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ARM: dts: Add emac nodes to the rk3188 device tree
[deliverable/linux.git] / drivers / pinctrl / pinctrl-rockchip.c
1 /*
2 * Pinctrl driver for Rockchip SoCs
3 *
4 * Copyright (c) 2013 MundoReader S.L.
5 * Author: Heiko Stuebner <heiko@sntech.de>
6 *
7 * With some ideas taken from pinctrl-samsung:
8 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
9 * http://www.samsung.com
10 * Copyright (c) 2012 Linaro Ltd
11 * http://www.linaro.org
12 *
13 * and pinctrl-at91:
14 * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as published
18 * by the Free Software Foundation.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
26 #include <linux/module.h>
27 #include <linux/platform_device.h>
28 #include <linux/io.h>
29 #include <linux/bitops.h>
30 #include <linux/gpio.h>
31 #include <linux/of_address.h>
32 #include <linux/of_irq.h>
33 #include <linux/pinctrl/machine.h>
34 #include <linux/pinctrl/pinconf.h>
35 #include <linux/pinctrl/pinctrl.h>
36 #include <linux/pinctrl/pinmux.h>
37 #include <linux/pinctrl/pinconf-generic.h>
38 #include <linux/irqchip/chained_irq.h>
39 #include <linux/clk.h>
40 #include <linux/regmap.h>
41 #include <linux/mfd/syscon.h>
42 #include <dt-bindings/pinctrl/rockchip.h>
43
44 #include "core.h"
45 #include "pinconf.h"
46
47 /* GPIO control registers */
48 #define GPIO_SWPORT_DR 0x00
49 #define GPIO_SWPORT_DDR 0x04
50 #define GPIO_INTEN 0x30
51 #define GPIO_INTMASK 0x34
52 #define GPIO_INTTYPE_LEVEL 0x38
53 #define GPIO_INT_POLARITY 0x3c
54 #define GPIO_INT_STATUS 0x40
55 #define GPIO_INT_RAWSTATUS 0x44
56 #define GPIO_DEBOUNCE 0x48
57 #define GPIO_PORTS_EOI 0x4c
58 #define GPIO_EXT_PORT 0x50
59 #define GPIO_LS_SYNC 0x60
60
61 enum rockchip_pinctrl_type {
62 RK2928,
63 RK3066B,
64 RK3188,
65 RK3288,
66 };
67
68 /**
69 * Encode variants of iomux registers into a type variable
70 */
71 #define IOMUX_GPIO_ONLY BIT(0)
72 #define IOMUX_WIDTH_4BIT BIT(1)
73 #define IOMUX_SOURCE_PMU BIT(2)
74 #define IOMUX_UNROUTED BIT(3)
75
76 /**
77 * @type: iomux variant using IOMUX_* constants
78 * @offset: if initialized to -1 it will be autocalculated, by specifying
79 * an initial offset value the relevant source offset can be reset
80 * to a new value for autocalculating the following iomux registers.
81 */
82 struct rockchip_iomux {
83 int type;
84 int offset;
85 };
86
87 /**
88 * @reg_base: register base of the gpio bank
89 * @reg_pull: optional separate register for additional pull settings
90 * @clk: clock of the gpio bank
91 * @irq: interrupt of the gpio bank
92 * @pin_base: first pin number
93 * @nr_pins: number of pins in this bank
94 * @name: name of the bank
95 * @bank_num: number of the bank, to account for holes
96 * @iomux: array describing the 4 iomux sources of the bank
97 * @valid: are all necessary informations present
98 * @of_node: dt node of this bank
99 * @drvdata: common pinctrl basedata
100 * @domain: irqdomain of the gpio bank
101 * @gpio_chip: gpiolib chip
102 * @grange: gpio range
103 * @slock: spinlock for the gpio bank
104 */
105 struct rockchip_pin_bank {
106 void __iomem *reg_base;
107 struct regmap *regmap_pull;
108 struct clk *clk;
109 int irq;
110 u32 pin_base;
111 u8 nr_pins;
112 char *name;
113 u8 bank_num;
114 struct rockchip_iomux iomux[4];
115 bool valid;
116 struct device_node *of_node;
117 struct rockchip_pinctrl *drvdata;
118 struct irq_domain *domain;
119 struct gpio_chip gpio_chip;
120 struct pinctrl_gpio_range grange;
121 spinlock_t slock;
122 u32 toggle_edge_mode;
123 };
124
125 #define PIN_BANK(id, pins, label) \
126 { \
127 .bank_num = id, \
128 .nr_pins = pins, \
129 .name = label, \
130 .iomux = { \
131 { .offset = -1 }, \
132 { .offset = -1 }, \
133 { .offset = -1 }, \
134 { .offset = -1 }, \
135 }, \
136 }
137
138 #define PIN_BANK_IOMUX_FLAGS(id, pins, label, iom0, iom1, iom2, iom3) \
139 { \
140 .bank_num = id, \
141 .nr_pins = pins, \
142 .name = label, \
143 .iomux = { \
144 { .type = iom0, .offset = -1 }, \
145 { .type = iom1, .offset = -1 }, \
146 { .type = iom2, .offset = -1 }, \
147 { .type = iom3, .offset = -1 }, \
148 }, \
149 }
150
151 /**
152 */
153 struct rockchip_pin_ctrl {
154 struct rockchip_pin_bank *pin_banks;
155 u32 nr_banks;
156 u32 nr_pins;
157 char *label;
158 enum rockchip_pinctrl_type type;
159 int grf_mux_offset;
160 int pmu_mux_offset;
161 void (*pull_calc_reg)(struct rockchip_pin_bank *bank,
162 int pin_num, struct regmap **regmap,
163 int *reg, u8 *bit);
164 };
165
166 struct rockchip_pin_config {
167 unsigned int func;
168 unsigned long *configs;
169 unsigned int nconfigs;
170 };
171
172 /**
173 * struct rockchip_pin_group: represent group of pins of a pinmux function.
174 * @name: name of the pin group, used to lookup the group.
175 * @pins: the pins included in this group.
176 * @npins: number of pins included in this group.
177 * @func: the mux function number to be programmed when selected.
178 * @configs: the config values to be set for each pin
179 * @nconfigs: number of configs for each pin
180 */
181 struct rockchip_pin_group {
182 const char *name;
183 unsigned int npins;
184 unsigned int *pins;
185 struct rockchip_pin_config *data;
186 };
187
188 /**
189 * struct rockchip_pmx_func: represent a pin function.
190 * @name: name of the pin function, used to lookup the function.
191 * @groups: one or more names of pin groups that provide this function.
192 * @num_groups: number of groups included in @groups.
193 */
194 struct rockchip_pmx_func {
195 const char *name;
196 const char **groups;
197 u8 ngroups;
198 };
199
200 struct rockchip_pinctrl {
201 struct regmap *regmap_base;
202 int reg_size;
203 struct regmap *regmap_pull;
204 struct regmap *regmap_pmu;
205 struct device *dev;
206 struct rockchip_pin_ctrl *ctrl;
207 struct pinctrl_desc pctl;
208 struct pinctrl_dev *pctl_dev;
209 struct rockchip_pin_group *groups;
210 unsigned int ngroups;
211 struct rockchip_pmx_func *functions;
212 unsigned int nfunctions;
213 };
214
215 static struct regmap_config rockchip_regmap_config = {
216 .reg_bits = 32,
217 .val_bits = 32,
218 .reg_stride = 4,
219 };
220
221 static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
222 {
223 return container_of(gc, struct rockchip_pin_bank, gpio_chip);
224 }
225
226 static const inline struct rockchip_pin_group *pinctrl_name_to_group(
227 const struct rockchip_pinctrl *info,
228 const char *name)
229 {
230 int i;
231
232 for (i = 0; i < info->ngroups; i++) {
233 if (!strcmp(info->groups[i].name, name))
234 return &info->groups[i];
235 }
236
237 return NULL;
238 }
239
240 /*
241 * given a pin number that is local to a pin controller, find out the pin bank
242 * and the register base of the pin bank.
243 */
244 static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
245 unsigned pin)
246 {
247 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
248
249 while (pin >= (b->pin_base + b->nr_pins))
250 b++;
251
252 return b;
253 }
254
255 static struct rockchip_pin_bank *bank_num_to_bank(
256 struct rockchip_pinctrl *info,
257 unsigned num)
258 {
259 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
260 int i;
261
262 for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
263 if (b->bank_num == num)
264 return b;
265 }
266
267 return ERR_PTR(-EINVAL);
268 }
269
270 /*
271 * Pinctrl_ops handling
272 */
273
274 static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
275 {
276 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
277
278 return info->ngroups;
279 }
280
281 static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
282 unsigned selector)
283 {
284 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
285
286 return info->groups[selector].name;
287 }
288
289 static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
290 unsigned selector, const unsigned **pins,
291 unsigned *npins)
292 {
293 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
294
295 if (selector >= info->ngroups)
296 return -EINVAL;
297
298 *pins = info->groups[selector].pins;
299 *npins = info->groups[selector].npins;
300
301 return 0;
302 }
303
304 static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
305 struct device_node *np,
306 struct pinctrl_map **map, unsigned *num_maps)
307 {
308 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
309 const struct rockchip_pin_group *grp;
310 struct pinctrl_map *new_map;
311 struct device_node *parent;
312 int map_num = 1;
313 int i;
314
315 /*
316 * first find the group of this node and check if we need to create
317 * config maps for pins
318 */
319 grp = pinctrl_name_to_group(info, np->name);
320 if (!grp) {
321 dev_err(info->dev, "unable to find group for node %s\n",
322 np->name);
323 return -EINVAL;
324 }
325
326 map_num += grp->npins;
327 new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
328 GFP_KERNEL);
329 if (!new_map)
330 return -ENOMEM;
331
332 *map = new_map;
333 *num_maps = map_num;
334
335 /* create mux map */
336 parent = of_get_parent(np);
337 if (!parent) {
338 devm_kfree(pctldev->dev, new_map);
339 return -EINVAL;
340 }
341 new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
342 new_map[0].data.mux.function = parent->name;
343 new_map[0].data.mux.group = np->name;
344 of_node_put(parent);
345
346 /* create config map */
347 new_map++;
348 for (i = 0; i < grp->npins; i++) {
349 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
350 new_map[i].data.configs.group_or_pin =
351 pin_get_name(pctldev, grp->pins[i]);
352 new_map[i].data.configs.configs = grp->data[i].configs;
353 new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
354 }
355
356 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
357 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
358
359 return 0;
360 }
361
362 static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
363 struct pinctrl_map *map, unsigned num_maps)
364 {
365 }
366
367 static const struct pinctrl_ops rockchip_pctrl_ops = {
368 .get_groups_count = rockchip_get_groups_count,
369 .get_group_name = rockchip_get_group_name,
370 .get_group_pins = rockchip_get_group_pins,
371 .dt_node_to_map = rockchip_dt_node_to_map,
372 .dt_free_map = rockchip_dt_free_map,
373 };
374
375 /*
376 * Hardware access
377 */
378
379 static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
380 {
381 struct rockchip_pinctrl *info = bank->drvdata;
382 int iomux_num = (pin / 8);
383 struct regmap *regmap;
384 unsigned int val;
385 int reg, ret, mask;
386 u8 bit;
387
388 if (iomux_num > 3)
389 return -EINVAL;
390
391 if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
392 dev_err(info->dev, "pin %d is unrouted\n", pin);
393 return -EINVAL;
394 }
395
396 if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY)
397 return RK_FUNC_GPIO;
398
399 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
400 ? info->regmap_pmu : info->regmap_base;
401
402 /* get basic quadrupel of mux registers and the correct reg inside */
403 mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
404 reg = bank->iomux[iomux_num].offset;
405 if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
406 if ((pin % 8) >= 4)
407 reg += 0x4;
408 bit = (pin % 4) * 4;
409 } else {
410 bit = (pin % 8) * 2;
411 }
412
413 ret = regmap_read(regmap, reg, &val);
414 if (ret)
415 return ret;
416
417 return ((val >> bit) & mask);
418 }
419
420 /*
421 * Set a new mux function for a pin.
422 *
423 * The register is divided into the upper and lower 16 bit. When changing
424 * a value, the previous register value is not read and changed. Instead
425 * it seems the changed bits are marked in the upper 16 bit, while the
426 * changed value gets set in the same offset in the lower 16 bit.
427 * All pin settings seem to be 2 bit wide in both the upper and lower
428 * parts.
429 * @bank: pin bank to change
430 * @pin: pin to change
431 * @mux: new mux function to set
432 */
433 static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
434 {
435 struct rockchip_pinctrl *info = bank->drvdata;
436 int iomux_num = (pin / 8);
437 struct regmap *regmap;
438 int reg, ret, mask;
439 unsigned long flags;
440 u8 bit;
441 u32 data, rmask;
442
443 if (iomux_num > 3)
444 return -EINVAL;
445
446 if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
447 dev_err(info->dev, "pin %d is unrouted\n", pin);
448 return -EINVAL;
449 }
450
451 if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {
452 if (mux != RK_FUNC_GPIO) {
453 dev_err(info->dev,
454 "pin %d only supports a gpio mux\n", pin);
455 return -ENOTSUPP;
456 } else {
457 return 0;
458 }
459 }
460
461 dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
462 bank->bank_num, pin, mux);
463
464 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
465 ? info->regmap_pmu : info->regmap_base;
466
467 /* get basic quadrupel of mux registers and the correct reg inside */
468 mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
469 reg = bank->iomux[iomux_num].offset;
470 if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
471 if ((pin % 8) >= 4)
472 reg += 0x4;
473 bit = (pin % 4) * 4;
474 } else {
475 bit = (pin % 8) * 2;
476 }
477
478 spin_lock_irqsave(&bank->slock, flags);
479
480 data = (mask << (bit + 16));
481 rmask = data | (data >> 16);
482 data |= (mux & mask) << bit;
483 ret = regmap_update_bits(regmap, reg, rmask, data);
484
485 spin_unlock_irqrestore(&bank->slock, flags);
486
487 return ret;
488 }
489
490 #define RK2928_PULL_OFFSET 0x118
491 #define RK2928_PULL_PINS_PER_REG 16
492 #define RK2928_PULL_BANK_STRIDE 8
493
494 static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
495 int pin_num, struct regmap **regmap,
496 int *reg, u8 *bit)
497 {
498 struct rockchip_pinctrl *info = bank->drvdata;
499
500 *regmap = info->regmap_base;
501 *reg = RK2928_PULL_OFFSET;
502 *reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
503 *reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
504
505 *bit = pin_num % RK2928_PULL_PINS_PER_REG;
506 };
507
508 #define RK3188_PULL_OFFSET 0x164
509 #define RK3188_PULL_BITS_PER_PIN 2
510 #define RK3188_PULL_PINS_PER_REG 8
511 #define RK3188_PULL_BANK_STRIDE 16
512 #define RK3188_PULL_PMU_OFFSET 0x64
513
514 static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
515 int pin_num, struct regmap **regmap,
516 int *reg, u8 *bit)
517 {
518 struct rockchip_pinctrl *info = bank->drvdata;
519
520 /* The first 12 pins of the first bank are located elsewhere */
521 if (bank->bank_num == 0 && pin_num < 12) {
522 *regmap = info->regmap_pmu ? info->regmap_pmu
523 : bank->regmap_pull;
524 *reg = info->regmap_pmu ? RK3188_PULL_PMU_OFFSET : 0;
525 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
526 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
527 *bit *= RK3188_PULL_BITS_PER_PIN;
528 } else {
529 *regmap = info->regmap_pull ? info->regmap_pull
530 : info->regmap_base;
531 *reg = info->regmap_pull ? 0 : RK3188_PULL_OFFSET;
532
533 /* correct the offset, as it is the 2nd pull register */
534 *reg -= 4;
535 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
536 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
537
538 /*
539 * The bits in these registers have an inverse ordering
540 * with the lowest pin being in bits 15:14 and the highest
541 * pin in bits 1:0
542 */
543 *bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
544 *bit *= RK3188_PULL_BITS_PER_PIN;
545 }
546 }
547
548 #define RK3288_PULL_OFFSET 0x140
549 static void rk3288_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
550 int pin_num, struct regmap **regmap,
551 int *reg, u8 *bit)
552 {
553 struct rockchip_pinctrl *info = bank->drvdata;
554
555 /* The first 24 pins of the first bank are located in PMU */
556 if (bank->bank_num == 0) {
557 *regmap = info->regmap_pmu;
558 *reg = RK3188_PULL_PMU_OFFSET;
559
560 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
561 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
562 *bit *= RK3188_PULL_BITS_PER_PIN;
563 } else {
564 *regmap = info->regmap_base;
565 *reg = RK3288_PULL_OFFSET;
566
567 /* correct the offset, as we're starting with the 2nd bank */
568 *reg -= 0x10;
569 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
570 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
571
572 *bit = (pin_num % RK3188_PULL_PINS_PER_REG);
573 *bit *= RK3188_PULL_BITS_PER_PIN;
574 }
575 }
576
577 #define RK3288_DRV_PMU_OFFSET 0x70
578 #define RK3288_DRV_GRF_OFFSET 0x1c0
579 #define RK3288_DRV_BITS_PER_PIN 2
580 #define RK3288_DRV_PINS_PER_REG 8
581 #define RK3288_DRV_BANK_STRIDE 16
582 static int rk3288_drv_list[] = { 2, 4, 8, 12 };
583
584 static void rk3288_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
585 int pin_num, struct regmap **regmap,
586 int *reg, u8 *bit)
587 {
588 struct rockchip_pinctrl *info = bank->drvdata;
589
590 /* The first 24 pins of the first bank are located in PMU */
591 if (bank->bank_num == 0) {
592 *regmap = info->regmap_pmu;
593 *reg = RK3288_DRV_PMU_OFFSET;
594
595 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
596 *bit = pin_num % RK3288_DRV_PINS_PER_REG;
597 *bit *= RK3288_DRV_BITS_PER_PIN;
598 } else {
599 *regmap = info->regmap_base;
600 *reg = RK3288_DRV_GRF_OFFSET;
601
602 /* correct the offset, as we're starting with the 2nd bank */
603 *reg -= 0x10;
604 *reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
605 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
606
607 *bit = (pin_num % RK3288_DRV_PINS_PER_REG);
608 *bit *= RK3288_DRV_BITS_PER_PIN;
609 }
610 }
611
612 static int rk3288_get_drive(struct rockchip_pin_bank *bank, int pin_num)
613 {
614 struct regmap *regmap;
615 int reg, ret;
616 u32 data;
617 u8 bit;
618
619 rk3288_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
620
621 ret = regmap_read(regmap, reg, &data);
622 if (ret)
623 return ret;
624
625 data >>= bit;
626 data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1;
627
628 return rk3288_drv_list[data];
629 }
630
631 static int rk3288_set_drive(struct rockchip_pin_bank *bank, int pin_num,
632 int strength)
633 {
634 struct rockchip_pinctrl *info = bank->drvdata;
635 struct regmap *regmap;
636 unsigned long flags;
637 int reg, ret, i;
638 u32 data, rmask;
639 u8 bit;
640
641 rk3288_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
642
643 ret = -EINVAL;
644 for (i = 0; i < ARRAY_SIZE(rk3288_drv_list); i++) {
645 if (rk3288_drv_list[i] == strength) {
646 ret = i;
647 break;
648 }
649 }
650
651 if (ret < 0) {
652 dev_err(info->dev, "unsupported driver strength %d\n",
653 strength);
654 return ret;
655 }
656
657 spin_lock_irqsave(&bank->slock, flags);
658
659 /* enable the write to the equivalent lower bits */
660 data = ((1 << RK3288_DRV_BITS_PER_PIN) - 1) << (bit + 16);
661 rmask = data | (data >> 16);
662 data |= (ret << bit);
663
664 ret = regmap_update_bits(regmap, reg, rmask, data);
665 spin_unlock_irqrestore(&bank->slock, flags);
666
667 return ret;
668 }
669
670 static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
671 {
672 struct rockchip_pinctrl *info = bank->drvdata;
673 struct rockchip_pin_ctrl *ctrl = info->ctrl;
674 struct regmap *regmap;
675 int reg, ret;
676 u8 bit;
677 u32 data;
678
679 /* rk3066b does support any pulls */
680 if (ctrl->type == RK3066B)
681 return PIN_CONFIG_BIAS_DISABLE;
682
683 ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
684
685 ret = regmap_read(regmap, reg, &data);
686 if (ret)
687 return ret;
688
689 switch (ctrl->type) {
690 case RK2928:
691 return !(data & BIT(bit))
692 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
693 : PIN_CONFIG_BIAS_DISABLE;
694 case RK3188:
695 case RK3288:
696 data >>= bit;
697 data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
698
699 switch (data) {
700 case 0:
701 return PIN_CONFIG_BIAS_DISABLE;
702 case 1:
703 return PIN_CONFIG_BIAS_PULL_UP;
704 case 2:
705 return PIN_CONFIG_BIAS_PULL_DOWN;
706 case 3:
707 return PIN_CONFIG_BIAS_BUS_HOLD;
708 }
709
710 dev_err(info->dev, "unknown pull setting\n");
711 return -EIO;
712 default:
713 dev_err(info->dev, "unsupported pinctrl type\n");
714 return -EINVAL;
715 };
716 }
717
718 static int rockchip_set_pull(struct rockchip_pin_bank *bank,
719 int pin_num, int pull)
720 {
721 struct rockchip_pinctrl *info = bank->drvdata;
722 struct rockchip_pin_ctrl *ctrl = info->ctrl;
723 struct regmap *regmap;
724 int reg, ret;
725 unsigned long flags;
726 u8 bit;
727 u32 data, rmask;
728
729 dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
730 bank->bank_num, pin_num, pull);
731
732 /* rk3066b does support any pulls */
733 if (ctrl->type == RK3066B)
734 return pull ? -EINVAL : 0;
735
736 ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
737
738 switch (ctrl->type) {
739 case RK2928:
740 spin_lock_irqsave(&bank->slock, flags);
741
742 data = BIT(bit + 16);
743 if (pull == PIN_CONFIG_BIAS_DISABLE)
744 data |= BIT(bit);
745 ret = regmap_write(regmap, reg, data);
746
747 spin_unlock_irqrestore(&bank->slock, flags);
748 break;
749 case RK3188:
750 case RK3288:
751 spin_lock_irqsave(&bank->slock, flags);
752
753 /* enable the write to the equivalent lower bits */
754 data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
755 rmask = data | (data >> 16);
756
757 switch (pull) {
758 case PIN_CONFIG_BIAS_DISABLE:
759 break;
760 case PIN_CONFIG_BIAS_PULL_UP:
761 data |= (1 << bit);
762 break;
763 case PIN_CONFIG_BIAS_PULL_DOWN:
764 data |= (2 << bit);
765 break;
766 case PIN_CONFIG_BIAS_BUS_HOLD:
767 data |= (3 << bit);
768 break;
769 default:
770 spin_unlock_irqrestore(&bank->slock, flags);
771 dev_err(info->dev, "unsupported pull setting %d\n",
772 pull);
773 return -EINVAL;
774 }
775
776 ret = regmap_update_bits(regmap, reg, rmask, data);
777
778 spin_unlock_irqrestore(&bank->slock, flags);
779 break;
780 default:
781 dev_err(info->dev, "unsupported pinctrl type\n");
782 return -EINVAL;
783 }
784
785 return ret;
786 }
787
788 /*
789 * Pinmux_ops handling
790 */
791
792 static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
793 {
794 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
795
796 return info->nfunctions;
797 }
798
799 static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
800 unsigned selector)
801 {
802 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
803
804 return info->functions[selector].name;
805 }
806
807 static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
808 unsigned selector, const char * const **groups,
809 unsigned * const num_groups)
810 {
811 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
812
813 *groups = info->functions[selector].groups;
814 *num_groups = info->functions[selector].ngroups;
815
816 return 0;
817 }
818
819 static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
820 unsigned group)
821 {
822 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
823 const unsigned int *pins = info->groups[group].pins;
824 const struct rockchip_pin_config *data = info->groups[group].data;
825 struct rockchip_pin_bank *bank;
826 int cnt, ret = 0;
827
828 dev_dbg(info->dev, "enable function %s group %s\n",
829 info->functions[selector].name, info->groups[group].name);
830
831 /*
832 * for each pin in the pin group selected, program the correspoding pin
833 * pin function number in the config register.
834 */
835 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
836 bank = pin_to_bank(info, pins[cnt]);
837 ret = rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
838 data[cnt].func);
839 if (ret)
840 break;
841 }
842
843 if (ret) {
844 /* revert the already done pin settings */
845 for (cnt--; cnt >= 0; cnt--)
846 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
847
848 return ret;
849 }
850
851 return 0;
852 }
853
854 /*
855 * The calls to gpio_direction_output() and gpio_direction_input()
856 * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
857 * function called from the gpiolib interface).
858 */
859 static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
860 struct pinctrl_gpio_range *range,
861 unsigned offset, bool input)
862 {
863 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
864 struct rockchip_pin_bank *bank;
865 struct gpio_chip *chip;
866 int pin, ret;
867 u32 data;
868
869 chip = range->gc;
870 bank = gc_to_pin_bank(chip);
871 pin = offset - chip->base;
872
873 dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
874 offset, range->name, pin, input ? "input" : "output");
875
876 ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
877 if (ret < 0)
878 return ret;
879
880 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
881 /* set bit to 1 for output, 0 for input */
882 if (!input)
883 data |= BIT(pin);
884 else
885 data &= ~BIT(pin);
886 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
887
888 return 0;
889 }
890
891 static const struct pinmux_ops rockchip_pmx_ops = {
892 .get_functions_count = rockchip_pmx_get_funcs_count,
893 .get_function_name = rockchip_pmx_get_func_name,
894 .get_function_groups = rockchip_pmx_get_groups,
895 .enable = rockchip_pmx_enable,
896 .gpio_set_direction = rockchip_pmx_gpio_set_direction,
897 };
898
899 /*
900 * Pinconf_ops handling
901 */
902
903 static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
904 enum pin_config_param pull)
905 {
906 switch (ctrl->type) {
907 case RK2928:
908 return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
909 pull == PIN_CONFIG_BIAS_DISABLE);
910 case RK3066B:
911 return pull ? false : true;
912 case RK3188:
913 case RK3288:
914 return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
915 }
916
917 return false;
918 }
919
920 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
921 unsigned offset, int value);
922 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset);
923
924 /* set the pin config settings for a specified pin */
925 static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
926 unsigned long *configs, unsigned num_configs)
927 {
928 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
929 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
930 enum pin_config_param param;
931 u16 arg;
932 int i;
933 int rc;
934
935 for (i = 0; i < num_configs; i++) {
936 param = pinconf_to_config_param(configs[i]);
937 arg = pinconf_to_config_argument(configs[i]);
938
939 switch (param) {
940 case PIN_CONFIG_BIAS_DISABLE:
941 rc = rockchip_set_pull(bank, pin - bank->pin_base,
942 param);
943 if (rc)
944 return rc;
945 break;
946 case PIN_CONFIG_BIAS_PULL_UP:
947 case PIN_CONFIG_BIAS_PULL_DOWN:
948 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
949 case PIN_CONFIG_BIAS_BUS_HOLD:
950 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
951 return -ENOTSUPP;
952
953 if (!arg)
954 return -EINVAL;
955
956 rc = rockchip_set_pull(bank, pin - bank->pin_base,
957 param);
958 if (rc)
959 return rc;
960 break;
961 case PIN_CONFIG_OUTPUT:
962 rc = rockchip_gpio_direction_output(&bank->gpio_chip,
963 pin - bank->pin_base,
964 arg);
965 if (rc)
966 return rc;
967 break;
968 case PIN_CONFIG_DRIVE_STRENGTH:
969 /* rk3288 is the first with per-pin drive-strength */
970 if (info->ctrl->type != RK3288)
971 return -ENOTSUPP;
972
973 rc = rk3288_set_drive(bank, pin - bank->pin_base, arg);
974 if (rc < 0)
975 return rc;
976 break;
977 default:
978 return -ENOTSUPP;
979 break;
980 }
981 } /* for each config */
982
983 return 0;
984 }
985
986 /* get the pin config settings for a specified pin */
987 static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
988 unsigned long *config)
989 {
990 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
991 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
992 enum pin_config_param param = pinconf_to_config_param(*config);
993 u16 arg;
994 int rc;
995
996 switch (param) {
997 case PIN_CONFIG_BIAS_DISABLE:
998 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
999 return -EINVAL;
1000
1001 arg = 0;
1002 break;
1003 case PIN_CONFIG_BIAS_PULL_UP:
1004 case PIN_CONFIG_BIAS_PULL_DOWN:
1005 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
1006 case PIN_CONFIG_BIAS_BUS_HOLD:
1007 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
1008 return -ENOTSUPP;
1009
1010 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
1011 return -EINVAL;
1012
1013 arg = 1;
1014 break;
1015 case PIN_CONFIG_OUTPUT:
1016 rc = rockchip_get_mux(bank, pin - bank->pin_base);
1017 if (rc != RK_FUNC_GPIO)
1018 return -EINVAL;
1019
1020 rc = rockchip_gpio_get(&bank->gpio_chip, pin - bank->pin_base);
1021 if (rc < 0)
1022 return rc;
1023
1024 arg = rc ? 1 : 0;
1025 break;
1026 case PIN_CONFIG_DRIVE_STRENGTH:
1027 /* rk3288 is the first with per-pin drive-strength */
1028 if (info->ctrl->type != RK3288)
1029 return -ENOTSUPP;
1030
1031 rc = rk3288_get_drive(bank, pin - bank->pin_base);
1032 if (rc < 0)
1033 return rc;
1034
1035 arg = rc;
1036 break;
1037 default:
1038 return -ENOTSUPP;
1039 break;
1040 }
1041
1042 *config = pinconf_to_config_packed(param, arg);
1043
1044 return 0;
1045 }
1046
1047 static const struct pinconf_ops rockchip_pinconf_ops = {
1048 .pin_config_get = rockchip_pinconf_get,
1049 .pin_config_set = rockchip_pinconf_set,
1050 .is_generic = true,
1051 };
1052
1053 static const struct of_device_id rockchip_bank_match[] = {
1054 { .compatible = "rockchip,gpio-bank" },
1055 { .compatible = "rockchip,rk3188-gpio-bank0" },
1056 {},
1057 };
1058
1059 static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
1060 struct device_node *np)
1061 {
1062 struct device_node *child;
1063
1064 for_each_child_of_node(np, child) {
1065 if (of_match_node(rockchip_bank_match, child))
1066 continue;
1067
1068 info->nfunctions++;
1069 info->ngroups += of_get_child_count(child);
1070 }
1071 }
1072
1073 static int rockchip_pinctrl_parse_groups(struct device_node *np,
1074 struct rockchip_pin_group *grp,
1075 struct rockchip_pinctrl *info,
1076 u32 index)
1077 {
1078 struct rockchip_pin_bank *bank;
1079 int size;
1080 const __be32 *list;
1081 int num;
1082 int i, j;
1083 int ret;
1084
1085 dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
1086
1087 /* Initialise group */
1088 grp->name = np->name;
1089
1090 /*
1091 * the binding format is rockchip,pins = <bank pin mux CONFIG>,
1092 * do sanity check and calculate pins number
1093 */
1094 list = of_get_property(np, "rockchip,pins", &size);
1095 /* we do not check return since it's safe node passed down */
1096 size /= sizeof(*list);
1097 if (!size || size % 4) {
1098 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
1099 return -EINVAL;
1100 }
1101
1102 grp->npins = size / 4;
1103
1104 grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
1105 GFP_KERNEL);
1106 grp->data = devm_kzalloc(info->dev, grp->npins *
1107 sizeof(struct rockchip_pin_config),
1108 GFP_KERNEL);
1109 if (!grp->pins || !grp->data)
1110 return -ENOMEM;
1111
1112 for (i = 0, j = 0; i < size; i += 4, j++) {
1113 const __be32 *phandle;
1114 struct device_node *np_config;
1115
1116 num = be32_to_cpu(*list++);
1117 bank = bank_num_to_bank(info, num);
1118 if (IS_ERR(bank))
1119 return PTR_ERR(bank);
1120
1121 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
1122 grp->data[j].func = be32_to_cpu(*list++);
1123
1124 phandle = list++;
1125 if (!phandle)
1126 return -EINVAL;
1127
1128 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
1129 ret = pinconf_generic_parse_dt_config(np_config,
1130 &grp->data[j].configs, &grp->data[j].nconfigs);
1131 if (ret)
1132 return ret;
1133 }
1134
1135 return 0;
1136 }
1137
1138 static int rockchip_pinctrl_parse_functions(struct device_node *np,
1139 struct rockchip_pinctrl *info,
1140 u32 index)
1141 {
1142 struct device_node *child;
1143 struct rockchip_pmx_func *func;
1144 struct rockchip_pin_group *grp;
1145 int ret;
1146 static u32 grp_index;
1147 u32 i = 0;
1148
1149 dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
1150
1151 func = &info->functions[index];
1152
1153 /* Initialise function */
1154 func->name = np->name;
1155 func->ngroups = of_get_child_count(np);
1156 if (func->ngroups <= 0)
1157 return 0;
1158
1159 func->groups = devm_kzalloc(info->dev,
1160 func->ngroups * sizeof(char *), GFP_KERNEL);
1161 if (!func->groups)
1162 return -ENOMEM;
1163
1164 for_each_child_of_node(np, child) {
1165 func->groups[i] = child->name;
1166 grp = &info->groups[grp_index++];
1167 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
1168 if (ret)
1169 return ret;
1170 }
1171
1172 return 0;
1173 }
1174
1175 static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
1176 struct rockchip_pinctrl *info)
1177 {
1178 struct device *dev = &pdev->dev;
1179 struct device_node *np = dev->of_node;
1180 struct device_node *child;
1181 int ret;
1182 int i;
1183
1184 rockchip_pinctrl_child_count(info, np);
1185
1186 dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
1187 dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
1188
1189 info->functions = devm_kzalloc(dev, info->nfunctions *
1190 sizeof(struct rockchip_pmx_func),
1191 GFP_KERNEL);
1192 if (!info->functions) {
1193 dev_err(dev, "failed to allocate memory for function list\n");
1194 return -EINVAL;
1195 }
1196
1197 info->groups = devm_kzalloc(dev, info->ngroups *
1198 sizeof(struct rockchip_pin_group),
1199 GFP_KERNEL);
1200 if (!info->groups) {
1201 dev_err(dev, "failed allocate memory for ping group list\n");
1202 return -EINVAL;
1203 }
1204
1205 i = 0;
1206
1207 for_each_child_of_node(np, child) {
1208 if (of_match_node(rockchip_bank_match, child))
1209 continue;
1210
1211 ret = rockchip_pinctrl_parse_functions(child, info, i++);
1212 if (ret) {
1213 dev_err(&pdev->dev, "failed to parse function\n");
1214 return ret;
1215 }
1216 }
1217
1218 return 0;
1219 }
1220
1221 static int rockchip_pinctrl_register(struct platform_device *pdev,
1222 struct rockchip_pinctrl *info)
1223 {
1224 struct pinctrl_desc *ctrldesc = &info->pctl;
1225 struct pinctrl_pin_desc *pindesc, *pdesc;
1226 struct rockchip_pin_bank *pin_bank;
1227 int pin, bank, ret;
1228 int k;
1229
1230 ctrldesc->name = "rockchip-pinctrl";
1231 ctrldesc->owner = THIS_MODULE;
1232 ctrldesc->pctlops = &rockchip_pctrl_ops;
1233 ctrldesc->pmxops = &rockchip_pmx_ops;
1234 ctrldesc->confops = &rockchip_pinconf_ops;
1235
1236 pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
1237 info->ctrl->nr_pins, GFP_KERNEL);
1238 if (!pindesc) {
1239 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
1240 return -ENOMEM;
1241 }
1242 ctrldesc->pins = pindesc;
1243 ctrldesc->npins = info->ctrl->nr_pins;
1244
1245 pdesc = pindesc;
1246 for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
1247 pin_bank = &info->ctrl->pin_banks[bank];
1248 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
1249 pdesc->number = k;
1250 pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
1251 pin_bank->name, pin);
1252 pdesc++;
1253 }
1254 }
1255
1256 info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
1257 if (!info->pctl_dev) {
1258 dev_err(&pdev->dev, "could not register pinctrl driver\n");
1259 return -EINVAL;
1260 }
1261
1262 for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
1263 pin_bank = &info->ctrl->pin_banks[bank];
1264 pin_bank->grange.name = pin_bank->name;
1265 pin_bank->grange.id = bank;
1266 pin_bank->grange.pin_base = pin_bank->pin_base;
1267 pin_bank->grange.base = pin_bank->gpio_chip.base;
1268 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
1269 pin_bank->grange.gc = &pin_bank->gpio_chip;
1270 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
1271 }
1272
1273 ret = rockchip_pinctrl_parse_dt(pdev, info);
1274 if (ret) {
1275 pinctrl_unregister(info->pctl_dev);
1276 return ret;
1277 }
1278
1279 return 0;
1280 }
1281
1282 /*
1283 * GPIO handling
1284 */
1285
1286 static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
1287 {
1288 return pinctrl_request_gpio(chip->base + offset);
1289 }
1290
1291 static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
1292 {
1293 pinctrl_free_gpio(chip->base + offset);
1294 }
1295
1296 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
1297 {
1298 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1299 void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
1300 unsigned long flags;
1301 u32 data;
1302
1303 spin_lock_irqsave(&bank->slock, flags);
1304
1305 data = readl(reg);
1306 data &= ~BIT(offset);
1307 if (value)
1308 data |= BIT(offset);
1309 writel(data, reg);
1310
1311 spin_unlock_irqrestore(&bank->slock, flags);
1312 }
1313
1314 /*
1315 * Returns the level of the pin for input direction and setting of the DR
1316 * register for output gpios.
1317 */
1318 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
1319 {
1320 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1321 u32 data;
1322
1323 data = readl(bank->reg_base + GPIO_EXT_PORT);
1324 data >>= offset;
1325 data &= 1;
1326 return data;
1327 }
1328
1329 /*
1330 * gpiolib gpio_direction_input callback function. The setting of the pin
1331 * mux function as 'gpio input' will be handled by the pinctrl susbsystem
1332 * interface.
1333 */
1334 static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
1335 {
1336 return pinctrl_gpio_direction_input(gc->base + offset);
1337 }
1338
1339 /*
1340 * gpiolib gpio_direction_output callback function. The setting of the pin
1341 * mux function as 'gpio output' will be handled by the pinctrl susbsystem
1342 * interface.
1343 */
1344 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
1345 unsigned offset, int value)
1346 {
1347 rockchip_gpio_set(gc, offset, value);
1348 return pinctrl_gpio_direction_output(gc->base + offset);
1349 }
1350
1351 /*
1352 * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
1353 * and a virtual IRQ, if not already present.
1354 */
1355 static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
1356 {
1357 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1358 unsigned int virq;
1359
1360 if (!bank->domain)
1361 return -ENXIO;
1362
1363 virq = irq_create_mapping(bank->domain, offset);
1364
1365 return (virq) ? : -ENXIO;
1366 }
1367
1368 static const struct gpio_chip rockchip_gpiolib_chip = {
1369 .request = rockchip_gpio_request,
1370 .free = rockchip_gpio_free,
1371 .set = rockchip_gpio_set,
1372 .get = rockchip_gpio_get,
1373 .direction_input = rockchip_gpio_direction_input,
1374 .direction_output = rockchip_gpio_direction_output,
1375 .to_irq = rockchip_gpio_to_irq,
1376 .owner = THIS_MODULE,
1377 };
1378
1379 /*
1380 * Interrupt handling
1381 */
1382
1383 static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
1384 {
1385 struct irq_chip *chip = irq_get_chip(irq);
1386 struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
1387 u32 polarity = 0, data = 0;
1388 u32 pend;
1389 bool edge_changed = false;
1390
1391 dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
1392
1393 chained_irq_enter(chip, desc);
1394
1395 pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
1396
1397 if (bank->toggle_edge_mode) {
1398 polarity = readl_relaxed(bank->reg_base +
1399 GPIO_INT_POLARITY);
1400 data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
1401 }
1402
1403 while (pend) {
1404 unsigned int virq;
1405
1406 irq = __ffs(pend);
1407 pend &= ~BIT(irq);
1408 virq = irq_linear_revmap(bank->domain, irq);
1409
1410 if (!virq) {
1411 dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
1412 continue;
1413 }
1414
1415 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
1416
1417 /*
1418 * Triggering IRQ on both rising and falling edge
1419 * needs manual intervention.
1420 */
1421 if (bank->toggle_edge_mode & BIT(irq)) {
1422 if (data & BIT(irq))
1423 polarity &= ~BIT(irq);
1424 else
1425 polarity |= BIT(irq);
1426
1427 edge_changed = true;
1428 }
1429
1430 generic_handle_irq(virq);
1431 }
1432
1433 if (bank->toggle_edge_mode && edge_changed) {
1434 /* Interrupt params should only be set with ints disabled */
1435 data = readl_relaxed(bank->reg_base + GPIO_INTEN);
1436 writel_relaxed(0, bank->reg_base + GPIO_INTEN);
1437 writel(polarity, bank->reg_base + GPIO_INT_POLARITY);
1438 writel(data, bank->reg_base + GPIO_INTEN);
1439 }
1440
1441 chained_irq_exit(chip, desc);
1442 }
1443
1444 static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1445 {
1446 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1447 struct rockchip_pin_bank *bank = gc->private;
1448 u32 mask = BIT(d->hwirq);
1449 u32 polarity;
1450 u32 level;
1451 u32 data;
1452 int ret;
1453
1454 /* make sure the pin is configured as gpio input */
1455 ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1456 if (ret < 0)
1457 return ret;
1458
1459 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1460 data &= ~mask;
1461 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1462
1463 if (type & IRQ_TYPE_EDGE_BOTH)
1464 __irq_set_handler_locked(d->irq, handle_edge_irq);
1465 else
1466 __irq_set_handler_locked(d->irq, handle_level_irq);
1467
1468 irq_gc_lock(gc);
1469
1470 level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1471 polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1472
1473 switch (type) {
1474 case IRQ_TYPE_EDGE_BOTH:
1475 bank->toggle_edge_mode |= mask;
1476 level |= mask;
1477
1478 /*
1479 * Determine gpio state. If 1 next interrupt should be falling
1480 * otherwise rising.
1481 */
1482 data = readl(bank->reg_base + GPIO_EXT_PORT);
1483 if (data & mask)
1484 polarity &= ~mask;
1485 else
1486 polarity |= mask;
1487 break;
1488 case IRQ_TYPE_EDGE_RISING:
1489 bank->toggle_edge_mode &= ~mask;
1490 level |= mask;
1491 polarity |= mask;
1492 break;
1493 case IRQ_TYPE_EDGE_FALLING:
1494 bank->toggle_edge_mode &= ~mask;
1495 level |= mask;
1496 polarity &= ~mask;
1497 break;
1498 case IRQ_TYPE_LEVEL_HIGH:
1499 bank->toggle_edge_mode &= ~mask;
1500 level &= ~mask;
1501 polarity |= mask;
1502 break;
1503 case IRQ_TYPE_LEVEL_LOW:
1504 bank->toggle_edge_mode &= ~mask;
1505 level &= ~mask;
1506 polarity &= ~mask;
1507 break;
1508 default:
1509 irq_gc_unlock(gc);
1510 return -EINVAL;
1511 }
1512
1513 writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1514 writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1515
1516 irq_gc_unlock(gc);
1517
1518 return 0;
1519 }
1520
1521 static int rockchip_interrupts_register(struct platform_device *pdev,
1522 struct rockchip_pinctrl *info)
1523 {
1524 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1525 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1526 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1527 struct irq_chip_generic *gc;
1528 int ret;
1529 int i;
1530
1531 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1532 if (!bank->valid) {
1533 dev_warn(&pdev->dev, "bank %s is not valid\n",
1534 bank->name);
1535 continue;
1536 }
1537
1538 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1539 &irq_generic_chip_ops, NULL);
1540 if (!bank->domain) {
1541 dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1542 bank->name);
1543 continue;
1544 }
1545
1546 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1547 "rockchip_gpio_irq", handle_level_irq,
1548 clr, 0, IRQ_GC_INIT_MASK_CACHE);
1549 if (ret) {
1550 dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1551 bank->name);
1552 irq_domain_remove(bank->domain);
1553 continue;
1554 }
1555
1556 gc = irq_get_domain_generic_chip(bank->domain, 0);
1557 gc->reg_base = bank->reg_base;
1558 gc->private = bank;
1559 gc->chip_types[0].regs.mask = GPIO_INTEN;
1560 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1561 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1562 gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
1563 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
1564 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1565 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1566
1567 irq_set_handler_data(bank->irq, bank);
1568 irq_set_chained_handler(bank->irq, rockchip_irq_demux);
1569 }
1570
1571 return 0;
1572 }
1573
1574 static int rockchip_gpiolib_register(struct platform_device *pdev,
1575 struct rockchip_pinctrl *info)
1576 {
1577 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1578 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1579 struct gpio_chip *gc;
1580 int ret;
1581 int i;
1582
1583 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1584 if (!bank->valid) {
1585 dev_warn(&pdev->dev, "bank %s is not valid\n",
1586 bank->name);
1587 continue;
1588 }
1589
1590 bank->gpio_chip = rockchip_gpiolib_chip;
1591
1592 gc = &bank->gpio_chip;
1593 gc->base = bank->pin_base;
1594 gc->ngpio = bank->nr_pins;
1595 gc->dev = &pdev->dev;
1596 gc->of_node = bank->of_node;
1597 gc->label = bank->name;
1598
1599 ret = gpiochip_add(gc);
1600 if (ret) {
1601 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1602 gc->label, ret);
1603 goto fail;
1604 }
1605 }
1606
1607 rockchip_interrupts_register(pdev, info);
1608
1609 return 0;
1610
1611 fail:
1612 for (--i, --bank; i >= 0; --i, --bank) {
1613 if (!bank->valid)
1614 continue;
1615 gpiochip_remove(&bank->gpio_chip);
1616 }
1617 return ret;
1618 }
1619
1620 static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1621 struct rockchip_pinctrl *info)
1622 {
1623 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1624 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1625 int i;
1626
1627 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1628 if (!bank->valid)
1629 continue;
1630 gpiochip_remove(&bank->gpio_chip);
1631 }
1632
1633 return 0;
1634 }
1635
1636 static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1637 struct rockchip_pinctrl *info)
1638 {
1639 struct resource res;
1640 void __iomem *base;
1641
1642 if (of_address_to_resource(bank->of_node, 0, &res)) {
1643 dev_err(info->dev, "cannot find IO resource for bank\n");
1644 return -ENOENT;
1645 }
1646
1647 bank->reg_base = devm_ioremap_resource(info->dev, &res);
1648 if (IS_ERR(bank->reg_base))
1649 return PTR_ERR(bank->reg_base);
1650
1651 /*
1652 * special case, where parts of the pull setting-registers are
1653 * part of the PMU register space
1654 */
1655 if (of_device_is_compatible(bank->of_node,
1656 "rockchip,rk3188-gpio-bank0")) {
1657 struct device_node *node;
1658
1659 node = of_parse_phandle(bank->of_node->parent,
1660 "rockchip,pmu", 0);
1661 if (!node) {
1662 if (of_address_to_resource(bank->of_node, 1, &res)) {
1663 dev_err(info->dev, "cannot find IO resource for bank\n");
1664 return -ENOENT;
1665 }
1666
1667 base = devm_ioremap_resource(info->dev, &res);
1668 if (IS_ERR(base))
1669 return PTR_ERR(base);
1670 rockchip_regmap_config.max_register =
1671 resource_size(&res) - 4;
1672 rockchip_regmap_config.name =
1673 "rockchip,rk3188-gpio-bank0-pull";
1674 bank->regmap_pull = devm_regmap_init_mmio(info->dev,
1675 base,
1676 &rockchip_regmap_config);
1677 }
1678 }
1679
1680 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1681
1682 bank->clk = of_clk_get(bank->of_node, 0);
1683 if (IS_ERR(bank->clk))
1684 return PTR_ERR(bank->clk);
1685
1686 return clk_prepare_enable(bank->clk);
1687 }
1688
1689 static const struct of_device_id rockchip_pinctrl_dt_match[];
1690
1691 /* retrieve the soc specific data */
1692 static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1693 struct rockchip_pinctrl *d,
1694 struct platform_device *pdev)
1695 {
1696 const struct of_device_id *match;
1697 struct device_node *node = pdev->dev.of_node;
1698 struct device_node *np;
1699 struct rockchip_pin_ctrl *ctrl;
1700 struct rockchip_pin_bank *bank;
1701 int grf_offs, pmu_offs, i, j;
1702
1703 match = of_match_node(rockchip_pinctrl_dt_match, node);
1704 ctrl = (struct rockchip_pin_ctrl *)match->data;
1705
1706 for_each_child_of_node(node, np) {
1707 if (!of_find_property(np, "gpio-controller", NULL))
1708 continue;
1709
1710 bank = ctrl->pin_banks;
1711 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1712 if (!strcmp(bank->name, np->name)) {
1713 bank->of_node = np;
1714
1715 if (!rockchip_get_bank_data(bank, d))
1716 bank->valid = true;
1717
1718 break;
1719 }
1720 }
1721 }
1722
1723 grf_offs = ctrl->grf_mux_offset;
1724 pmu_offs = ctrl->pmu_mux_offset;
1725 bank = ctrl->pin_banks;
1726 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1727 int bank_pins = 0;
1728
1729 spin_lock_init(&bank->slock);
1730 bank->drvdata = d;
1731 bank->pin_base = ctrl->nr_pins;
1732 ctrl->nr_pins += bank->nr_pins;
1733
1734 /* calculate iomux offsets */
1735 for (j = 0; j < 4; j++) {
1736 struct rockchip_iomux *iom = &bank->iomux[j];
1737 int inc;
1738
1739 if (bank_pins >= bank->nr_pins)
1740 break;
1741
1742 /* preset offset value, set new start value */
1743 if (iom->offset >= 0) {
1744 if (iom->type & IOMUX_SOURCE_PMU)
1745 pmu_offs = iom->offset;
1746 else
1747 grf_offs = iom->offset;
1748 } else { /* set current offset */
1749 iom->offset = (iom->type & IOMUX_SOURCE_PMU) ?
1750 pmu_offs : grf_offs;
1751 }
1752
1753 dev_dbg(d->dev, "bank %d, iomux %d has offset 0x%x\n",
1754 i, j, iom->offset);
1755
1756 /*
1757 * Increase offset according to iomux width.
1758 * 4bit iomux'es are spread over two registers.
1759 */
1760 inc = (iom->type & IOMUX_WIDTH_4BIT) ? 8 : 4;
1761 if (iom->type & IOMUX_SOURCE_PMU)
1762 pmu_offs += inc;
1763 else
1764 grf_offs += inc;
1765
1766 bank_pins += 8;
1767 }
1768 }
1769
1770 return ctrl;
1771 }
1772
1773 static int rockchip_pinctrl_probe(struct platform_device *pdev)
1774 {
1775 struct rockchip_pinctrl *info;
1776 struct device *dev = &pdev->dev;
1777 struct rockchip_pin_ctrl *ctrl;
1778 struct device_node *np = pdev->dev.of_node, *node;
1779 struct resource *res;
1780 void __iomem *base;
1781 int ret;
1782
1783 if (!dev->of_node) {
1784 dev_err(dev, "device tree node not found\n");
1785 return -ENODEV;
1786 }
1787
1788 info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1789 if (!info)
1790 return -ENOMEM;
1791
1792 info->dev = dev;
1793
1794 ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
1795 if (!ctrl) {
1796 dev_err(dev, "driver data not available\n");
1797 return -EINVAL;
1798 }
1799 info->ctrl = ctrl;
1800
1801 node = of_parse_phandle(np, "rockchip,grf", 0);
1802 if (node) {
1803 info->regmap_base = syscon_node_to_regmap(node);
1804 if (IS_ERR(info->regmap_base))
1805 return PTR_ERR(info->regmap_base);
1806 } else {
1807 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1808 base = devm_ioremap_resource(&pdev->dev, res);
1809 if (IS_ERR(base))
1810 return PTR_ERR(base);
1811
1812 rockchip_regmap_config.max_register = resource_size(res) - 4;
1813 rockchip_regmap_config.name = "rockchip,pinctrl";
1814 info->regmap_base = devm_regmap_init_mmio(&pdev->dev, base,
1815 &rockchip_regmap_config);
1816
1817 /* to check for the old dt-bindings */
1818 info->reg_size = resource_size(res);
1819
1820 /* Honor the old binding, with pull registers as 2nd resource */
1821 if (ctrl->type == RK3188 && info->reg_size < 0x200) {
1822 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1823 base = devm_ioremap_resource(&pdev->dev, res);
1824 if (IS_ERR(base))
1825 return PTR_ERR(base);
1826
1827 rockchip_regmap_config.max_register =
1828 resource_size(res) - 4;
1829 rockchip_regmap_config.name = "rockchip,pinctrl-pull";
1830 info->regmap_pull = devm_regmap_init_mmio(&pdev->dev,
1831 base,
1832 &rockchip_regmap_config);
1833 }
1834 }
1835
1836 /* try to find the optional reference to the pmu syscon */
1837 node = of_parse_phandle(np, "rockchip,pmu", 0);
1838 if (node) {
1839 info->regmap_pmu = syscon_node_to_regmap(node);
1840 if (IS_ERR(info->regmap_pmu))
1841 return PTR_ERR(info->regmap_pmu);
1842 }
1843
1844 ret = rockchip_gpiolib_register(pdev, info);
1845 if (ret)
1846 return ret;
1847
1848 ret = rockchip_pinctrl_register(pdev, info);
1849 if (ret) {
1850 rockchip_gpiolib_unregister(pdev, info);
1851 return ret;
1852 }
1853
1854 platform_set_drvdata(pdev, info);
1855
1856 return 0;
1857 }
1858
1859 static struct rockchip_pin_bank rk2928_pin_banks[] = {
1860 PIN_BANK(0, 32, "gpio0"),
1861 PIN_BANK(1, 32, "gpio1"),
1862 PIN_BANK(2, 32, "gpio2"),
1863 PIN_BANK(3, 32, "gpio3"),
1864 };
1865
1866 static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
1867 .pin_banks = rk2928_pin_banks,
1868 .nr_banks = ARRAY_SIZE(rk2928_pin_banks),
1869 .label = "RK2928-GPIO",
1870 .type = RK2928,
1871 .grf_mux_offset = 0xa8,
1872 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
1873 };
1874
1875 static struct rockchip_pin_bank rk3066a_pin_banks[] = {
1876 PIN_BANK(0, 32, "gpio0"),
1877 PIN_BANK(1, 32, "gpio1"),
1878 PIN_BANK(2, 32, "gpio2"),
1879 PIN_BANK(3, 32, "gpio3"),
1880 PIN_BANK(4, 32, "gpio4"),
1881 PIN_BANK(6, 16, "gpio6"),
1882 };
1883
1884 static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
1885 .pin_banks = rk3066a_pin_banks,
1886 .nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
1887 .label = "RK3066a-GPIO",
1888 .type = RK2928,
1889 .grf_mux_offset = 0xa8,
1890 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
1891 };
1892
1893 static struct rockchip_pin_bank rk3066b_pin_banks[] = {
1894 PIN_BANK(0, 32, "gpio0"),
1895 PIN_BANK(1, 32, "gpio1"),
1896 PIN_BANK(2, 32, "gpio2"),
1897 PIN_BANK(3, 32, "gpio3"),
1898 };
1899
1900 static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
1901 .pin_banks = rk3066b_pin_banks,
1902 .nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
1903 .label = "RK3066b-GPIO",
1904 .type = RK3066B,
1905 .grf_mux_offset = 0x60,
1906 };
1907
1908 static struct rockchip_pin_bank rk3188_pin_banks[] = {
1909 PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_GPIO_ONLY, 0, 0, 0),
1910 PIN_BANK(1, 32, "gpio1"),
1911 PIN_BANK(2, 32, "gpio2"),
1912 PIN_BANK(3, 32, "gpio3"),
1913 };
1914
1915 static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
1916 .pin_banks = rk3188_pin_banks,
1917 .nr_banks = ARRAY_SIZE(rk3188_pin_banks),
1918 .label = "RK3188-GPIO",
1919 .type = RK3188,
1920 .grf_mux_offset = 0x60,
1921 .pull_calc_reg = rk3188_calc_pull_reg_and_bit,
1922 };
1923
1924 static struct rockchip_pin_bank rk3288_pin_banks[] = {
1925 PIN_BANK_IOMUX_FLAGS(0, 24, "gpio0", IOMUX_SOURCE_PMU,
1926 IOMUX_SOURCE_PMU,
1927 IOMUX_SOURCE_PMU,
1928 IOMUX_UNROUTED
1929 ),
1930 PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", IOMUX_UNROUTED,
1931 IOMUX_UNROUTED,
1932 IOMUX_UNROUTED,
1933 0
1934 ),
1935 PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, IOMUX_UNROUTED),
1936 PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, IOMUX_WIDTH_4BIT),
1937 PIN_BANK_IOMUX_FLAGS(4, 32, "gpio4", IOMUX_WIDTH_4BIT,
1938 IOMUX_WIDTH_4BIT,
1939 0,
1940 0
1941 ),
1942 PIN_BANK_IOMUX_FLAGS(5, 32, "gpio5", IOMUX_UNROUTED,
1943 0,
1944 0,
1945 IOMUX_UNROUTED
1946 ),
1947 PIN_BANK_IOMUX_FLAGS(6, 32, "gpio6", 0, 0, 0, IOMUX_UNROUTED),
1948 PIN_BANK_IOMUX_FLAGS(7, 32, "gpio7", 0,
1949 0,
1950 IOMUX_WIDTH_4BIT,
1951 IOMUX_UNROUTED
1952 ),
1953 PIN_BANK(8, 16, "gpio8"),
1954 };
1955
1956 static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
1957 .pin_banks = rk3288_pin_banks,
1958 .nr_banks = ARRAY_SIZE(rk3288_pin_banks),
1959 .label = "RK3288-GPIO",
1960 .type = RK3288,
1961 .grf_mux_offset = 0x0,
1962 .pmu_mux_offset = 0x84,
1963 .pull_calc_reg = rk3288_calc_pull_reg_and_bit,
1964 };
1965
1966 static const struct of_device_id rockchip_pinctrl_dt_match[] = {
1967 { .compatible = "rockchip,rk2928-pinctrl",
1968 .data = (void *)&rk2928_pin_ctrl },
1969 { .compatible = "rockchip,rk3066a-pinctrl",
1970 .data = (void *)&rk3066a_pin_ctrl },
1971 { .compatible = "rockchip,rk3066b-pinctrl",
1972 .data = (void *)&rk3066b_pin_ctrl },
1973 { .compatible = "rockchip,rk3188-pinctrl",
1974 .data = (void *)&rk3188_pin_ctrl },
1975 { .compatible = "rockchip,rk3288-pinctrl",
1976 .data = (void *)&rk3288_pin_ctrl },
1977 {},
1978 };
1979 MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
1980
1981 static struct platform_driver rockchip_pinctrl_driver = {
1982 .probe = rockchip_pinctrl_probe,
1983 .driver = {
1984 .name = "rockchip-pinctrl",
1985 .owner = THIS_MODULE,
1986 .of_match_table = rockchip_pinctrl_dt_match,
1987 },
1988 };
1989
1990 static int __init rockchip_pinctrl_drv_register(void)
1991 {
1992 return platform_driver_register(&rockchip_pinctrl_driver);
1993 }
1994 postcore_initcall(rockchip_pinctrl_drv_register);
1995
1996 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
1997 MODULE_DESCRIPTION("Rockchip pinctrl driver");
1998 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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