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 | ||
2b694250 | 31 | /* We have to be able to config the pins in SOME way */ |
ad6e1107 JC |
32 | if (!ops->pin_config_set && !ops->pin_config_group_set) { |
33 | dev_err(pctldev->dev, | |
34 | "pinconf has to be able to set a pins config\n"); | |
2b694250 | 35 | return -EINVAL; |
ad6e1107 | 36 | } |
2b694250 SW |
37 | return 0; |
38 | } | |
39 | ||
1e2082b5 SW |
40 | int pinconf_validate_map(struct pinctrl_map const *map, int i) |
41 | { | |
42 | if (!map->data.configs.group_or_pin) { | |
43 | pr_err("failed to register map %s (%d): no group/pin given\n", | |
44 | map->name, i); | |
45 | return -EINVAL; | |
46 | } | |
47 | ||
c95df2db | 48 | if (!map->data.configs.num_configs || |
1e2082b5 | 49 | !map->data.configs.configs) { |
c95df2db | 50 | pr_err("failed to register map %s (%d): no configs given\n", |
1e2082b5 SW |
51 | map->name, i); |
52 | return -EINVAL; | |
53 | } | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
394349f7 | 58 | int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin, |
ae6b4d85 LW |
59 | unsigned long *config) |
60 | { | |
61 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
62 | ||
63 | if (!ops || !ops->pin_config_get) { | |
c420619d | 64 | dev_dbg(pctldev->dev, "cannot get pin configuration, missing " |
ae6b4d85 | 65 | "pin_config_get() function in driver\n"); |
c420619d | 66 | return -ENOTSUPP; |
ae6b4d85 LW |
67 | } |
68 | ||
69 | return ops->pin_config_get(pctldev, pin, config); | |
70 | } | |
71 | ||
43699dea | 72 | int pin_config_group_get(const char *dev_name, const char *pin_group, |
ae6b4d85 LW |
73 | unsigned long *config) |
74 | { | |
43699dea SW |
75 | struct pinctrl_dev *pctldev; |
76 | const struct pinconf_ops *ops; | |
57b676f9 SW |
77 | int selector, ret; |
78 | ||
9dfac4fd | 79 | pctldev = get_pinctrl_dev_from_devname(dev_name); |
57b676f9 SW |
80 | if (!pctldev) { |
81 | ret = -EINVAL; | |
42fed7ba | 82 | return ret; |
57b676f9 | 83 | } |
42fed7ba PC |
84 | |
85 | mutex_lock(&pctldev->mutex); | |
86 | ||
43699dea SW |
87 | ops = pctldev->desc->confops; |
88 | ||
ae6b4d85 | 89 | if (!ops || !ops->pin_config_group_get) { |
c420619d | 90 | dev_dbg(pctldev->dev, "cannot get configuration for pin " |
ae6b4d85 LW |
91 | "group, missing group config get function in " |
92 | "driver\n"); | |
c420619d | 93 | ret = -ENOTSUPP; |
57b676f9 | 94 | goto unlock; |
ae6b4d85 LW |
95 | } |
96 | ||
97 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
98 | if (selector < 0) { |
99 | ret = selector; | |
100 | goto unlock; | |
101 | } | |
ae6b4d85 | 102 | |
57b676f9 SW |
103 | ret = ops->pin_config_group_get(pctldev, selector, config); |
104 | ||
105 | unlock: | |
42fed7ba | 106 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 107 | return ret; |
ae6b4d85 | 108 | } |
ae6b4d85 | 109 | |
1e2082b5 SW |
110 | int pinconf_map_to_setting(struct pinctrl_map const *map, |
111 | struct pinctrl_setting *setting) | |
112 | { | |
113 | struct pinctrl_dev *pctldev = setting->pctldev; | |
70b36378 | 114 | int pin; |
1e2082b5 SW |
115 | |
116 | switch (setting->type) { | |
117 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
70b36378 LW |
118 | pin = pin_get_from_name(pctldev, |
119 | map->data.configs.group_or_pin); | |
120 | if (pin < 0) { | |
121 | dev_err(pctldev->dev, "could not map pin config for \"%s\"", | |
122 | map->data.configs.group_or_pin); | |
123 | return pin; | |
124 | } | |
125 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
126 | break; |
127 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
70b36378 LW |
128 | pin = pinctrl_get_group_selector(pctldev, |
129 | map->data.configs.group_or_pin); | |
130 | if (pin < 0) { | |
131 | dev_err(pctldev->dev, "could not map group config for \"%s\"", | |
132 | map->data.configs.group_or_pin); | |
133 | return pin; | |
134 | } | |
135 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
136 | break; |
137 | default: | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | setting->data.configs.num_configs = map->data.configs.num_configs; | |
142 | setting->data.configs.configs = map->data.configs.configs; | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | void pinconf_free_setting(struct pinctrl_setting const *setting) | |
148 | { | |
149 | } | |
150 | ||
151 | int pinconf_apply_setting(struct pinctrl_setting const *setting) | |
152 | { | |
153 | struct pinctrl_dev *pctldev = setting->pctldev; | |
154 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
03b054e9 | 155 | int ret; |
1e2082b5 SW |
156 | |
157 | if (!ops) { | |
158 | dev_err(pctldev->dev, "missing confops\n"); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | switch (setting->type) { | |
163 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
164 | if (!ops->pin_config_set) { | |
165 | dev_err(pctldev->dev, "missing pin_config_set op\n"); | |
166 | return -EINVAL; | |
167 | } | |
03b054e9 SY |
168 | ret = ops->pin_config_set(pctldev, |
169 | setting->data.configs.group_or_pin, | |
170 | setting->data.configs.configs, | |
171 | setting->data.configs.num_configs); | |
172 | if (ret < 0) { | |
173 | dev_err(pctldev->dev, | |
174 | "pin_config_set op failed for pin %d\n", | |
175 | setting->data.configs.group_or_pin); | |
176 | return ret; | |
1e2082b5 SW |
177 | } |
178 | break; | |
179 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
180 | if (!ops->pin_config_group_set) { | |
181 | dev_err(pctldev->dev, | |
182 | "missing pin_config_group_set op\n"); | |
183 | return -EINVAL; | |
184 | } | |
03b054e9 SY |
185 | ret = ops->pin_config_group_set(pctldev, |
186 | setting->data.configs.group_or_pin, | |
187 | setting->data.configs.configs, | |
188 | setting->data.configs.num_configs); | |
189 | if (ret < 0) { | |
190 | dev_err(pctldev->dev, | |
191 | "pin_config_group_set op failed for group %d\n", | |
192 | setting->data.configs.group_or_pin); | |
193 | return ret; | |
1e2082b5 SW |
194 | } |
195 | break; | |
196 | default: | |
197 | return -EINVAL; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
ae6b4d85 LW |
203 | #ifdef CONFIG_DEBUG_FS |
204 | ||
1e2082b5 SW |
205 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) |
206 | { | |
6cb41587 SW |
207 | struct pinctrl_dev *pctldev; |
208 | const struct pinconf_ops *confops; | |
1e2082b5 SW |
209 | int i; |
210 | ||
6cb41587 SW |
211 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); |
212 | if (pctldev) | |
213 | confops = pctldev->desc->confops; | |
214 | else | |
215 | confops = NULL; | |
216 | ||
1e2082b5 SW |
217 | switch (map->type) { |
218 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
219 | seq_printf(s, "pin "); | |
220 | break; | |
221 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
222 | seq_printf(s, "group "); | |
223 | break; | |
224 | default: | |
225 | break; | |
226 | } | |
227 | ||
228 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
229 | ||
6cb41587 SW |
230 | for (i = 0; i < map->data.configs.num_configs; i++) { |
231 | seq_printf(s, "config "); | |
232 | if (confops && confops->pin_config_config_dbg_show) | |
233 | confops->pin_config_config_dbg_show(pctldev, s, | |
234 | map->data.configs.configs[i]); | |
235 | else | |
236 | seq_printf(s, "%08lx", map->data.configs.configs[i]); | |
237 | seq_printf(s, "\n"); | |
238 | } | |
1e2082b5 SW |
239 | } |
240 | ||
241 | void pinconf_show_setting(struct seq_file *s, | |
242 | struct pinctrl_setting const *setting) | |
243 | { | |
244 | struct pinctrl_dev *pctldev = setting->pctldev; | |
245 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
6cb41587 | 246 | const struct pinconf_ops *confops = pctldev->desc->confops; |
1e2082b5 SW |
247 | struct pin_desc *desc; |
248 | int i; | |
249 | ||
250 | switch (setting->type) { | |
251 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
252 | desc = pin_desc_get(setting->pctldev, | |
253 | setting->data.configs.group_or_pin); | |
254 | seq_printf(s, "pin %s (%d)", | |
255 | desc->name ? desc->name : "unnamed", | |
256 | setting->data.configs.group_or_pin); | |
257 | break; | |
258 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
259 | seq_printf(s, "group %s (%d)", | |
260 | pctlops->get_group_name(pctldev, | |
261 | setting->data.configs.group_or_pin), | |
262 | setting->data.configs.group_or_pin); | |
263 | break; | |
264 | default: | |
265 | break; | |
266 | } | |
267 | ||
268 | /* | |
269 | * FIXME: We should really get the pin controler to dump the config | |
270 | * values, so they can be decoded to something meaningful. | |
271 | */ | |
6cb41587 SW |
272 | for (i = 0; i < setting->data.configs.num_configs; i++) { |
273 | seq_printf(s, " "); | |
274 | if (confops && confops->pin_config_config_dbg_show) | |
275 | confops->pin_config_config_dbg_show(pctldev, s, | |
276 | setting->data.configs.configs[i]); | |
277 | else | |
278 | seq_printf(s, "%08lx", | |
279 | setting->data.configs.configs[i]); | |
280 | } | |
1e2082b5 SW |
281 | |
282 | seq_printf(s, "\n"); | |
283 | } | |
284 | ||
ae6b4d85 LW |
285 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
286 | struct seq_file *s, int pin) | |
287 | { | |
288 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
289 | ||
394349f7 | 290 | /* no-op when not using generic pin config */ |
dd4d01f7 | 291 | pinconf_generic_dump_pins(pctldev, s, NULL, pin); |
ae6b4d85 LW |
292 | if (ops && ops->pin_config_dbg_show) |
293 | ops->pin_config_dbg_show(pctldev, s, pin); | |
294 | } | |
295 | ||
296 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
297 | { | |
298 | struct pinctrl_dev *pctldev = s->private; | |
706e8520 | 299 | unsigned i, pin; |
ae6b4d85 LW |
300 | |
301 | seq_puts(s, "Pin config settings per pin\n"); | |
2aeefe02 | 302 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 303 | |
42fed7ba | 304 | mutex_lock(&pctldev->mutex); |
57b676f9 | 305 | |
706e8520 | 306 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 307 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
308 | struct pin_desc *desc; |
309 | ||
706e8520 | 310 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 311 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 312 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
313 | if (desc == NULL) |
314 | continue; | |
315 | ||
316 | seq_printf(s, "pin %d (%s):", pin, | |
317 | desc->name ? desc->name : "unnamed"); | |
318 | ||
319 | pinconf_dump_pin(pctldev, s, pin); | |
320 | ||
321 | seq_printf(s, "\n"); | |
322 | } | |
323 | ||
42fed7ba | 324 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 325 | |
ae6b4d85 LW |
326 | return 0; |
327 | } | |
328 | ||
329 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
330 | struct seq_file *s, unsigned selector, | |
331 | const char *gname) | |
332 | { | |
333 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
334 | ||
394349f7 | 335 | /* no-op when not using generic pin config */ |
dd4d01f7 | 336 | pinconf_generic_dump_pins(pctldev, s, gname, 0); |
ae6b4d85 LW |
337 | if (ops && ops->pin_config_group_dbg_show) |
338 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
339 | } | |
340 | ||
341 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
342 | { | |
343 | struct pinctrl_dev *pctldev = s->private; | |
344 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
d1e90e9e | 345 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
346 | unsigned selector = 0; |
347 | ||
ae6b4d85 | 348 | seq_puts(s, "Pin config settings per pin group\n"); |
2aeefe02 | 349 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 350 | |
d1e90e9e | 351 | while (selector < ngroups) { |
ae6b4d85 LW |
352 | const char *gname = pctlops->get_group_name(pctldev, selector); |
353 | ||
354 | seq_printf(s, "%u (%s):", selector, gname); | |
355 | pinconf_dump_group(pctldev, s, selector, gname); | |
f7b9006f SW |
356 | seq_printf(s, "\n"); |
357 | ||
ae6b4d85 LW |
358 | selector++; |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
365 | { | |
366 | return single_open(file, pinconf_pins_show, inode->i_private); | |
367 | } | |
368 | ||
369 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
370 | { | |
371 | return single_open(file, pinconf_groups_show, inode->i_private); | |
372 | } | |
373 | ||
374 | static const struct file_operations pinconf_pins_ops = { | |
375 | .open = pinconf_pins_open, | |
376 | .read = seq_read, | |
377 | .llseek = seq_lseek, | |
378 | .release = single_release, | |
379 | }; | |
380 | ||
381 | static const struct file_operations pinconf_groups_ops = { | |
382 | .open = pinconf_groups_open, | |
383 | .read = seq_read, | |
384 | .llseek = seq_lseek, | |
385 | .release = single_release, | |
386 | }; | |
387 | ||
f07512e6 LM |
388 | #define MAX_NAME_LEN 15 |
389 | ||
390 | struct dbg_cfg { | |
391 | enum pinctrl_map_type map_type; | |
392 | char dev_name[MAX_NAME_LEN+1]; | |
393 | char state_name[MAX_NAME_LEN+1]; | |
394 | char pin_name[MAX_NAME_LEN+1]; | |
395 | }; | |
396 | ||
397 | /* | |
398 | * Goal is to keep this structure as global in order to simply read the | |
399 | * pinconf-config file after a write to check config is as expected | |
400 | */ | |
401 | static struct dbg_cfg pinconf_dbg_conf; | |
402 | ||
403 | /** | |
404 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
405 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
406 | * @s: string filled in with config description | |
407 | * @d: not used | |
408 | */ | |
409 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
410 | { | |
411 | struct pinctrl_maps *maps_node; | |
412 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
413 | const struct pinctrl_map *found = NULL; |
414 | struct pinctrl_dev *pctldev; | |
f07512e6 | 415 | const struct pinconf_ops *confops = NULL; |
f07512e6 LM |
416 | struct dbg_cfg *dbg = &pinconf_dbg_conf; |
417 | int i, j; | |
f07512e6 LM |
418 | unsigned long config; |
419 | ||
a386267a | 420 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
421 | |
422 | /* Parse the pinctrl map and look for the elected pin/state */ | |
423 | for_each_maps(maps_node, i, map) { | |
424 | if (map->type != dbg->map_type) | |
425 | continue; | |
426 | if (strcmp(map->dev_name, dbg->dev_name)) | |
427 | continue; | |
428 | if (strcmp(map->name, dbg->state_name)) | |
429 | continue; | |
430 | ||
431 | for (j = 0; j < map->data.configs.num_configs; j++) { | |
432 | if (!strcmp(map->data.configs.group_or_pin, | |
433 | dbg->pin_name)) { | |
8a9dcc3f RKAL |
434 | /* We found the right pin / state */ |
435 | found = map; | |
f07512e6 LM |
436 | break; |
437 | } | |
438 | } | |
439 | } | |
440 | ||
441 | if (!found) { | |
442 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
443 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
444 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
445 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
446 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
447 | "<state> <pinname> <value>\n"); | |
448 | goto exit; | |
449 | } | |
450 | ||
8a9dcc3f RKAL |
451 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
452 | config = *found->data.configs.configs; | |
f07512e6 LM |
453 | seq_printf(s, "Dev %s has config of %s in state %s: 0x%08lX\n", |
454 | dbg->dev_name, dbg->pin_name, | |
455 | dbg->state_name, config); | |
456 | ||
457 | if (pctldev) | |
458 | confops = pctldev->desc->confops; | |
459 | ||
460 | if (confops && confops->pin_config_config_dbg_show) | |
461 | confops->pin_config_config_dbg_show(pctldev, s, config); | |
462 | ||
463 | exit: | |
a386267a | 464 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
465 | |
466 | return 0; | |
467 | } | |
468 | ||
469 | /** | |
470 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
471 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
472 | * @user_buf: contains the modification request with expected format: | |
473 | * modify config_pin <devicename> <state> <pinname> <newvalue> | |
474 | * modify is literal string, alternatives like add/delete not supported yet | |
475 | * config_pin is literal, alternatives like config_mux not supported yet | |
476 | * <devicename> <state> <pinname> are values that should match the pinctrl-maps | |
477 | * <newvalue> reflects the new config and is driver dependant | |
478 | */ | |
3b59e432 | 479 | static ssize_t pinconf_dbg_config_write(struct file *file, |
f07512e6 LM |
480 | const char __user *user_buf, size_t count, loff_t *ppos) |
481 | { | |
482 | struct pinctrl_maps *maps_node; | |
483 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
484 | const struct pinctrl_map *found = NULL; |
485 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
486 | const struct pinconf_ops *confops = NULL; |
487 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
488 | const struct pinctrl_map_configs *configs; | |
489 | char config[MAX_NAME_LEN+1]; | |
f07512e6 LM |
490 | char buf[128]; |
491 | char *b = &buf[0]; | |
492 | int buf_size; | |
493 | char *token; | |
494 | int i; | |
495 | ||
496 | /* Get userspace string and assure termination */ | |
81d36c4f | 497 | buf_size = min(count, sizeof(buf) - 1); |
f07512e6 LM |
498 | if (copy_from_user(buf, user_buf, buf_size)) |
499 | return -EFAULT; | |
500 | buf[buf_size] = 0; | |
501 | ||
502 | /* | |
503 | * need to parse entry and extract parameters: | |
504 | * modify configs_pin devicename state pinname newvalue | |
505 | */ | |
506 | ||
507 | /* Get arg: 'modify' */ | |
508 | token = strsep(&b, " "); | |
509 | if (!token) | |
510 | return -EINVAL; | |
511 | if (strcmp(token, "modify")) | |
512 | return -EINVAL; | |
513 | ||
514 | /* Get arg type: "config_pin" type supported so far */ | |
515 | token = strsep(&b, " "); | |
516 | if (!token) | |
517 | return -EINVAL; | |
518 | if (strcmp(token, "config_pin")) | |
519 | return -EINVAL; | |
520 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
521 | ||
522 | /* get arg 'device_name' */ | |
523 | token = strsep(&b, " "); | |
524 | if (token == NULL) | |
525 | return -EINVAL; | |
526 | if (strlen(token) >= MAX_NAME_LEN) | |
527 | return -EINVAL; | |
528 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
529 | ||
530 | /* get arg 'state_name' */ | |
531 | token = strsep(&b, " "); | |
532 | if (token == NULL) | |
533 | return -EINVAL; | |
534 | if (strlen(token) >= MAX_NAME_LEN) | |
535 | return -EINVAL; | |
536 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
537 | ||
538 | /* get arg 'pin_name' */ | |
539 | token = strsep(&b, " "); | |
540 | if (token == NULL) | |
541 | return -EINVAL; | |
542 | if (strlen(token) >= MAX_NAME_LEN) | |
543 | return -EINVAL; | |
544 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
545 | ||
546 | /* get new_value of config' */ | |
547 | token = strsep(&b, " "); | |
548 | if (token == NULL) | |
549 | return -EINVAL; | |
550 | if (strlen(token) >= MAX_NAME_LEN) | |
551 | return -EINVAL; | |
552 | strncpy(config, token, MAX_NAME_LEN); | |
553 | ||
42fed7ba | 554 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
555 | |
556 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
557 | for_each_maps(maps_node, i, map) { | |
558 | if (strcmp(map->dev_name, dbg->dev_name)) | |
559 | continue; | |
560 | if (map->type != dbg->map_type) | |
561 | continue; | |
562 | if (strcmp(map->name, dbg->state_name)) | |
563 | continue; | |
564 | ||
565 | /* we found the right pin / state, so overwrite config */ | |
566 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
8a9dcc3f | 567 | found = map; |
f07512e6 LM |
568 | break; |
569 | } | |
570 | } | |
571 | ||
572 | if (!found) { | |
f07512e6 | 573 | count = -EINVAL; |
cb6d315d | 574 | goto exit; |
f07512e6 LM |
575 | } |
576 | ||
8a9dcc3f | 577 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
f07512e6 LM |
578 | if (pctldev) |
579 | confops = pctldev->desc->confops; | |
580 | ||
581 | if (confops && confops->pin_config_dbg_parse_modify) { | |
8a9dcc3f | 582 | configs = &found->data.configs; |
f07512e6 LM |
583 | for (i = 0; i < configs->num_configs; i++) { |
584 | confops->pin_config_dbg_parse_modify(pctldev, | |
585 | config, | |
586 | &configs->configs[i]); | |
587 | } | |
588 | } | |
589 | ||
590 | exit: | |
42fed7ba | 591 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
592 | |
593 | return count; | |
594 | } | |
595 | ||
596 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
597 | { | |
598 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
599 | } | |
600 | ||
601 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
602 | .open = pinconf_dbg_config_open, | |
603 | .write = pinconf_dbg_config_write, | |
604 | .read = seq_read, | |
605 | .llseek = seq_lseek, | |
606 | .release = single_release, | |
607 | .owner = THIS_MODULE, | |
608 | }; | |
609 | ||
ae6b4d85 LW |
610 | void pinconf_init_device_debugfs(struct dentry *devroot, |
611 | struct pinctrl_dev *pctldev) | |
612 | { | |
613 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
614 | devroot, pctldev, &pinconf_pins_ops); | |
615 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
616 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
617 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
618 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
619 | } |
620 | ||
621 | #endif |