Commit | Line | Data |
---|---|---|
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 | ||
3f713b7c | 40 | int pinconf_validate_map(const struct pinctrl_map *map, int i) |
1e2082b5 SW |
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) { |
e4d03050 ME |
90 | dev_dbg(pctldev->dev, |
91 | "cannot get configuration for pin group, missing group config get function in driver\n"); | |
c420619d | 92 | ret = -ENOTSUPP; |
57b676f9 | 93 | goto unlock; |
ae6b4d85 LW |
94 | } |
95 | ||
96 | selector = pinctrl_get_group_selector(pctldev, pin_group); | |
57b676f9 SW |
97 | if (selector < 0) { |
98 | ret = selector; | |
99 | goto unlock; | |
100 | } | |
ae6b4d85 | 101 | |
57b676f9 SW |
102 | ret = ops->pin_config_group_get(pctldev, selector, config); |
103 | ||
104 | unlock: | |
42fed7ba | 105 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 106 | return ret; |
ae6b4d85 | 107 | } |
ae6b4d85 | 108 | |
3f713b7c | 109 | int pinconf_map_to_setting(const struct pinctrl_map *map, |
1e2082b5 SW |
110 | struct pinctrl_setting *setting) |
111 | { | |
112 | struct pinctrl_dev *pctldev = setting->pctldev; | |
70b36378 | 113 | int pin; |
1e2082b5 SW |
114 | |
115 | switch (setting->type) { | |
116 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
70b36378 LW |
117 | pin = pin_get_from_name(pctldev, |
118 | map->data.configs.group_or_pin); | |
119 | if (pin < 0) { | |
120 | dev_err(pctldev->dev, "could not map pin config for \"%s\"", | |
121 | map->data.configs.group_or_pin); | |
122 | return pin; | |
123 | } | |
124 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
125 | break; |
126 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
70b36378 LW |
127 | pin = pinctrl_get_group_selector(pctldev, |
128 | map->data.configs.group_or_pin); | |
129 | if (pin < 0) { | |
130 | dev_err(pctldev->dev, "could not map group config for \"%s\"", | |
131 | map->data.configs.group_or_pin); | |
132 | return pin; | |
133 | } | |
134 | setting->data.configs.group_or_pin = pin; | |
1e2082b5 SW |
135 | break; |
136 | default: | |
137 | return -EINVAL; | |
138 | } | |
139 | ||
140 | setting->data.configs.num_configs = map->data.configs.num_configs; | |
141 | setting->data.configs.configs = map->data.configs.configs; | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
3f713b7c | 146 | void pinconf_free_setting(const struct pinctrl_setting *setting) |
1e2082b5 SW |
147 | { |
148 | } | |
149 | ||
3f713b7c | 150 | int pinconf_apply_setting(const struct pinctrl_setting *setting) |
1e2082b5 SW |
151 | { |
152 | struct pinctrl_dev *pctldev = setting->pctldev; | |
153 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
03b054e9 | 154 | int ret; |
1e2082b5 SW |
155 | |
156 | if (!ops) { | |
157 | dev_err(pctldev->dev, "missing confops\n"); | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | switch (setting->type) { | |
162 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
163 | if (!ops->pin_config_set) { | |
164 | dev_err(pctldev->dev, "missing pin_config_set op\n"); | |
165 | return -EINVAL; | |
166 | } | |
03b054e9 SY |
167 | ret = ops->pin_config_set(pctldev, |
168 | setting->data.configs.group_or_pin, | |
169 | setting->data.configs.configs, | |
170 | setting->data.configs.num_configs); | |
171 | if (ret < 0) { | |
172 | dev_err(pctldev->dev, | |
173 | "pin_config_set op failed for pin %d\n", | |
174 | setting->data.configs.group_or_pin); | |
175 | return ret; | |
1e2082b5 SW |
176 | } |
177 | break; | |
178 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
179 | if (!ops->pin_config_group_set) { | |
180 | dev_err(pctldev->dev, | |
181 | "missing pin_config_group_set op\n"); | |
182 | return -EINVAL; | |
183 | } | |
03b054e9 SY |
184 | ret = ops->pin_config_group_set(pctldev, |
185 | setting->data.configs.group_or_pin, | |
186 | setting->data.configs.configs, | |
187 | setting->data.configs.num_configs); | |
188 | if (ret < 0) { | |
189 | dev_err(pctldev->dev, | |
190 | "pin_config_group_set op failed for group %d\n", | |
191 | setting->data.configs.group_or_pin); | |
192 | return ret; | |
1e2082b5 SW |
193 | } |
194 | break; | |
195 | default: | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
15381bc7 MW |
202 | int pinconf_set_config(struct pinctrl_dev *pctldev, unsigned pin, |
203 | unsigned long *configs, size_t nconfigs) | |
204 | { | |
205 | const struct pinconf_ops *ops; | |
206 | ||
207 | ops = pctldev->desc->confops; | |
17a51248 | 208 | if (!ops || !ops->pin_config_set) |
15381bc7 MW |
209 | return -ENOTSUPP; |
210 | ||
211 | return ops->pin_config_set(pctldev, pin, configs, nconfigs); | |
212 | } | |
213 | ||
ae6b4d85 LW |
214 | #ifdef CONFIG_DEBUG_FS |
215 | ||
6de52c15 | 216 | static void pinconf_show_config(struct seq_file *s, struct pinctrl_dev *pctldev, |
d96310ae | 217 | unsigned long *configs, unsigned num_configs) |
1e2082b5 | 218 | { |
6cb41587 | 219 | const struct pinconf_ops *confops; |
1e2082b5 SW |
220 | int i; |
221 | ||
6cb41587 SW |
222 | if (pctldev) |
223 | confops = pctldev->desc->confops; | |
224 | else | |
225 | confops = NULL; | |
226 | ||
d96310ae JH |
227 | for (i = 0; i < num_configs; i++) { |
228 | seq_puts(s, "config "); | |
229 | if (confops && confops->pin_config_config_dbg_show) | |
230 | confops->pin_config_config_dbg_show(pctldev, s, | |
231 | configs[i]); | |
232 | else | |
233 | seq_printf(s, "%08lx", configs[i]); | |
47352a63 | 234 | seq_putc(s, '\n'); |
d96310ae JH |
235 | } |
236 | } | |
237 | ||
3f713b7c | 238 | void pinconf_show_map(struct seq_file *s, const struct pinctrl_map *map) |
d96310ae JH |
239 | { |
240 | struct pinctrl_dev *pctldev; | |
241 | ||
242 | pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); | |
243 | ||
1e2082b5 SW |
244 | switch (map->type) { |
245 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
de2eae26 | 246 | seq_puts(s, "pin "); |
1e2082b5 SW |
247 | break; |
248 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
de2eae26 | 249 | seq_puts(s, "group "); |
1e2082b5 SW |
250 | break; |
251 | default: | |
252 | break; | |
253 | } | |
254 | ||
255 | seq_printf(s, "%s\n", map->data.configs.group_or_pin); | |
256 | ||
d96310ae JH |
257 | pinconf_show_config(s, pctldev, map->data.configs.configs, |
258 | map->data.configs.num_configs); | |
1e2082b5 SW |
259 | } |
260 | ||
261 | void pinconf_show_setting(struct seq_file *s, | |
3f713b7c | 262 | const struct pinctrl_setting *setting) |
1e2082b5 SW |
263 | { |
264 | struct pinctrl_dev *pctldev = setting->pctldev; | |
265 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
266 | struct pin_desc *desc; | |
1e2082b5 SW |
267 | |
268 | switch (setting->type) { | |
269 | case PIN_MAP_TYPE_CONFIGS_PIN: | |
270 | desc = pin_desc_get(setting->pctldev, | |
271 | setting->data.configs.group_or_pin); | |
cf9d994d | 272 | seq_printf(s, "pin %s (%d)", desc->name, |
1e2082b5 SW |
273 | setting->data.configs.group_or_pin); |
274 | break; | |
275 | case PIN_MAP_TYPE_CONFIGS_GROUP: | |
276 | seq_printf(s, "group %s (%d)", | |
277 | pctlops->get_group_name(pctldev, | |
278 | setting->data.configs.group_or_pin), | |
279 | setting->data.configs.group_or_pin); | |
280 | break; | |
281 | default: | |
282 | break; | |
283 | } | |
284 | ||
285 | /* | |
3ec440e3 | 286 | * FIXME: We should really get the pin controller to dump the config |
1e2082b5 SW |
287 | * values, so they can be decoded to something meaningful. |
288 | */ | |
d96310ae JH |
289 | pinconf_show_config(s, pctldev, setting->data.configs.configs, |
290 | setting->data.configs.num_configs); | |
1e2082b5 SW |
291 | } |
292 | ||
ae6b4d85 LW |
293 | static void pinconf_dump_pin(struct pinctrl_dev *pctldev, |
294 | struct seq_file *s, int pin) | |
295 | { | |
296 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
297 | ||
394349f7 | 298 | /* no-op when not using generic pin config */ |
dd4d01f7 | 299 | pinconf_generic_dump_pins(pctldev, s, NULL, pin); |
ae6b4d85 LW |
300 | if (ops && ops->pin_config_dbg_show) |
301 | ops->pin_config_dbg_show(pctldev, s, pin); | |
302 | } | |
303 | ||
304 | static int pinconf_pins_show(struct seq_file *s, void *what) | |
305 | { | |
306 | struct pinctrl_dev *pctldev = s->private; | |
706e8520 | 307 | unsigned i, pin; |
ae6b4d85 LW |
308 | |
309 | seq_puts(s, "Pin config settings per pin\n"); | |
2aeefe02 | 310 | seq_puts(s, "Format: pin (name): configs\n"); |
ae6b4d85 | 311 | |
42fed7ba | 312 | mutex_lock(&pctldev->mutex); |
57b676f9 | 313 | |
706e8520 | 314 | /* The pin number can be retrived from the pin controller descriptor */ |
546edd83 | 315 | for (i = 0; i < pctldev->desc->npins; i++) { |
ae6b4d85 LW |
316 | struct pin_desc *desc; |
317 | ||
706e8520 | 318 | pin = pctldev->desc->pins[i].number; |
ae6b4d85 | 319 | desc = pin_desc_get(pctldev, pin); |
706e8520 | 320 | /* Skip if we cannot search the pin */ |
76ce37f0 | 321 | if (!desc) |
ae6b4d85 LW |
322 | continue; |
323 | ||
a672eb5e | 324 | seq_printf(s, "pin %d (%s): ", pin, desc->name); |
ae6b4d85 LW |
325 | |
326 | pinconf_dump_pin(pctldev, s, pin); | |
47352a63 | 327 | seq_putc(s, '\n'); |
ae6b4d85 LW |
328 | } |
329 | ||
42fed7ba | 330 | mutex_unlock(&pctldev->mutex); |
57b676f9 | 331 | |
ae6b4d85 LW |
332 | return 0; |
333 | } | |
334 | ||
335 | static void pinconf_dump_group(struct pinctrl_dev *pctldev, | |
336 | struct seq_file *s, unsigned selector, | |
337 | const char *gname) | |
338 | { | |
339 | const struct pinconf_ops *ops = pctldev->desc->confops; | |
340 | ||
394349f7 | 341 | /* no-op when not using generic pin config */ |
dd4d01f7 | 342 | pinconf_generic_dump_pins(pctldev, s, gname, 0); |
ae6b4d85 LW |
343 | if (ops && ops->pin_config_group_dbg_show) |
344 | ops->pin_config_group_dbg_show(pctldev, s, selector); | |
345 | } | |
346 | ||
347 | static int pinconf_groups_show(struct seq_file *s, void *what) | |
348 | { | |
349 | struct pinctrl_dev *pctldev = s->private; | |
350 | const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; | |
d1e90e9e | 351 | unsigned ngroups = pctlops->get_groups_count(pctldev); |
ae6b4d85 LW |
352 | unsigned selector = 0; |
353 | ||
ae6b4d85 | 354 | seq_puts(s, "Pin config settings per pin group\n"); |
2aeefe02 | 355 | seq_puts(s, "Format: group (name): configs\n"); |
ae6b4d85 | 356 | |
d1e90e9e | 357 | while (selector < ngroups) { |
ae6b4d85 LW |
358 | const char *gname = pctlops->get_group_name(pctldev, selector); |
359 | ||
a672eb5e | 360 | seq_printf(s, "%u (%s): ", selector, gname); |
ae6b4d85 | 361 | pinconf_dump_group(pctldev, s, selector, gname); |
47352a63 | 362 | seq_putc(s, '\n'); |
ae6b4d85 LW |
363 | selector++; |
364 | } | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | static int pinconf_pins_open(struct inode *inode, struct file *file) | |
370 | { | |
371 | return single_open(file, pinconf_pins_show, inode->i_private); | |
372 | } | |
373 | ||
374 | static int pinconf_groups_open(struct inode *inode, struct file *file) | |
375 | { | |
376 | return single_open(file, pinconf_groups_show, inode->i_private); | |
377 | } | |
378 | ||
379 | static const struct file_operations pinconf_pins_ops = { | |
380 | .open = pinconf_pins_open, | |
381 | .read = seq_read, | |
382 | .llseek = seq_lseek, | |
383 | .release = single_release, | |
384 | }; | |
385 | ||
386 | static const struct file_operations pinconf_groups_ops = { | |
387 | .open = pinconf_groups_open, | |
388 | .read = seq_read, | |
389 | .llseek = seq_lseek, | |
390 | .release = single_release, | |
391 | }; | |
392 | ||
f07512e6 LM |
393 | #define MAX_NAME_LEN 15 |
394 | ||
395 | struct dbg_cfg { | |
396 | enum pinctrl_map_type map_type; | |
e8c5d759 ME |
397 | char dev_name[MAX_NAME_LEN + 1]; |
398 | char state_name[MAX_NAME_LEN + 1]; | |
399 | char pin_name[MAX_NAME_LEN + 1]; | |
f07512e6 LM |
400 | }; |
401 | ||
402 | /* | |
403 | * Goal is to keep this structure as global in order to simply read the | |
404 | * pinconf-config file after a write to check config is as expected | |
405 | */ | |
406 | static struct dbg_cfg pinconf_dbg_conf; | |
407 | ||
408 | /** | |
409 | * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl | |
410 | * map, of the dev/pin/state that was last written to pinconf-config file. | |
411 | * @s: string filled in with config description | |
412 | * @d: not used | |
413 | */ | |
414 | static int pinconf_dbg_config_print(struct seq_file *s, void *d) | |
415 | { | |
416 | struct pinctrl_maps *maps_node; | |
417 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
418 | const struct pinctrl_map *found = NULL; |
419 | struct pinctrl_dev *pctldev; | |
f07512e6 | 420 | struct dbg_cfg *dbg = &pinconf_dbg_conf; |
d99c8053 | 421 | int i; |
f07512e6 | 422 | |
a386267a | 423 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
424 | |
425 | /* Parse the pinctrl map and look for the elected pin/state */ | |
426 | for_each_maps(maps_node, i, map) { | |
427 | if (map->type != dbg->map_type) | |
428 | continue; | |
429 | if (strcmp(map->dev_name, dbg->dev_name)) | |
430 | continue; | |
431 | if (strcmp(map->name, dbg->state_name)) | |
432 | continue; | |
433 | ||
d99c8053 LM |
434 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { |
435 | /* We found the right pin */ | |
436 | found = map; | |
437 | break; | |
f07512e6 LM |
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 | 451 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
d96310ae JH |
452 | seq_printf(s, "Dev %s has config of %s in state %s:\n", |
453 | dbg->dev_name, dbg->pin_name, dbg->state_name); | |
454 | pinconf_show_config(s, pctldev, found->data.configs.configs, | |
455 | found->data.configs.num_configs); | |
f07512e6 LM |
456 | |
457 | exit: | |
a386267a | 458 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
459 | |
460 | return 0; | |
461 | } | |
462 | ||
463 | /** | |
464 | * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl | |
465 | * map, of a dev/pin/state entry based on user entries to pinconf-config | |
466 | * @user_buf: contains the modification request with expected format: | |
75629981 | 467 | * modify <config> <devicename> <state> <name> <newvalue> |
f07512e6 | 468 | * modify is literal string, alternatives like add/delete not supported yet |
75629981 JH |
469 | * <config> is the configuration to be changed. Supported configs are |
470 | * "config_pin" or "config_group", alternatives like config_mux are not | |
471 | * supported yet. | |
472 | * <devicename> <state> <name> are values that should match the pinctrl-maps | |
3ec440e3 | 473 | * <newvalue> reflects the new config and is driver dependent |
f07512e6 | 474 | */ |
3b59e432 | 475 | static ssize_t pinconf_dbg_config_write(struct file *file, |
f07512e6 LM |
476 | const char __user *user_buf, size_t count, loff_t *ppos) |
477 | { | |
478 | struct pinctrl_maps *maps_node; | |
479 | const struct pinctrl_map *map; | |
8a9dcc3f RKAL |
480 | const struct pinctrl_map *found = NULL; |
481 | struct pinctrl_dev *pctldev; | |
f07512e6 LM |
482 | const struct pinconf_ops *confops = NULL; |
483 | struct dbg_cfg *dbg = &pinconf_dbg_conf; | |
484 | const struct pinctrl_map_configs *configs; | |
e8c5d759 | 485 | char config[MAX_NAME_LEN + 1]; |
f07512e6 LM |
486 | char buf[128]; |
487 | char *b = &buf[0]; | |
488 | int buf_size; | |
489 | char *token; | |
490 | int i; | |
491 | ||
492 | /* Get userspace string and assure termination */ | |
81d36c4f | 493 | buf_size = min(count, sizeof(buf) - 1); |
f07512e6 LM |
494 | if (copy_from_user(buf, user_buf, buf_size)) |
495 | return -EFAULT; | |
496 | buf[buf_size] = 0; | |
497 | ||
498 | /* | |
499 | * need to parse entry and extract parameters: | |
500 | * modify configs_pin devicename state pinname newvalue | |
501 | */ | |
502 | ||
503 | /* Get arg: 'modify' */ | |
504 | token = strsep(&b, " "); | |
505 | if (!token) | |
506 | return -EINVAL; | |
507 | if (strcmp(token, "modify")) | |
508 | return -EINVAL; | |
509 | ||
75629981 JH |
510 | /* |
511 | * Get arg type: "config_pin" and "config_group" | |
512 | * types are supported so far | |
513 | */ | |
f07512e6 LM |
514 | token = strsep(&b, " "); |
515 | if (!token) | |
516 | return -EINVAL; | |
75629981 JH |
517 | if (!strcmp(token, "config_pin")) |
518 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN; | |
519 | else if (!strcmp(token, "config_group")) | |
520 | dbg->map_type = PIN_MAP_TYPE_CONFIGS_GROUP; | |
521 | else | |
f07512e6 | 522 | return -EINVAL; |
f07512e6 LM |
523 | |
524 | /* get arg 'device_name' */ | |
525 | token = strsep(&b, " "); | |
76ce37f0 | 526 | if (!token) |
f07512e6 LM |
527 | return -EINVAL; |
528 | if (strlen(token) >= MAX_NAME_LEN) | |
529 | return -EINVAL; | |
530 | strncpy(dbg->dev_name, token, MAX_NAME_LEN); | |
531 | ||
532 | /* get arg 'state_name' */ | |
533 | token = strsep(&b, " "); | |
76ce37f0 | 534 | if (!token) |
f07512e6 LM |
535 | return -EINVAL; |
536 | if (strlen(token) >= MAX_NAME_LEN) | |
537 | return -EINVAL; | |
538 | strncpy(dbg->state_name, token, MAX_NAME_LEN); | |
539 | ||
540 | /* get arg 'pin_name' */ | |
541 | token = strsep(&b, " "); | |
76ce37f0 | 542 | if (!token) |
f07512e6 LM |
543 | return -EINVAL; |
544 | if (strlen(token) >= MAX_NAME_LEN) | |
545 | return -EINVAL; | |
546 | strncpy(dbg->pin_name, token, MAX_NAME_LEN); | |
547 | ||
548 | /* get new_value of config' */ | |
549 | token = strsep(&b, " "); | |
76ce37f0 | 550 | if (!token) |
f07512e6 LM |
551 | return -EINVAL; |
552 | if (strlen(token) >= MAX_NAME_LEN) | |
553 | return -EINVAL; | |
554 | strncpy(config, token, MAX_NAME_LEN); | |
555 | ||
42fed7ba | 556 | mutex_lock(&pinctrl_maps_mutex); |
f07512e6 LM |
557 | |
558 | /* Parse the pinctrl map and look for the selected dev/state/pin */ | |
559 | for_each_maps(maps_node, i, map) { | |
560 | if (strcmp(map->dev_name, dbg->dev_name)) | |
561 | continue; | |
562 | if (map->type != dbg->map_type) | |
563 | continue; | |
564 | if (strcmp(map->name, dbg->state_name)) | |
565 | continue; | |
566 | ||
567 | /* we found the right pin / state, so overwrite config */ | |
568 | if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) { | |
8a9dcc3f | 569 | found = map; |
f07512e6 LM |
570 | break; |
571 | } | |
572 | } | |
573 | ||
574 | if (!found) { | |
f07512e6 | 575 | count = -EINVAL; |
cb6d315d | 576 | goto exit; |
f07512e6 LM |
577 | } |
578 | ||
8a9dcc3f | 579 | pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name); |
f07512e6 LM |
580 | if (pctldev) |
581 | confops = pctldev->desc->confops; | |
582 | ||
583 | if (confops && confops->pin_config_dbg_parse_modify) { | |
8a9dcc3f | 584 | configs = &found->data.configs; |
f07512e6 LM |
585 | for (i = 0; i < configs->num_configs; i++) { |
586 | confops->pin_config_dbg_parse_modify(pctldev, | |
587 | config, | |
588 | &configs->configs[i]); | |
589 | } | |
590 | } | |
591 | ||
592 | exit: | |
42fed7ba | 593 | mutex_unlock(&pinctrl_maps_mutex); |
f07512e6 LM |
594 | |
595 | return count; | |
596 | } | |
597 | ||
598 | static int pinconf_dbg_config_open(struct inode *inode, struct file *file) | |
599 | { | |
600 | return single_open(file, pinconf_dbg_config_print, inode->i_private); | |
601 | } | |
602 | ||
603 | static const struct file_operations pinconf_dbg_pinconfig_fops = { | |
604 | .open = pinconf_dbg_config_open, | |
605 | .write = pinconf_dbg_config_write, | |
606 | .read = seq_read, | |
607 | .llseek = seq_lseek, | |
608 | .release = single_release, | |
609 | .owner = THIS_MODULE, | |
610 | }; | |
611 | ||
ae6b4d85 LW |
612 | void pinconf_init_device_debugfs(struct dentry *devroot, |
613 | struct pinctrl_dev *pctldev) | |
614 | { | |
615 | debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO, | |
616 | devroot, pctldev, &pinconf_pins_ops); | |
617 | debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO, | |
618 | devroot, pctldev, &pinconf_groups_ops); | |
f07512e6 LM |
619 | debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP), |
620 | devroot, pctldev, &pinconf_dbg_pinconfig_fops); | |
ae6b4d85 LW |
621 | } |
622 | ||
623 | #endif |