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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 | ||
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) { | |
ca67f10f MY |
64 | dev_dbg(pctldev->dev, |
65 | "cannot get pin configuration, .pin_config_get missing 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 | ||
6de52c15 | 205 | static void pinconf_show_config(struct seq_file *s, struct pinctrl_dev *pctldev, |
d96310ae | 206 | unsigned long *configs, unsigned num_configs) |
1e2082b5 | 207 | { |
6cb41587 | 208 | const struct pinconf_ops *confops; |
1e2082b5 SW |
209 | int i; |
210 | ||
6cb41587 SW |
211 | if (pctldev) |
212 | confops = pctldev->desc->confops; | |
213 | else | |
214 | confops = NULL; | |
215 | ||
d96310ae JH |
216 | for (i = 0; i < num_configs; i++) { |
217 | seq_puts(s, "config "); | |
218 | if (confops && confops->pin_config_config_dbg_show) | |
219 | confops->pin_config_config_dbg_show(pctldev, s, | |
220 | configs[i]); | |
221 | else | |
222 | seq_printf(s, "%08lx", configs[i]); | |
223 | seq_puts(s, "\n"); | |
224 | } | |
225 | } | |
226 | ||
227 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) | |
228 | { | |
229 | struct pinctrl_dev *pctldev; | |
230 | ||
231 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); | |
232 | ||
1e2082b5 SW |
233 | switch (map->type) { |
234 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
235 | seq_printf(s, "pin "); | |
236 | break; | |
237 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
238 | seq_printf(s, "group "); | |
239 | break; | |
240 | default: | |
241 | break; | |
242 | } | |
243 | ||
244 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
245 | ||
d96310ae JH |
246 | pinconf_show_config(s, pctldev, map->data.configs.configs, |
247 | map->data.configs.num_configs); | |
1e2082b5 SW |
248 | } |
249 | ||
250 | void pinconf_show_setting(struct seq_file *s, | |
251 | struct pinctrl_setting const *setting) | |
252 | { | |
253 | struct pinctrl_dev *pctldev = setting->pctldev; | |
254 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
255 | struct pin_desc *desc; | |
1e2082b5 SW |
256 | |
257 | switch (setting->type) { | |
258 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
259 | desc = pin_desc_get(setting->pctldev, | |
260 | setting->data.configs.group_or_pin); | |
261 | seq_printf(s, "pin %s (%d)", | |
262 | desc->name ? desc->name : "unnamed", | |
263 | setting->data.configs.group_or_pin); | |
264 | break; | |
265 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
266 | seq_printf(s, "group %s (%d)", | |
267 | pctlops->get_group_name(pctldev, | |
268 | setting->data.configs.group_or_pin), | |
269 | setting->data.configs.group_or_pin); | |
270 | break; | |
271 | default: | |
272 | break; | |
273 | } | |
274 | ||
275 | /* | |
276 | * FIXME: We should really get the pin controler to dump the config | |
277 | * values, so they can be decoded to something meaningful. | |
278 | */ | |
d96310ae JH |
279 | pinconf_show_config(s, pctldev, setting->data.configs.configs, |
280 | setting->data.configs.num_configs); | |
1e2082b5 SW |
281 | } |
282 | ||
ae6b4d85 LW |
283 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
284 | struct seq_file *s, int pin) | |
285 | { | |
286 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
287 | ||
394349f7 | 288 | /* no-op when not using generic pin config */ |
dd4d01f7 | 289 | pinconf_generic_dump_pins(pctldev, s, NULL, pin); |
ae6b4d85 LW |
290 | if (ops && ops->pin_config_dbg_show) |
291 | ops->pin_config_dbg_show(pctldev, s, pin); | |
292 | } | |
293 | ||
294 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
295 | { | |
296 | struct pinctrl_dev *pctldev = s->private; | |
706e8520 | 297 | unsigned i, pin; |
ae6b4d85 LW |
298 | |
299 | seq_puts(s, "Pin config settings per pin\n"); | |
2aeefe02 | 300 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 301 | |
42fed7ba | 302 | mutex_lock(&pctldev->mutex); |
57b676f9 | 303 | |
706e8520 | 304 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 305 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
306 | struct pin_desc *desc; |
307 | ||
706e8520 | 308 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 309 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 310 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
311 | if (desc == NULL) |
312 | continue; | |
313 | ||
314 | seq_printf(s, "pin %d (%s):", pin, | |
315 | desc->name ? desc->name : "unnamed"); | |
316 | ||
317 | pinconf_dump_pin(pctldev, s, pin); | |
318 | ||
319 | seq_printf(s, "\n"); | |
320 | } | |
321 | ||
42fed7ba | 322 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 323 | |
ae6b4d85 LW |
324 | return 0; |
325 | } | |
326 | ||
327 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
328 | struct seq_file *s, unsigned selector, | |
329 | const char *gname) | |
330 | { | |
331 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
332 | ||
394349f7 | 333 | /* no-op when not using generic pin config */ |
dd4d01f7 | 334 | pinconf_generic_dump_pins(pctldev, s, gname, 0); |
ae6b4d85 LW |
335 | if (ops && ops->pin_config_group_dbg_show) |
336 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
337 | } | |
338 | ||
339 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
340 | { | |
341 | struct pinctrl_dev *pctldev = s->private; | |
342 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
d1e90e9e | 343 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
344 | unsigned selector = 0; |
345 | ||
ae6b4d85 | 346 | seq_puts(s, "Pin config settings per pin group\n"); |
2aeefe02 | 347 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 348 | |
d1e90e9e | 349 | while (selector < ngroups) { |
ae6b4d85 LW |
350 | const char *gname = pctlops->get_group_name(pctldev, selector); |
351 | ||
352 | seq_printf(s, "%u (%s):", selector, gname); | |
353 | pinconf_dump_group(pctldev, s, selector, gname); | |
f7b9006f SW |
354 | seq_printf(s, "\n"); |
355 | ||
ae6b4d85 LW |
356 | selector++; |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
363 | { | |
364 | return single_open(file, pinconf_pins_show, inode->i_private); | |
365 | } | |
366 | ||
367 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
368 | { | |
369 | return single_open(file, pinconf_groups_show, inode->i_private); | |
370 | } | |
371 | ||
372 | static const struct file_operations pinconf_pins_ops = { | |
373 | .open = pinconf_pins_open, | |
374 | .read = seq_read, | |
375 | .llseek = seq_lseek, | |
376 | .release = single_release, | |
377 | }; | |
378 | ||
379 | static const struct file_operations pinconf_groups_ops = { | |
380 | .open = pinconf_groups_open, | |
381 | .read = seq_read, | |
382 | .llseek = seq_lseek, | |
383 | .release = single_release, | |
384 | }; | |
385 | ||
f07512e6 LM |
386 | #define MAX_NAME_LEN 15 |
387 | ||
388 | struct dbg_cfg { | |
389 | enum pinctrl_map_type map_type; | |
390 | char dev_name[MAX_NAME_LEN+1]; | |
391 | char state_name[MAX_NAME_LEN+1]; | |
392 | char pin_name[MAX_NAME_LEN+1]; | |
393 | }; | |
394 | ||
395 | /* | |
396 | * Goal is to keep this structure as global in order to simply read the | |
397 | * pinconf-config file after a write to check config is as expected | |
398 | */ | |
399 | static struct dbg_cfg pinconf_dbg_conf; | |
400 | ||
401 | /** | |
402 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
403 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
404 | * @s: string filled in with config description | |
405 | * @d: not used | |
406 | */ | |
407 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
408 | { | |
409 | struct pinctrl_maps *maps_node; | |
410 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
411 | const struct pinctrl_map *found = NULL; |
412 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
413 | struct dbg_cfg *dbg = &pinconf_dbg_conf; |
414 | int i, j; | |
f07512e6 | 415 | |
a386267a | 416 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
417 | |
418 | /* Parse the pinctrl map and look for the elected pin/state */ | |
419 | for_each_maps(maps_node, i, map) { | |
420 | if (map->type != dbg->map_type) | |
421 | continue; | |
422 | if (strcmp(map->dev_name, dbg->dev_name)) | |
423 | continue; | |
424 | if (strcmp(map->name, dbg->state_name)) | |
425 | continue; | |
426 | ||
427 | for (j = 0; j < map->data.configs.num_configs; j++) { | |
428 | if (!strcmp(map->data.configs.group_or_pin, | |
429 | dbg->pin_name)) { | |
8a9dcc3f RKAL |
430 | /* We found the right pin / state */ |
431 | found = map; | |
f07512e6 LM |
432 | break; |
433 | } | |
434 | } | |
435 | } | |
436 | ||
437 | if (!found) { | |
438 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
439 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
440 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
441 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
442 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
443 | "<state> <pinname> <value>\n"); | |
444 | goto exit; | |
445 | } | |
446 | ||
8a9dcc3f | 447 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
d96310ae JH |
448 | seq_printf(s, "Dev %s has config of %s in state %s:\n", |
449 | dbg->dev_name, dbg->pin_name, dbg->state_name); | |
450 | pinconf_show_config(s, pctldev, found->data.configs.configs, | |
451 | found->data.configs.num_configs); | |
f07512e6 LM |
452 | |
453 | exit: | |
a386267a | 454 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
455 | |
456 | return 0; | |
457 | } | |
458 | ||
459 | /** | |
460 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
461 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
462 | * @user_buf: contains the modification request with expected format: | |
75629981 | 463 | * modify <config> <devicename> <state> <name> <newvalue> |
f07512e6 | 464 | * modify is literal string, alternatives like add/delete not supported yet |
75629981 JH |
465 | * <config> is the configuration to be changed. Supported configs are |
466 | * "config_pin" or "config_group", alternatives like config_mux are not | |
467 | * supported yet. | |
468 | * <devicename> <state> <name> are values that should match the pinctrl-maps | |
f07512e6 LM |
469 | * <newvalue> reflects the new config and is driver dependant |
470 | */ | |
3b59e432 | 471 | static ssize_t pinconf_dbg_config_write(struct file *file, |
f07512e6 LM |
472 | const char __user *user_buf, size_t count, loff_t *ppos) |
473 | { | |
474 | struct pinctrl_maps *maps_node; | |
475 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
476 | const struct pinctrl_map *found = NULL; |
477 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
478 | const struct pinconf_ops *confops = NULL; |
479 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
480 | const struct pinctrl_map_configs *configs; | |
481 | char config[MAX_NAME_LEN+1]; | |
f07512e6 LM |
482 | char buf[128]; |
483 | char *b = &buf[0]; | |
484 | int buf_size; | |
485 | char *token; | |
486 | int i; | |
487 | ||
488 | /* Get userspace string and assure termination */ | |
81d36c4f | 489 | buf_size = min(count, sizeof(buf) - 1); |
f07512e6 LM |
490 | if (copy_from_user(buf, user_buf, buf_size)) |
491 | return -EFAULT; | |
492 | buf[buf_size] = 0; | |
493 | ||
494 | /* | |
495 | * need to parse entry and extract parameters: | |
496 | * modify configs_pin devicename state pinname newvalue | |
497 | */ | |
498 | ||
499 | /* Get arg: 'modify' */ | |
500 | token = strsep(&b, " "); | |
501 | if (!token) | |
502 | return -EINVAL; | |
503 | if (strcmp(token, "modify")) | |
504 | return -EINVAL; | |
505 | ||
75629981 JH |
506 | /* |
507 | * Get arg type: "config_pin" and "config_group" | |
508 | * types are supported so far | |
509 | */ | |
f07512e6 LM |
510 | token = strsep(&b, " "); |
511 | if (!token) | |
512 | return -EINVAL; | |
75629981 JH |
513 | if (!strcmp(token, "config_pin")) |
514 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
515 | else if (!strcmp(token, "config_group")) | |
516 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_GROUP; | |
517 | else | |
f07512e6 | 518 | return -EINVAL; |
f07512e6 LM |
519 | |
520 | /* get arg 'device_name' */ | |
521 | token = strsep(&b, " "); | |
522 | if (token == NULL) | |
523 | return -EINVAL; | |
524 | if (strlen(token) >= MAX_NAME_LEN) | |
525 | return -EINVAL; | |
526 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
527 | ||
528 | /* get arg 'state_name' */ | |
529 | token = strsep(&b, " "); | |
530 | if (token == NULL) | |
531 | return -EINVAL; | |
532 | if (strlen(token) >= MAX_NAME_LEN) | |
533 | return -EINVAL; | |
534 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
535 | ||
536 | /* get arg 'pin_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->pin_name, token, MAX_NAME_LEN); | |
543 | ||
544 | /* get new_value of config' */ | |
545 | token = strsep(&b, " "); | |
546 | if (token == NULL) | |
547 | return -EINVAL; | |
548 | if (strlen(token) >= MAX_NAME_LEN) | |
549 | return -EINVAL; | |
550 | strncpy(config, token, MAX_NAME_LEN); | |
551 | ||
42fed7ba | 552 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
553 | |
554 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
555 | for_each_maps(maps_node, i, map) { | |
556 | if (strcmp(map->dev_name, dbg->dev_name)) | |
557 | continue; | |
558 | if (map->type != dbg->map_type) | |
559 | continue; | |
560 | if (strcmp(map->name, dbg->state_name)) | |
561 | continue; | |
562 | ||
563 | /* we found the right pin / state, so overwrite config */ | |
564 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
8a9dcc3f | 565 | found = map; |
f07512e6 LM |
566 | break; |
567 | } | |
568 | } | |
569 | ||
570 | if (!found) { | |
f07512e6 | 571 | count = -EINVAL; |
cb6d315d | 572 | goto exit; |
f07512e6 LM |
573 | } |
574 | ||
8a9dcc3f | 575 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
f07512e6 LM |
576 | if (pctldev) |
577 | confops = pctldev->desc->confops; | |
578 | ||
579 | if (confops && confops->pin_config_dbg_parse_modify) { | |
8a9dcc3f | 580 | configs = &found->data.configs; |
f07512e6 LM |
581 | for (i = 0; i < configs->num_configs; i++) { |
582 | confops->pin_config_dbg_parse_modify(pctldev, | |
583 | config, | |
584 | &configs->configs[i]); | |
585 | } | |
586 | } | |
587 | ||
588 | exit: | |
42fed7ba | 589 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
590 | |
591 | return count; | |
592 | } | |
593 | ||
594 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
595 | { | |
596 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
597 | } | |
598 | ||
599 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
600 | .open = pinconf_dbg_config_open, | |
601 | .write = pinconf_dbg_config_write, | |
602 | .read = seq_read, | |
603 | .llseek = seq_lseek, | |
604 | .release = single_release, | |
605 | .owner = THIS_MODULE, | |
606 | }; | |
607 | ||
ae6b4d85 LW |
608 | void pinconf_init_device_debugfs(struct dentry *devroot, |
609 | struct pinctrl_dev *pctldev) | |
610 | { | |
611 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
612 | devroot, pctldev, &pinconf_pins_ops); | |
613 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
614 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
615 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
616 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
617 | } |
618 | ||
619 | #endif |