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Commit | Line | Data |
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ae6b4d85 LW |
1 | /* |
2 | * Core driver for the pin config portions of the pin control subsystem | |
3 | * | |
4 | * Copyright (C) 2011 ST-Ericsson SA | |
5 | * Written on behalf of Linaro for ST-Ericsson | |
6 | * | |
7 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
8 | * | |
9 | * License terms: GNU General Public License (GPL) version 2 | |
10 | */ | |
11 | #define pr_fmt(fmt) "pinconfig core: " fmt | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/device.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/debugfs.h> | |
19 | #include <linux/seq_file.h> | |
f07512e6 | 20 | #include <linux/uaccess.h> |
ae6b4d85 LW |
21 | #include <linux/pinctrl/machine.h> |
22 | #include <linux/pinctrl/pinctrl.h> | |
23 | #include <linux/pinctrl/pinconf.h> | |
24 | #include "core.h" | |
25 | #include "pinconf.h" | |
26 | ||
2b694250 SW |
27 | int pinconf_check_ops(struct pinctrl_dev *pctldev) |
28 | { | |
29 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
30 | ||
31 | /* We must be able to read out pin status */ | |
ad6e1107 JC |
32 | if (!ops->pin_config_get && !ops->pin_config_group_get) { |
33 | dev_err(pctldev->dev, | |
34 | "pinconf must be able to read out pin status\n"); | |
2b694250 | 35 | return -EINVAL; |
ad6e1107 | 36 | } |
2b694250 | 37 | /* We have to be able to config the pins in SOME way */ |
ad6e1107 JC |
38 | if (!ops->pin_config_set && !ops->pin_config_group_set) { |
39 | dev_err(pctldev->dev, | |
40 | "pinconf has to be able to set a pins config\n"); | |
2b694250 | 41 | return -EINVAL; |
ad6e1107 | 42 | } |
2b694250 SW |
43 | return 0; |
44 | } | |
45 | ||
1e2082b5 SW |
46 | int pinconf_validate_map(struct pinctrl_map const *map, int i) |
47 | { | |
48 | if (!map->data.configs.group_or_pin) { | |
49 | pr_err("failed to register map %s (%d): no group/pin given\n", | |
50 | map->name, i); | |
51 | return -EINVAL; | |
52 | } | |
53 | ||
c95df2db | 54 | if (!map->data.configs.num_configs || |
1e2082b5 | 55 | !map->data.configs.configs) { |
c95df2db | 56 | pr_err("failed to register map %s (%d): no configs given\n", |
1e2082b5 SW |
57 | map->name, i); |
58 | return -EINVAL; | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
394349f7 | 64 | int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin, |
ae6b4d85 LW |
65 | unsigned long *config) |
66 | { | |
67 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
68 | ||
69 | if (!ops || !ops->pin_config_get) { | |
51cd24ee | 70 | dev_err(pctldev->dev, "cannot get pin configuration, missing " |
ae6b4d85 LW |
71 | "pin_config_get() function in driver\n"); |
72 | return -EINVAL; | |
73 | } | |
74 | ||
75 | return ops->pin_config_get(pctldev, pin, config); | |
76 | } | |
77 | ||
43699dea | 78 | int pin_config_group_get(const char *dev_name, const char *pin_group, |
ae6b4d85 LW |
79 | unsigned long *config) |
80 | { | |
43699dea SW |
81 | struct pinctrl_dev *pctldev; |
82 | const struct pinconf_ops *ops; | |
57b676f9 SW |
83 | int selector, ret; |
84 | ||
9dfac4fd | 85 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
86 | if (!pctldev) { |
87 | ret = -EINVAL; | |
42fed7ba | 88 | return ret; |
57b676f9 | 89 | } |
42fed7ba PC |
90 | |
91 | mutex_lock(&pctldev->mutex); | |
92 | ||
43699dea SW |
93 | ops = pctldev->desc->confops; |
94 | ||
ae6b4d85 | 95 | if (!ops || !ops->pin_config_group_get) { |
51cd24ee | 96 | dev_err(pctldev->dev, "cannot get configuration for pin " |
ae6b4d85 LW |
97 | "group, missing group config get function in " |
98 | "driver\n"); | |
57b676f9 SW |
99 | ret = -EINVAL; |
100 | goto unlock; | |
ae6b4d85 LW |
101 | } |
102 | ||
103 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
104 | if (selector < 0) { |
105 | ret = selector; | |
106 | goto unlock; | |
107 | } | |
ae6b4d85 | 108 | |
57b676f9 SW |
109 | ret = ops->pin_config_group_get(pctldev, selector, config); |
110 | ||
111 | unlock: | |
42fed7ba | 112 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 113 | return ret; |
ae6b4d85 | 114 | } |
ae6b4d85 | 115 | |
1e2082b5 SW |
116 | int pinconf_map_to_setting(struct pinctrl_map const *map, |
117 | struct pinctrl_setting *setting) | |
118 | { | |
119 | struct pinctrl_dev *pctldev = setting->pctldev; | |
70b36378 | 120 | int pin; |
1e2082b5 SW |
121 | |
122 | switch (setting->type) { | |
123 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
70b36378 LW |
124 | pin = pin_get_from_name(pctldev, |
125 | map->data.configs.group_or_pin); | |
126 | if (pin < 0) { | |
127 | dev_err(pctldev->dev, "could not map pin config for \"%s\"", | |
128 | map->data.configs.group_or_pin); | |
129 | return pin; | |
130 | } | |
131 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
132 | break; |
133 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
70b36378 LW |
134 | pin = pinctrl_get_group_selector(pctldev, |
135 | map->data.configs.group_or_pin); | |
136 | if (pin < 0) { | |
137 | dev_err(pctldev->dev, "could not map group config for \"%s\"", | |
138 | map->data.configs.group_or_pin); | |
139 | return pin; | |
140 | } | |
141 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
142 | break; |
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | setting->data.configs.num_configs = map->data.configs.num_configs; | |
148 | setting->data.configs.configs = map->data.configs.configs; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | void pinconf_free_setting(struct pinctrl_setting const *setting) | |
154 | { | |
155 | } | |
156 | ||
157 | int pinconf_apply_setting(struct pinctrl_setting const *setting) | |
158 | { | |
159 | struct pinctrl_dev *pctldev = setting->pctldev; | |
160 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
161 | int i, ret; | |
162 | ||
163 | if (!ops) { | |
164 | dev_err(pctldev->dev, "missing confops\n"); | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
168 | switch (setting->type) { | |
169 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
170 | if (!ops->pin_config_set) { | |
171 | dev_err(pctldev->dev, "missing pin_config_set op\n"); | |
172 | return -EINVAL; | |
173 | } | |
174 | for (i = 0; i < setting->data.configs.num_configs; i++) { | |
175 | ret = ops->pin_config_set(pctldev, | |
176 | setting->data.configs.group_or_pin, | |
177 | setting->data.configs.configs[i]); | |
178 | if (ret < 0) { | |
179 | dev_err(pctldev->dev, | |
180 | "pin_config_set op failed for pin %d config %08lx\n", | |
181 | setting->data.configs.group_or_pin, | |
182 | setting->data.configs.configs[i]); | |
183 | return ret; | |
184 | } | |
185 | } | |
186 | break; | |
187 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
188 | if (!ops->pin_config_group_set) { | |
189 | dev_err(pctldev->dev, | |
190 | "missing pin_config_group_set op\n"); | |
191 | return -EINVAL; | |
192 | } | |
193 | for (i = 0; i < setting->data.configs.num_configs; i++) { | |
194 | ret = ops->pin_config_group_set(pctldev, | |
195 | setting->data.configs.group_or_pin, | |
196 | setting->data.configs.configs[i]); | |
197 | if (ret < 0) { | |
198 | dev_err(pctldev->dev, | |
199 | "pin_config_group_set op failed for group %d config %08lx\n", | |
200 | setting->data.configs.group_or_pin, | |
201 | setting->data.configs.configs[i]); | |
202 | return ret; | |
203 | } | |
204 | } | |
205 | break; | |
206 | default: | |
207 | return -EINVAL; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
ae6b4d85 LW |
213 | #ifdef CONFIG_DEBUG_FS |
214 | ||
1e2082b5 SW |
215 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) |
216 | { | |
6cb41587 SW |
217 | struct pinctrl_dev *pctldev; |
218 | const struct pinconf_ops *confops; | |
1e2082b5 SW |
219 | int i; |
220 | ||
6cb41587 SW |
221 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); |
222 | if (pctldev) | |
223 | confops = pctldev->desc->confops; | |
224 | else | |
225 | confops = NULL; | |
226 | ||
1e2082b5 SW |
227 | switch (map->type) { |
228 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
229 | seq_printf(s, "pin "); | |
230 | break; | |
231 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
232 | seq_printf(s, "group "); | |
233 | break; | |
234 | default: | |
235 | break; | |
236 | } | |
237 | ||
238 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
239 | ||
6cb41587 SW |
240 | for (i = 0; i < map->data.configs.num_configs; i++) { |
241 | seq_printf(s, "config "); | |
242 | if (confops && confops->pin_config_config_dbg_show) | |
243 | confops->pin_config_config_dbg_show(pctldev, s, | |
244 | map->data.configs.configs[i]); | |
245 | else | |
246 | seq_printf(s, "%08lx", map->data.configs.configs[i]); | |
247 | seq_printf(s, "\n"); | |
248 | } | |
1e2082b5 SW |
249 | } |
250 | ||
251 | void pinconf_show_setting(struct seq_file *s, | |
252 | struct pinctrl_setting const *setting) | |
253 | { | |
254 | struct pinctrl_dev *pctldev = setting->pctldev; | |
255 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
6cb41587 | 256 | const struct pinconf_ops *confops = pctldev->desc->confops; |
1e2082b5 SW |
257 | struct pin_desc *desc; |
258 | int i; | |
259 | ||
260 | switch (setting->type) { | |
261 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
262 | desc = pin_desc_get(setting->pctldev, | |
263 | setting->data.configs.group_or_pin); | |
264 | seq_printf(s, "pin %s (%d)", | |
265 | desc->name ? desc->name : "unnamed", | |
266 | setting->data.configs.group_or_pin); | |
267 | break; | |
268 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
269 | seq_printf(s, "group %s (%d)", | |
270 | pctlops->get_group_name(pctldev, | |
271 | setting->data.configs.group_or_pin), | |
272 | setting->data.configs.group_or_pin); | |
273 | break; | |
274 | default: | |
275 | break; | |
276 | } | |
277 | ||
278 | /* | |
279 | * FIXME: We should really get the pin controler to dump the config | |
280 | * values, so they can be decoded to something meaningful. | |
281 | */ | |
6cb41587 SW |
282 | for (i = 0; i < setting->data.configs.num_configs; i++) { |
283 | seq_printf(s, " "); | |
284 | if (confops && confops->pin_config_config_dbg_show) | |
285 | confops->pin_config_config_dbg_show(pctldev, s, | |
286 | setting->data.configs.configs[i]); | |
287 | else | |
288 | seq_printf(s, "%08lx", | |
289 | setting->data.configs.configs[i]); | |
290 | } | |
1e2082b5 SW |
291 | |
292 | seq_printf(s, "\n"); | |
293 | } | |
294 | ||
ae6b4d85 LW |
295 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
296 | struct seq_file *s, int pin) | |
297 | { | |
298 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
299 | ||
394349f7 LW |
300 | /* no-op when not using generic pin config */ |
301 | pinconf_generic_dump_pin(pctldev, s, pin); | |
ae6b4d85 LW |
302 | if (ops && ops->pin_config_dbg_show) |
303 | ops->pin_config_dbg_show(pctldev, s, pin); | |
304 | } | |
305 | ||
306 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
307 | { | |
308 | struct pinctrl_dev *pctldev = s->private; | |
ad8bb720 | 309 | const struct pinconf_ops *ops = pctldev->desc->confops; |
706e8520 | 310 | unsigned i, pin; |
ae6b4d85 | 311 | |
ad8bb720 DA |
312 | if (!ops || !ops->pin_config_get) |
313 | return 0; | |
314 | ||
ae6b4d85 | 315 | seq_puts(s, "Pin config settings per pin\n"); |
2aeefe02 | 316 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 317 | |
42fed7ba | 318 | mutex_lock(&pctldev->mutex); |
57b676f9 | 319 | |
706e8520 | 320 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 321 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
322 | struct pin_desc *desc; |
323 | ||
706e8520 | 324 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 325 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 326 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
327 | if (desc == NULL) |
328 | continue; | |
329 | ||
330 | seq_printf(s, "pin %d (%s):", pin, | |
331 | desc->name ? desc->name : "unnamed"); | |
332 | ||
333 | pinconf_dump_pin(pctldev, s, pin); | |
334 | ||
335 | seq_printf(s, "\n"); | |
336 | } | |
337 | ||
42fed7ba | 338 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 339 | |
ae6b4d85 LW |
340 | return 0; |
341 | } | |
342 | ||
343 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
344 | struct seq_file *s, unsigned selector, | |
345 | const char *gname) | |
346 | { | |
347 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
348 | ||
394349f7 LW |
349 | /* no-op when not using generic pin config */ |
350 | pinconf_generic_dump_group(pctldev, s, gname); | |
ae6b4d85 LW |
351 | if (ops && ops->pin_config_group_dbg_show) |
352 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
353 | } | |
354 | ||
355 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
356 | { | |
357 | struct pinctrl_dev *pctldev = s->private; | |
358 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
359 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
d1e90e9e | 360 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
361 | unsigned selector = 0; |
362 | ||
363 | if (!ops || !ops->pin_config_group_get) | |
364 | return 0; | |
365 | ||
366 | seq_puts(s, "Pin config settings per pin group\n"); | |
2aeefe02 | 367 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 368 | |
d1e90e9e | 369 | while (selector < ngroups) { |
ae6b4d85 LW |
370 | const char *gname = pctlops->get_group_name(pctldev, selector); |
371 | ||
372 | seq_printf(s, "%u (%s):", selector, gname); | |
373 | pinconf_dump_group(pctldev, s, selector, gname); | |
f7b9006f SW |
374 | seq_printf(s, "\n"); |
375 | ||
ae6b4d85 LW |
376 | selector++; |
377 | } | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
383 | { | |
384 | return single_open(file, pinconf_pins_show, inode->i_private); | |
385 | } | |
386 | ||
387 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
388 | { | |
389 | return single_open(file, pinconf_groups_show, inode->i_private); | |
390 | } | |
391 | ||
392 | static const struct file_operations pinconf_pins_ops = { | |
393 | .open = pinconf_pins_open, | |
394 | .read = seq_read, | |
395 | .llseek = seq_lseek, | |
396 | .release = single_release, | |
397 | }; | |
398 | ||
399 | static const struct file_operations pinconf_groups_ops = { | |
400 | .open = pinconf_groups_open, | |
401 | .read = seq_read, | |
402 | .llseek = seq_lseek, | |
403 | .release = single_release, | |
404 | }; | |
405 | ||
f07512e6 LM |
406 | #define MAX_NAME_LEN 15 |
407 | ||
408 | struct dbg_cfg { | |
409 | enum pinctrl_map_type map_type; | |
410 | char dev_name[MAX_NAME_LEN+1]; | |
411 | char state_name[MAX_NAME_LEN+1]; | |
412 | char pin_name[MAX_NAME_LEN+1]; | |
413 | }; | |
414 | ||
415 | /* | |
416 | * Goal is to keep this structure as global in order to simply read the | |
417 | * pinconf-config file after a write to check config is as expected | |
418 | */ | |
419 | static struct dbg_cfg pinconf_dbg_conf; | |
420 | ||
421 | /** | |
422 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
423 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
424 | * @s: string filled in with config description | |
425 | * @d: not used | |
426 | */ | |
427 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
428 | { | |
429 | struct pinctrl_maps *maps_node; | |
430 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
431 | const struct pinctrl_map *found = NULL; |
432 | struct pinctrl_dev *pctldev; | |
f07512e6 | 433 | const struct pinconf_ops *confops = NULL; |
f07512e6 LM |
434 | struct dbg_cfg *dbg = &pinconf_dbg_conf; |
435 | int i, j; | |
f07512e6 LM |
436 | unsigned long config; |
437 | ||
a386267a | 438 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
439 | |
440 | /* Parse the pinctrl map and look for the elected pin/state */ | |
441 | for_each_maps(maps_node, i, map) { | |
442 | if (map->type != dbg->map_type) | |
443 | continue; | |
444 | if (strcmp(map->dev_name, dbg->dev_name)) | |
445 | continue; | |
446 | if (strcmp(map->name, dbg->state_name)) | |
447 | continue; | |
448 | ||
449 | for (j = 0; j < map->data.configs.num_configs; j++) { | |
450 | if (!strcmp(map->data.configs.group_or_pin, | |
451 | dbg->pin_name)) { | |
8a9dcc3f RKAL |
452 | /* We found the right pin / state */ |
453 | found = map; | |
f07512e6 LM |
454 | break; |
455 | } | |
456 | } | |
457 | } | |
458 | ||
459 | if (!found) { | |
460 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
461 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
462 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
463 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
464 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
465 | "<state> <pinname> <value>\n"); | |
466 | goto exit; | |
467 | } | |
468 | ||
8a9dcc3f RKAL |
469 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
470 | config = *found->data.configs.configs; | |
f07512e6 LM |
471 | seq_printf(s, "Dev %s has config of %s in state %s: 0x%08lX\n", |
472 | dbg->dev_name, dbg->pin_name, | |
473 | dbg->state_name, config); | |
474 | ||
475 | if (pctldev) | |
476 | confops = pctldev->desc->confops; | |
477 | ||
478 | if (confops && confops->pin_config_config_dbg_show) | |
479 | confops->pin_config_config_dbg_show(pctldev, s, config); | |
480 | ||
481 | exit: | |
a386267a | 482 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
483 | |
484 | return 0; | |
485 | } | |
486 | ||
487 | /** | |
488 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
489 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
490 | * @user_buf: contains the modification request with expected format: | |
491 | * modify config_pin <devicename> <state> <pinname> <newvalue> | |
492 | * modify is literal string, alternatives like add/delete not supported yet | |
493 | * config_pin is literal, alternatives like config_mux not supported yet | |
494 | * <devicename> <state> <pinname> are values that should match the pinctrl-maps | |
495 | * <newvalue> reflects the new config and is driver dependant | |
496 | */ | |
497 | static int pinconf_dbg_config_write(struct file *file, | |
498 | const char __user *user_buf, size_t count, loff_t *ppos) | |
499 | { | |
500 | struct pinctrl_maps *maps_node; | |
501 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
502 | const struct pinctrl_map *found = NULL; |
503 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
504 | const struct pinconf_ops *confops = NULL; |
505 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
506 | const struct pinctrl_map_configs *configs; | |
507 | char config[MAX_NAME_LEN+1]; | |
f07512e6 LM |
508 | char buf[128]; |
509 | char *b = &buf[0]; | |
510 | int buf_size; | |
511 | char *token; | |
512 | int i; | |
513 | ||
514 | /* Get userspace string and assure termination */ | |
515 | buf_size = min(count, (sizeof(buf)-1)); | |
516 | if (copy_from_user(buf, user_buf, buf_size)) | |
517 | return -EFAULT; | |
518 | buf[buf_size] = 0; | |
519 | ||
520 | /* | |
521 | * need to parse entry and extract parameters: | |
522 | * modify configs_pin devicename state pinname newvalue | |
523 | */ | |
524 | ||
525 | /* Get arg: 'modify' */ | |
526 | token = strsep(&b, " "); | |
527 | if (!token) | |
528 | return -EINVAL; | |
529 | if (strcmp(token, "modify")) | |
530 | return -EINVAL; | |
531 | ||
532 | /* Get arg type: "config_pin" type supported so far */ | |
533 | token = strsep(&b, " "); | |
534 | if (!token) | |
535 | return -EINVAL; | |
536 | if (strcmp(token, "config_pin")) | |
537 | return -EINVAL; | |
538 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
539 | ||
540 | /* get arg 'device_name' */ | |
541 | token = strsep(&b, " "); | |
542 | if (token == NULL) | |
543 | return -EINVAL; | |
544 | if (strlen(token) >= MAX_NAME_LEN) | |
545 | return -EINVAL; | |
546 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
547 | ||
548 | /* get arg 'state_name' */ | |
549 | token = strsep(&b, " "); | |
550 | if (token == NULL) | |
551 | return -EINVAL; | |
552 | if (strlen(token) >= MAX_NAME_LEN) | |
553 | return -EINVAL; | |
554 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
555 | ||
556 | /* get arg 'pin_name' */ | |
557 | token = strsep(&b, " "); | |
558 | if (token == NULL) | |
559 | return -EINVAL; | |
560 | if (strlen(token) >= MAX_NAME_LEN) | |
561 | return -EINVAL; | |
562 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
563 | ||
564 | /* get new_value of config' */ | |
565 | token = strsep(&b, " "); | |
566 | if (token == NULL) | |
567 | return -EINVAL; | |
568 | if (strlen(token) >= MAX_NAME_LEN) | |
569 | return -EINVAL; | |
570 | strncpy(config, token, MAX_NAME_LEN); | |
571 | ||
42fed7ba | 572 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
573 | |
574 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
575 | for_each_maps(maps_node, i, map) { | |
576 | if (strcmp(map->dev_name, dbg->dev_name)) | |
577 | continue; | |
578 | if (map->type != dbg->map_type) | |
579 | continue; | |
580 | if (strcmp(map->name, dbg->state_name)) | |
581 | continue; | |
582 | ||
583 | /* we found the right pin / state, so overwrite config */ | |
584 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
8a9dcc3f | 585 | found = map; |
f07512e6 LM |
586 | break; |
587 | } | |
588 | } | |
589 | ||
590 | if (!found) { | |
f07512e6 | 591 | count = -EINVAL; |
cb6d315d | 592 | goto exit; |
f07512e6 LM |
593 | } |
594 | ||
8a9dcc3f | 595 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
f07512e6 LM |
596 | if (pctldev) |
597 | confops = pctldev->desc->confops; | |
598 | ||
599 | if (confops && confops->pin_config_dbg_parse_modify) { | |
8a9dcc3f | 600 | configs = &found->data.configs; |
f07512e6 LM |
601 | for (i = 0; i < configs->num_configs; i++) { |
602 | confops->pin_config_dbg_parse_modify(pctldev, | |
603 | config, | |
604 | &configs->configs[i]); | |
605 | } | |
606 | } | |
607 | ||
608 | exit: | |
42fed7ba | 609 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
610 | |
611 | return count; | |
612 | } | |
613 | ||
614 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
615 | { | |
616 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
617 | } | |
618 | ||
619 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
620 | .open = pinconf_dbg_config_open, | |
621 | .write = pinconf_dbg_config_write, | |
622 | .read = seq_read, | |
623 | .llseek = seq_lseek, | |
624 | .release = single_release, | |
625 | .owner = THIS_MODULE, | |
626 | }; | |
627 | ||
ae6b4d85 LW |
628 | void pinconf_init_device_debugfs(struct dentry *devroot, |
629 | struct pinctrl_dev *pctldev) | |
630 | { | |
631 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
632 | devroot, pctldev, &pinconf_pins_ops); | |
633 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
634 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
635 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
636 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
637 | } |
638 | ||
639 | #endif |