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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / pinctrl / pinctrl-rockchip.c
bloba0651128e23acc68fbe139dc10da3e859da2b9a1
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 RK3368,
67 };
68
69 /**
70 * Encode variants of iomux registers into a type variable
71 */
72 #define IOMUX_GPIO_ONLY BIT(0)
73 #define IOMUX_WIDTH_4BIT BIT(1)
74 #define IOMUX_SOURCE_PMU BIT(2)
75 #define IOMUX_UNROUTED BIT(3)
76
77 /**
78 * @type: iomux variant using IOMUX_* constants
79 * @offset: if initialized to -1 it will be autocalculated, by specifying
80 * an initial offset value the relevant source offset can be reset
81 * to a new value for autocalculating the following iomux registers.
82 */
83 struct rockchip_iomux {
84 int type;
85 int offset;
86 };
87
88 /**
89 * @reg_base: register base of the gpio bank
90 * @reg_pull: optional separate register for additional pull settings
91 * @clk: clock of the gpio bank
92 * @irq: interrupt of the gpio bank
93 * @saved_masks: Saved content of GPIO_INTEN at suspend time.
94 * @pin_base: first pin number
95 * @nr_pins: number of pins in this bank
96 * @name: name of the bank
97 * @bank_num: number of the bank, to account for holes
98 * @iomux: array describing the 4 iomux sources of the bank
99 * @valid: are all necessary informations present
100 * @of_node: dt node of this bank
101 * @drvdata: common pinctrl basedata
102 * @domain: irqdomain of the gpio bank
103 * @gpio_chip: gpiolib chip
104 * @grange: gpio range
105 * @slock: spinlock for the gpio bank
106 */
107 struct rockchip_pin_bank {
108 void __iomem *reg_base;
109 struct regmap *regmap_pull;
110 struct clk *clk;
111 int irq;
112 u32 saved_masks;
113 u32 pin_base;
114 u8 nr_pins;
115 char *name;
116 u8 bank_num;
117 struct rockchip_iomux iomux[4];
118 bool valid;
119 struct device_node *of_node;
120 struct rockchip_pinctrl *drvdata;
121 struct irq_domain *domain;
122 struct gpio_chip gpio_chip;
123 struct pinctrl_gpio_range grange;
124 spinlock_t slock;
125 u32 toggle_edge_mode;
126 };
127
128 #define PIN_BANK(id, pins, label) \
129 { \
130 .bank_num = id, \
131 .nr_pins = pins, \
132 .name = label, \
133 .iomux = { \
134 { .offset = -1 }, \
135 { .offset = -1 }, \
136 { .offset = -1 }, \
137 { .offset = -1 }, \
138 }, \
139 }
140
141 #define PIN_BANK_IOMUX_FLAGS(id, pins, label, iom0, iom1, iom2, iom3) \
142 { \
143 .bank_num = id, \
144 .nr_pins = pins, \
145 .name = label, \
146 .iomux = { \
147 { .type = iom0, .offset = -1 }, \
148 { .type = iom1, .offset = -1 }, \
149 { .type = iom2, .offset = -1 }, \
150 { .type = iom3, .offset = -1 }, \
151 }, \
152 }
153
154 /**
155 */
156 struct rockchip_pin_ctrl {
157 struct rockchip_pin_bank *pin_banks;
158 u32 nr_banks;
159 u32 nr_pins;
160 char *label;
161 enum rockchip_pinctrl_type type;
162 int grf_mux_offset;
163 int pmu_mux_offset;
164 void (*pull_calc_reg)(struct rockchip_pin_bank *bank,
165 int pin_num, struct regmap **regmap,
166 int *reg, u8 *bit);
167 void (*drv_calc_reg)(struct rockchip_pin_bank *bank,
168 int pin_num, struct regmap **regmap,
169 int *reg, u8 *bit);
170 };
171
172 struct rockchip_pin_config {
173 unsigned int func;
174 unsigned long *configs;
175 unsigned int nconfigs;
176 };
177
178 /**
179 * struct rockchip_pin_group: represent group of pins of a pinmux function.
180 * @name: name of the pin group, used to lookup the group.
181 * @pins: the pins included in this group.
182 * @npins: number of pins included in this group.
183 * @func: the mux function number to be programmed when selected.
184 * @configs: the config values to be set for each pin
185 * @nconfigs: number of configs for each pin
186 */
187 struct rockchip_pin_group {
188 const char *name;
189 unsigned int npins;
190 unsigned int *pins;
191 struct rockchip_pin_config *data;
192 };
193
194 /**
195 * struct rockchip_pmx_func: represent a pin function.
196 * @name: name of the pin function, used to lookup the function.
197 * @groups: one or more names of pin groups that provide this function.
198 * @num_groups: number of groups included in @groups.
199 */
200 struct rockchip_pmx_func {
201 const char *name;
202 const char **groups;
203 u8 ngroups;
204 };
205
206 struct rockchip_pinctrl {
207 struct regmap *regmap_base;
208 int reg_size;
209 struct regmap *regmap_pull;
210 struct regmap *regmap_pmu;
211 struct device *dev;
212 struct rockchip_pin_ctrl *ctrl;
213 struct pinctrl_desc pctl;
214 struct pinctrl_dev *pctl_dev;
215 struct rockchip_pin_group *groups;
216 unsigned int ngroups;
217 struct rockchip_pmx_func *functions;
218 unsigned int nfunctions;
219 };
220
221 static struct regmap_config rockchip_regmap_config = {
222 .reg_bits = 32,
223 .val_bits = 32,
224 .reg_stride = 4,
225 };
226
227 static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
228 {
229 return container_of(gc, struct rockchip_pin_bank, gpio_chip);
230 }
231
232 static const inline struct rockchip_pin_group *pinctrl_name_to_group(
233 const struct rockchip_pinctrl *info,
234 const char *name)
235 {
236 int i;
237
238 for (i = 0; i < info->ngroups; i++) {
239 if (!strcmp(info->groups[i].name, name))
240 return &info->groups[i];
241 }
242
243 return NULL;
244 }
245
246 /*
247 * given a pin number that is local to a pin controller, find out the pin bank
248 * and the register base of the pin bank.
249 */
250 static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
251 unsigned pin)
252 {
253 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
254
255 while (pin >= (b->pin_base + b->nr_pins))
256 b++;
257
258 return b;
259 }
260
261 static struct rockchip_pin_bank *bank_num_to_bank(
262 struct rockchip_pinctrl *info,
263 unsigned num)
264 {
265 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
266 int i;
267
268 for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
269 if (b->bank_num == num)
270 return b;
271 }
272
273 return ERR_PTR(-EINVAL);
274 }
275
276 /*
277 * Pinctrl_ops handling
278 */
279
280 static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
281 {
282 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
283
284 return info->ngroups;
285 }
286
287 static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
288 unsigned selector)
289 {
290 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
291
292 return info->groups[selector].name;
293 }
294
295 static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
296 unsigned selector, const unsigned **pins,
297 unsigned *npins)
298 {
299 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
300
301 if (selector >= info->ngroups)
302 return -EINVAL;
303
304 *pins = info->groups[selector].pins;
305 *npins = info->groups[selector].npins;
306
307 return 0;
308 }
309
310 static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
311 struct device_node *np,
312 struct pinctrl_map **map, unsigned *num_maps)
313 {
314 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
315 const struct rockchip_pin_group *grp;
316 struct pinctrl_map *new_map;
317 struct device_node *parent;
318 int map_num = 1;
319 int i;
320
321 /*
322 * first find the group of this node and check if we need to create
323 * config maps for pins
324 */
325 grp = pinctrl_name_to_group(info, np->name);
326 if (!grp) {
327 dev_err(info->dev, "unable to find group for node %s\n",
328 np->name);
329 return -EINVAL;
330 }
331
332 map_num += grp->npins;
333 new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
334 GFP_KERNEL);
335 if (!new_map)
336 return -ENOMEM;
337
338 *map = new_map;
339 *num_maps = map_num;
340
341 /* create mux map */
342 parent = of_get_parent(np);
343 if (!parent) {
344 devm_kfree(pctldev->dev, new_map);
345 return -EINVAL;
346 }
347 new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
348 new_map[0].data.mux.function = parent->name;
349 new_map[0].data.mux.group = np->name;
350 of_node_put(parent);
351
352 /* create config map */
353 new_map++;
354 for (i = 0; i < grp->npins; i++) {
355 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
356 new_map[i].data.configs.group_or_pin =
357 pin_get_name(pctldev, grp->pins[i]);
358 new_map[i].data.configs.configs = grp->data[i].configs;
359 new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
360 }
361
362 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
363 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
364
365 return 0;
366 }
367
368 static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
369 struct pinctrl_map *map, unsigned num_maps)
370 {
371 }
372
373 static const struct pinctrl_ops rockchip_pctrl_ops = {
374 .get_groups_count = rockchip_get_groups_count,
375 .get_group_name = rockchip_get_group_name,
376 .get_group_pins = rockchip_get_group_pins,
377 .dt_node_to_map = rockchip_dt_node_to_map,
378 .dt_free_map = rockchip_dt_free_map,
379 };
380
381 /*
382 * Hardware access
383 */
384
385 static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
386 {
387 struct rockchip_pinctrl *info = bank->drvdata;
388 int iomux_num = (pin / 8);
389 struct regmap *regmap;
390 unsigned int val;
391 int reg, ret, mask;
392 u8 bit;
393
394 if (iomux_num > 3)
395 return -EINVAL;
396
397 if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
398 dev_err(info->dev, "pin %d is unrouted\n", pin);
399 return -EINVAL;
400 }
401
402 if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY)
403 return RK_FUNC_GPIO;
404
405 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
406 ? info->regmap_pmu : info->regmap_base;
407
408 /* get basic quadrupel of mux registers and the correct reg inside */
409 mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
410 reg = bank->iomux[iomux_num].offset;
411 if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
412 if ((pin % 8) >= 4)
413 reg += 0x4;
414 bit = (pin % 4) * 4;
415 } else {
416 bit = (pin % 8) * 2;
417 }
418
419 ret = regmap_read(regmap, reg, &val);
420 if (ret)
421 return ret;
422
423 return ((val >> bit) & mask);
424 }
425
426 /*
427 * Set a new mux function for a pin.
428 *
429 * The register is divided into the upper and lower 16 bit. When changing
430 * a value, the previous register value is not read and changed. Instead
431 * it seems the changed bits are marked in the upper 16 bit, while the
432 * changed value gets set in the same offset in the lower 16 bit.
433 * All pin settings seem to be 2 bit wide in both the upper and lower
434 * parts.
435 * @bank: pin bank to change
436 * @pin: pin to change
437 * @mux: new mux function to set
438 */
439 static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
440 {
441 struct rockchip_pinctrl *info = bank->drvdata;
442 int iomux_num = (pin / 8);
443 struct regmap *regmap;
444 int reg, ret, mask;
445 unsigned long flags;
446 u8 bit;
447 u32 data, rmask;
448
449 if (iomux_num > 3)
450 return -EINVAL;
451
452 if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
453 dev_err(info->dev, "pin %d is unrouted\n", pin);
454 return -EINVAL;
455 }
456
457 if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {
458 if (mux != RK_FUNC_GPIO) {
459 dev_err(info->dev,
460 "pin %d only supports a gpio mux\n", pin);
461 return -ENOTSUPP;
462 } else {
463 return 0;
464 }
465 }
466
467 dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
468 bank->bank_num, pin, mux);
469
470 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
471 ? info->regmap_pmu : info->regmap_base;
472
473 /* get basic quadrupel of mux registers and the correct reg inside */
474 mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
475 reg = bank->iomux[iomux_num].offset;
476 if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
477 if ((pin % 8) >= 4)
478 reg += 0x4;
479 bit = (pin % 4) * 4;
480 } else {
481 bit = (pin % 8) * 2;
482 }
483
484 spin_lock_irqsave(&bank->slock, flags);
485
486 data = (mask << (bit + 16));
487 rmask = data | (data >> 16);
488 data |= (mux & mask) << bit;
489 ret = regmap_update_bits(regmap, reg, rmask, data);
490
491 spin_unlock_irqrestore(&bank->slock, flags);
492
493 return ret;
494 }
495
496 #define RK2928_PULL_OFFSET 0x118
497 #define RK2928_PULL_PINS_PER_REG 16
498 #define RK2928_PULL_BANK_STRIDE 8
499
500 static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
501 int pin_num, struct regmap **regmap,
502 int *reg, u8 *bit)
503 {
504 struct rockchip_pinctrl *info = bank->drvdata;
505
506 *regmap = info->regmap_base;
507 *reg = RK2928_PULL_OFFSET;
508 *reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
509 *reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
510
511 *bit = pin_num % RK2928_PULL_PINS_PER_REG;
512 };
513
514 #define RK3188_PULL_OFFSET 0x164
515 #define RK3188_PULL_BITS_PER_PIN 2
516 #define RK3188_PULL_PINS_PER_REG 8
517 #define RK3188_PULL_BANK_STRIDE 16
518 #define RK3188_PULL_PMU_OFFSET 0x64
519
520 static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
521 int pin_num, struct regmap **regmap,
522 int *reg, u8 *bit)
523 {
524 struct rockchip_pinctrl *info = bank->drvdata;
525
526 /* The first 12 pins of the first bank are located elsewhere */
527 if (bank->bank_num == 0 && pin_num < 12) {
528 *regmap = info->regmap_pmu ? info->regmap_pmu
529 : bank->regmap_pull;
530 *reg = info->regmap_pmu ? RK3188_PULL_PMU_OFFSET : 0;
531 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
532 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
533 *bit *= RK3188_PULL_BITS_PER_PIN;
534 } else {
535 *regmap = info->regmap_pull ? info->regmap_pull
536 : info->regmap_base;
537 *reg = info->regmap_pull ? 0 : RK3188_PULL_OFFSET;
538
539 /* correct the offset, as it is the 2nd pull register */
540 *reg -= 4;
541 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
542 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
543
544 /*
545 * The bits in these registers have an inverse ordering
546 * with the lowest pin being in bits 15:14 and the highest
547 * pin in bits 1:0
548 */
549 *bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
550 *bit *= RK3188_PULL_BITS_PER_PIN;
551 }
552 }
553
554 #define RK3288_PULL_OFFSET 0x140
555 static void rk3288_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
556 int pin_num, struct regmap **regmap,
557 int *reg, u8 *bit)
558 {
559 struct rockchip_pinctrl *info = bank->drvdata;
560
561 /* The first 24 pins of the first bank are located in PMU */
562 if (bank->bank_num == 0) {
563 *regmap = info->regmap_pmu;
564 *reg = RK3188_PULL_PMU_OFFSET;
565
566 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
567 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
568 *bit *= RK3188_PULL_BITS_PER_PIN;
569 } else {
570 *regmap = info->regmap_base;
571 *reg = RK3288_PULL_OFFSET;
572
573 /* correct the offset, as we're starting with the 2nd bank */
574 *reg -= 0x10;
575 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
576 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
577
578 *bit = (pin_num % RK3188_PULL_PINS_PER_REG);
579 *bit *= RK3188_PULL_BITS_PER_PIN;
580 }
581 }
582
583 #define RK3288_DRV_PMU_OFFSET 0x70
584 #define RK3288_DRV_GRF_OFFSET 0x1c0
585 #define RK3288_DRV_BITS_PER_PIN 2
586 #define RK3288_DRV_PINS_PER_REG 8
587 #define RK3288_DRV_BANK_STRIDE 16
588
589 static void rk3288_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
590 int pin_num, struct regmap **regmap,
591 int *reg, u8 *bit)
592 {
593 struct rockchip_pinctrl *info = bank->drvdata;
594
595 /* The first 24 pins of the first bank are located in PMU */
596 if (bank->bank_num == 0) {
597 *regmap = info->regmap_pmu;
598 *reg = RK3288_DRV_PMU_OFFSET;
599
600 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
601 *bit = pin_num % RK3288_DRV_PINS_PER_REG;
602 *bit *= RK3288_DRV_BITS_PER_PIN;
603 } else {
604 *regmap = info->regmap_base;
605 *reg = RK3288_DRV_GRF_OFFSET;
606
607 /* correct the offset, as we're starting with the 2nd bank */
608 *reg -= 0x10;
609 *reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
610 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
611
612 *bit = (pin_num % RK3288_DRV_PINS_PER_REG);
613 *bit *= RK3288_DRV_BITS_PER_PIN;
614 }
615 }
616
617 #define RK3368_PULL_GRF_OFFSET 0x100
618 #define RK3368_PULL_PMU_OFFSET 0x10
619
620 static void rk3368_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
621 int pin_num, struct regmap **regmap,
622 int *reg, u8 *bit)
623 {
624 struct rockchip_pinctrl *info = bank->drvdata;
625
626 /* The first 32 pins of the first bank are located in PMU */
627 if (bank->bank_num == 0) {
628 *regmap = info->regmap_pmu;
629 *reg = RK3368_PULL_PMU_OFFSET;
630
631 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
632 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
633 *bit *= RK3188_PULL_BITS_PER_PIN;
634 } else {
635 *regmap = info->regmap_base;
636 *reg = RK3368_PULL_GRF_OFFSET;
637
638 /* correct the offset, as we're starting with the 2nd bank */
639 *reg -= 0x10;
640 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
641 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
642
643 *bit = (pin_num % RK3188_PULL_PINS_PER_REG);
644 *bit *= RK3188_PULL_BITS_PER_PIN;
645 }
646 }
647
648 #define RK3368_DRV_PMU_OFFSET 0x20
649 #define RK3368_DRV_GRF_OFFSET 0x200
650
651 static void rk3368_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
652 int pin_num, struct regmap **regmap,
653 int *reg, u8 *bit)
654 {
655 struct rockchip_pinctrl *info = bank->drvdata;
656
657 /* The first 32 pins of the first bank are located in PMU */
658 if (bank->bank_num == 0) {
659 *regmap = info->regmap_pmu;
660 *reg = RK3368_DRV_PMU_OFFSET;
661
662 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
663 *bit = pin_num % RK3288_DRV_PINS_PER_REG;
664 *bit *= RK3288_DRV_BITS_PER_PIN;
665 } else {
666 *regmap = info->regmap_base;
667 *reg = RK3368_DRV_GRF_OFFSET;
668
669 /* correct the offset, as we're starting with the 2nd bank */
670 *reg -= 0x10;
671 *reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
672 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
673
674 *bit = (pin_num % RK3288_DRV_PINS_PER_REG);
675 *bit *= RK3288_DRV_BITS_PER_PIN;
676 }
677 }
678
679 static int rockchip_perpin_drv_list[] = { 2, 4, 8, 12 };
680
681 static int rockchip_get_drive_perpin(struct rockchip_pin_bank *bank,
682 int pin_num)
683 {
684 struct rockchip_pinctrl *info = bank->drvdata;
685 struct rockchip_pin_ctrl *ctrl = info->ctrl;
686 struct regmap *regmap;
687 int reg, ret;
688 u32 data;
689 u8 bit;
690
691 ctrl->drv_calc_reg(bank, pin_num, &regmap, &reg, &bit);
692
693 ret = regmap_read(regmap, reg, &data);
694 if (ret)
695 return ret;
696
697 data >>= bit;
698 data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1;
699
700 return rockchip_perpin_drv_list[data];
701 }
702
703 static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
704 int pin_num, int strength)
705 {
706 struct rockchip_pinctrl *info = bank->drvdata;
707 struct rockchip_pin_ctrl *ctrl = info->ctrl;
708 struct regmap *regmap;
709 unsigned long flags;
710 int reg, ret, i;
711 u32 data, rmask;
712 u8 bit;
713
714 ctrl->drv_calc_reg(bank, pin_num, &regmap, &reg, &bit);
715
716 ret = -EINVAL;
717 for (i = 0; i < ARRAY_SIZE(rockchip_perpin_drv_list); i++) {
718 if (rockchip_perpin_drv_list[i] == strength) {
719 ret = i;
720 break;
721 }
722 }
723
724 if (ret < 0) {
725 dev_err(info->dev, "unsupported driver strength %d\n",
726 strength);
727 return ret;
728 }
729
730 spin_lock_irqsave(&bank->slock, flags);
731
732 /* enable the write to the equivalent lower bits */
733 data = ((1 << RK3288_DRV_BITS_PER_PIN) - 1) << (bit + 16);
734 rmask = data | (data >> 16);
735 data |= (ret << bit);
736
737 ret = regmap_update_bits(regmap, reg, rmask, data);
738 spin_unlock_irqrestore(&bank->slock, flags);
739
740 return ret;
741 }
742
743 static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
744 {
745 struct rockchip_pinctrl *info = bank->drvdata;
746 struct rockchip_pin_ctrl *ctrl = info->ctrl;
747 struct regmap *regmap;
748 int reg, ret;
749 u8 bit;
750 u32 data;
751
752 /* rk3066b does support any pulls */
753 if (ctrl->type == RK3066B)
754 return PIN_CONFIG_BIAS_DISABLE;
755
756 ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
757
758 ret = regmap_read(regmap, reg, &data);
759 if (ret)
760 return ret;
761
762 switch (ctrl->type) {
763 case RK2928:
764 return !(data & BIT(bit))
765 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
766 : PIN_CONFIG_BIAS_DISABLE;
767 case RK3188:
768 case RK3288:
769 case RK3368:
770 data >>= bit;
771 data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
772
773 switch (data) {
774 case 0:
775 return PIN_CONFIG_BIAS_DISABLE;
776 case 1:
777 return PIN_CONFIG_BIAS_PULL_UP;
778 case 2:
779 return PIN_CONFIG_BIAS_PULL_DOWN;
780 case 3:
781 return PIN_CONFIG_BIAS_BUS_HOLD;
782 }
783
784 dev_err(info->dev, "unknown pull setting\n");
785 return -EIO;
786 default:
787 dev_err(info->dev, "unsupported pinctrl type\n");
788 return -EINVAL;
789 };
790 }
791
792 static int rockchip_set_pull(struct rockchip_pin_bank *bank,
793 int pin_num, int pull)
794 {
795 struct rockchip_pinctrl *info = bank->drvdata;
796 struct rockchip_pin_ctrl *ctrl = info->ctrl;
797 struct regmap *regmap;
798 int reg, ret;
799 unsigned long flags;
800 u8 bit;
801 u32 data, rmask;
802
803 dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
804 bank->bank_num, pin_num, pull);
805
806 /* rk3066b does support any pulls */
807 if (ctrl->type == RK3066B)
808 return pull ? -EINVAL : 0;
809
810 ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
811
812 switch (ctrl->type) {
813 case RK2928:
814 spin_lock_irqsave(&bank->slock, flags);
815
816 data = BIT(bit + 16);
817 if (pull == PIN_CONFIG_BIAS_DISABLE)
818 data |= BIT(bit);
819 ret = regmap_write(regmap, reg, data);
820
821 spin_unlock_irqrestore(&bank->slock, flags);
822 break;
823 case RK3188:
824 case RK3288:
825 case RK3368:
826 spin_lock_irqsave(&bank->slock, flags);
827
828 /* enable the write to the equivalent lower bits */
829 data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
830 rmask = data | (data >> 16);
831
832 switch (pull) {
833 case PIN_CONFIG_BIAS_DISABLE:
834 break;
835 case PIN_CONFIG_BIAS_PULL_UP:
836 data |= (1 << bit);
837 break;
838 case PIN_CONFIG_BIAS_PULL_DOWN:
839 data |= (2 << bit);
840 break;
841 case PIN_CONFIG_BIAS_BUS_HOLD:
842 data |= (3 << bit);
843 break;
844 default:
845 spin_unlock_irqrestore(&bank->slock, flags);
846 dev_err(info->dev, "unsupported pull setting %d\n",
847 pull);
848 return -EINVAL;
849 }
850
851 ret = regmap_update_bits(regmap, reg, rmask, data);
852
853 spin_unlock_irqrestore(&bank->slock, flags);
854 break;
855 default:
856 dev_err(info->dev, "unsupported pinctrl type\n");
857 return -EINVAL;
858 }
859
860 return ret;
861 }
862
863 /*
864 * Pinmux_ops handling
865 */
866
867 static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
868 {
869 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
870
871 return info->nfunctions;
872 }
873
874 static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
875 unsigned selector)
876 {
877 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
878
879 return info->functions[selector].name;
880 }
881
882 static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
883 unsigned selector, const char * const **groups,
884 unsigned * const num_groups)
885 {
886 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
887
888 *groups = info->functions[selector].groups;
889 *num_groups = info->functions[selector].ngroups;
890
891 return 0;
892 }
893
894 static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
895 unsigned group)
896 {
897 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
898 const unsigned int *pins = info->groups[group].pins;
899 const struct rockchip_pin_config *data = info->groups[group].data;
900 struct rockchip_pin_bank *bank;
901 int cnt, ret = 0;
902
903 dev_dbg(info->dev, "enable function %s group %s\n",
904 info->functions[selector].name, info->groups[group].name);
905
906 /*
907 * for each pin in the pin group selected, program the correspoding pin
908 * pin function number in the config register.
909 */
910 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
911 bank = pin_to_bank(info, pins[cnt]);
912 ret = rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
913 data[cnt].func);
914 if (ret)
915 break;
916 }
917
918 if (ret) {
919 /* revert the already done pin settings */
920 for (cnt--; cnt >= 0; cnt--)
921 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
922
923 return ret;
924 }
925
926 return 0;
927 }
928
929 /*
930 * The calls to gpio_direction_output() and gpio_direction_input()
931 * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
932 * function called from the gpiolib interface).
933 */
934 static int _rockchip_pmx_gpio_set_direction(struct gpio_chip *chip,
935 int pin, bool input)
936 {
937 struct rockchip_pin_bank *bank;
938 int ret;
939 unsigned long flags;
940 u32 data;
941
942 bank = gc_to_pin_bank(chip);
943
944 ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
945 if (ret < 0)
946 return ret;
947
948 clk_enable(bank->clk);
949 spin_lock_irqsave(&bank->slock, flags);
950
951 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
952 /* set bit to 1 for output, 0 for input */
953 if (!input)
954 data |= BIT(pin);
955 else
956 data &= ~BIT(pin);
957 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
958
959 spin_unlock_irqrestore(&bank->slock, flags);
960 clk_disable(bank->clk);
961
962 return 0;
963 }
964
965 static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
966 struct pinctrl_gpio_range *range,
967 unsigned offset, bool input)
968 {
969 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
970 struct gpio_chip *chip;
971 int pin;
972
973 chip = range->gc;
974 pin = offset - chip->base;
975 dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
976 offset, range->name, pin, input ? "input" : "output");
977
978 return _rockchip_pmx_gpio_set_direction(chip, offset - chip->base,
979 input);
980 }
981
982 static const struct pinmux_ops rockchip_pmx_ops = {
983 .get_functions_count = rockchip_pmx_get_funcs_count,
984 .get_function_name = rockchip_pmx_get_func_name,
985 .get_function_groups = rockchip_pmx_get_groups,
986 .set_mux = rockchip_pmx_set,
987 .gpio_set_direction = rockchip_pmx_gpio_set_direction,
988 };
989
990 /*
991 * Pinconf_ops handling
992 */
993
994 static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
995 enum pin_config_param pull)
996 {
997 switch (ctrl->type) {
998 case RK2928:
999 return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
1000 pull == PIN_CONFIG_BIAS_DISABLE);
1001 case RK3066B:
1002 return pull ? false : true;
1003 case RK3188:
1004 case RK3288:
1005 case RK3368:
1006 return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
1007 }
1008
1009 return false;
1010 }
1011
1012 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value);
1013 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset);
1014
1015 /* set the pin config settings for a specified pin */
1016 static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
1017 unsigned long *configs, unsigned num_configs)
1018 {
1019 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
1020 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
1021 enum pin_config_param param;
1022 u16 arg;
1023 int i;
1024 int rc;
1025
1026 for (i = 0; i < num_configs; i++) {
1027 param = pinconf_to_config_param(configs[i]);
1028 arg = pinconf_to_config_argument(configs[i]);
1029
1030 switch (param) {
1031 case PIN_CONFIG_BIAS_DISABLE:
1032 rc = rockchip_set_pull(bank, pin - bank->pin_base,
1033 param);
1034 if (rc)
1035 return rc;
1036 break;
1037 case PIN_CONFIG_BIAS_PULL_UP:
1038 case PIN_CONFIG_BIAS_PULL_DOWN:
1039 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
1040 case PIN_CONFIG_BIAS_BUS_HOLD:
1041 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
1042 return -ENOTSUPP;
1043
1044 if (!arg)
1045 return -EINVAL;
1046
1047 rc = rockchip_set_pull(bank, pin - bank->pin_base,
1048 param);
1049 if (rc)
1050 return rc;
1051 break;
1052 case PIN_CONFIG_OUTPUT:
1053 rockchip_gpio_set(&bank->gpio_chip,
1054 pin - bank->pin_base, arg);
1055 rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip,
1056 pin - bank->pin_base, false);
1057 if (rc)
1058 return rc;
1059 break;
1060 case PIN_CONFIG_DRIVE_STRENGTH:
1061 /* rk3288 is the first with per-pin drive-strength */
1062 if (!info->ctrl->drv_calc_reg)
1063 return -ENOTSUPP;
1064
1065 rc = rockchip_set_drive_perpin(bank,
1066 pin - bank->pin_base, arg);
1067 if (rc < 0)
1068 return rc;
1069 break;
1070 default:
1071 return -ENOTSUPP;
1072 break;
1073 }
1074 } /* for each config */
1075
1076 return 0;
1077 }
1078
1079 /* get the pin config settings for a specified pin */
1080 static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
1081 unsigned long *config)
1082 {
1083 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
1084 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
1085 enum pin_config_param param = pinconf_to_config_param(*config);
1086 u16 arg;
1087 int rc;
1088
1089 switch (param) {
1090 case PIN_CONFIG_BIAS_DISABLE:
1091 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
1092 return -EINVAL;
1093
1094 arg = 0;
1095 break;
1096 case PIN_CONFIG_BIAS_PULL_UP:
1097 case PIN_CONFIG_BIAS_PULL_DOWN:
1098 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
1099 case PIN_CONFIG_BIAS_BUS_HOLD:
1100 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
1101 return -ENOTSUPP;
1102
1103 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
1104 return -EINVAL;
1105
1106 arg = 1;
1107 break;
1108 case PIN_CONFIG_OUTPUT:
1109 rc = rockchip_get_mux(bank, pin - bank->pin_base);
1110 if (rc != RK_FUNC_GPIO)
1111 return -EINVAL;
1112
1113 rc = rockchip_gpio_get(&bank->gpio_chip, pin - bank->pin_base);
1114 if (rc < 0)
1115 return rc;
1116
1117 arg = rc ? 1 : 0;
1118 break;
1119 case PIN_CONFIG_DRIVE_STRENGTH:
1120 /* rk3288 is the first with per-pin drive-strength */
1121 if (!info->ctrl->drv_calc_reg)
1122 return -ENOTSUPP;
1123
1124 rc = rockchip_get_drive_perpin(bank, pin - bank->pin_base);
1125 if (rc < 0)
1126 return rc;
1127
1128 arg = rc;
1129 break;
1130 default:
1131 return -ENOTSUPP;
1132 break;
1133 }
1134
1135 *config = pinconf_to_config_packed(param, arg);
1136
1137 return 0;
1138 }
1139
1140 static const struct pinconf_ops rockchip_pinconf_ops = {
1141 .pin_config_get = rockchip_pinconf_get,
1142 .pin_config_set = rockchip_pinconf_set,
1143 .is_generic = true,
1144 };
1145
1146 static const struct of_device_id rockchip_bank_match[] = {
1147 { .compatible = "rockchip,gpio-bank" },
1148 { .compatible = "rockchip,rk3188-gpio-bank0" },
1149 {},
1150 };
1151
1152 static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
1153 struct device_node *np)
1154 {
1155 struct device_node *child;
1156
1157 for_each_child_of_node(np, child) {
1158 if (of_match_node(rockchip_bank_match, child))
1159 continue;
1160
1161 info->nfunctions++;
1162 info->ngroups += of_get_child_count(child);
1163 }
1164 }
1165
1166 static int rockchip_pinctrl_parse_groups(struct device_node *np,
1167 struct rockchip_pin_group *grp,
1168 struct rockchip_pinctrl *info,
1169 u32 index)
1170 {
1171 struct rockchip_pin_bank *bank;
1172 int size;
1173 const __be32 *list;
1174 int num;
1175 int i, j;
1176 int ret;
1177
1178 dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
1179
1180 /* Initialise group */
1181 grp->name = np->name;
1182
1183 /*
1184 * the binding format is rockchip,pins = <bank pin mux CONFIG>,
1185 * do sanity check and calculate pins number
1186 */
1187 list = of_get_property(np, "rockchip,pins", &size);
1188 /* we do not check return since it's safe node passed down */
1189 size /= sizeof(*list);
1190 if (!size || size % 4) {
1191 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
1192 return -EINVAL;
1193 }
1194
1195 grp->npins = size / 4;
1196
1197 grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
1198 GFP_KERNEL);
1199 grp->data = devm_kzalloc(info->dev, grp->npins *
1200 sizeof(struct rockchip_pin_config),
1201 GFP_KERNEL);
1202 if (!grp->pins || !grp->data)
1203 return -ENOMEM;
1204
1205 for (i = 0, j = 0; i < size; i += 4, j++) {
1206 const __be32 *phandle;
1207 struct device_node *np_config;
1208
1209 num = be32_to_cpu(*list++);
1210 bank = bank_num_to_bank(info, num);
1211 if (IS_ERR(bank))
1212 return PTR_ERR(bank);
1213
1214 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
1215 grp->data[j].func = be32_to_cpu(*list++);
1216
1217 phandle = list++;
1218 if (!phandle)
1219 return -EINVAL;
1220
1221 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
1222 ret = pinconf_generic_parse_dt_config(np_config, NULL,
1223 &grp->data[j].configs, &grp->data[j].nconfigs);
1224 if (ret)
1225 return ret;
1226 }
1227
1228 return 0;
1229 }
1230
1231 static int rockchip_pinctrl_parse_functions(struct device_node *np,
1232 struct rockchip_pinctrl *info,
1233 u32 index)
1234 {
1235 struct device_node *child;
1236 struct rockchip_pmx_func *func;
1237 struct rockchip_pin_group *grp;
1238 int ret;
1239 static u32 grp_index;
1240 u32 i = 0;
1241
1242 dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
1243
1244 func = &info->functions[index];
1245
1246 /* Initialise function */
1247 func->name = np->name;
1248 func->ngroups = of_get_child_count(np);
1249 if (func->ngroups <= 0)
1250 return 0;
1251
1252 func->groups = devm_kzalloc(info->dev,
1253 func->ngroups * sizeof(char *), GFP_KERNEL);
1254 if (!func->groups)
1255 return -ENOMEM;
1256
1257 for_each_child_of_node(np, child) {
1258 func->groups[i] = child->name;
1259 grp = &info->groups[grp_index++];
1260 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
1261 if (ret)
1262 return ret;
1263 }
1264
1265 return 0;
1266 }
1267
1268 static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
1269 struct rockchip_pinctrl *info)
1270 {
1271 struct device *dev = &pdev->dev;
1272 struct device_node *np = dev->of_node;
1273 struct device_node *child;
1274 int ret;
1275 int i;
1276
1277 rockchip_pinctrl_child_count(info, np);
1278
1279 dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
1280 dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
1281
1282 info->functions = devm_kzalloc(dev, info->nfunctions *
1283 sizeof(struct rockchip_pmx_func),
1284 GFP_KERNEL);
1285 if (!info->functions) {
1286 dev_err(dev, "failed to allocate memory for function list\n");
1287 return -EINVAL;
1288 }
1289
1290 info->groups = devm_kzalloc(dev, info->ngroups *
1291 sizeof(struct rockchip_pin_group),
1292 GFP_KERNEL);
1293 if (!info->groups) {
1294 dev_err(dev, "failed allocate memory for ping group list\n");
1295 return -EINVAL;
1296 }
1297
1298 i = 0;
1299
1300 for_each_child_of_node(np, child) {
1301 if (of_match_node(rockchip_bank_match, child))
1302 continue;
1303
1304 ret = rockchip_pinctrl_parse_functions(child, info, i++);
1305 if (ret) {
1306 dev_err(&pdev->dev, "failed to parse function\n");
1307 return ret;
1308 }
1309 }
1310
1311 return 0;
1312 }
1313
1314 static int rockchip_pinctrl_register(struct platform_device *pdev,
1315 struct rockchip_pinctrl *info)
1316 {
1317 struct pinctrl_desc *ctrldesc = &info->pctl;
1318 struct pinctrl_pin_desc *pindesc, *pdesc;
1319 struct rockchip_pin_bank *pin_bank;
1320 int pin, bank, ret;
1321 int k;
1322
1323 ctrldesc->name = "rockchip-pinctrl";
1324 ctrldesc->owner = THIS_MODULE;
1325 ctrldesc->pctlops = &rockchip_pctrl_ops;
1326 ctrldesc->pmxops = &rockchip_pmx_ops;
1327 ctrldesc->confops = &rockchip_pinconf_ops;
1328
1329 pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
1330 info->ctrl->nr_pins, GFP_KERNEL);
1331 if (!pindesc) {
1332 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
1333 return -ENOMEM;
1334 }
1335 ctrldesc->pins = pindesc;
1336 ctrldesc->npins = info->ctrl->nr_pins;
1337
1338 pdesc = pindesc;
1339 for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
1340 pin_bank = &info->ctrl->pin_banks[bank];
1341 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
1342 pdesc->number = k;
1343 pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
1344 pin_bank->name, pin);
1345 pdesc++;
1346 }
1347 }
1348
1349 ret = rockchip_pinctrl_parse_dt(pdev, info);
1350 if (ret)
1351 return ret;
1352
1353 info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
1354 if (IS_ERR(info->pctl_dev)) {
1355 dev_err(&pdev->dev, "could not register pinctrl driver\n");
1356 return PTR_ERR(info->pctl_dev);
1357 }
1358
1359 for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
1360 pin_bank = &info->ctrl->pin_banks[bank];
1361 pin_bank->grange.name = pin_bank->name;
1362 pin_bank->grange.id = bank;
1363 pin_bank->grange.pin_base = pin_bank->pin_base;
1364 pin_bank->grange.base = pin_bank->gpio_chip.base;
1365 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
1366 pin_bank->grange.gc = &pin_bank->gpio_chip;
1367 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
1368 }
1369
1370 return 0;
1371 }
1372
1373 /*
1374 * GPIO handling
1375 */
1376
1377 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
1378 {
1379 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1380 void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
1381 unsigned long flags;
1382 u32 data;
1383
1384 clk_enable(bank->clk);
1385 spin_lock_irqsave(&bank->slock, flags);
1386
1387 data = readl(reg);
1388 data &= ~BIT(offset);
1389 if (value)
1390 data |= BIT(offset);
1391 writel(data, reg);
1392
1393 spin_unlock_irqrestore(&bank->slock, flags);
1394 clk_disable(bank->clk);
1395 }
1396
1397 /*
1398 * Returns the level of the pin for input direction and setting of the DR
1399 * register for output gpios.
1400 */
1401 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
1402 {
1403 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1404 u32 data;
1405
1406 clk_enable(bank->clk);
1407 data = readl(bank->reg_base + GPIO_EXT_PORT);
1408 clk_disable(bank->clk);
1409 data >>= offset;
1410 data &= 1;
1411 return data;
1412 }
1413
1414 /*
1415 * gpiolib gpio_direction_input callback function. The setting of the pin
1416 * mux function as 'gpio input' will be handled by the pinctrl susbsystem
1417 * interface.
1418 */
1419 static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
1420 {
1421 return pinctrl_gpio_direction_input(gc->base + offset);
1422 }
1423
1424 /*
1425 * gpiolib gpio_direction_output callback function. The setting of the pin
1426 * mux function as 'gpio output' will be handled by the pinctrl susbsystem
1427 * interface.
1428 */
1429 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
1430 unsigned offset, int value)
1431 {
1432 rockchip_gpio_set(gc, offset, value);
1433 return pinctrl_gpio_direction_output(gc->base + offset);
1434 }
1435
1436 /*
1437 * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
1438 * and a virtual IRQ, if not already present.
1439 */
1440 static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
1441 {
1442 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1443 unsigned int virq;
1444
1445 if (!bank->domain)
1446 return -ENXIO;
1447
1448 virq = irq_create_mapping(bank->domain, offset);
1449
1450 return (virq) ? : -ENXIO;
1451 }
1452
1453 static const struct gpio_chip rockchip_gpiolib_chip = {
1454 .request = gpiochip_generic_request,
1455 .free = gpiochip_generic_free,
1456 .set = rockchip_gpio_set,
1457 .get = rockchip_gpio_get,
1458 .direction_input = rockchip_gpio_direction_input,
1459 .direction_output = rockchip_gpio_direction_output,
1460 .to_irq = rockchip_gpio_to_irq,
1461 .owner = THIS_MODULE,
1462 };
1463
1464 /*
1465 * Interrupt handling
1466 */
1467
1468 static void rockchip_irq_demux(struct irq_desc *desc)
1469 {
1470 struct irq_chip *chip = irq_desc_get_chip(desc);
1471 struct rockchip_pin_bank *bank = irq_desc_get_handler_data(desc);
1472 u32 pend;
1473
1474 dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
1475
1476 chained_irq_enter(chip, desc);
1477
1478 pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
1479
1480 while (pend) {
1481 unsigned int irq, virq;
1482
1483 irq = __ffs(pend);
1484 pend &= ~BIT(irq);
1485 virq = irq_linear_revmap(bank->domain, irq);
1486
1487 if (!virq) {
1488 dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
1489 continue;
1490 }
1491
1492 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
1493
1494 /*
1495 * Triggering IRQ on both rising and falling edge
1496 * needs manual intervention.
1497 */
1498 if (bank->toggle_edge_mode & BIT(irq)) {
1499 u32 data, data_old, polarity;
1500 unsigned long flags;
1501
1502 data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
1503 do {
1504 spin_lock_irqsave(&bank->slock, flags);
1505
1506 polarity = readl_relaxed(bank->reg_base +
1507 GPIO_INT_POLARITY);
1508 if (data & BIT(irq))
1509 polarity &= ~BIT(irq);
1510 else
1511 polarity |= BIT(irq);
1512 writel(polarity,
1513 bank->reg_base + GPIO_INT_POLARITY);
1514
1515 spin_unlock_irqrestore(&bank->slock, flags);
1516
1517 data_old = data;
1518 data = readl_relaxed(bank->reg_base +
1519 GPIO_EXT_PORT);
1520 } while ((data & BIT(irq)) != (data_old & BIT(irq)));
1521 }
1522
1523 generic_handle_irq(virq);
1524 }
1525
1526 chained_irq_exit(chip, desc);
1527 }
1528
1529 static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1530 {
1531 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1532 struct rockchip_pin_bank *bank = gc->private;
1533 u32 mask = BIT(d->hwirq);
1534 u32 polarity;
1535 u32 level;
1536 u32 data;
1537 unsigned long flags;
1538 int ret;
1539
1540 /* make sure the pin is configured as gpio input */
1541 ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1542 if (ret < 0)
1543 return ret;
1544
1545 clk_enable(bank->clk);
1546 spin_lock_irqsave(&bank->slock, flags);
1547
1548 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1549 data &= ~mask;
1550 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1551
1552 spin_unlock_irqrestore(&bank->slock, flags);
1553
1554 if (type & IRQ_TYPE_EDGE_BOTH)
1555 irq_set_handler_locked(d, handle_edge_irq);
1556 else
1557 irq_set_handler_locked(d, handle_level_irq);
1558
1559 spin_lock_irqsave(&bank->slock, flags);
1560 irq_gc_lock(gc);
1561
1562 level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1563 polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1564
1565 switch (type) {
1566 case IRQ_TYPE_EDGE_BOTH:
1567 bank->toggle_edge_mode |= mask;
1568 level |= mask;
1569
1570 /*
1571 * Determine gpio state. If 1 next interrupt should be falling
1572 * otherwise rising.
1573 */
1574 data = readl(bank->reg_base + GPIO_EXT_PORT);
1575 if (data & mask)
1576 polarity &= ~mask;
1577 else
1578 polarity |= mask;
1579 break;
1580 case IRQ_TYPE_EDGE_RISING:
1581 bank->toggle_edge_mode &= ~mask;
1582 level |= mask;
1583 polarity |= mask;
1584 break;
1585 case IRQ_TYPE_EDGE_FALLING:
1586 bank->toggle_edge_mode &= ~mask;
1587 level |= mask;
1588 polarity &= ~mask;
1589 break;
1590 case IRQ_TYPE_LEVEL_HIGH:
1591 bank->toggle_edge_mode &= ~mask;
1592 level &= ~mask;
1593 polarity |= mask;
1594 break;
1595 case IRQ_TYPE_LEVEL_LOW:
1596 bank->toggle_edge_mode &= ~mask;
1597 level &= ~mask;
1598 polarity &= ~mask;
1599 break;
1600 default:
1601 irq_gc_unlock(gc);
1602 spin_unlock_irqrestore(&bank->slock, flags);
1603 clk_disable(bank->clk);
1604 return -EINVAL;
1605 }
1606
1607 writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1608 writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1609
1610 irq_gc_unlock(gc);
1611 spin_unlock_irqrestore(&bank->slock, flags);
1612 clk_disable(bank->clk);
1613
1614 return 0;
1615 }
1616
1617 static void rockchip_irq_suspend(struct irq_data *d)
1618 {
1619 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1620 struct rockchip_pin_bank *bank = gc->private;
1621
1622 clk_enable(bank->clk);
1623 bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
1624 irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
1625 clk_disable(bank->clk);
1626 }
1627
1628 static void rockchip_irq_resume(struct irq_data *d)
1629 {
1630 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1631 struct rockchip_pin_bank *bank = gc->private;
1632
1633 clk_enable(bank->clk);
1634 irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
1635 clk_disable(bank->clk);
1636 }
1637
1638 static void rockchip_irq_gc_mask_clr_bit(struct irq_data *d)
1639 {
1640 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1641 struct rockchip_pin_bank *bank = gc->private;
1642
1643 clk_enable(bank->clk);
1644 irq_gc_mask_clr_bit(d);
1645 }
1646
1647 void rockchip_irq_gc_mask_set_bit(struct irq_data *d)
1648 {
1649 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1650 struct rockchip_pin_bank *bank = gc->private;
1651
1652 irq_gc_mask_set_bit(d);
1653 clk_disable(bank->clk);
1654 }
1655
1656 static int rockchip_interrupts_register(struct platform_device *pdev,
1657 struct rockchip_pinctrl *info)
1658 {
1659 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1660 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1661 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1662 struct irq_chip_generic *gc;
1663 int ret;
1664 int i, j;
1665
1666 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1667 if (!bank->valid) {
1668 dev_warn(&pdev->dev, "bank %s is not valid\n",
1669 bank->name);
1670 continue;
1671 }
1672
1673 ret = clk_enable(bank->clk);
1674 if (ret) {
1675 dev_err(&pdev->dev, "failed to enable clock for bank %s\n",
1676 bank->name);
1677 continue;
1678 }
1679
1680 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1681 &irq_generic_chip_ops, NULL);
1682 if (!bank->domain) {
1683 dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1684 bank->name);
1685 clk_disable(bank->clk);
1686 continue;
1687 }
1688
1689 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1690 "rockchip_gpio_irq", handle_level_irq,
1691 clr, 0, IRQ_GC_INIT_MASK_CACHE);
1692 if (ret) {
1693 dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1694 bank->name);
1695 irq_domain_remove(bank->domain);
1696 clk_disable(bank->clk);
1697 continue;
1698 }
1699
1700 /*
1701 * Linux assumes that all interrupts start out disabled/masked.
1702 * Our driver only uses the concept of masked and always keeps
1703 * things enabled, so for us that's all masked and all enabled.
1704 */
1705 writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
1706 writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
1707
1708 gc = irq_get_domain_generic_chip(bank->domain, 0);
1709 gc->reg_base = bank->reg_base;
1710 gc->private = bank;
1711 gc->chip_types[0].regs.mask = GPIO_INTMASK;
1712 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1713 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1714 gc->chip_types[0].chip.irq_mask = rockchip_irq_gc_mask_set_bit;
1715 gc->chip_types[0].chip.irq_unmask =
1716 rockchip_irq_gc_mask_clr_bit;
1717 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1718 gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
1719 gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
1720 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1721 gc->wake_enabled = IRQ_MSK(bank->nr_pins);
1722
1723 irq_set_chained_handler_and_data(bank->irq,
1724 rockchip_irq_demux, bank);
1725
1726 /* map the gpio irqs here, when the clock is still running */
1727 for (j = 0 ; j < 32 ; j++)
1728 irq_create_mapping(bank->domain, j);
1729
1730 clk_disable(bank->clk);
1731 }
1732
1733 return 0;
1734 }
1735
1736 static int rockchip_gpiolib_register(struct platform_device *pdev,
1737 struct rockchip_pinctrl *info)
1738 {
1739 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1740 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1741 struct gpio_chip *gc;
1742 int ret;
1743 int i;
1744
1745 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1746 if (!bank->valid) {
1747 dev_warn(&pdev->dev, "bank %s is not valid\n",
1748 bank->name);
1749 continue;
1750 }
1751
1752 bank->gpio_chip = rockchip_gpiolib_chip;
1753
1754 gc = &bank->gpio_chip;
1755 gc->base = bank->pin_base;
1756 gc->ngpio = bank->nr_pins;
1757 gc->dev = &pdev->dev;
1758 gc->of_node = bank->of_node;
1759 gc->label = bank->name;
1760
1761 ret = gpiochip_add(gc);
1762 if (ret) {
1763 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1764 gc->label, ret);
1765 goto fail;
1766 }
1767 }
1768
1769 rockchip_interrupts_register(pdev, info);
1770
1771 return 0;
1772
1773 fail:
1774 for (--i, --bank; i >= 0; --i, --bank) {
1775 if (!bank->valid)
1776 continue;
1777 gpiochip_remove(&bank->gpio_chip);
1778 }
1779 return ret;
1780 }
1781
1782 static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1783 struct rockchip_pinctrl *info)
1784 {
1785 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1786 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1787 int i;
1788
1789 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1790 if (!bank->valid)
1791 continue;
1792 gpiochip_remove(&bank->gpio_chip);
1793 }
1794
1795 return 0;
1796 }
1797
1798 static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1799 struct rockchip_pinctrl *info)
1800 {
1801 struct resource res;
1802 void __iomem *base;
1803
1804 if (of_address_to_resource(bank->of_node, 0, &res)) {
1805 dev_err(info->dev, "cannot find IO resource for bank\n");
1806 return -ENOENT;
1807 }
1808
1809 bank->reg_base = devm_ioremap_resource(info->dev, &res);
1810 if (IS_ERR(bank->reg_base))
1811 return PTR_ERR(bank->reg_base);
1812
1813 /*
1814 * special case, where parts of the pull setting-registers are
1815 * part of the PMU register space
1816 */
1817 if (of_device_is_compatible(bank->of_node,
1818 "rockchip,rk3188-gpio-bank0")) {
1819 struct device_node *node;
1820
1821 node = of_parse_phandle(bank->of_node->parent,
1822 "rockchip,pmu", 0);
1823 if (!node) {
1824 if (of_address_to_resource(bank->of_node, 1, &res)) {
1825 dev_err(info->dev, "cannot find IO resource for bank\n");
1826 return -ENOENT;
1827 }
1828
1829 base = devm_ioremap_resource(info->dev, &res);
1830 if (IS_ERR(base))
1831 return PTR_ERR(base);
1832 rockchip_regmap_config.max_register =
1833 resource_size(&res) - 4;
1834 rockchip_regmap_config.name =
1835 "rockchip,rk3188-gpio-bank0-pull";
1836 bank->regmap_pull = devm_regmap_init_mmio(info->dev,
1837 base,
1838 &rockchip_regmap_config);
1839 }
1840 }
1841
1842 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1843
1844 bank->clk = of_clk_get(bank->of_node, 0);
1845 if (IS_ERR(bank->clk))
1846 return PTR_ERR(bank->clk);
1847
1848 return clk_prepare(bank->clk);
1849 }
1850
1851 static const struct of_device_id rockchip_pinctrl_dt_match[];
1852
1853 /* retrieve the soc specific data */
1854 static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1855 struct rockchip_pinctrl *d,
1856 struct platform_device *pdev)
1857 {
1858 const struct of_device_id *match;
1859 struct device_node *node = pdev->dev.of_node;
1860 struct device_node *np;
1861 struct rockchip_pin_ctrl *ctrl;
1862 struct rockchip_pin_bank *bank;
1863 int grf_offs, pmu_offs, i, j;
1864
1865 match = of_match_node(rockchip_pinctrl_dt_match, node);
1866 ctrl = (struct rockchip_pin_ctrl *)match->data;
1867
1868 for_each_child_of_node(node, np) {
1869 if (!of_find_property(np, "gpio-controller", NULL))
1870 continue;
1871
1872 bank = ctrl->pin_banks;
1873 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1874 if (!strcmp(bank->name, np->name)) {
1875 bank->of_node = np;
1876
1877 if (!rockchip_get_bank_data(bank, d))
1878 bank->valid = true;
1879
1880 break;
1881 }
1882 }
1883 }
1884
1885 grf_offs = ctrl->grf_mux_offset;
1886 pmu_offs = ctrl->pmu_mux_offset;
1887 bank = ctrl->pin_banks;
1888 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1889 int bank_pins = 0;
1890
1891 spin_lock_init(&bank->slock);
1892 bank->drvdata = d;
1893 bank->pin_base = ctrl->nr_pins;
1894 ctrl->nr_pins += bank->nr_pins;
1895
1896 /* calculate iomux offsets */
1897 for (j = 0; j < 4; j++) {
1898 struct rockchip_iomux *iom = &bank->iomux[j];
1899 int inc;
1900
1901 if (bank_pins >= bank->nr_pins)
1902 break;
1903
1904 /* preset offset value, set new start value */
1905 if (iom->offset >= 0) {
1906 if (iom->type & IOMUX_SOURCE_PMU)
1907 pmu_offs = iom->offset;
1908 else
1909 grf_offs = iom->offset;
1910 } else { /* set current offset */
1911 iom->offset = (iom->type & IOMUX_SOURCE_PMU) ?
1912 pmu_offs : grf_offs;
1913 }
1914
1915 dev_dbg(d->dev, "bank %d, iomux %d has offset 0x%x\n",
1916 i, j, iom->offset);
1917
1918 /*
1919 * Increase offset according to iomux width.
1920 * 4bit iomux'es are spread over two registers.
1921 */
1922 inc = (iom->type & IOMUX_WIDTH_4BIT) ? 8 : 4;
1923 if (iom->type & IOMUX_SOURCE_PMU)
1924 pmu_offs += inc;
1925 else
1926 grf_offs += inc;
1927
1928 bank_pins += 8;
1929 }
1930 }
1931
1932 return ctrl;
1933 }
1934
1935 #define RK3288_GRF_GPIO6C_IOMUX 0x64
1936 #define GPIO6C6_SEL_WRITE_ENABLE BIT(28)
1937
1938 static u32 rk3288_grf_gpio6c_iomux;
1939
1940 static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
1941 {
1942 struct rockchip_pinctrl *info = dev_get_drvdata(dev);
1943 int ret = pinctrl_force_sleep(info->pctl_dev);
1944
1945 if (ret)
1946 return ret;
1947
1948 /*
1949 * RK3288 GPIO6_C6 mux would be modified by Maskrom when resume, so save
1950 * the setting here, and restore it at resume.
1951 */
1952 if (info->ctrl->type == RK3288) {
1953 ret = regmap_read(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
1954 &rk3288_grf_gpio6c_iomux);
1955 if (ret) {
1956 pinctrl_force_default(info->pctl_dev);
1957 return ret;
1958 }
1959 }
1960
1961 return 0;
1962 }
1963
1964 static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
1965 {
1966 struct rockchip_pinctrl *info = dev_get_drvdata(dev);
1967 int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
1968 rk3288_grf_gpio6c_iomux |
1969 GPIO6C6_SEL_WRITE_ENABLE);
1970
1971 if (ret)
1972 return ret;
1973
1974 return pinctrl_force_default(info->pctl_dev);
1975 }
1976
1977 static SIMPLE_DEV_PM_OPS(rockchip_pinctrl_dev_pm_ops, rockchip_pinctrl_suspend,
1978 rockchip_pinctrl_resume);
1979
1980 static int rockchip_pinctrl_probe(struct platform_device *pdev)
1981 {
1982 struct rockchip_pinctrl *info;
1983 struct device *dev = &pdev->dev;
1984 struct rockchip_pin_ctrl *ctrl;
1985 struct device_node *np = pdev->dev.of_node, *node;
1986 struct resource *res;
1987 void __iomem *base;
1988 int ret;
1989
1990 if (!dev->of_node) {
1991 dev_err(dev, "device tree node not found\n");
1992 return -ENODEV;
1993 }
1994
1995 info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1996 if (!info)
1997 return -ENOMEM;
1998
1999 info->dev = dev;
2000
2001 ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
2002 if (!ctrl) {
2003 dev_err(dev, "driver data not available\n");
2004 return -EINVAL;
2005 }
2006 info->ctrl = ctrl;
2007
2008 node = of_parse_phandle(np, "rockchip,grf", 0);
2009 if (node) {
2010 info->regmap_base = syscon_node_to_regmap(node);
2011 if (IS_ERR(info->regmap_base))
2012 return PTR_ERR(info->regmap_base);
2013 } else {
2014 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2015 base = devm_ioremap_resource(&pdev->dev, res);
2016 if (IS_ERR(base))
2017 return PTR_ERR(base);
2018
2019 rockchip_regmap_config.max_register = resource_size(res) - 4;
2020 rockchip_regmap_config.name = "rockchip,pinctrl";
2021 info->regmap_base = devm_regmap_init_mmio(&pdev->dev, base,
2022 &rockchip_regmap_config);
2023
2024 /* to check for the old dt-bindings */
2025 info->reg_size = resource_size(res);
2026
2027 /* Honor the old binding, with pull registers as 2nd resource */
2028 if (ctrl->type == RK3188 && info->reg_size < 0x200) {
2029 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2030 base = devm_ioremap_resource(&pdev->dev, res);
2031 if (IS_ERR(base))
2032 return PTR_ERR(base);
2033
2034 rockchip_regmap_config.max_register =
2035 resource_size(res) - 4;
2036 rockchip_regmap_config.name = "rockchip,pinctrl-pull";
2037 info->regmap_pull = devm_regmap_init_mmio(&pdev->dev,
2038 base,
2039 &rockchip_regmap_config);
2040 }
2041 }
2042
2043 /* try to find the optional reference to the pmu syscon */
2044 node = of_parse_phandle(np, "rockchip,pmu", 0);
2045 if (node) {
2046 info->regmap_pmu = syscon_node_to_regmap(node);
2047 if (IS_ERR(info->regmap_pmu))
2048 return PTR_ERR(info->regmap_pmu);
2049 }
2050
2051 ret = rockchip_gpiolib_register(pdev, info);
2052 if (ret)
2053 return ret;
2054
2055 ret = rockchip_pinctrl_register(pdev, info);
2056 if (ret) {
2057 rockchip_gpiolib_unregister(pdev, info);
2058 return ret;
2059 }
2060
2061 platform_set_drvdata(pdev, info);
2062
2063 return 0;
2064 }
2065
2066 static struct rockchip_pin_bank rk2928_pin_banks[] = {
2067 PIN_BANK(0, 32, "gpio0"),
2068 PIN_BANK(1, 32, "gpio1"),
2069 PIN_BANK(2, 32, "gpio2"),
2070 PIN_BANK(3, 32, "gpio3"),
2071 };
2072
2073 static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
2074 .pin_banks = rk2928_pin_banks,
2075 .nr_banks = ARRAY_SIZE(rk2928_pin_banks),
2076 .label = "RK2928-GPIO",
2077 .type = RK2928,
2078 .grf_mux_offset = 0xa8,
2079 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
2080 };
2081
2082 static struct rockchip_pin_bank rk3036_pin_banks[] = {
2083 PIN_BANK(0, 32, "gpio0"),
2084 PIN_BANK(1, 32, "gpio1"),
2085 PIN_BANK(2, 32, "gpio2"),
2086 };
2087
2088 static struct rockchip_pin_ctrl rk3036_pin_ctrl = {
2089 .pin_banks = rk3036_pin_banks,
2090 .nr_banks = ARRAY_SIZE(rk3036_pin_banks),
2091 .label = "RK3036-GPIO",
2092 .type = RK2928,
2093 .grf_mux_offset = 0xa8,
2094 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
2095 };
2096
2097 static struct rockchip_pin_bank rk3066a_pin_banks[] = {
2098 PIN_BANK(0, 32, "gpio0"),
2099 PIN_BANK(1, 32, "gpio1"),
2100 PIN_BANK(2, 32, "gpio2"),
2101 PIN_BANK(3, 32, "gpio3"),
2102 PIN_BANK(4, 32, "gpio4"),
2103 PIN_BANK(6, 16, "gpio6"),
2104 };
2105
2106 static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
2107 .pin_banks = rk3066a_pin_banks,
2108 .nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
2109 .label = "RK3066a-GPIO",
2110 .type = RK2928,
2111 .grf_mux_offset = 0xa8,
2112 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
2113 };
2114
2115 static struct rockchip_pin_bank rk3066b_pin_banks[] = {
2116 PIN_BANK(0, 32, "gpio0"),
2117 PIN_BANK(1, 32, "gpio1"),
2118 PIN_BANK(2, 32, "gpio2"),
2119 PIN_BANK(3, 32, "gpio3"),
2120 };
2121
2122 static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
2123 .pin_banks = rk3066b_pin_banks,
2124 .nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
2125 .label = "RK3066b-GPIO",
2126 .type = RK3066B,
2127 .grf_mux_offset = 0x60,
2128 };
2129
2130 static struct rockchip_pin_bank rk3188_pin_banks[] = {
2131 PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_GPIO_ONLY, 0, 0, 0),
2132 PIN_BANK(1, 32, "gpio1"),
2133 PIN_BANK(2, 32, "gpio2"),
2134 PIN_BANK(3, 32, "gpio3"),
2135 };
2136
2137 static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
2138 .pin_banks = rk3188_pin_banks,
2139 .nr_banks = ARRAY_SIZE(rk3188_pin_banks),
2140 .label = "RK3188-GPIO",
2141 .type = RK3188,
2142 .grf_mux_offset = 0x60,
2143 .pull_calc_reg = rk3188_calc_pull_reg_and_bit,
2144 };
2145
2146 static struct rockchip_pin_bank rk3288_pin_banks[] = {
2147 PIN_BANK_IOMUX_FLAGS(0, 24, "gpio0", IOMUX_SOURCE_PMU,
2148 IOMUX_SOURCE_PMU,
2149 IOMUX_SOURCE_PMU,
2150 IOMUX_UNROUTED
2151 ),
2152 PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", IOMUX_UNROUTED,
2153 IOMUX_UNROUTED,
2154 IOMUX_UNROUTED,
2155 0
2156 ),
2157 PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, IOMUX_UNROUTED),
2158 PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, IOMUX_WIDTH_4BIT),
2159 PIN_BANK_IOMUX_FLAGS(4, 32, "gpio4", IOMUX_WIDTH_4BIT,
2160 IOMUX_WIDTH_4BIT,
2161 0,
2162 0
2163 ),
2164 PIN_BANK_IOMUX_FLAGS(5, 32, "gpio5", IOMUX_UNROUTED,
2165 0,
2166 0,
2167 IOMUX_UNROUTED
2168 ),
2169 PIN_BANK_IOMUX_FLAGS(6, 32, "gpio6", 0, 0, 0, IOMUX_UNROUTED),
2170 PIN_BANK_IOMUX_FLAGS(7, 32, "gpio7", 0,
2171 0,
2172 IOMUX_WIDTH_4BIT,
2173 IOMUX_UNROUTED
2174 ),
2175 PIN_BANK(8, 16, "gpio8"),
2176 };
2177
2178 static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
2179 .pin_banks = rk3288_pin_banks,
2180 .nr_banks = ARRAY_SIZE(rk3288_pin_banks),
2181 .label = "RK3288-GPIO",
2182 .type = RK3288,
2183 .grf_mux_offset = 0x0,
2184 .pmu_mux_offset = 0x84,
2185 .pull_calc_reg = rk3288_calc_pull_reg_and_bit,
2186 .drv_calc_reg = rk3288_calc_drv_reg_and_bit,
2187 };
2188
2189 static struct rockchip_pin_bank rk3368_pin_banks[] = {
2190 PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU,
2191 IOMUX_SOURCE_PMU,
2192 IOMUX_SOURCE_PMU,
2193 IOMUX_SOURCE_PMU
2194 ),
2195 PIN_BANK(1, 32, "gpio1"),
2196 PIN_BANK(2, 32, "gpio2"),
2197 PIN_BANK(3, 32, "gpio3"),
2198 };
2199
2200 static struct rockchip_pin_ctrl rk3368_pin_ctrl = {
2201 .pin_banks = rk3368_pin_banks,
2202 .nr_banks = ARRAY_SIZE(rk3368_pin_banks),
2203 .label = "RK3368-GPIO",
2204 .type = RK3368,
2205 .grf_mux_offset = 0x0,
2206 .pmu_mux_offset = 0x0,
2207 .pull_calc_reg = rk3368_calc_pull_reg_and_bit,
2208 .drv_calc_reg = rk3368_calc_drv_reg_and_bit,
2209 };
2210
2211
2212 static const struct of_device_id rockchip_pinctrl_dt_match[] = {
2213 { .compatible = "rockchip,rk2928-pinctrl",
2214 .data = (void *)&rk2928_pin_ctrl },
2215 { .compatible = "rockchip,rk3036-pinctrl",
2216 .data = (void *)&rk3036_pin_ctrl },
2217 { .compatible = "rockchip,rk3066a-pinctrl",
2218 .data = (void *)&rk3066a_pin_ctrl },
2219 { .compatible = "rockchip,rk3066b-pinctrl",
2220 .data = (void *)&rk3066b_pin_ctrl },
2221 { .compatible = "rockchip,rk3188-pinctrl",
2222 .data = (void *)&rk3188_pin_ctrl },
2223 { .compatible = "rockchip,rk3288-pinctrl",
2224 .data = (void *)&rk3288_pin_ctrl },
2225 { .compatible = "rockchip,rk3368-pinctrl",
2226 .data = (void *)&rk3368_pin_ctrl },
2227 {},
2228 };
2229 MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
2230
2231 static struct platform_driver rockchip_pinctrl_driver = {
2232 .probe = rockchip_pinctrl_probe,
2233 .driver = {
2234 .name = "rockchip-pinctrl",
2235 .pm = &rockchip_pinctrl_dev_pm_ops,
2236 .of_match_table = rockchip_pinctrl_dt_match,
2237 },
2238 };
2239
2240 static int __init rockchip_pinctrl_drv_register(void)
2241 {
2242 return platform_driver_register(&rockchip_pinctrl_driver);
2243 }
2244 postcore_initcall(rockchip_pinctrl_drv_register);
2245
2246 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
2247 MODULE_DESCRIPTION("Rockchip pinctrl driver");
2248 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support