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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 | ||
15381bc7 MW |
203 | int pinconf_set_config(struct pinctrl_dev *pctldev, unsigned pin, |
204 | unsigned long *configs, size_t nconfigs) | |
205 | { | |
206 | const struct pinconf_ops *ops; | |
207 | ||
208 | ops = pctldev->desc->confops; | |
209 | if (!ops) | |
210 | return -ENOTSUPP; | |
211 | ||
212 | return ops->pin_config_set(pctldev, pin, configs, nconfigs); | |
213 | } | |
214 | ||
ae6b4d85 LW |
215 | #ifdef CONFIG_DEBUG_FS |
216 | ||
6de52c15 | 217 | static void pinconf_show_config(struct seq_file *s, struct pinctrl_dev *pctldev, |
d96310ae | 218 | unsigned long *configs, unsigned num_configs) |
1e2082b5 | 219 | { |
6cb41587 | 220 | const struct pinconf_ops *confops; |
1e2082b5 SW |
221 | int i; |
222 | ||
6cb41587 SW |
223 | if (pctldev) |
224 | confops = pctldev->desc->confops; | |
225 | else | |
226 | confops = NULL; | |
227 | ||
d96310ae JH |
228 | for (i = 0; i < num_configs; i++) { |
229 | seq_puts(s, "config "); | |
230 | if (confops && confops->pin_config_config_dbg_show) | |
231 | confops->pin_config_config_dbg_show(pctldev, s, | |
232 | configs[i]); | |
233 | else | |
234 | seq_printf(s, "%08lx", configs[i]); | |
235 | seq_puts(s, "\n"); | |
236 | } | |
237 | } | |
238 | ||
239 | void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map) | |
240 | { | |
241 | struct pinctrl_dev *pctldev; | |
242 | ||
243 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); | |
244 | ||
1e2082b5 SW |
245 | switch (map->type) { |
246 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
247 | seq_printf(s, "pin "); | |
248 | break; | |
249 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
250 | seq_printf(s, "group "); | |
251 | break; | |
252 | default: | |
253 | break; | |
254 | } | |
255 | ||
256 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
257 | ||
d96310ae JH |
258 | pinconf_show_config(s, pctldev, map->data.configs.configs, |
259 | map->data.configs.num_configs); | |
1e2082b5 SW |
260 | } |
261 | ||
262 | void pinconf_show_setting(struct seq_file *s, | |
263 | struct pinctrl_setting const *setting) | |
264 | { | |
265 | struct pinctrl_dev *pctldev = setting->pctldev; | |
266 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
267 | struct pin_desc *desc; | |
1e2082b5 SW |
268 | |
269 | switch (setting->type) { | |
270 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
271 | desc = pin_desc_get(setting->pctldev, | |
272 | setting->data.configs.group_or_pin); | |
cf9d994d | 273 | seq_printf(s, "pin %s (%d)", desc->name, |
1e2082b5 SW |
274 | setting->data.configs.group_or_pin); |
275 | break; | |
276 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
277 | seq_printf(s, "group %s (%d)", | |
278 | pctlops->get_group_name(pctldev, | |
279 | setting->data.configs.group_or_pin), | |
280 | setting->data.configs.group_or_pin); | |
281 | break; | |
282 | default: | |
283 | break; | |
284 | } | |
285 | ||
286 | /* | |
287 | * FIXME: We should really get the pin controler to dump the config | |
288 | * values, so they can be decoded to something meaningful. | |
289 | */ | |
d96310ae JH |
290 | pinconf_show_config(s, pctldev, setting->data.configs.configs, |
291 | setting->data.configs.num_configs); | |
1e2082b5 SW |
292 | } |
293 | ||
ae6b4d85 LW |
294 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
295 | struct seq_file *s, int pin) | |
296 | { | |
297 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
298 | ||
394349f7 | 299 | /* no-op when not using generic pin config */ |
dd4d01f7 | 300 | pinconf_generic_dump_pins(pctldev, s, NULL, pin); |
ae6b4d85 LW |
301 | if (ops && ops->pin_config_dbg_show) |
302 | ops->pin_config_dbg_show(pctldev, s, pin); | |
303 | } | |
304 | ||
305 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
306 | { | |
307 | struct pinctrl_dev *pctldev = s->private; | |
706e8520 | 308 | unsigned i, pin; |
ae6b4d85 LW |
309 | |
310 | seq_puts(s, "Pin config settings per pin\n"); | |
2aeefe02 | 311 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 312 | |
42fed7ba | 313 | mutex_lock(&pctldev->mutex); |
57b676f9 | 314 | |
706e8520 | 315 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 316 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
317 | struct pin_desc *desc; |
318 | ||
706e8520 | 319 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 320 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 321 | /* Skip if we cannot search the pin */ |
ae6b4d85 LW |
322 | if (desc == NULL) |
323 | continue; | |
324 | ||
a672eb5e | 325 | seq_printf(s, "pin %d (%s): ", pin, desc->name); |
ae6b4d85 LW |
326 | |
327 | pinconf_dump_pin(pctldev, s, pin); | |
328 | ||
329 | seq_printf(s, "\n"); | |
330 | } | |
331 | ||
42fed7ba | 332 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 333 | |
ae6b4d85 LW |
334 | return 0; |
335 | } | |
336 | ||
337 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
338 | struct seq_file *s, unsigned selector, | |
339 | const char *gname) | |
340 | { | |
341 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
342 | ||
394349f7 | 343 | /* no-op when not using generic pin config */ |
dd4d01f7 | 344 | pinconf_generic_dump_pins(pctldev, s, gname, 0); |
ae6b4d85 LW |
345 | if (ops && ops->pin_config_group_dbg_show) |
346 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
347 | } | |
348 | ||
349 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
350 | { | |
351 | struct pinctrl_dev *pctldev = s->private; | |
352 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
d1e90e9e | 353 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
354 | unsigned selector = 0; |
355 | ||
ae6b4d85 | 356 | seq_puts(s, "Pin config settings per pin group\n"); |
2aeefe02 | 357 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 358 | |
d1e90e9e | 359 | while (selector < ngroups) { |
ae6b4d85 LW |
360 | const char *gname = pctlops->get_group_name(pctldev, selector); |
361 | ||
a672eb5e | 362 | seq_printf(s, "%u (%s): ", selector, gname); |
ae6b4d85 | 363 | pinconf_dump_group(pctldev, s, selector, gname); |
f7b9006f SW |
364 | seq_printf(s, "\n"); |
365 | ||
ae6b4d85 LW |
366 | selector++; |
367 | } | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
373 | { | |
374 | return single_open(file, pinconf_pins_show, inode->i_private); | |
375 | } | |
376 | ||
377 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
378 | { | |
379 | return single_open(file, pinconf_groups_show, inode->i_private); | |
380 | } | |
381 | ||
382 | static const struct file_operations pinconf_pins_ops = { | |
383 | .open = pinconf_pins_open, | |
384 | .read = seq_read, | |
385 | .llseek = seq_lseek, | |
386 | .release = single_release, | |
387 | }; | |
388 | ||
389 | static const struct file_operations pinconf_groups_ops = { | |
390 | .open = pinconf_groups_open, | |
391 | .read = seq_read, | |
392 | .llseek = seq_lseek, | |
393 | .release = single_release, | |
394 | }; | |
395 | ||
f07512e6 LM |
396 | #define MAX_NAME_LEN 15 |
397 | ||
398 | struct dbg_cfg { | |
399 | enum pinctrl_map_type map_type; | |
400 | char dev_name[MAX_NAME_LEN+1]; | |
401 | char state_name[MAX_NAME_LEN+1]; | |
402 | char pin_name[MAX_NAME_LEN+1]; | |
403 | }; | |
404 | ||
405 | /* | |
406 | * Goal is to keep this structure as global in order to simply read the | |
407 | * pinconf-config file after a write to check config is as expected | |
408 | */ | |
409 | static struct dbg_cfg pinconf_dbg_conf; | |
410 | ||
411 | /** | |
412 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
413 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
414 | * @s: string filled in with config description | |
415 | * @d: not used | |
416 | */ | |
417 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
418 | { | |
419 | struct pinctrl_maps *maps_node; | |
420 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
421 | const struct pinctrl_map *found = NULL; |
422 | struct pinctrl_dev *pctldev; | |
f07512e6 | 423 | struct dbg_cfg *dbg = &pinconf_dbg_conf; |
d99c8053 | 424 | int i; |
f07512e6 | 425 | |
a386267a | 426 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
427 | |
428 | /* Parse the pinctrl map and look for the elected pin/state */ | |
429 | for_each_maps(maps_node, i, map) { | |
430 | if (map->type != dbg->map_type) | |
431 | continue; | |
432 | if (strcmp(map->dev_name, dbg->dev_name)) | |
433 | continue; | |
434 | if (strcmp(map->name, dbg->state_name)) | |
435 | continue; | |
436 | ||
d99c8053 LM |
437 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { |
438 | /* We found the right pin */ | |
439 | found = map; | |
440 | break; | |
f07512e6 LM |
441 | } |
442 | } | |
443 | ||
444 | if (!found) { | |
445 | seq_printf(s, "No config found for dev/state/pin, expected:\n"); | |
446 | seq_printf(s, "Searched dev:%s\n", dbg->dev_name); | |
447 | seq_printf(s, "Searched state:%s\n", dbg->state_name); | |
448 | seq_printf(s, "Searched pin:%s\n", dbg->pin_name); | |
449 | seq_printf(s, "Use: modify config_pin <devname> "\ | |
450 | "<state> <pinname> <value>\n"); | |
451 | goto exit; | |
452 | } | |
453 | ||
8a9dcc3f | 454 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
d96310ae JH |
455 | seq_printf(s, "Dev %s has config of %s in state %s:\n", |
456 | dbg->dev_name, dbg->pin_name, dbg->state_name); | |
457 | pinconf_show_config(s, pctldev, found->data.configs.configs, | |
458 | found->data.configs.num_configs); | |
f07512e6 LM |
459 | |
460 | exit: | |
a386267a | 461 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
462 | |
463 | return 0; | |
464 | } | |
465 | ||
466 | /** | |
467 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
468 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
469 | * @user_buf: contains the modification request with expected format: | |
75629981 | 470 | * modify <config> <devicename> <state> <name> <newvalue> |
f07512e6 | 471 | * modify is literal string, alternatives like add/delete not supported yet |
75629981 JH |
472 | * <config> is the configuration to be changed. Supported configs are |
473 | * "config_pin" or "config_group", alternatives like config_mux are not | |
474 | * supported yet. | |
475 | * <devicename> <state> <name> are values that should match the pinctrl-maps | |
f07512e6 LM |
476 | * <newvalue> reflects the new config and is driver dependant |
477 | */ | |
3b59e432 | 478 | static ssize_t pinconf_dbg_config_write(struct file *file, |
f07512e6 LM |
479 | const char __user *user_buf, size_t count, loff_t *ppos) |
480 | { | |
481 | struct pinctrl_maps *maps_node; | |
482 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
483 | const struct pinctrl_map *found = NULL; |
484 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
485 | const struct pinconf_ops *confops = NULL; |
486 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
487 | const struct pinctrl_map_configs *configs; | |
488 | char config[MAX_NAME_LEN+1]; | |
f07512e6 LM |
489 | char buf[128]; |
490 | char *b = &buf[0]; | |
491 | int buf_size; | |
492 | char *token; | |
493 | int i; | |
494 | ||
495 | /* Get userspace string and assure termination */ | |
81d36c4f | 496 | buf_size = min(count, sizeof(buf) - 1); |
f07512e6 LM |
497 | if (copy_from_user(buf, user_buf, buf_size)) |
498 | return -EFAULT; | |
499 | buf[buf_size] = 0; | |
500 | ||
501 | /* | |
502 | * need to parse entry and extract parameters: | |
503 | * modify configs_pin devicename state pinname newvalue | |
504 | */ | |
505 | ||
506 | /* Get arg: 'modify' */ | |
507 | token = strsep(&b, " "); | |
508 | if (!token) | |
509 | return -EINVAL; | |
510 | if (strcmp(token, "modify")) | |
511 | return -EINVAL; | |
512 | ||
75629981 JH |
513 | /* |
514 | * Get arg type: "config_pin" and "config_group" | |
515 | * types are supported so far | |
516 | */ | |
f07512e6 LM |
517 | token = strsep(&b, " "); |
518 | if (!token) | |
519 | return -EINVAL; | |
75629981 JH |
520 | if (!strcmp(token, "config_pin")) |
521 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
522 | else if (!strcmp(token, "config_group")) | |
523 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_GROUP; | |
524 | else | |
f07512e6 | 525 | return -EINVAL; |
f07512e6 LM |
526 | |
527 | /* get arg 'device_name' */ | |
528 | token = strsep(&b, " "); | |
529 | if (token == NULL) | |
530 | return -EINVAL; | |
531 | if (strlen(token) >= MAX_NAME_LEN) | |
532 | return -EINVAL; | |
533 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
534 | ||
535 | /* get arg 'state_name' */ | |
536 | token = strsep(&b, " "); | |
537 | if (token == NULL) | |
538 | return -EINVAL; | |
539 | if (strlen(token) >= MAX_NAME_LEN) | |
540 | return -EINVAL; | |
541 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
542 | ||
543 | /* get arg 'pin_name' */ | |
544 | token = strsep(&b, " "); | |
545 | if (token == NULL) | |
546 | return -EINVAL; | |
547 | if (strlen(token) >= MAX_NAME_LEN) | |
548 | return -EINVAL; | |
549 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
550 | ||
551 | /* get new_value of config' */ | |
552 | token = strsep(&b, " "); | |
553 | if (token == NULL) | |
554 | return -EINVAL; | |
555 | if (strlen(token) >= MAX_NAME_LEN) | |
556 | return -EINVAL; | |
557 | strncpy(config, token, MAX_NAME_LEN); | |
558 | ||
42fed7ba | 559 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
560 | |
561 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
562 | for_each_maps(maps_node, i, map) { | |
563 | if (strcmp(map->dev_name, dbg->dev_name)) | |
564 | continue; | |
565 | if (map->type != dbg->map_type) | |
566 | continue; | |
567 | if (strcmp(map->name, dbg->state_name)) | |
568 | continue; | |
569 | ||
570 | /* we found the right pin / state, so overwrite config */ | |
571 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
8a9dcc3f | 572 | found = map; |
f07512e6 LM |
573 | break; |
574 | } | |
575 | } | |
576 | ||
577 | if (!found) { | |
f07512e6 | 578 | count = -EINVAL; |
cb6d315d | 579 | goto exit; |
f07512e6 LM |
580 | } |
581 | ||
8a9dcc3f | 582 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
f07512e6 LM |
583 | if (pctldev) |
584 | confops = pctldev->desc->confops; | |
585 | ||
586 | if (confops && confops->pin_config_dbg_parse_modify) { | |
8a9dcc3f | 587 | configs = &found->data.configs; |
f07512e6 LM |
588 | for (i = 0; i < configs->num_configs; i++) { |
589 | confops->pin_config_dbg_parse_modify(pctldev, | |
590 | config, | |
591 | &configs->configs[i]); | |
592 | } | |
593 | } | |
594 | ||
595 | exit: | |
42fed7ba | 596 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
597 | |
598 | return count; | |
599 | } | |
600 | ||
601 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
602 | { | |
603 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
604 | } | |
605 | ||
606 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
607 | .open = pinconf_dbg_config_open, | |
608 | .write = pinconf_dbg_config_write, | |
609 | .read = seq_read, | |
610 | .llseek = seq_lseek, | |
611 | .release = single_release, | |
612 | .owner = THIS_MODULE, | |
613 | }; | |
614 | ||
ae6b4d85 LW |
615 | void pinconf_init_device_debugfs(struct dentry *devroot, |
616 | struct pinctrl_dev *pctldev) | |
617 | { | |
618 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
619 | devroot, pctldev, &pinconf_pins_ops); | |
620 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
621 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
622 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
623 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
624 | } |
625 | ||
626 | #endif |