blob: 8bfa0643e5dc4e0fb6905ee72c39c5f885a30d62 [file] [log] [blame]
Linus Walleijae6b4d82011-10-19 18:14:33 +02001/*
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>
Laurent Meunierf07512e2013-04-18 10:48:07 +020020#include <linux/uaccess.h>
Linus Walleijae6b4d82011-10-19 18:14:33 +020021#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
Stephen Warren2b694252012-02-19 23:45:46 -070027int pinconf_check_ops(struct pinctrl_dev *pctldev)
28{
29 const struct pinconf_ops *ops = pctldev->desc->confops;
30
Stephen Warren2b694252012-02-19 23:45:46 -070031 /* We have to be able to config the pins in SOME way */
John Crispinad6e1102012-04-26 16:47:11 +020032 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");
Stephen Warren2b694252012-02-19 23:45:46 -070035 return -EINVAL;
John Crispinad6e1102012-04-26 16:47:11 +020036 }
Stephen Warren2b694252012-02-19 23:45:46 -070037 return 0;
38}
39
Stephen Warren1e2082b2012-03-02 13:05:48 -070040int 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
Dong Aishengc95df2d2012-05-14 19:06:36 +080048 if (!map->data.configs.num_configs ||
Stephen Warren1e2082b2012-03-02 13:05:48 -070049 !map->data.configs.configs) {
Dong Aishengc95df2d2012-05-14 19:06:36 +080050 pr_err("failed to register map %s (%d): no configs given\n",
Stephen Warren1e2082b2012-03-02 13:05:48 -070051 map->name, i);
52 return -EINVAL;
53 }
54
55 return 0;
56}
57
Linus Walleij394349f2011-11-24 18:27:15 +010058int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
Linus Walleijae6b4d82011-10-19 18:14:33 +020059 unsigned long *config)
60{
61 const struct pinconf_ops *ops = pctldev->desc->confops;
62
63 if (!ops || !ops->pin_config_get) {
Alexandre Bellonic4206192013-12-09 11:38:29 +010064 dev_dbg(pctldev->dev, "cannot get pin configuration, missing "
Linus Walleijae6b4d82011-10-19 18:14:33 +020065 "pin_config_get() function in driver\n");
Alexandre Bellonic4206192013-12-09 11:38:29 +010066 return -ENOTSUPP;
Linus Walleijae6b4d82011-10-19 18:14:33 +020067 }
68
69 return ops->pin_config_get(pctldev, pin, config);
70}
71
Stephen Warren43699de2011-12-15 16:57:17 -070072int pin_config_group_get(const char *dev_name, const char *pin_group,
Linus Walleijae6b4d82011-10-19 18:14:33 +020073 unsigned long *config)
74{
Stephen Warren43699de2011-12-15 16:57:17 -070075 struct pinctrl_dev *pctldev;
76 const struct pinconf_ops *ops;
Stephen Warren57b676f2012-03-02 13:05:44 -070077 int selector, ret;
78
Linus Walleij9dfac4f2012-02-01 18:02:47 +010079 pctldev = get_pinctrl_dev_from_devname(dev_name);
Stephen Warren57b676f2012-03-02 13:05:44 -070080 if (!pctldev) {
81 ret = -EINVAL;
Patrice Chotard42fed7b2013-04-11 11:01:27 +020082 return ret;
Stephen Warren57b676f2012-03-02 13:05:44 -070083 }
Patrice Chotard42fed7b2013-04-11 11:01:27 +020084
85 mutex_lock(&pctldev->mutex);
86
Stephen Warren43699de2011-12-15 16:57:17 -070087 ops = pctldev->desc->confops;
88
Linus Walleijae6b4d82011-10-19 18:14:33 +020089 if (!ops || !ops->pin_config_group_get) {
Alexandre Bellonic4206192013-12-09 11:38:29 +010090 dev_dbg(pctldev->dev, "cannot get configuration for pin "
Linus Walleijae6b4d82011-10-19 18:14:33 +020091 "group, missing group config get function in "
92 "driver\n");
Alexandre Bellonic4206192013-12-09 11:38:29 +010093 ret = -ENOTSUPP;
Stephen Warren57b676f2012-03-02 13:05:44 -070094 goto unlock;
Linus Walleijae6b4d82011-10-19 18:14:33 +020095 }
96
97 selector = pinctrl_get_group_selector(pctldev, pin_group);
Stephen Warren57b676f2012-03-02 13:05:44 -070098 if (selector < 0) {
99 ret = selector;
100 goto unlock;
101 }
Linus Walleijae6b4d82011-10-19 18:14:33 +0200102
Stephen Warren57b676f2012-03-02 13:05:44 -0700103 ret = ops->pin_config_group_get(pctldev, selector, config);
104
105unlock:
Patrice Chotard42fed7b2013-04-11 11:01:27 +0200106 mutex_unlock(&pctldev->mutex);
Stephen Warren57b676f2012-03-02 13:05:44 -0700107 return ret;
Linus Walleijae6b4d82011-10-19 18:14:33 +0200108}
Linus Walleijae6b4d82011-10-19 18:14:33 +0200109
Stephen Warren1e2082b2012-03-02 13:05:48 -0700110int pinconf_map_to_setting(struct pinctrl_map const *map,
111 struct pinctrl_setting *setting)
112{
113 struct pinctrl_dev *pctldev = setting->pctldev;
Linus Walleij70b36372012-03-12 21:38:29 +0100114 int pin;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700115
116 switch (setting->type) {
117 case PIN_MAP_TYPE_CONFIGS_PIN:
Linus Walleij70b36372012-03-12 21:38:29 +0100118 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;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700126 break;
127 case PIN_MAP_TYPE_CONFIGS_GROUP:
Linus Walleij70b36372012-03-12 21:38:29 +0100128 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;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700136 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
147void pinconf_free_setting(struct pinctrl_setting const *setting)
148{
149}
150
151int 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;
Sherman Yin03b054e2013-08-27 11:32:12 -0700155 int ret;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700156
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 }
Sherman Yin03b054e2013-08-27 11:32:12 -0700168 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;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700177 }
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 }
Sherman Yin03b054e2013-08-27 11:32:12 -0700185 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;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700194 }
195 break;
196 default:
197 return -EINVAL;
198 }
199
200 return 0;
201}
202
Linus Walleijae6b4d82011-10-19 18:14:33 +0200203#ifdef CONFIG_DEBUG_FS
204
Stephen Warren1e2082b2012-03-02 13:05:48 -0700205void pinconf_show_map(struct seq_file *s, struct pinctrl_map const *map)
206{
Stephen Warren6cb41582012-04-13 10:49:06 -0600207 struct pinctrl_dev *pctldev;
208 const struct pinconf_ops *confops;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700209 int i;
210
Stephen Warren6cb41582012-04-13 10:49:06 -0600211 pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name);
212 if (pctldev)
213 confops = pctldev->desc->confops;
214 else
215 confops = NULL;
216
Stephen Warren1e2082b2012-03-02 13:05:48 -0700217 switch (map->type) {
218 case PIN_MAP_TYPE_CONFIGS_PIN:
219 seq_printf(s, "pin ");
220 break;
221 case PIN_MAP_TYPE_CONFIGS_GROUP:
222 seq_printf(s, "group ");
223 break;
224 default:
225 break;
226 }
227
228 seq_printf(s, "%s\n", map->data.configs.group_or_pin);
229
Stephen Warren6cb41582012-04-13 10:49:06 -0600230 for (i = 0; i < map->data.configs.num_configs; i++) {
231 seq_printf(s, "config ");
232 if (confops && confops->pin_config_config_dbg_show)
233 confops->pin_config_config_dbg_show(pctldev, s,
234 map->data.configs.configs[i]);
235 else
236 seq_printf(s, "%08lx", map->data.configs.configs[i]);
237 seq_printf(s, "\n");
238 }
Stephen Warren1e2082b2012-03-02 13:05:48 -0700239}
240
241void pinconf_show_setting(struct seq_file *s,
242 struct pinctrl_setting const *setting)
243{
244 struct pinctrl_dev *pctldev = setting->pctldev;
245 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
Stephen Warren6cb41582012-04-13 10:49:06 -0600246 const struct pinconf_ops *confops = pctldev->desc->confops;
Stephen Warren1e2082b2012-03-02 13:05:48 -0700247 struct pin_desc *desc;
248 int i;
249
250 switch (setting->type) {
251 case PIN_MAP_TYPE_CONFIGS_PIN:
252 desc = pin_desc_get(setting->pctldev,
253 setting->data.configs.group_or_pin);
254 seq_printf(s, "pin %s (%d)",
255 desc->name ? desc->name : "unnamed",
256 setting->data.configs.group_or_pin);
257 break;
258 case PIN_MAP_TYPE_CONFIGS_GROUP:
259 seq_printf(s, "group %s (%d)",
260 pctlops->get_group_name(pctldev,
261 setting->data.configs.group_or_pin),
262 setting->data.configs.group_or_pin);
263 break;
264 default:
265 break;
266 }
267
268 /*
269 * FIXME: We should really get the pin controler to dump the config
270 * values, so they can be decoded to something meaningful.
271 */
Stephen Warren6cb41582012-04-13 10:49:06 -0600272 for (i = 0; i < setting->data.configs.num_configs; i++) {
273 seq_printf(s, " ");
274 if (confops && confops->pin_config_config_dbg_show)
275 confops->pin_config_config_dbg_show(pctldev, s,
276 setting->data.configs.configs[i]);
277 else
278 seq_printf(s, "%08lx",
279 setting->data.configs.configs[i]);
280 }
Stephen Warren1e2082b2012-03-02 13:05:48 -0700281
282 seq_printf(s, "\n");
283}
284
Linus Walleijae6b4d82011-10-19 18:14:33 +0200285static void pinconf_dump_pin(struct pinctrl_dev *pctldev,
286 struct seq_file *s, int pin)
287{
288 const struct pinconf_ops *ops = pctldev->desc->confops;
289
Linus Walleij394349f2011-11-24 18:27:15 +0100290 /* no-op when not using generic pin config */
291 pinconf_generic_dump_pin(pctldev, s, pin);
Linus Walleijae6b4d82011-10-19 18:14:33 +0200292 if (ops && ops->pin_config_dbg_show)
293 ops->pin_config_dbg_show(pctldev, s, pin);
294}
295
296static int pinconf_pins_show(struct seq_file *s, void *what)
297{
298 struct pinctrl_dev *pctldev = s->private;
Chanho Park706e8522012-01-03 16:47:50 +0900299 unsigned i, pin;
Linus Walleijae6b4d82011-10-19 18:14:33 +0200300
301 seq_puts(s, "Pin config settings per pin\n");
Dong Aisheng2aeefe02012-04-16 22:07:24 +0800302 seq_puts(s, "Format: pin (name): configs\n");
Linus Walleijae6b4d82011-10-19 18:14:33 +0200303
Patrice Chotard42fed7b2013-04-11 11:01:27 +0200304 mutex_lock(&pctldev->mutex);
Stephen Warren57b676f2012-03-02 13:05:44 -0700305
Chanho Park706e8522012-01-03 16:47:50 +0900306 /* The pin number can be retrived from the pin controller descriptor */
Stephen Warren546edd82012-01-06 13:38:31 -0700307 for (i = 0; i < pctldev->desc->npins; i++) {
Linus Walleijae6b4d82011-10-19 18:14:33 +0200308 struct pin_desc *desc;
309
Chanho Park706e8522012-01-03 16:47:50 +0900310 pin = pctldev->desc->pins[i].number;
Linus Walleijae6b4d82011-10-19 18:14:33 +0200311 desc = pin_desc_get(pctldev, pin);
Chanho Park706e8522012-01-03 16:47:50 +0900312 /* Skip if we cannot search the pin */
Linus Walleijae6b4d82011-10-19 18:14:33 +0200313 if (desc == NULL)
314 continue;
315
316 seq_printf(s, "pin %d (%s):", pin,
317 desc->name ? desc->name : "unnamed");
318
319 pinconf_dump_pin(pctldev, s, pin);
320
321 seq_printf(s, "\n");
322 }
323
Patrice Chotard42fed7b2013-04-11 11:01:27 +0200324 mutex_unlock(&pctldev->mutex);
Stephen Warren57b676f2012-03-02 13:05:44 -0700325
Linus Walleijae6b4d82011-10-19 18:14:33 +0200326 return 0;
327}
328
329static void pinconf_dump_group(struct pinctrl_dev *pctldev,
330 struct seq_file *s, unsigned selector,
331 const char *gname)
332{
333 const struct pinconf_ops *ops = pctldev->desc->confops;
334
Linus Walleij394349f2011-11-24 18:27:15 +0100335 /* no-op when not using generic pin config */
336 pinconf_generic_dump_group(pctldev, s, gname);
Linus Walleijae6b4d82011-10-19 18:14:33 +0200337 if (ops && ops->pin_config_group_dbg_show)
338 ops->pin_config_group_dbg_show(pctldev, s, selector);
339}
340
341static int pinconf_groups_show(struct seq_file *s, void *what)
342{
343 struct pinctrl_dev *pctldev = s->private;
344 const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;
Viresh Kumard1e90e92012-03-30 11:25:40 +0530345 unsigned ngroups = pctlops->get_groups_count(pctldev);
Linus Walleijae6b4d82011-10-19 18:14:33 +0200346 unsigned selector = 0;
347
Linus Walleijae6b4d82011-10-19 18:14:33 +0200348 seq_puts(s, "Pin config settings per pin group\n");
Dong Aisheng2aeefe02012-04-16 22:07:24 +0800349 seq_puts(s, "Format: group (name): configs\n");
Linus Walleijae6b4d82011-10-19 18:14:33 +0200350
Viresh Kumard1e90e92012-03-30 11:25:40 +0530351 while (selector < ngroups) {
Linus Walleijae6b4d82011-10-19 18:14:33 +0200352 const char *gname = pctlops->get_group_name(pctldev, selector);
353
354 seq_printf(s, "%u (%s):", selector, gname);
355 pinconf_dump_group(pctldev, s, selector, gname);
Stephen Warrenf7b90062012-02-19 23:45:58 -0700356 seq_printf(s, "\n");
357
Linus Walleijae6b4d82011-10-19 18:14:33 +0200358 selector++;
359 }
360
Linus Walleijae6b4d82011-10-19 18:14:33 +0200361 return 0;
362}
363
364static int pinconf_pins_open(struct inode *inode, struct file *file)
365{
366 return single_open(file, pinconf_pins_show, inode->i_private);
367}
368
369static int pinconf_groups_open(struct inode *inode, struct file *file)
370{
371 return single_open(file, pinconf_groups_show, inode->i_private);
372}
373
374static const struct file_operations pinconf_pins_ops = {
375 .open = pinconf_pins_open,
376 .read = seq_read,
377 .llseek = seq_lseek,
378 .release = single_release,
379};
380
381static const struct file_operations pinconf_groups_ops = {
382 .open = pinconf_groups_open,
383 .read = seq_read,
384 .llseek = seq_lseek,
385 .release = single_release,
386};
387
Laurent Meunierf07512e2013-04-18 10:48:07 +0200388#define MAX_NAME_LEN 15
389
390struct dbg_cfg {
391 enum pinctrl_map_type map_type;
392 char dev_name[MAX_NAME_LEN+1];
393 char state_name[MAX_NAME_LEN+1];
394 char pin_name[MAX_NAME_LEN+1];
395};
396
397/*
398 * Goal is to keep this structure as global in order to simply read the
399 * pinconf-config file after a write to check config is as expected
400 */
401static struct dbg_cfg pinconf_dbg_conf;
402
403/**
404 * pinconf_dbg_config_print() - display the pinctrl config from the pinctrl
405 * map, of the dev/pin/state that was last written to pinconf-config file.
406 * @s: string filled in with config description
407 * @d: not used
408 */
409static int pinconf_dbg_config_print(struct seq_file *s, void *d)
410{
411 struct pinctrl_maps *maps_node;
412 const struct pinctrl_map *map;
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100413 const struct pinctrl_map *found = NULL;
414 struct pinctrl_dev *pctldev;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200415 const struct pinconf_ops *confops = NULL;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200416 struct dbg_cfg *dbg = &pinconf_dbg_conf;
417 int i, j;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200418 unsigned long config;
419
Linus Walleija3862672013-05-27 15:53:32 +0200420 mutex_lock(&pinctrl_maps_mutex);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200421
422 /* Parse the pinctrl map and look for the elected pin/state */
423 for_each_maps(maps_node, i, map) {
424 if (map->type != dbg->map_type)
425 continue;
426 if (strcmp(map->dev_name, dbg->dev_name))
427 continue;
428 if (strcmp(map->name, dbg->state_name))
429 continue;
430
431 for (j = 0; j < map->data.configs.num_configs; j++) {
432 if (!strcmp(map->data.configs.group_or_pin,
433 dbg->pin_name)) {
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100434 /* We found the right pin / state */
435 found = map;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200436 break;
437 }
438 }
439 }
440
441 if (!found) {
442 seq_printf(s, "No config found for dev/state/pin, expected:\n");
443 seq_printf(s, "Searched dev:%s\n", dbg->dev_name);
444 seq_printf(s, "Searched state:%s\n", dbg->state_name);
445 seq_printf(s, "Searched pin:%s\n", dbg->pin_name);
446 seq_printf(s, "Use: modify config_pin <devname> "\
447 "<state> <pinname> <value>\n");
448 goto exit;
449 }
450
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100451 pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name);
452 config = *found->data.configs.configs;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200453 seq_printf(s, "Dev %s has config of %s in state %s: 0x%08lX\n",
454 dbg->dev_name, dbg->pin_name,
455 dbg->state_name, config);
456
457 if (pctldev)
458 confops = pctldev->desc->confops;
459
460 if (confops && confops->pin_config_config_dbg_show)
461 confops->pin_config_config_dbg_show(pctldev, s, config);
462
463exit:
Linus Walleija3862672013-05-27 15:53:32 +0200464 mutex_unlock(&pinctrl_maps_mutex);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200465
466 return 0;
467}
468
469/**
470 * pinconf_dbg_config_write() - modify the pinctrl config in the pinctrl
471 * map, of a dev/pin/state entry based on user entries to pinconf-config
472 * @user_buf: contains the modification request with expected format:
473 * modify config_pin <devicename> <state> <pinname> <newvalue>
474 * modify is literal string, alternatives like add/delete not supported yet
475 * config_pin is literal, alternatives like config_mux not supported yet
476 * <devicename> <state> <pinname> are values that should match the pinctrl-maps
477 * <newvalue> reflects the new config and is driver dependant
478 */
Vincent Stehlé3b59e432013-09-16 22:50:32 +0200479static ssize_t pinconf_dbg_config_write(struct file *file,
Laurent Meunierf07512e2013-04-18 10:48:07 +0200480 const char __user *user_buf, size_t count, loff_t *ppos)
481{
482 struct pinctrl_maps *maps_node;
483 const struct pinctrl_map *map;
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100484 const struct pinctrl_map *found = NULL;
485 struct pinctrl_dev *pctldev;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200486 const struct pinconf_ops *confops = NULL;
487 struct dbg_cfg *dbg = &pinconf_dbg_conf;
488 const struct pinctrl_map_configs *configs;
489 char config[MAX_NAME_LEN+1];
Laurent Meunierf07512e2013-04-18 10:48:07 +0200490 char buf[128];
491 char *b = &buf[0];
492 int buf_size;
493 char *token;
494 int i;
495
496 /* Get userspace string and assure termination */
Dan Carpenter81d36c42013-09-17 13:47:54 +0300497 buf_size = min(count, sizeof(buf) - 1);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200498 if (copy_from_user(buf, user_buf, buf_size))
499 return -EFAULT;
500 buf[buf_size] = 0;
501
502 /*
503 * need to parse entry and extract parameters:
504 * modify configs_pin devicename state pinname newvalue
505 */
506
507 /* Get arg: 'modify' */
508 token = strsep(&b, " ");
509 if (!token)
510 return -EINVAL;
511 if (strcmp(token, "modify"))
512 return -EINVAL;
513
514 /* Get arg type: "config_pin" type supported so far */
515 token = strsep(&b, " ");
516 if (!token)
517 return -EINVAL;
518 if (strcmp(token, "config_pin"))
519 return -EINVAL;
520 dbg->map_type = PIN_MAP_TYPE_CONFIGS_PIN;
521
522 /* get arg 'device_name' */
523 token = strsep(&b, " ");
524 if (token == NULL)
525 return -EINVAL;
526 if (strlen(token) >= MAX_NAME_LEN)
527 return -EINVAL;
528 strncpy(dbg->dev_name, token, MAX_NAME_LEN);
529
530 /* get arg 'state_name' */
531 token = strsep(&b, " ");
532 if (token == NULL)
533 return -EINVAL;
534 if (strlen(token) >= MAX_NAME_LEN)
535 return -EINVAL;
536 strncpy(dbg->state_name, token, MAX_NAME_LEN);
537
538 /* get arg 'pin_name' */
539 token = strsep(&b, " ");
540 if (token == NULL)
541 return -EINVAL;
542 if (strlen(token) >= MAX_NAME_LEN)
543 return -EINVAL;
544 strncpy(dbg->pin_name, token, MAX_NAME_LEN);
545
546 /* get new_value of config' */
547 token = strsep(&b, " ");
548 if (token == NULL)
549 return -EINVAL;
550 if (strlen(token) >= MAX_NAME_LEN)
551 return -EINVAL;
552 strncpy(config, token, MAX_NAME_LEN);
553
Patrice Chotard42fed7b2013-04-11 11:01:27 +0200554 mutex_lock(&pinctrl_maps_mutex);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200555
556 /* Parse the pinctrl map and look for the selected dev/state/pin */
557 for_each_maps(maps_node, i, map) {
558 if (strcmp(map->dev_name, dbg->dev_name))
559 continue;
560 if (map->type != dbg->map_type)
561 continue;
562 if (strcmp(map->name, dbg->state_name))
563 continue;
564
565 /* we found the right pin / state, so overwrite config */
566 if (!strcmp(map->data.configs.group_or_pin, dbg->pin_name)) {
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100567 found = map;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200568 break;
569 }
570 }
571
572 if (!found) {
Laurent Meunierf07512e2013-04-18 10:48:07 +0200573 count = -EINVAL;
Laurent Meuniercb6d3152013-04-24 13:05:50 +0200574 goto exit;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200575 }
576
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100577 pctldev = get_pinctrl_dev_from_devname(found->ctrl_dev_name);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200578 if (pctldev)
579 confops = pctldev->desc->confops;
580
581 if (confops && confops->pin_config_dbg_parse_modify) {
Russell King - ARM Linux8a9dcc32013-07-28 13:13:00 +0100582 configs = &found->data.configs;
Laurent Meunierf07512e2013-04-18 10:48:07 +0200583 for (i = 0; i < configs->num_configs; i++) {
584 confops->pin_config_dbg_parse_modify(pctldev,
585 config,
586 &configs->configs[i]);
587 }
588 }
589
590exit:
Patrice Chotard42fed7b2013-04-11 11:01:27 +0200591 mutex_unlock(&pinctrl_maps_mutex);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200592
593 return count;
594}
595
596static int pinconf_dbg_config_open(struct inode *inode, struct file *file)
597{
598 return single_open(file, pinconf_dbg_config_print, inode->i_private);
599}
600
601static const struct file_operations pinconf_dbg_pinconfig_fops = {
602 .open = pinconf_dbg_config_open,
603 .write = pinconf_dbg_config_write,
604 .read = seq_read,
605 .llseek = seq_lseek,
606 .release = single_release,
607 .owner = THIS_MODULE,
608};
609
Linus Walleijae6b4d82011-10-19 18:14:33 +0200610void pinconf_init_device_debugfs(struct dentry *devroot,
611 struct pinctrl_dev *pctldev)
612{
613 debugfs_create_file("pinconf-pins", S_IFREG | S_IRUGO,
614 devroot, pctldev, &pinconf_pins_ops);
615 debugfs_create_file("pinconf-groups", S_IFREG | S_IRUGO,
616 devroot, pctldev, &pinconf_groups_ops);
Laurent Meunierf07512e2013-04-18 10:48:07 +0200617 debugfs_create_file("pinconf-config", (S_IRUGO | S_IWUSR | S_IWGRP),
618 devroot, pctldev, &pinconf_dbg_pinconfig_fops);
Linus Walleijae6b4d82011-10-19 18:14:33 +0200619}
620
621#endif