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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs...
[linux-2.6.git] / drivers / pinctrl / pinctrl-tegra.c
blob2fa9bc6cd7abfcf41bc9635980d0db4d2ec6b5b2
1 /*
2 * Driver for the NVIDIA Tegra pinmux
3 *
4 * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
5 *
6 * Derived from code:
7 * Copyright (C) 2010 Google, Inc.
8 * Copyright (C) 2010 NVIDIA Corporation
9 * Copyright (C) 2009-2011 ST-Ericsson AB
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms and conditions of the GNU General Public License,
13 * version 2, as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 */
20
21 #include <linux/err.h>
22 #include <linux/init.h>
23 #include <linux/io.h>
24 #include <linux/module.h>
25 #include <linux/of.h>
26 #include <linux/platform_device.h>
27 #include <linux/pinctrl/machine.h>
28 #include <linux/pinctrl/pinctrl.h>
29 #include <linux/pinctrl/pinmux.h>
30 #include <linux/pinctrl/pinconf.h>
31 #include <linux/slab.h>
32
33 #include "core.h"
34 #include "pinctrl-tegra.h"
35
36 struct tegra_pmx {
37 struct device *dev;
38 struct pinctrl_dev *pctl;
39
40 const struct tegra_pinctrl_soc_data *soc;
41
42 int nbanks;
43 void __iomem **regs;
44 };
45
46 static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg)
47 {
48 return readl(pmx->regs[bank] + reg);
49 }
50
51 static inline void pmx_writel(struct tegra_pmx *pmx, u32 val, u32 bank, u32 reg)
52 {
53 writel(val, pmx->regs[bank] + reg);
54 }
55
56 static int tegra_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
57 {
58 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
59
60 return pmx->soc->ngroups;
61 }
62
63 static const char *tegra_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
64 unsigned group)
65 {
66 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
67
68 return pmx->soc->groups[group].name;
69 }
70
71 static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
72 unsigned group,
73 const unsigned **pins,
74 unsigned *num_pins)
75 {
76 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
77
78 *pins = pmx->soc->groups[group].pins;
79 *num_pins = pmx->soc->groups[group].npins;
80
81 return 0;
82 }
83
84 #ifdef CONFIG_DEBUG_FS
85 static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
86 struct seq_file *s,
87 unsigned offset)
88 {
89 seq_printf(s, " %s", dev_name(pctldev->dev));
90 }
91 #endif
92
93 static int reserve_map(struct device *dev, struct pinctrl_map **map,
94 unsigned *reserved_maps, unsigned *num_maps,
95 unsigned reserve)
96 {
97 unsigned old_num = *reserved_maps;
98 unsigned new_num = *num_maps + reserve;
99 struct pinctrl_map *new_map;
100
101 if (old_num >= new_num)
102 return 0;
103
104 new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
105 if (!new_map) {
106 dev_err(dev, "krealloc(map) failed\n");
107 return -ENOMEM;
108 }
109
110 memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
111
112 *map = new_map;
113 *reserved_maps = new_num;
114
115 return 0;
116 }
117
118 static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
119 unsigned *num_maps, const char *group,
120 const char *function)
121 {
122 if (WARN_ON(*num_maps == *reserved_maps))
123 return -ENOSPC;
124
125 (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
126 (*map)[*num_maps].data.mux.group = group;
127 (*map)[*num_maps].data.mux.function = function;
128 (*num_maps)++;
129
130 return 0;
131 }
132
133 static int add_map_configs(struct device *dev, struct pinctrl_map **map,
134 unsigned *reserved_maps, unsigned *num_maps,
135 const char *group, unsigned long *configs,
136 unsigned num_configs)
137 {
138 unsigned long *dup_configs;
139
140 if (WARN_ON(*num_maps == *reserved_maps))
141 return -ENOSPC;
142
143 dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
144 GFP_KERNEL);
145 if (!dup_configs) {
146 dev_err(dev, "kmemdup(configs) failed\n");
147 return -ENOMEM;
148 }
149
150 (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
151 (*map)[*num_maps].data.configs.group_or_pin = group;
152 (*map)[*num_maps].data.configs.configs = dup_configs;
153 (*map)[*num_maps].data.configs.num_configs = num_configs;
154 (*num_maps)++;
155
156 return 0;
157 }
158
159 static int add_config(struct device *dev, unsigned long **configs,
160 unsigned *num_configs, unsigned long config)
161 {
162 unsigned old_num = *num_configs;
163 unsigned new_num = old_num + 1;
164 unsigned long *new_configs;
165
166 new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
167 GFP_KERNEL);
168 if (!new_configs) {
169 dev_err(dev, "krealloc(configs) failed\n");
170 return -ENOMEM;
171 }
172
173 new_configs[old_num] = config;
174
175 *configs = new_configs;
176 *num_configs = new_num;
177
178 return 0;
179 }
180
181 static void tegra_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
182 struct pinctrl_map *map,
183 unsigned num_maps)
184 {
185 int i;
186
187 for (i = 0; i < num_maps; i++)
188 if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
189 kfree(map[i].data.configs.configs);
190
191 kfree(map);
192 }
193
194 static const struct cfg_param {
195 const char *property;
196 enum tegra_pinconf_param param;
197 } cfg_params[] = {
198 {"nvidia,pull", TEGRA_PINCONF_PARAM_PULL},
199 {"nvidia,tristate", TEGRA_PINCONF_PARAM_TRISTATE},
200 {"nvidia,enable-input", TEGRA_PINCONF_PARAM_ENABLE_INPUT},
201 {"nvidia,open-drain", TEGRA_PINCONF_PARAM_OPEN_DRAIN},
202 {"nvidia,lock", TEGRA_PINCONF_PARAM_LOCK},
203 {"nvidia,io-reset", TEGRA_PINCONF_PARAM_IORESET},
204 {"nvidia,rcv-sel", TEGRA_PINCONF_PARAM_RCV_SEL},
205 {"nvidia,high-speed-mode", TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE},
206 {"nvidia,schmitt", TEGRA_PINCONF_PARAM_SCHMITT},
207 {"nvidia,low-power-mode", TEGRA_PINCONF_PARAM_LOW_POWER_MODE},
208 {"nvidia,pull-down-strength", TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH},
209 {"nvidia,pull-up-strength", TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH},
210 {"nvidia,slew-rate-falling", TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
211 {"nvidia,slew-rate-rising", TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
212 {"nvidia,drive-type", TEGRA_PINCONF_PARAM_DRIVE_TYPE},
213 };
214
215 static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
216 struct device_node *np,
217 struct pinctrl_map **map,
218 unsigned *reserved_maps,
219 unsigned *num_maps)
220 {
221 int ret, i;
222 const char *function;
223 u32 val;
224 unsigned long config;
225 unsigned long *configs = NULL;
226 unsigned num_configs = 0;
227 unsigned reserve;
228 struct property *prop;
229 const char *group;
230
231 ret = of_property_read_string(np, "nvidia,function", &function);
232 if (ret < 0) {
233 /* EINVAL=missing, which is fine since it's optional */
234 if (ret != -EINVAL)
235 dev_err(dev,
236 "could not parse property nvidia,function\n");
237 function = NULL;
238 }
239
240 for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
241 ret = of_property_read_u32(np, cfg_params[i].property, &val);
242 if (!ret) {
243 config = TEGRA_PINCONF_PACK(cfg_params[i].param, val);
244 ret = add_config(dev, &configs, &num_configs, config);
245 if (ret < 0)
246 goto exit;
247 /* EINVAL=missing, which is fine since it's optional */
248 } else if (ret != -EINVAL) {
249 dev_err(dev, "could not parse property %s\n",
250 cfg_params[i].property);
251 }
252 }
253
254 reserve = 0;
255 if (function != NULL)
256 reserve++;
257 if (num_configs)
258 reserve++;
259 ret = of_property_count_strings(np, "nvidia,pins");
260 if (ret < 0) {
261 dev_err(dev, "could not parse property nvidia,pins\n");
262 goto exit;
263 }
264 reserve *= ret;
265
266 ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
267 if (ret < 0)
268 goto exit;
269
270 of_property_for_each_string(np, "nvidia,pins", prop, group) {
271 if (function) {
272 ret = add_map_mux(map, reserved_maps, num_maps,
273 group, function);
274 if (ret < 0)
275 goto exit;
276 }
277
278 if (num_configs) {
279 ret = add_map_configs(dev, map, reserved_maps,
280 num_maps, group, configs,
281 num_configs);
282 if (ret < 0)
283 goto exit;
284 }
285 }
286
287 ret = 0;
288
289 exit:
290 kfree(configs);
291 return ret;
292 }
293
294 static int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
295 struct device_node *np_config,
296 struct pinctrl_map **map,
297 unsigned *num_maps)
298 {
299 unsigned reserved_maps;
300 struct device_node *np;
301 int ret;
302
303 reserved_maps = 0;
304 *map = NULL;
305 *num_maps = 0;
306
307 for_each_child_of_node(np_config, np) {
308 ret = tegra_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
309 &reserved_maps, num_maps);
310 if (ret < 0) {
311 tegra_pinctrl_dt_free_map(pctldev, *map, *num_maps);
312 return ret;
313 }
314 }
315
316 return 0;
317 }
318
319 static const struct pinctrl_ops tegra_pinctrl_ops = {
320 .get_groups_count = tegra_pinctrl_get_groups_count,
321 .get_group_name = tegra_pinctrl_get_group_name,
322 .get_group_pins = tegra_pinctrl_get_group_pins,
323 #ifdef CONFIG_DEBUG_FS
324 .pin_dbg_show = tegra_pinctrl_pin_dbg_show,
325 #endif
326 .dt_node_to_map = tegra_pinctrl_dt_node_to_map,
327 .dt_free_map = tegra_pinctrl_dt_free_map,
328 };
329
330 static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
331 {
332 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
333
334 return pmx->soc->nfunctions;
335 }
336
337 static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
338 unsigned function)
339 {
340 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
341
342 return pmx->soc->functions[function].name;
343 }
344
345 static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
346 unsigned function,
347 const char * const **groups,
348 unsigned * const num_groups)
349 {
350 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
351
352 *groups = pmx->soc->functions[function].groups;
353 *num_groups = pmx->soc->functions[function].ngroups;
354
355 return 0;
356 }
357
358 static int tegra_pinctrl_enable(struct pinctrl_dev *pctldev, unsigned function,
359 unsigned group)
360 {
361 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
362 const struct tegra_pingroup *g;
363 int i;
364 u32 val;
365
366 g = &pmx->soc->groups[group];
367
368 if (WARN_ON(g->mux_reg < 0))
369 return -EINVAL;
370
371 for (i = 0; i < ARRAY_SIZE(g->funcs); i++) {
372 if (g->funcs[i] == function)
373 break;
374 }
375 if (WARN_ON(i == ARRAY_SIZE(g->funcs)))
376 return -EINVAL;
377
378 val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
379 val &= ~(0x3 << g->mux_bit);
380 val |= i << g->mux_bit;
381 pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
382
383 return 0;
384 }
385
386 static void tegra_pinctrl_disable(struct pinctrl_dev *pctldev,
387 unsigned function, unsigned group)
388 {
389 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
390 const struct tegra_pingroup *g;
391 u32 val;
392
393 g = &pmx->soc->groups[group];
394
395 if (WARN_ON(g->mux_reg < 0))
396 return;
397
398 val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
399 val &= ~(0x3 << g->mux_bit);
400 val |= g->func_safe << g->mux_bit;
401 pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
402 }
403
404 static const struct pinmux_ops tegra_pinmux_ops = {
405 .get_functions_count = tegra_pinctrl_get_funcs_count,
406 .get_function_name = tegra_pinctrl_get_func_name,
407 .get_function_groups = tegra_pinctrl_get_func_groups,
408 .enable = tegra_pinctrl_enable,
409 .disable = tegra_pinctrl_disable,
410 };
411
412 static int tegra_pinconf_reg(struct tegra_pmx *pmx,
413 const struct tegra_pingroup *g,
414 enum tegra_pinconf_param param,
415 bool report_err,
416 s8 *bank, s16 *reg, s8 *bit, s8 *width)
417 {
418 switch (param) {
419 case TEGRA_PINCONF_PARAM_PULL:
420 *bank = g->pupd_bank;
421 *reg = g->pupd_reg;
422 *bit = g->pupd_bit;
423 *width = 2;
424 break;
425 case TEGRA_PINCONF_PARAM_TRISTATE:
426 *bank = g->tri_bank;
427 *reg = g->tri_reg;
428 *bit = g->tri_bit;
429 *width = 1;
430 break;
431 case TEGRA_PINCONF_PARAM_ENABLE_INPUT:
432 *bank = g->einput_bank;
433 *reg = g->einput_reg;
434 *bit = g->einput_bit;
435 *width = 1;
436 break;
437 case TEGRA_PINCONF_PARAM_OPEN_DRAIN:
438 *bank = g->odrain_bank;
439 *reg = g->odrain_reg;
440 *bit = g->odrain_bit;
441 *width = 1;
442 break;
443 case TEGRA_PINCONF_PARAM_LOCK:
444 *bank = g->lock_bank;
445 *reg = g->lock_reg;
446 *bit = g->lock_bit;
447 *width = 1;
448 break;
449 case TEGRA_PINCONF_PARAM_IORESET:
450 *bank = g->ioreset_bank;
451 *reg = g->ioreset_reg;
452 *bit = g->ioreset_bit;
453 *width = 1;
454 break;
455 case TEGRA_PINCONF_PARAM_RCV_SEL:
456 *bank = g->rcv_sel_bank;
457 *reg = g->rcv_sel_reg;
458 *bit = g->rcv_sel_bit;
459 *width = 1;
460 break;
461 case TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE:
462 *bank = g->drv_bank;
463 *reg = g->drv_reg;
464 *bit = g->hsm_bit;
465 *width = 1;
466 break;
467 case TEGRA_PINCONF_PARAM_SCHMITT:
468 *bank = g->drv_bank;
469 *reg = g->drv_reg;
470 *bit = g->schmitt_bit;
471 *width = 1;
472 break;
473 case TEGRA_PINCONF_PARAM_LOW_POWER_MODE:
474 *bank = g->drv_bank;
475 *reg = g->drv_reg;
476 *bit = g->lpmd_bit;
477 *width = 2;
478 break;
479 case TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH:
480 *bank = g->drv_bank;
481 *reg = g->drv_reg;
482 *bit = g->drvdn_bit;
483 *width = g->drvdn_width;
484 break;
485 case TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH:
486 *bank = g->drv_bank;
487 *reg = g->drv_reg;
488 *bit = g->drvup_bit;
489 *width = g->drvup_width;
490 break;
491 case TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING:
492 *bank = g->drv_bank;
493 *reg = g->drv_reg;
494 *bit = g->slwf_bit;
495 *width = g->slwf_width;
496 break;
497 case TEGRA_PINCONF_PARAM_SLEW_RATE_RISING:
498 *bank = g->drv_bank;
499 *reg = g->drv_reg;
500 *bit = g->slwr_bit;
501 *width = g->slwr_width;
502 break;
503 case TEGRA_PINCONF_PARAM_DRIVE_TYPE:
504 *bank = g->drvtype_bank;
505 *reg = g->drvtype_reg;
506 *bit = g->drvtype_bit;
507 *width = 2;
508 break;
509 default:
510 dev_err(pmx->dev, "Invalid config param %04x\n", param);
511 return -ENOTSUPP;
512 }
513
514 if (*reg < 0) {
515 if (report_err)
516 dev_err(pmx->dev,
517 "Config param %04x not supported on group %s\n",
518 param, g->name);
519 return -ENOTSUPP;
520 }
521
522 return 0;
523 }
524
525 static int tegra_pinconf_get(struct pinctrl_dev *pctldev,
526 unsigned pin, unsigned long *config)
527 {
528 dev_err(pctldev->dev, "pin_config_get op not supported\n");
529 return -ENOTSUPP;
530 }
531
532 static int tegra_pinconf_set(struct pinctrl_dev *pctldev,
533 unsigned pin, unsigned long config)
534 {
535 dev_err(pctldev->dev, "pin_config_set op not supported\n");
536 return -ENOTSUPP;
537 }
538
539 static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev,
540 unsigned group, unsigned long *config)
541 {
542 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
543 enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(*config);
544 u16 arg;
545 const struct tegra_pingroup *g;
546 int ret;
547 s8 bank, bit, width;
548 s16 reg;
549 u32 val, mask;
550
551 g = &pmx->soc->groups[group];
552
553 ret = tegra_pinconf_reg(pmx, g, param, true, &bank, &reg, &bit,
554 &width);
555 if (ret < 0)
556 return ret;
557
558 val = pmx_readl(pmx, bank, reg);
559 mask = (1 << width) - 1;
560 arg = (val >> bit) & mask;
561
562 *config = TEGRA_PINCONF_PACK(param, arg);
563
564 return 0;
565 }
566
567 static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
568 unsigned group, unsigned long config)
569 {
570 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
571 enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
572 u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
573 const struct tegra_pingroup *g;
574 int ret;
575 s8 bank, bit, width;
576 s16 reg;
577 u32 val, mask;
578
579 g = &pmx->soc->groups[group];
580
581 ret = tegra_pinconf_reg(pmx, g, param, true, &bank, &reg, &bit,
582 &width);
583 if (ret < 0)
584 return ret;
585
586 val = pmx_readl(pmx, bank, reg);
587
588 /* LOCK can't be cleared */
589 if (param == TEGRA_PINCONF_PARAM_LOCK) {
590 if ((val & BIT(bit)) && !arg) {
591 dev_err(pctldev->dev, "LOCK bit cannot be cleared\n");
592 return -EINVAL;
593 }
594 }
595
596 /* Special-case Boolean values; allow any non-zero as true */
597 if (width == 1)
598 arg = !!arg;
599
600 /* Range-check user-supplied value */
601 mask = (1 << width) - 1;
602 if (arg & ~mask) {
603 dev_err(pctldev->dev,
604 "config %lx: %x too big for %d bit register\n",
605 config, arg, width);
606 return -EINVAL;
607 }
608
609 /* Update register */
610 val &= ~(mask << bit);
611 val |= arg << bit;
612 pmx_writel(pmx, val, bank, reg);
613
614 return 0;
615 }
616
617 #ifdef CONFIG_DEBUG_FS
618 static void tegra_pinconf_dbg_show(struct pinctrl_dev *pctldev,
619 struct seq_file *s, unsigned offset)
620 {
621 }
622
623 static const char *strip_prefix(const char *s)
624 {
625 const char *comma = strchr(s, ',');
626 if (!comma)
627 return s;
628
629 return comma + 1;
630 }
631
632 static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
633 struct seq_file *s, unsigned group)
634 {
635 struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
636 const struct tegra_pingroup *g;
637 int i, ret;
638 s8 bank, bit, width;
639 s16 reg;
640 u32 val;
641
642 g = &pmx->soc->groups[group];
643
644 for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
645 ret = tegra_pinconf_reg(pmx, g, cfg_params[i].param, false,
646 &bank, &reg, &bit, &width);
647 if (ret < 0)
648 continue;
649
650 val = pmx_readl(pmx, bank, reg);
651 val >>= bit;
652 val &= (1 << width) - 1;
653
654 seq_printf(s, "\n\t%s=%u",
655 strip_prefix(cfg_params[i].property), val);
656 }
657 }
658
659 static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,
660 struct seq_file *s,
661 unsigned long config)
662 {
663 enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
664 u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
665 const char *pname = "unknown";
666 int i;
667
668 for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
669 if (cfg_params[i].param == param) {
670 pname = cfg_params[i].property;
671 break;
672 }
673 }
674
675 seq_printf(s, "%s=%d", strip_prefix(pname), arg);
676 }
677 #endif
678
679 static const struct pinconf_ops tegra_pinconf_ops = {
680 .pin_config_get = tegra_pinconf_get,
681 .pin_config_set = tegra_pinconf_set,
682 .pin_config_group_get = tegra_pinconf_group_get,
683 .pin_config_group_set = tegra_pinconf_group_set,
684 #ifdef CONFIG_DEBUG_FS
685 .pin_config_dbg_show = tegra_pinconf_dbg_show,
686 .pin_config_group_dbg_show = tegra_pinconf_group_dbg_show,
687 .pin_config_config_dbg_show = tegra_pinconf_config_dbg_show,
688 #endif
689 };
690
691 static struct pinctrl_gpio_range tegra_pinctrl_gpio_range = {
692 .name = "Tegra GPIOs",
693 .id = 0,
694 .base = 0,
695 };
696
697 static struct pinctrl_desc tegra_pinctrl_desc = {
698 .pctlops = &tegra_pinctrl_ops,
699 .pmxops = &tegra_pinmux_ops,
700 .confops = &tegra_pinconf_ops,
701 .owner = THIS_MODULE,
702 };
703
704 int tegra_pinctrl_probe(struct platform_device *pdev,
705 const struct tegra_pinctrl_soc_data *soc_data)
706 {
707 struct tegra_pmx *pmx;
708 struct resource *res;
709 int i;
710
711 pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
712 if (!pmx) {
713 dev_err(&pdev->dev, "Can't alloc tegra_pmx\n");
714 return -ENOMEM;
715 }
716 pmx->dev = &pdev->dev;
717 pmx->soc = soc_data;
718
719 tegra_pinctrl_gpio_range.npins = pmx->soc->ngpios;
720 tegra_pinctrl_desc.name = dev_name(&pdev->dev);
721 tegra_pinctrl_desc.pins = pmx->soc->pins;
722 tegra_pinctrl_desc.npins = pmx->soc->npins;
723
724 for (i = 0; ; i++) {
725 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
726 if (!res)
727 break;
728 }
729 pmx->nbanks = i;
730
731 pmx->regs = devm_kzalloc(&pdev->dev, pmx->nbanks * sizeof(*pmx->regs),
732 GFP_KERNEL);
733 if (!pmx->regs) {
734 dev_err(&pdev->dev, "Can't alloc regs pointer\n");
735 return -ENODEV;
736 }
737
738 for (i = 0; i < pmx->nbanks; i++) {
739 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
740 if (!res) {
741 dev_err(&pdev->dev, "Missing MEM resource\n");
742 return -ENODEV;
743 }
744
745 if (!devm_request_mem_region(&pdev->dev, res->start,
746 resource_size(res),
747 dev_name(&pdev->dev))) {
748 dev_err(&pdev->dev,
749 "Couldn't request MEM resource %d\n", i);
750 return -ENODEV;
751 }
752
753 pmx->regs[i] = devm_ioremap(&pdev->dev, res->start,
754 resource_size(res));
755 if (!pmx->regs[i]) {
756 dev_err(&pdev->dev, "Couldn't ioremap regs %d\n", i);
757 return -ENODEV;
758 }
759 }
760
761 pmx->pctl = pinctrl_register(&tegra_pinctrl_desc, &pdev->dev, pmx);
762 if (!pmx->pctl) {
763 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
764 return -ENODEV;
765 }
766
767 pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range);
768
769 platform_set_drvdata(pdev, pmx);
770
771 dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n");
772
773 return 0;
774 }
775 EXPORT_SYMBOL_GPL(tegra_pinctrl_probe);
776
777 int tegra_pinctrl_remove(struct platform_device *pdev)
778 {
779 struct tegra_pmx *pmx = platform_get_drvdata(pdev);
780
781 pinctrl_unregister(pmx->pctl);
782
783 return 0;
784 }
785 EXPORT_SYMBOL_GPL(tegra_pinctrl_remove);
Linus' kernel tree