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1 | /* | |
2 | * Core driver for the imx pin controller | |
3 | * | |
4 | * Copyright (C) 2012 Freescale Semiconductor, Inc. | |
5 | * Copyright (C) 2012 Linaro Ltd. | |
6 | * | |
7 | * Author: Dong Aisheng <dong.aisheng@linaro.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | */ | |
14 | ||
15 | #include <linux/err.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_device.h> | |
21 | #include <linux/pinctrl/machine.h> | |
22 | #include <linux/pinctrl/pinconf.h> | |
23 | #include <linux/pinctrl/pinctrl.h> | |
24 | #include <linux/pinctrl/pinmux.h> | |
25 | #include <linux/slab.h> | |
26 | ||
27 | #include "core.h" | |
28 | #include "pinctrl-imx.h" | |
29 | ||
30 | #define IMX_PMX_DUMP(info, p, m, c, n) \ | |
31 | { \ | |
32 | int i, j; \ | |
33 | printk(KERN_DEBUG "Format: Pin Mux Config\n"); \ | |
34 | for (i = 0; i < n; i++) { \ | |
35 | j = p[i]; \ | |
36 | printk(KERN_DEBUG "%s %d 0x%lx\n", \ | |
37 | info->pins[j].name, \ | |
38 | m[i], c[i]); \ | |
39 | } \ | |
40 | } | |
41 | ||
42 | /* The bits in CONFIG cell defined in binding doc*/ | |
43 | #define IMX_NO_PAD_CTL 0x80000000 /* no pin config need */ | |
44 | #define IMX_PAD_SION 0x40000000 /* set SION */ | |
45 | ||
46 | /** | |
47 | * @dev: a pointer back to containing device | |
48 | * @base: the offset to the controller in virtual memory | |
49 | */ | |
50 | struct imx_pinctrl { | |
51 | struct device *dev; | |
52 | struct pinctrl_dev *pctl; | |
53 | void __iomem *base; | |
54 | const struct imx_pinctrl_soc_info *info; | |
55 | }; | |
56 | ||
57 | static const struct imx_pin_reg *imx_find_pin_reg( | |
58 | const struct imx_pinctrl_soc_info *info, | |
59 | unsigned pin, bool is_mux, unsigned mux) | |
60 | { | |
61 | const struct imx_pin_reg *pin_reg = NULL; | |
62 | int i; | |
63 | ||
64 | for (i = 0; i < info->npin_regs; i++) { | |
65 | pin_reg = &info->pin_regs[i]; | |
66 | if (pin_reg->pid != pin) | |
67 | continue; | |
68 | if (!is_mux) | |
69 | break; | |
70 | else if (pin_reg->mux_mode == (mux & IMX_MUX_MASK)) | |
71 | break; | |
72 | } | |
73 | ||
74 | if (!pin_reg) { | |
75 | dev_err(info->dev, "Pin(%s): unable to find pin reg map\n", | |
76 | info->pins[pin].name); | |
77 | return NULL; | |
78 | } | |
79 | ||
80 | return pin_reg; | |
81 | } | |
82 | ||
83 | static const inline struct imx_pin_group *imx_pinctrl_find_group_by_name( | |
84 | const struct imx_pinctrl_soc_info *info, | |
85 | const char *name) | |
86 | { | |
87 | const struct imx_pin_group *grp = NULL; | |
88 | int i; | |
89 | ||
90 | for (i = 0; i < info->ngroups; i++) { | |
91 | if (!strcmp(info->groups[i].name, name)) { | |
92 | grp = &info->groups[i]; | |
93 | break; | |
94 | } | |
95 | } | |
96 | ||
97 | return grp; | |
98 | } | |
99 | ||
100 | static int imx_get_groups_count(struct pinctrl_dev *pctldev) | |
101 | { | |
102 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
103 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
104 | ||
105 | return info->ngroups; | |
106 | } | |
107 | ||
108 | static const char *imx_get_group_name(struct pinctrl_dev *pctldev, | |
109 | unsigned selector) | |
110 | { | |
111 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
112 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
113 | ||
114 | return info->groups[selector].name; | |
115 | } | |
116 | ||
117 | static int imx_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, | |
118 | const unsigned **pins, | |
119 | unsigned *npins) | |
120 | { | |
121 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
122 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
123 | ||
124 | if (selector >= info->ngroups) | |
125 | return -EINVAL; | |
126 | ||
127 | *pins = info->groups[selector].pins; | |
128 | *npins = info->groups[selector].npins; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static void imx_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, | |
134 | unsigned offset) | |
135 | { | |
136 | seq_printf(s, "%s", dev_name(pctldev->dev)); | |
137 | } | |
138 | ||
139 | static int imx_dt_node_to_map(struct pinctrl_dev *pctldev, | |
140 | struct device_node *np, | |
141 | struct pinctrl_map **map, unsigned *num_maps) | |
142 | { | |
143 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
144 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
145 | const struct imx_pin_group *grp; | |
146 | struct pinctrl_map *new_map; | |
147 | struct device_node *parent; | |
148 | int map_num = 1; | |
149 | int i; | |
150 | ||
151 | /* | |
152 | * first find the group of this node and check if we need create | |
153 | * config maps for pins | |
154 | */ | |
155 | grp = imx_pinctrl_find_group_by_name(info, np->name); | |
156 | if (!grp) { | |
157 | dev_err(info->dev, "unable to find group for node %s\n", | |
158 | np->name); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | for (i = 0; i < grp->npins; i++) { | |
163 | if (!(grp->configs[i] & IMX_NO_PAD_CTL)) | |
164 | map_num++; | |
165 | } | |
166 | ||
167 | new_map = kmalloc(sizeof(struct pinctrl_map) * map_num, GFP_KERNEL); | |
168 | if (!new_map) | |
169 | return -ENOMEM; | |
170 | ||
171 | *map = new_map; | |
172 | *num_maps = map_num; | |
173 | ||
174 | /* create mux map */ | |
175 | parent = of_get_parent(np); | |
176 | if (!parent) { | |
177 | kfree(new_map); | |
178 | return -EINVAL; | |
179 | } | |
180 | new_map[0].type = PIN_MAP_TYPE_MUX_GROUP; | |
181 | new_map[0].data.mux.function = parent->name; | |
182 | new_map[0].data.mux.group = np->name; | |
183 | of_node_put(parent); | |
184 | ||
185 | /* create config map */ | |
186 | new_map++; | |
187 | for (i = 0; i < grp->npins; i++) { | |
188 | if (!(grp->configs[i] & IMX_NO_PAD_CTL)) { | |
189 | new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN; | |
190 | new_map[i].data.configs.group_or_pin = | |
191 | pin_get_name(pctldev, grp->pins[i]); | |
192 | new_map[i].data.configs.configs = &grp->configs[i]; | |
193 | new_map[i].data.configs.num_configs = 1; | |
194 | } | |
195 | } | |
196 | ||
197 | dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n", | |
198 | (*map)->data.mux.function, (*map)->data.mux.group, map_num); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static void imx_dt_free_map(struct pinctrl_dev *pctldev, | |
204 | struct pinctrl_map *map, unsigned num_maps) | |
205 | { | |
206 | kfree(map); | |
207 | } | |
208 | ||
209 | static struct pinctrl_ops imx_pctrl_ops = { | |
210 | .get_groups_count = imx_get_groups_count, | |
211 | .get_group_name = imx_get_group_name, | |
212 | .get_group_pins = imx_get_group_pins, | |
213 | .pin_dbg_show = imx_pin_dbg_show, | |
214 | .dt_node_to_map = imx_dt_node_to_map, | |
215 | .dt_free_map = imx_dt_free_map, | |
216 | ||
217 | }; | |
218 | ||
219 | static int imx_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector, | |
220 | unsigned group) | |
221 | { | |
222 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
223 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
224 | const struct imx_pin_reg *pin_reg; | |
225 | const unsigned *pins, *mux; | |
226 | unsigned int npins, pin_id; | |
227 | int i; | |
228 | ||
229 | /* | |
230 | * Configure the mux mode for each pin in the group for a specific | |
231 | * function. | |
232 | */ | |
233 | pins = info->groups[group].pins; | |
234 | npins = info->groups[group].npins; | |
235 | mux = info->groups[group].mux_mode; | |
236 | ||
237 | WARN_ON(!pins || !npins || !mux); | |
238 | ||
239 | dev_dbg(ipctl->dev, "enable function %s group %s\n", | |
240 | info->functions[selector].name, info->groups[group].name); | |
241 | ||
242 | for (i = 0; i < npins; i++) { | |
243 | pin_id = pins[i]; | |
244 | ||
245 | pin_reg = imx_find_pin_reg(info, pin_id, 1, mux[i]); | |
246 | if (!pin_reg) | |
247 | return -EINVAL; | |
248 | ||
249 | if (!pin_reg->mux_reg) { | |
250 | dev_err(ipctl->dev, "Pin(%s) does not support mux function\n", | |
251 | info->pins[pin_id].name); | |
252 | return -EINVAL; | |
253 | } | |
254 | ||
255 | writel(mux[i], ipctl->base + pin_reg->mux_reg); | |
256 | dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%x\n", | |
257 | pin_reg->mux_reg, mux[i]); | |
258 | ||
259 | /* some pins also need select input setting, set it if found */ | |
260 | if (pin_reg->input_reg) { | |
261 | writel(pin_reg->input_val, ipctl->base + pin_reg->input_reg); | |
262 | dev_dbg(ipctl->dev, | |
263 | "==>select_input: offset 0x%x val 0x%x\n", | |
264 | pin_reg->input_reg, pin_reg->input_val); | |
265 | } | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | static int imx_pmx_get_funcs_count(struct pinctrl_dev *pctldev) | |
272 | { | |
273 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
274 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
275 | ||
276 | return info->nfunctions; | |
277 | } | |
278 | ||
279 | static const char *imx_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
280 | unsigned selector) | |
281 | { | |
282 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
283 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
284 | ||
285 | return info->functions[selector].name; | |
286 | } | |
287 | ||
288 | static int imx_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector, | |
289 | const char * const **groups, | |
290 | unsigned * const num_groups) | |
291 | { | |
292 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
293 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
294 | ||
295 | *groups = info->functions[selector].groups; | |
296 | *num_groups = info->functions[selector].num_groups; | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | static struct pinmux_ops imx_pmx_ops = { | |
302 | .get_functions_count = imx_pmx_get_funcs_count, | |
303 | .get_function_name = imx_pmx_get_func_name, | |
304 | .get_function_groups = imx_pmx_get_groups, | |
305 | .enable = imx_pmx_enable, | |
306 | }; | |
307 | ||
308 | static int imx_pinconf_get(struct pinctrl_dev *pctldev, | |
309 | unsigned pin_id, unsigned long *config) | |
310 | { | |
311 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
312 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
313 | const struct imx_pin_reg *pin_reg; | |
314 | ||
315 | pin_reg = imx_find_pin_reg(info, pin_id, 0, 0); | |
316 | if (!pin_reg) | |
317 | return -EINVAL; | |
318 | ||
319 | if (!pin_reg->conf_reg) { | |
320 | dev_err(info->dev, "Pin(%s) does not support config function\n", | |
321 | info->pins[pin_id].name); | |
322 | return -EINVAL; | |
323 | } | |
324 | ||
325 | *config = readl(ipctl->base + pin_reg->conf_reg); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | static int imx_pinconf_set(struct pinctrl_dev *pctldev, | |
331 | unsigned pin_id, unsigned long config) | |
332 | { | |
333 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
334 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
335 | const struct imx_pin_reg *pin_reg; | |
336 | ||
337 | pin_reg = imx_find_pin_reg(info, pin_id, 0, 0); | |
338 | if (!pin_reg) | |
339 | return -EINVAL; | |
340 | ||
341 | if (!pin_reg->conf_reg) { | |
342 | dev_err(info->dev, "Pin(%s) does not support config function\n", | |
343 | info->pins[pin_id].name); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | dev_dbg(ipctl->dev, "pinconf set pin %s\n", | |
348 | info->pins[pin_id].name); | |
349 | ||
350 | writel(config, ipctl->base + pin_reg->conf_reg); | |
351 | dev_dbg(ipctl->dev, "write: offset 0x%x val 0x%lx\n", | |
352 | pin_reg->conf_reg, config); | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static void imx_pinconf_dbg_show(struct pinctrl_dev *pctldev, | |
358 | struct seq_file *s, unsigned pin_id) | |
359 | { | |
360 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
361 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
362 | const struct imx_pin_reg *pin_reg; | |
363 | unsigned long config; | |
364 | ||
365 | pin_reg = imx_find_pin_reg(info, pin_id, 0, 0); | |
366 | if (!pin_reg || !pin_reg->conf_reg) { | |
367 | seq_printf(s, "N/A"); | |
368 | return; | |
369 | } | |
370 | ||
371 | config = readl(ipctl->base + pin_reg->conf_reg); | |
372 | seq_printf(s, "0x%lx", config); | |
373 | } | |
374 | ||
375 | static void imx_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, | |
376 | struct seq_file *s, unsigned group) | |
377 | { | |
378 | struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev); | |
379 | const struct imx_pinctrl_soc_info *info = ipctl->info; | |
380 | struct imx_pin_group *grp; | |
381 | unsigned long config; | |
382 | const char *name; | |
383 | int i, ret; | |
384 | ||
385 | if (group > info->ngroups) | |
386 | return; | |
387 | ||
388 | seq_printf(s, "\n"); | |
389 | grp = &info->groups[group]; | |
390 | for (i = 0; i < grp->npins; i++) { | |
391 | name = pin_get_name(pctldev, grp->pins[i]); | |
392 | ret = imx_pinconf_get(pctldev, grp->pins[i], &config); | |
393 | if (ret) | |
394 | return; | |
395 | seq_printf(s, "%s: 0x%lx", name, config); | |
396 | } | |
397 | } | |
398 | ||
399 | struct pinconf_ops imx_pinconf_ops = { | |
400 | .pin_config_get = imx_pinconf_get, | |
401 | .pin_config_set = imx_pinconf_set, | |
402 | .pin_config_dbg_show = imx_pinconf_dbg_show, | |
403 | .pin_config_group_dbg_show = imx_pinconf_group_dbg_show, | |
404 | }; | |
405 | ||
406 | static struct pinctrl_desc imx_pinctrl_desc = { | |
407 | .pctlops = &imx_pctrl_ops, | |
408 | .pmxops = &imx_pmx_ops, | |
409 | .confops = &imx_pinconf_ops, | |
410 | .owner = THIS_MODULE, | |
411 | }; | |
412 | ||
413 | /* decode pin id and mux from pin function id got from device tree*/ | |
414 | static int imx_pinctrl_get_pin_id_and_mux(const struct imx_pinctrl_soc_info *info, | |
415 | unsigned int pin_func_id, unsigned int *pin_id, | |
416 | unsigned int *mux) | |
417 | { | |
418 | if (pin_func_id > info->npin_regs) | |
419 | return -EINVAL; | |
420 | ||
421 | *pin_id = info->pin_regs[pin_func_id].pid; | |
422 | *mux = info->pin_regs[pin_func_id].mux_mode; | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | static int __devinit imx_pinctrl_parse_groups(struct device_node *np, | |
428 | struct imx_pin_group *grp, | |
429 | struct imx_pinctrl_soc_info *info, | |
430 | u32 index) | |
431 | { | |
432 | unsigned int pin_func_id; | |
433 | int ret, size; | |
434 | const const __be32 *list; | |
435 | int i, j; | |
436 | u32 config; | |
437 | ||
438 | dev_dbg(info->dev, "group(%d): %s\n", index, np->name); | |
439 | ||
440 | /* Initialise group */ | |
441 | grp->name = np->name; | |
442 | ||
443 | /* | |
444 | * the binding format is fsl,pins = <PIN_FUNC_ID CONFIG ...>, | |
445 | * do sanity check and calculate pins number | |
446 | */ | |
447 | list = of_get_property(np, "fsl,pins", &size); | |
448 | /* we do not check return since it's safe node passed down */ | |
449 | size /= sizeof(*list); | |
450 | if (!size || size % 2) { | |
451 | dev_err(info->dev, "wrong pins number or pins and configs should be pairs\n"); | |
452 | return -EINVAL; | |
453 | } | |
454 | ||
455 | grp->npins = size / 2; | |
456 | grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int), | |
457 | GFP_KERNEL); | |
458 | grp->mux_mode = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int), | |
459 | GFP_KERNEL); | |
460 | grp->configs = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned long), | |
461 | GFP_KERNEL); | |
462 | for (i = 0, j = 0; i < size; i += 2, j++) { | |
463 | pin_func_id = be32_to_cpu(*list++); | |
464 | ret = imx_pinctrl_get_pin_id_and_mux(info, pin_func_id, | |
465 | &grp->pins[j], &grp->mux_mode[j]); | |
466 | if (ret) { | |
467 | dev_err(info->dev, "get invalid pin function id\n"); | |
468 | return -EINVAL; | |
469 | } | |
470 | /* SION bit is in mux register */ | |
471 | config = be32_to_cpu(*list++); | |
472 | if (config & IMX_PAD_SION) | |
473 | grp->mux_mode[j] |= IOMUXC_CONFIG_SION; | |
474 | grp->configs[j] = config & ~IMX_PAD_SION; | |
475 | } | |
476 | ||
477 | IMX_PMX_DUMP(info, grp->pins, grp->mux_mode, grp->configs, grp->npins); | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | static int __devinit imx_pinctrl_parse_functions(struct device_node *np, | |
483 | struct imx_pinctrl_soc_info *info, u32 index) | |
484 | { | |
485 | struct device_node *child; | |
486 | struct imx_pmx_func *func; | |
487 | struct imx_pin_group *grp; | |
488 | int ret; | |
489 | static u32 grp_index; | |
490 | u32 i = 0; | |
491 | ||
492 | dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name); | |
493 | ||
494 | func = &info->functions[index]; | |
495 | ||
496 | /* Initialise function */ | |
497 | func->name = np->name; | |
498 | func->num_groups = of_get_child_count(np); | |
499 | if (func->num_groups <= 0) { | |
500 | dev_err(info->dev, "no groups defined\n"); | |
501 | return -EINVAL; | |
502 | } | |
503 | func->groups = devm_kzalloc(info->dev, | |
504 | func->num_groups * sizeof(char *), GFP_KERNEL); | |
505 | ||
506 | for_each_child_of_node(np, child) { | |
507 | func->groups[i] = child->name; | |
508 | grp = &info->groups[grp_index++]; | |
509 | ret = imx_pinctrl_parse_groups(child, grp, info, i++); | |
510 | if (ret) | |
511 | return ret; | |
512 | } | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static int __devinit imx_pinctrl_probe_dt(struct platform_device *pdev, | |
518 | struct imx_pinctrl_soc_info *info) | |
519 | { | |
520 | struct device_node *np = pdev->dev.of_node; | |
521 | struct device_node *child; | |
522 | int ret; | |
523 | u32 nfuncs = 0; | |
524 | u32 i = 0; | |
525 | ||
526 | if (!np) | |
527 | return -ENODEV; | |
528 | ||
529 | nfuncs = of_get_child_count(np); | |
530 | if (nfuncs <= 0) { | |
531 | dev_err(&pdev->dev, "no functions defined\n"); | |
532 | return -EINVAL; | |
533 | } | |
534 | ||
535 | info->nfunctions = nfuncs; | |
536 | info->functions = devm_kzalloc(&pdev->dev, nfuncs * sizeof(struct imx_pmx_func), | |
537 | GFP_KERNEL); | |
538 | if (!info->functions) | |
539 | return -ENOMEM; | |
540 | ||
541 | info->ngroups = 0; | |
542 | for_each_child_of_node(np, child) | |
543 | info->ngroups += of_get_child_count(child); | |
544 | info->groups = devm_kzalloc(&pdev->dev, info->ngroups * sizeof(struct imx_pin_group), | |
545 | GFP_KERNEL); | |
546 | if (!info->groups) | |
547 | return -ENOMEM; | |
548 | ||
549 | for_each_child_of_node(np, child) { | |
550 | ret = imx_pinctrl_parse_functions(child, info, i++); | |
551 | if (ret) { | |
552 | dev_err(&pdev->dev, "failed to parse function\n"); | |
553 | return ret; | |
554 | } | |
555 | } | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | int __devinit imx_pinctrl_probe(struct platform_device *pdev, | |
561 | struct imx_pinctrl_soc_info *info) | |
562 | { | |
563 | struct imx_pinctrl *ipctl; | |
564 | struct resource *res; | |
565 | int ret; | |
566 | ||
567 | if (!info || !info->pins || !info->npins | |
568 | || !info->pin_regs || !info->npin_regs) { | |
569 | dev_err(&pdev->dev, "wrong pinctrl info\n"); | |
570 | return -EINVAL; | |
571 | } | |
572 | info->dev = &pdev->dev; | |
573 | ||
574 | /* Create state holders etc for this driver */ | |
575 | ipctl = devm_kzalloc(&pdev->dev, sizeof(*ipctl), GFP_KERNEL); | |
576 | if (!ipctl) | |
577 | return -ENOMEM; | |
578 | ||
579 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
580 | if (!res) | |
581 | return -ENOENT; | |
582 | ||
583 | ipctl->base = devm_request_and_ioremap(&pdev->dev, res); | |
584 | if (!ipctl->base) | |
585 | return -EBUSY; | |
586 | ||
587 | imx_pinctrl_desc.name = dev_name(&pdev->dev); | |
588 | imx_pinctrl_desc.pins = info->pins; | |
589 | imx_pinctrl_desc.npins = info->npins; | |
590 | ||
591 | ret = imx_pinctrl_probe_dt(pdev, info); | |
592 | if (ret) { | |
593 | dev_err(&pdev->dev, "fail to probe dt properties\n"); | |
594 | return ret; | |
595 | } | |
596 | ||
597 | ipctl->info = info; | |
598 | ipctl->dev = info->dev; | |
599 | platform_set_drvdata(pdev, ipctl); | |
600 | ipctl->pctl = pinctrl_register(&imx_pinctrl_desc, &pdev->dev, ipctl); | |
601 | if (!ipctl->pctl) { | |
602 | dev_err(&pdev->dev, "could not register IMX pinctrl driver\n"); | |
603 | return -EINVAL; | |
604 | } | |
605 | ||
606 | dev_info(&pdev->dev, "initialized IMX pinctrl driver\n"); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | int __devexit imx_pinctrl_remove(struct platform_device *pdev) | |
612 | { | |
613 | struct imx_pinctrl *ipctl = platform_get_drvdata(pdev); | |
614 | ||
615 | pinctrl_unregister(ipctl->pctl); | |
616 | ||
617 | return 0; | |
618 | } |