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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; | |
03b054e9 | 161 | int ret; |
1e2082b5 SW |
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 | } | |
03b054e9 SY |
174 | ret = ops->pin_config_set(pctldev, |
175 | setting->data.configs.group_or_pin, | |
176 | setting->data.configs.configs, | |
177 | setting->data.configs.num_configs); | |
178 | if (ret < 0) { | |
179 | dev_err(pctldev->dev, | |
180 | "pin_config_set op failed for pin %d\n", | |
181 | setting->data.configs.group_or_pin); | |
182 | return ret; | |
1e2082b5 SW |
183 | } |
184 | break; | |
185 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
186 | if (!ops->pin_config_group_set) { | |
187 | dev_err(pctldev->dev, | |
188 | "missing pin_config_group_set op\n"); | |
189 | return -EINVAL; | |
190 | } | |
03b054e9 SY |
191 | ret = ops->pin_config_group_set(pctldev, |
192 | setting->data.configs.group_or_pin, | |
193 | setting->data.configs.configs, | |
194 | setting->data.configs.num_configs); | |
195 | if (ret < 0) { | |
196 | dev_err(pctldev->dev, | |
197 | "pin_config_group_set op failed for group %d\n", | |
198 | setting->data.configs.group_or_pin); | |
199 | return ret; | |
1e2082b5 SW |
200 | } |
201 | break; | |
202 | default: | |
203 | return -EINVAL; | |
204 | } | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
ae6b4d85 LW |
209 | #ifdef CONFIG_DEBUG_FS |
210 | ||
1e2082b5 SW |
211 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) |
212 | { | |
6cb41587 SW |
213 | struct pinctrl_dev *pctldev; |
214 | const struct pinconf_ops *confops; | |
1e2082b5 SW |
215 | int i; |
216 | ||
6cb41587 SW |
217 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); |
218 | if (pctldev) | |
219 | confops = pctldev->desc->confops; | |
220 | else | |
221 | confops = NULL; | |
222 | ||
1e2082b5 SW |
223 | switch (map->type) { |
224 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
225 | seq_printf(s, "pin "); | |
226 | break; | |
227 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
228 | seq_printf(s, "group "); | |
229 | break; | |
230 | default: | |
231 | break; | |
232 | } | |
233 | ||
234 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
235 | ||
6cb41587 SW |
236 | for (i = 0; i < map->data.configs.num_configs; i++) { |
237 | seq_printf(s, "config "); | |
238 | if (confops && confops->pin_config_config_dbg_show) | |
239 | confops->pin_config_config_dbg_show(pctldev, s, | |
240 | map->data.configs.configs[i]); | |
241 | else | |
242 | seq_printf(s, "%08lx", map->data.configs.configs[i]); | |
243 | seq_printf(s, "\n"); | |
244 | } | |
1e2082b5 SW |
245 | } |
246 | ||
247 | void pinconf_show_setting(struct seq_file *s, | |
248 | struct pinctrl_setting const *setting) | |
249 | { | |
250 | struct pinctrl_dev *pctldev = setting->pctldev; | |
251 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
6cb41587 | 252 | const struct pinconf_ops *confops = pctldev->desc->confops; |
1e2082b5 SW |
253 | struct pin_desc *desc; |
254 | int i; | |
255 | ||
256 | switch (setting->type) { | |
257 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
258 | desc = pin_desc_get(setting->pctldev, | |
259 | setting->data.configs.group_or_pin); | |
260 | seq_printf(s, "pin %s (%d)", | |
261 | desc->name ? desc->name : "unnamed", | |
262 | setting->data.configs.group_or_pin); | |
263 | break; | |
264 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
265 | seq_printf(s, "group %s (%d)", | |
266 | pctlops->get_group_name(pctldev, | |
267 | setting->data.configs.group_or_pin), | |
268 | setting->data.configs.group_or_pin); | |
269 | break; | |
270 | default: | |
271 | break; | |
272 | } | |
273 | ||
274 | /* | |
275 | * FIXME: We should really get the pin controler to dump the config | |
276 | * values, so they can be decoded to something meaningful. | |
277 | */ | |
6cb41587 SW |
278 | for (i = 0; i < setting->data.configs.num_configs; i++) { |
279 | seq_printf(s, " "); | |
280 | if (confops && confops->pin_config_config_dbg_show) | |
281 | confops->pin_config_config_dbg_show(pctldev, s, | |
282 | setting->data.configs.configs[i]); | |
283 | else | |
284 | seq_printf(s, "%08lx", | |
285 | setting->data.configs.configs[i]); | |
286 | } | |
1e2082b5 SW |
287 | |
288 | seq_printf(s, "\n"); | |
289 | } | |
290 | ||
ae6b4d85 LW |
291 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
292 | struct seq_file *s, int pin) | |
293 | { | |
294 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
295 | ||
394349f7 LW |
296 | /* no-op when not using generic pin config */ |
297 | pinconf_generic_dump_pin(pctldev, s, pin); | |
ae6b4d85 LW |
298 | if (ops && ops->pin_config_dbg_show) |
299 | ops->pin_config_dbg_show(pctldev, s, pin); | |
300 | } | |
301 | ||
302 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
303 | { | |
304 | struct pinctrl_dev *pctldev = s->private; | |
ad8bb720 | 305 | const struct pinconf_ops *ops = pctldev->desc->confops; |
706e8520 | 306 | unsigned i, pin; |
ae6b4d85 | 307 | |
ad8bb720 DA |
308 | if (!ops || !ops->pin_config_get) |
309 | return 0; | |
310 | ||
ae6b4d85 | 311 | seq_puts(s, "Pin config settings per pin\n"); |
2aeefe02 | 312 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 313 | |
42fed7ba | 314 | mutex_lock(&pctldev->mutex); |
57b676f9 | 315 | |
706e8520 | 316 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 317 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
318 | struct pin_desc *desc; |
319 | ||
706e8520 | 320 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 321 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 322 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
323 | if (desc == NULL) |
324 | continue; | |
325 | ||
326 | seq_printf(s, "pin %d (%s):", pin, | |
327 | desc->name ? desc->name : "unnamed"); | |
328 | ||
329 | pinconf_dump_pin(pctldev, s, pin); | |
330 | ||
331 | seq_printf(s, "\n"); | |
332 | } | |
333 | ||
42fed7ba | 334 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 335 | |
ae6b4d85 LW |
336 | return 0; |
337 | } | |
338 | ||
339 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
340 | struct seq_file *s, unsigned selector, | |
341 | const char *gname) | |
342 | { | |
343 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
344 | ||
394349f7 LW |
345 | /* no-op when not using generic pin config */ |
346 | pinconf_generic_dump_group(pctldev, s, gname); | |
ae6b4d85 LW |
347 | if (ops && ops->pin_config_group_dbg_show) |
348 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
349 | } | |
350 | ||
351 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
352 | { | |
353 | struct pinctrl_dev *pctldev = s->private; | |
354 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
355 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
d1e90e9e | 356 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
357 | unsigned selector = 0; |
358 | ||
359 | if (!ops || !ops->pin_config_group_get) | |
360 | return 0; | |
361 | ||
362 | seq_puts(s, "Pin config settings per pin group\n"); | |
2aeefe02 | 363 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 364 | |
d1e90e9e | 365 | while (selector < ngroups) { |
ae6b4d85 LW |
366 | const char *gname = pctlops->get_group_name(pctldev, selector); |
367 | ||
368 | seq_printf(s, "%u (%s):", selector, gname); | |
369 | pinconf_dump_group(pctldev, s, selector, gname); | |
f7b9006f SW |
370 | seq_printf(s, "\n"); |
371 | ||
ae6b4d85 LW |
372 | selector++; |
373 | } | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
379 | { | |
380 | return single_open(file, pinconf_pins_show, inode->i_private); | |
381 | } | |
382 | ||
383 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
384 | { | |
385 | return single_open(file, pinconf_groups_show, inode->i_private); | |
386 | } | |
387 | ||
388 | static const struct file_operations pinconf_pins_ops = { | |
389 | .open = pinconf_pins_open, | |
390 | .read = seq_read, | |
391 | .llseek = seq_lseek, | |
392 | .release = single_release, | |
393 | }; | |
394 | ||
395 | static const struct file_operations pinconf_groups_ops = { | |
396 | .open = pinconf_groups_open, | |
397 | .read = seq_read, | |
398 | .llseek = seq_lseek, | |
399 | .release = single_release, | |
400 | }; | |
401 | ||
f07512e6 LM |
402 | #define MAX_NAME_LEN 15 |
403 | ||
404 | struct dbg_cfg { | |
405 | enum pinctrl_map_type map_type; | |
406 | char dev_name[MAX_NAME_LEN+1]; | |
407 | char state_name[MAX_NAME_LEN+1]; | |
408 | char pin_name[MAX_NAME_LEN+1]; | |
409 | }; | |
410 | ||
411 | /* | |
412 | * Goal is to keep this structure as global in order to simply read the | |
413 | * pinconf-config file after a write to check config is as expected | |
414 | */ | |
415 | static struct dbg_cfg pinconf_dbg_conf; | |
416 | ||
417 | /** | |
418 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
419 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
420 | * @s: string filled in with config description | |
421 | * @d: not used | |
422 | */ | |
423 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
424 | { | |
425 | struct pinctrl_maps *maps_node; | |
426 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
427 | const struct pinctrl_map *found = NULL; |
428 | struct pinctrl_dev *pctldev; | |
f07512e6 | 429 | const struct pinconf_ops *confops = NULL; |
f07512e6 LM |
430 | struct dbg_cfg *dbg = &pinconf_dbg_conf; |
431 | int i, j; | |
f07512e6 LM |
432 | unsigned long config; |
433 | ||
a386267a | 434 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
435 | |
436 | /* Parse the pinctrl map and look for the elected pin/state */ | |
437 | for_each_maps(maps_node, i, map) { | |
438 | if (map->type != dbg->map_type) | |
439 | continue; | |
440 | if (strcmp(map->dev_name, dbg->dev_name)) | |
441 | continue; | |
442 | if (strcmp(map->name, dbg->state_name)) | |
443 | continue; | |
444 | ||
445 | for (j = 0; j < map->data.configs.num_configs; j++) { | |
446 | if (!strcmp(map->data.configs.group_or_pin, | |
447 | dbg->pin_name)) { | |
8a9dcc3f RKAL |
448 | /* We found the right pin / state */ |
449 | found = map; | |
f07512e6 LM |
450 | break; |
451 | } | |
452 | } | |
453 | } | |
454 | ||
455 | if (!found) { | |
456 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
457 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
458 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
459 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
460 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
461 | "<state> <pinname> <value>\n"); | |
462 | goto exit; | |
463 | } | |
464 | ||
8a9dcc3f RKAL |
465 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
466 | config = *found->data.configs.configs; | |
f07512e6 LM |
467 | seq_printf(s, "Dev %s has config of %s in state %s: 0x%08lX\n", |
468 | dbg->dev_name, dbg->pin_name, | |
469 | dbg->state_name, config); | |
470 | ||
471 | if (pctldev) | |
472 | confops = pctldev->desc->confops; | |
473 | ||
474 | if (confops && confops->pin_config_config_dbg_show) | |
475 | confops->pin_config_config_dbg_show(pctldev, s, config); | |
476 | ||
477 | exit: | |
a386267a | 478 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
479 | |
480 | return 0; | |
481 | } | |
482 | ||
483 | /** | |
484 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
485 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
486 | * @user_buf: contains the modification request with expected format: | |
487 | * modify config_pin <devicename> <state> <pinname> <newvalue> | |
488 | * modify is literal string, alternatives like add/delete not supported yet | |
489 | * config_pin is literal, alternatives like config_mux not supported yet | |
490 | * <devicename> <state> <pinname> are values that should match the pinctrl-maps | |
491 | * <newvalue> reflects the new config and is driver dependant | |
492 | */ | |
3b59e432 | 493 | static ssize_t pinconf_dbg_config_write(struct file *file, |
f07512e6 LM |
494 | const char __user *user_buf, size_t count, loff_t *ppos) |
495 | { | |
496 | struct pinctrl_maps *maps_node; | |
497 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
498 | const struct pinctrl_map *found = NULL; |
499 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
500 | const struct pinconf_ops *confops = NULL; |
501 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
502 | const struct pinctrl_map_configs *configs; | |
503 | char config[MAX_NAME_LEN+1]; | |
f07512e6 LM |
504 | char buf[128]; |
505 | char *b = &buf[0]; | |
506 | int buf_size; | |
507 | char *token; | |
508 | int i; | |
509 | ||
510 | /* Get userspace string and assure termination */ | |
81d36c4f | 511 | buf_size = min(count, sizeof(buf) - 1); |
f07512e6 LM |
512 | if (copy_from_user(buf, user_buf, buf_size)) |
513 | return -EFAULT; | |
514 | buf[buf_size] = 0; | |
515 | ||
516 | /* | |
517 | * need to parse entry and extract parameters: | |
518 | * modify configs_pin devicename state pinname newvalue | |
519 | */ | |
520 | ||
521 | /* Get arg: 'modify' */ | |
522 | token = strsep(&b, " "); | |
523 | if (!token) | |
524 | return -EINVAL; | |
525 | if (strcmp(token, "modify")) | |
526 | return -EINVAL; | |
527 | ||
528 | /* Get arg type: "config_pin" type supported so far */ | |
529 | token = strsep(&b, " "); | |
530 | if (!token) | |
531 | return -EINVAL; | |
532 | if (strcmp(token, "config_pin")) | |
533 | return -EINVAL; | |
534 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
535 | ||
536 | /* get arg 'device_name' */ | |
537 | token = strsep(&b, " "); | |
538 | if (token == NULL) | |
539 | return -EINVAL; | |
540 | if (strlen(token) >= MAX_NAME_LEN) | |
541 | return -EINVAL; | |
542 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
543 | ||
544 | /* get arg 'state_name' */ | |
545 | token = strsep(&b, " "); | |
546 | if (token == NULL) | |
547 | return -EINVAL; | |
548 | if (strlen(token) >= MAX_NAME_LEN) | |
549 | return -EINVAL; | |
550 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
551 | ||
552 | /* get arg 'pin_name' */ | |
553 | token = strsep(&b, " "); | |
554 | if (token == NULL) | |
555 | return -EINVAL; | |
556 | if (strlen(token) >= MAX_NAME_LEN) | |
557 | return -EINVAL; | |
558 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
559 | ||
560 | /* get new_value of config' */ | |
561 | token = strsep(&b, " "); | |
562 | if (token == NULL) | |
563 | return -EINVAL; | |
564 | if (strlen(token) >= MAX_NAME_LEN) | |
565 | return -EINVAL; | |
566 | strncpy(config, token, MAX_NAME_LEN); | |
567 | ||
42fed7ba | 568 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
569 | |
570 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
571 | for_each_maps(maps_node, i, map) { | |
572 | if (strcmp(map->dev_name, dbg->dev_name)) | |
573 | continue; | |
574 | if (map->type != dbg->map_type) | |
575 | continue; | |
576 | if (strcmp(map->name, dbg->state_name)) | |
577 | continue; | |
578 | ||
579 | /* we found the right pin / state, so overwrite config */ | |
580 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
8a9dcc3f | 581 | found = map; |
f07512e6 LM |
582 | break; |
583 | } | |
584 | } | |
585 | ||
586 | if (!found) { | |
f07512e6 | 587 | count = -EINVAL; |
cb6d315d | 588 | goto exit; |
f07512e6 LM |
589 | } |
590 | ||
8a9dcc3f | 591 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
f07512e6 LM |
592 | if (pctldev) |
593 | confops = pctldev->desc->confops; | |
594 | ||
595 | if (confops && confops->pin_config_dbg_parse_modify) { | |
8a9dcc3f | 596 | configs = &found->data.configs; |
f07512e6 LM |
597 | for (i = 0; i < configs->num_configs; i++) { |
598 | confops->pin_config_dbg_parse_modify(pctldev, | |
599 | config, | |
600 | &configs->configs[i]); | |
601 | } | |
602 | } | |
603 | ||
604 | exit: | |
42fed7ba | 605 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
606 | |
607 | return count; | |
608 | } | |
609 | ||
610 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
611 | { | |
612 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
613 | } | |
614 | ||
615 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
616 | .open = pinconf_dbg_config_open, | |
617 | .write = pinconf_dbg_config_write, | |
618 | .read = seq_read, | |
619 | .llseek = seq_lseek, | |
620 | .release = single_release, | |
621 | .owner = THIS_MODULE, | |
622 | }; | |
623 | ||
ae6b4d85 LW |
624 | void pinconf_init_device_debugfs(struct dentry *devroot, |
625 | struct pinctrl_dev *pctldev) | |
626 | { | |
627 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
628 | devroot, pctldev, &pinconf_pins_ops); | |
629 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
630 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
631 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
632 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
633 | } |
634 | ||
635 | #endif |