin(data, pin); | |
249 | if (group < 0) { | |
250 | dev_err(data->dev, "unable to match pin %d to group\n", pin); | |
251 | return group; | |
252 | } | |
253 | ||
254 | configs = kzalloc(sizeof(*configs), GFP_KERNEL); | |
255 | if (!configs) | |
256 | return -ENOMEM; | |
257 | ||
f17248ed TP |
258 | switch (pull) { |
259 | case 0: | |
260 | configs[0] = PIN_CONFIG_BIAS_DISABLE; | |
261 | break; | |
262 | case 1: | |
263 | configs[0] = PIN_CONFIG_BIAS_PULL_DOWN; | |
264 | break; | |
265 | case 2: | |
266 | configs[0] = PIN_CONFIG_BIAS_PULL_UP; | |
267 | break; | |
268 | default: | |
269 | configs[0] = PIN_CONFIG_BIAS_DISABLE; | |
270 | dev_err(data->dev, "invalid pull state %d - disabling\n", pull); | |
271 | } | |
170c6152 TP |
272 | |
273 | map->type = PIN_MAP_TYPE_CONFIGS_PIN; | |
274 | map->data.configs.group_or_pin = data->groups[group]; | |
275 | map->data.configs.configs = configs; | |
276 | map->data.configs.num_configs = 1; | |
277 | (*maps)++; | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static void wmt_pctl_dt_free_map(struct pinctrl_dev *pctldev, | |
283 | struct pinctrl_map *maps, | |
284 | unsigned num_maps) | |
285 | { | |
286 | int i; | |
287 | ||
288 | for (i = 0; i < num_maps; i++) | |
289 | if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN) | |
290 | kfree(maps[i].data.configs.configs); | |
291 | ||
292 | kfree(maps); | |
293 | } | |
294 | ||
295 | static int wmt_pctl_dt_node_to_map(struct pinctrl_dev *pctldev, | |
296 | struct device_node *np, | |
297 | struct pinctrl_map **map, | |
298 | unsigned *num_maps) | |
299 | { | |
300 | struct pinctrl_map *maps, *cur_map; | |
301 | struct property *pins, *funcs, *pulls; | |
302 | u32 pin, func, pull; | |
303 | int num_pins, num_funcs, num_pulls, maps_per_pin; | |
304 | int i, err; | |
305 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
306 | ||
307 | pins = of_find_property(np, "wm,pins", NULL); | |
308 | if (!pins) { | |
309 | dev_err(data->dev, "missing wmt,pins property\n"); | |
310 | return -EINVAL; | |
311 | } | |
312 | ||
313 | funcs = of_find_property(np, "wm,function", NULL); | |
314 | pulls = of_find_property(np, "wm,pull", NULL); | |
315 | ||
316 | if (!funcs && !pulls) { | |
317 | dev_err(data->dev, "neither wm,function nor wm,pull specified\n"); | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | /* | |
322 | * The following lines calculate how many values are defined for each | |
323 | * of the properties. | |
324 | */ | |
325 | num_pins = pins->length / sizeof(u32); | |
326 | num_funcs = funcs ? (funcs->length / sizeof(u32)) : 0; | |
327 | num_pulls = pulls ? (pulls->length / sizeof(u32)) : 0; | |
328 | ||
329 | if (num_funcs > 1 && num_funcs != num_pins) { | |
330 | dev_err(data->dev, "wm,function must have 1 or %d entries\n", | |
331 | num_pins); | |
332 | return -EINVAL; | |
333 | } | |
334 | ||
335 | if (num_pulls > 1 && num_pulls != num_pins) { | |
336 | dev_err(data->dev, "wm,pull must have 1 or %d entries\n", | |
337 | num_pins); | |
338 | return -EINVAL; | |
339 | } | |
340 | ||
341 | maps_per_pin = 0; | |
342 | if (num_funcs) | |
343 | maps_per_pin++; | |
344 | if (num_pulls) | |
345 | maps_per_pin++; | |
346 | ||
6396bb22 | 347 | cur_map = maps = kcalloc(num_pins * maps_per_pin, sizeof(*maps), |
170c6152 TP |
348 | GFP_KERNEL); |
349 | if (!maps) | |
350 | return -ENOMEM; | |
351 | ||
352 | for (i = 0; i < num_pins; i++) { | |
353 | err = of_property_read_u32_index(np, "wm,pins", i, &pin); | |
354 | if (err) | |
355 | goto fail; | |
356 | ||
357 | if (pin >= (data->nbanks * 32)) { | |
358 | dev_err(data->dev, "invalid wm,pins value\n"); | |
359 | err = -EINVAL; | |
360 | goto fail; | |
361 | } | |
362 | ||
363 | if (num_funcs) { | |
364 | err = of_property_read_u32_index(np, "wm,function", | |
365 | (num_funcs > 1 ? i : 0), &func); | |
366 | if (err) | |
367 | goto fail; | |
368 | ||
369 | err = wmt_pctl_dt_node_to_map_func(data, np, pin, func, | |
370 | &cur_map); | |
371 | if (err) | |
372 | goto fail; | |
373 | } | |
374 | ||
375 | if (num_pulls) { | |
376 | err = of_property_read_u32_index(np, "wm,pull", | |
377 | (num_pulls > 1 ? i : 0), &pull); | |
378 | if (err) | |
379 | goto fail; | |
380 | ||
381 | err = wmt_pctl_dt_node_to_map_pull(data, np, pin, pull, | |
382 | &cur_map); | |
383 | if (err) | |
384 | goto fail; | |
385 | } | |
386 | } | |
387 | *map = maps; | |
388 | *num_maps = num_pins * maps_per_pin; | |
389 | return 0; | |
390 | ||
391 | /* | |
392 | * The fail path removes any maps that have been allocated. The fail path is | |
393 | * only called from code after maps has been kzalloc'd. It is also safe to | |
394 | * pass 'num_pins * maps_per_pin' as the map count even though we probably | |
395 | * failed before all the mappings were read as all maps are allocated at once, | |
396 | * and configs are only allocated for .type = PIN_MAP_TYPE_CONFIGS_PIN - there | |
397 | * is no failpath where a config can be allocated without .type being set. | |
398 | */ | |
399 | fail: | |
400 | wmt_pctl_dt_free_map(pctldev, maps, num_pins * maps_per_pin); | |
401 | return err; | |
402 | } | |
403 | ||
a228d74f | 404 | static const struct pinctrl_ops wmt_pctl_ops = { |
170c6152 TP |
405 | .get_groups_count = wmt_get_groups_count, |
406 | .get_group_name = wmt_get_group_name, | |
407 | .get_group_pins = wmt_get_group_pins, | |
408 | .dt_node_to_map = wmt_pctl_dt_node_to_map, | |
409 | .dt_free_map = wmt_pctl_dt_free_map, | |
410 | }; | |
411 | ||
412 | static int wmt_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, | |
413 | unsigned long *config) | |
414 | { | |
415 | return -ENOTSUPP; | |
416 | } | |
417 | ||
418 | static int wmt_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, | |
03b054e9 | 419 | unsigned long *configs, unsigned num_configs) |
170c6152 TP |
420 | { |
421 | struct wmt_pinctrl_data *data = pinctrl_dev_get_drvdata(pctldev); | |
03b054e9 | 422 | enum pin_config_param param; |
58957d2e | 423 | u32 arg; |
170c6152 TP |
424 | u32 bank = WMT_BANK_FROM_PIN(pin); |
425 | u32 bit = WMT_BIT_FROM_PIN(pin); | |
426 | u32 reg_pull_en = data->banks[bank].reg_pull_en; | |
427 | u32 reg_pull_cfg = data->banks[bank].reg_pull_cfg; | |
03b054e9 | 428 | int i; |
170c6152 TP |
429 | |
430 | if ((reg_pull_en == NO_REG) || (reg_pull_cfg == NO_REG)) { | |
431 | dev_err(data->dev, "bias functions not supported on pin %d\n", | |
432 | pin); | |
433 | return -EINVAL; | |
434 | } | |
435 | ||
03b054e9 SY |
436 | for (i = 0; i < num_configs; i++) { |
437 | param = pinconf_to_config_param(configs[i]); | |
438 | arg = pinconf_to_config_argument(configs[i]); | |
170c6152 | 439 | |
03b054e9 SY |
440 | if ((param == PIN_CONFIG_BIAS_PULL_DOWN) || |
441 | (param == PIN_CONFIG_BIAS_PULL_UP)) { | |
442 | if (arg == 0) | |
443 | param = PIN_CONFIG_BIAS_DISABLE; | |
444 | } | |
445 | ||
446 | switch (param) { | |
447 | case PIN_CONFIG_BIAS_DISABLE: | |
448 | wmt_clearbits(data, reg_pull_en, BIT(bit)); | |
449 | break; | |
450 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
451 | wmt_clearbits(data, reg_pull_cfg, BIT(bit)); | |
452 | wmt_setbits(data, reg_pull_en, BIT(bit)); | |
453 | break; | |
454 | case PIN_CONFIG_BIAS_PULL_UP: | |
455 | wmt_setbits(data, reg_pull_cfg, BIT(bit)); | |
456 | wmt_setbits(data, reg_pull_en, BIT(bit)); | |
457 | break; | |
458 | default: | |
459 | dev_err(data->dev, "unknown pinconf param\n"); | |
460 | return -EINVAL; | |
461 | } | |
462 | } /* for each config */ | |
170c6152 TP |
463 | |
464 | return 0; | |
465 | } | |
466 | ||
a228d74f | 467 | static const struct pinconf_ops wmt_pinconf_ops = { |
170c6152 TP |
468 | .pin_config_get = wmt_pinconf_get, |
469 | .pin_config_set = wmt_pinconf_set, | |
470 | }; | |
471 | ||
472 | static struct pinctrl_desc wmt_desc = { | |
473 | .owner = THIS_MODULE, | |
474 | .name = "pinctrl-wmt", | |
475 | .pctlops = &wmt_pctl_ops, | |
476 | .pmxops = &wmt_pinmux_ops, | |
477 | .confops = &wmt_pinconf_ops, | |
478 | }; | |
479 | ||
170c6152 TP |
480 | static int wmt_gpio_get_direction(struct gpio_chip *chip, unsigned offset) |
481 | { | |
5c809c63 | 482 | struct wmt_pinctrl_data *data = gpiochip_get_data(chip); |
170c6152 TP |
483 | u32 bank = WMT_BANK_FROM_PIN(offset); |
484 | u32 bit = WMT_BIT_FROM_PIN(offset); | |
485 | u32 reg_dir = data->banks[bank].reg_dir; | |
486 | u32 val; | |
487 | ||
488 | val = readl_relaxed(data->base + reg_dir); | |
1c5fb66a LW |
489 | /* Return 0 == output, 1 == input */ |
490 | return !(val & BIT(bit)); | |
170c6152 TP |
491 | } |
492 | ||
170c6152 TP |
493 | static int wmt_gpio_get_value(struct gpio_chip *chip, unsigned offset) |
494 | { | |
5c809c63 | 495 | struct wmt_pinctrl_data *data = gpiochip_get_data(chip); |
170c6152 TP |
496 | u32 bank = WMT_BANK_FROM_PIN(offset); |
497 | u32 bit = WMT_BIT_FROM_PIN(offset); | |
498 | u32 reg_data_in = data->banks[bank].reg_data_in; | |
499 | ||
500 | if (reg_data_in == NO_REG) { | |
501 | dev_err(data->dev, "no data in register defined\n"); | |
502 | return -EINVAL; | |
503 | } | |
504 | ||
505 | return !!(readl_relaxed(data->base + reg_data_in) & BIT(bit)); | |
506 | } | |
507 | ||
508 | static void wmt_gpio_set_value(struct gpio_chip *chip, unsigned offset, | |
509 | int val) | |
510 | { | |
5c809c63 | 511 | struct wmt_pinctrl_data *data = gpiochip_get_data(chip); |
170c6152 TP |
512 | u32 bank = WMT_BANK_FROM_PIN(offset); |
513 | u32 bit = WMT_BIT_FROM_PIN(offset); | |
514 | u32 reg_data_out = data->banks[bank].reg_data_out; | |
515 | ||
516 | if (reg_data_out == NO_REG) { | |
517 | dev_err(data->dev, "no data out register defined\n"); | |
518 | return; | |
519 | } | |
520 | ||
521 | if (val) | |
522 | wmt_setbits(data, reg_data_out, BIT(bit)); | |
523 | else | |
524 | wmt_clearbits(data, reg_data_out, BIT(bit)); | |
525 | } | |
526 | ||
7ea45643 AC |
527 | static int wmt_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
528 | { | |
529 | return pinctrl_gpio_direction_input(chip->base + offset); | |
530 | } | |
531 | ||
532 | static int wmt_gpio_direction_output(struct gpio_chip *chip, unsigned offset, | |
533 | int value) | |
534 | { | |
535 | wmt_gpio_set_value(chip, offset, value); | |
536 | return pinctrl_gpio_direction_output(chip->base + offset); | |
537 | } | |
538 | ||
3d9c2563 | 539 | static const struct gpio_chip wmt_gpio_chip = { |
170c6152 TP |
540 | .label = "gpio-wmt", |
541 | .owner = THIS_MODULE, | |
98c85d58 JG |
542 | .request = gpiochip_generic_request, |
543 | .free = gpiochip_generic_free, | |
170c6152 TP |
544 | .get_direction = wmt_gpio_get_direction, |
545 | .direction_input = wmt_gpio_direction_input, | |
546 | .direction_output = wmt_gpio_direction_output, | |
547 | .get = wmt_gpio_get_value, | |
548 | .set = wmt_gpio_set_value, | |
9fb1f39e | 549 | .can_sleep = false, |
170c6152 TP |
550 | }; |
551 | ||
552 | int wmt_pinctrl_probe(struct platform_device *pdev, | |
553 | struct wmt_pinctrl_data *data) | |
554 | { | |
555 | int err; | |
556 | struct resource *res; | |
557 | ||
558 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
76cda6ec | 559 | data->base = devm_ioremap_resource(&pdev->dev, res); |
2207a4e1 | 560 | if (IS_ERR(data->base)) |
76cda6ec | 561 | return PTR_ERR(data->base); |
170c6152 TP |
562 | |
563 | wmt_desc.pins = data->pins; | |
564 | wmt_desc.npins = data->npins; | |
565 | ||
566 | data->gpio_chip = wmt_gpio_chip; | |
58383c78 | 567 | data->gpio_chip.parent = &pdev->dev; |
170c6152 TP |
568 | data->gpio_chip.of_node = pdev->dev.of_node; |
569 | data->gpio_chip.ngpio = data->nbanks * 32; | |
570 | ||
571 | platform_set_drvdata(pdev, data); | |
572 | ||
573 | data->dev = &pdev->dev; | |
574 | ||
f3abcb66 | 575 | data->pctl_dev = devm_pinctrl_register(&pdev->dev, &wmt_desc, data); |
323de9ef | 576 | if (IS_ERR(data->pctl_dev)) { |
170c6152 | 577 | dev_err(&pdev->dev, "Failed to register pinctrl\n"); |
323de9ef | 578 | return PTR_ERR(data->pctl_dev); |
170c6152 TP |
579 | } |
580 | ||
5c809c63 | 581 | err = gpiochip_add_data(&data->gpio_chip, data); |
170c6152 TP |
582 | if (err) { |
583 | dev_err(&pdev->dev, "could not add GPIO chip\n"); | |
f3abcb66 | 584 | return err; |
170c6152 TP |
585 | } |
586 | ||
587 | err = gpiochip_add_pin_range(&data->gpio_chip, dev_name(data->dev), | |
588 | 0, 0, data->nbanks * 32); | |
589 | if (err) | |
590 | goto fail_range; | |
591 | ||
592 | dev_info(&pdev->dev, "Pin controller initialized\n"); | |
593 | ||
594 | return 0; | |
595 | ||
596 | fail_range: | |
b4e7c55d | 597 | gpiochip_remove(&data->gpio_chip); |
170c6152 TP |
598 | return err; |
599 | } |