2 * Pinctrl driver for Rockchip SoCs
4 * Copyright (c) 2013 MundoReader S.L.
5 * Author: Heiko Stuebner <heiko@sntech.de>
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
14 * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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.
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.
26 #include <linux/module.h>
27 #include <linux/platform_device.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>
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
61 enum rockchip_pinctrl_type {
70 * Encode variants of iomux registers into a type variable
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)
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.
83 struct rockchip_iomux {
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
107 struct rockchip_pin_bank {
108 void __iomem *reg_base;
109 struct regmap *regmap_pull;
117 struct rockchip_iomux iomux[4];
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;
125 u32 toggle_edge_mode;
128 #define PIN_BANK(id, pins, label) \
141 #define PIN_BANK_IOMUX_FLAGS(id, pins, label, iom0, iom1, iom2, iom3) \
147 { .type = iom0, .offset = -1 }, \
148 { .type = iom1, .offset = -1 }, \
149 { .type = iom2, .offset = -1 }, \
150 { .type = iom3, .offset = -1 }, \
156 struct rockchip_pin_ctrl {
157 struct rockchip_pin_bank *pin_banks;
161 enum rockchip_pinctrl_type type;
164 void (*pull_calc_reg)(struct rockchip_pin_bank *bank,
165 int pin_num, struct regmap **regmap,
167 void (*drv_calc_reg)(struct rockchip_pin_bank *bank,
168 int pin_num, struct regmap **regmap,
172 struct rockchip_pin_config {
174 unsigned long *configs;
175 unsigned int nconfigs;
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
187 struct rockchip_pin_group {
191 struct rockchip_pin_config *data;
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.
200 struct rockchip_pmx_func {
206 struct rockchip_pinctrl {
207 struct regmap *regmap_base;
209 struct regmap *regmap_pull;
210 struct regmap *regmap_pmu;
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;
221 static struct regmap_config rockchip_regmap_config = {
227 static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
229 return container_of(gc, struct rockchip_pin_bank, gpio_chip);
232 static const inline struct rockchip_pin_group *pinctrl_name_to_group(
233 const struct rockchip_pinctrl *info,
238 for (i = 0; i < info->ngroups; i++) {
239 if (!strcmp(info->groups[i].name, name))
240 return &info->groups[i];
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.
250 static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
253 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
255 while (pin >= (b->pin_base + b->nr_pins))
261 static struct rockchip_pin_bank *bank_num_to_bank(
262 struct rockchip_pinctrl *info,
265 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
268 for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
269 if (b->bank_num == num)
273 return ERR_PTR(-EINVAL);
277 * Pinctrl_ops handling
280 static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
282 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
284 return info->ngroups;
287 static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
290 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
292 return info->groups[selector].name;
295 static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
296 unsigned selector, const unsigned **pins,
299 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
301 if (selector >= info->ngroups)
304 *pins = info->groups[selector].pins;
305 *npins = info->groups[selector].npins;
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)
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;
322 * first find the group of this node and check if we need to create
323 * config maps for pins
325 grp = pinctrl_name_to_group(info, np->name);
327 dev_err(info->dev, "unable to find group for node %s\n",
332 map_num += grp->npins;
333 new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
342 parent = of_get_parent(np);
344 devm_kfree(pctldev->dev, new_map);
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;
352 /* create config 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;
362 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
363 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
368 static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
369 struct pinctrl_map *map, unsigned num_maps)
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,
385 static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
387 struct rockchip_pinctrl *info = bank->drvdata;
388 int iomux_num = (pin / 8);
389 struct regmap *regmap;
397 if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
398 dev_err(info->dev, "pin %d is unrouted\n", pin);
402 if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY)
405 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
406 ? info->regmap_pmu : info->regmap_base;
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) {
419 ret = regmap_read(regmap, reg, &val);
423 return ((val >> bit) & mask);
427 * Set a new mux function for a pin.
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
435 * @bank: pin bank to change
436 * @pin: pin to change
437 * @mux: new mux function to set
439 static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
441 struct rockchip_pinctrl *info = bank->drvdata;
442 int iomux_num = (pin / 8);
443 struct regmap *regmap;
452 if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
453 dev_err(info->dev, "pin %d is unrouted\n", pin);
457 if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {
458 if (mux != RK_FUNC_GPIO) {
460 "pin %d only supports a gpio mux\n", pin);
467 dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
468 bank->bank_num, pin, mux);
470 regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
471 ? info->regmap_pmu : info->regmap_base;
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) {
484 spin_lock_irqsave(&bank->slock, flags);
486 data = (mask << (bit + 16));
487 rmask = data | (data >> 16);
488 data |= (mux & mask) << bit;
489 ret = regmap_update_bits(regmap, reg, rmask, data);
491 spin_unlock_irqrestore(&bank->slock, flags);
496 #define RK2928_PULL_OFFSET 0x118
497 #define RK2928_PULL_PINS_PER_REG 16
498 #define RK2928_PULL_BANK_STRIDE 8
500 static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
501 int pin_num, struct regmap **regmap,
504 struct rockchip_pinctrl *info = bank->drvdata;
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;
511 *bit = pin_num % RK2928_PULL_PINS_PER_REG;
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
520 static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
521 int pin_num, struct regmap **regmap,
524 struct rockchip_pinctrl *info = bank->drvdata;
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
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;
535 *regmap = info->regmap_pull ? info->regmap_pull
537 *reg = info->regmap_pull ? 0 : RK3188_PULL_OFFSET;
539 /* correct the offset, as it is the 2nd pull register */
541 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
542 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
545 * The bits in these registers have an inverse ordering
546 * with the lowest pin being in bits 15:14 and the highest
549 *bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
550 *bit *= RK3188_PULL_BITS_PER_PIN;
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,
559 struct rockchip_pinctrl *info = bank->drvdata;
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;
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;
570 *regmap = info->regmap_base;
571 *reg = RK3288_PULL_OFFSET;
573 /* correct the offset, as we're starting with the 2nd bank */
575 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
576 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
578 *bit = (pin_num % RK3188_PULL_PINS_PER_REG);
579 *bit *= RK3188_PULL_BITS_PER_PIN;
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
589 static void rk3288_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
590 int pin_num, struct regmap **regmap,
593 struct rockchip_pinctrl *info = bank->drvdata;
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;
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;
604 *regmap = info->regmap_base;
605 *reg = RK3288_DRV_GRF_OFFSET;
607 /* correct the offset, as we're starting with the 2nd bank */
609 *reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
610 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
612 *bit = (pin_num % RK3288_DRV_PINS_PER_REG);
613 *bit *= RK3288_DRV_BITS_PER_PIN;
617 #define RK3368_PULL_GRF_OFFSET 0x100
618 #define RK3368_PULL_PMU_OFFSET 0x10
620 static void rk3368_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
621 int pin_num, struct regmap **regmap,
624 struct rockchip_pinctrl *info = bank->drvdata;
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;
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;
635 *regmap = info->regmap_base;
636 *reg = RK3368_PULL_GRF_OFFSET;
638 /* correct the offset, as we're starting with the 2nd bank */
640 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
641 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
643 *bit = (pin_num % RK3188_PULL_PINS_PER_REG);
644 *bit *= RK3188_PULL_BITS_PER_PIN;
648 #define RK3368_DRV_PMU_OFFSET 0x20
649 #define RK3368_DRV_GRF_OFFSET 0x200
651 static void rk3368_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
652 int pin_num, struct regmap **regmap,
655 struct rockchip_pinctrl *info = bank->drvdata;
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;
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;
666 *regmap = info->regmap_base;
667 *reg = RK3368_DRV_GRF_OFFSET;
669 /* correct the offset, as we're starting with the 2nd bank */
671 *reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
672 *reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
674 *bit = (pin_num % RK3288_DRV_PINS_PER_REG);
675 *bit *= RK3288_DRV_BITS_PER_PIN;
679 static int rockchip_perpin_drv_list[] = { 2, 4, 8, 12 };
681 static int rockchip_get_drive_perpin(struct rockchip_pin_bank *bank,
684 struct rockchip_pinctrl *info = bank->drvdata;
685 struct rockchip_pin_ctrl *ctrl = info->ctrl;
686 struct regmap *regmap;
691 ctrl->drv_calc_reg(bank, pin_num, ®map, ®, &bit);
693 ret = regmap_read(regmap, reg, &data);
698 data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1;
700 return rockchip_perpin_drv_list[data];
703 static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
704 int pin_num, int strength)
706 struct rockchip_pinctrl *info = bank->drvdata;
707 struct rockchip_pin_ctrl *ctrl = info->ctrl;
708 struct regmap *regmap;
714 ctrl->drv_calc_reg(bank, pin_num, ®map, ®, &bit);
717 for (i = 0; i < ARRAY_SIZE(rockchip_perpin_drv_list); i++) {
718 if (rockchip_perpin_drv_list[i] == strength) {
725 dev_err(info->dev, "unsupported driver strength %d\n",
730 spin_lock_irqsave(&bank->slock, flags);
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);
737 ret = regmap_update_bits(regmap, reg, rmask, data);
738 spin_unlock_irqrestore(&bank->slock, flags);
743 static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
745 struct rockchip_pinctrl *info = bank->drvdata;
746 struct rockchip_pin_ctrl *ctrl = info->ctrl;
747 struct regmap *regmap;
752 /* rk3066b does support any pulls */
753 if (ctrl->type == RK3066B)
754 return PIN_CONFIG_BIAS_DISABLE;
756 ctrl->pull_calc_reg(bank, pin_num, ®map, ®, &bit);
758 ret = regmap_read(regmap, reg, &data);
762 switch (ctrl->type) {
764 return !(data & BIT(bit))
765 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
766 : PIN_CONFIG_BIAS_DISABLE;
771 data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
775 return PIN_CONFIG_BIAS_DISABLE;
777 return PIN_CONFIG_BIAS_PULL_UP;
779 return PIN_CONFIG_BIAS_PULL_DOWN;
781 return PIN_CONFIG_BIAS_BUS_HOLD;
784 dev_err(info->dev, "unknown pull setting\n");
787 dev_err(info->dev, "unsupported pinctrl type\n");
792 static int rockchip_set_pull(struct rockchip_pin_bank *bank,
793 int pin_num, int pull)
795 struct rockchip_pinctrl *info = bank->drvdata;
796 struct rockchip_pin_ctrl *ctrl = info->ctrl;
797 struct regmap *regmap;
803 dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
804 bank->bank_num, pin_num, pull);
806 /* rk3066b does support any pulls */
807 if (ctrl->type == RK3066B)
808 return pull ? -EINVAL : 0;
810 ctrl->pull_calc_reg(bank, pin_num, ®map, ®, &bit);
812 switch (ctrl->type) {
814 spin_lock_irqsave(&bank->slock, flags);
816 data = BIT(bit + 16);
817 if (pull == PIN_CONFIG_BIAS_DISABLE)
819 ret = regmap_write(regmap, reg, data);
821 spin_unlock_irqrestore(&bank->slock, flags);
826 spin_lock_irqsave(&bank->slock, flags);
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);
833 case PIN_CONFIG_BIAS_DISABLE:
835 case PIN_CONFIG_BIAS_PULL_UP:
838 case PIN_CONFIG_BIAS_PULL_DOWN:
841 case PIN_CONFIG_BIAS_BUS_HOLD:
845 spin_unlock_irqrestore(&bank->slock, flags);
846 dev_err(info->dev, "unsupported pull setting %d\n",
851 ret = regmap_update_bits(regmap, reg, rmask, data);
853 spin_unlock_irqrestore(&bank->slock, flags);
856 dev_err(info->dev, "unsupported pinctrl type\n");
864 * Pinmux_ops handling
867 static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
869 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
871 return info->nfunctions;
874 static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
877 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
879 return info->functions[selector].name;
882 static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
883 unsigned selector, const char * const **groups,
884 unsigned * const num_groups)
886 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
888 *groups = info->functions[selector].groups;
889 *num_groups = info->functions[selector].ngroups;
894 static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
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;
903 dev_dbg(info->dev, "enable function %s group %s\n",
904 info->functions[selector].name, info->groups[group].name);
907 * for each pin in the pin group selected, program the correspoding pin
908 * pin function number in the config register.
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,
919 /* revert the already done pin settings */
920 for (cnt--; cnt >= 0; cnt--)
921 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
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).
934 static int _rockchip_pmx_gpio_set_direction(struct gpio_chip *chip,
937 struct rockchip_pin_bank *bank;
942 bank = gc_to_pin_bank(chip);
944 ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
948 spin_lock_irqsave(&bank->slock, flags);
950 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
951 /* set bit to 1 for output, 0 for input */
956 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
958 spin_unlock_irqrestore(&bank->slock, flags);
963 static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
964 struct pinctrl_gpio_range *range,
965 unsigned offset, bool input)
967 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
968 struct gpio_chip *chip;
972 pin = offset - chip->base;
973 dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
974 offset, range->name, pin, input ? "input" : "output");
976 return _rockchip_pmx_gpio_set_direction(chip, offset - chip->base,
980 static const struct pinmux_ops rockchip_pmx_ops = {
981 .get_functions_count = rockchip_pmx_get_funcs_count,
982 .get_function_name = rockchip_pmx_get_func_name,
983 .get_function_groups = rockchip_pmx_get_groups,
984 .set_mux = rockchip_pmx_set,
985 .gpio_set_direction = rockchip_pmx_gpio_set_direction,
989 * Pinconf_ops handling
992 static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
993 enum pin_config_param pull)
995 switch (ctrl->type) {
997 return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
998 pull == PIN_CONFIG_BIAS_DISABLE);
1000 return pull ? false : true;
1004 return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
1010 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value);
1011 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset);
1013 /* set the pin config settings for a specified pin */
1014 static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
1015 unsigned long *configs, unsigned num_configs)
1017 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
1018 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
1019 enum pin_config_param param;
1024 for (i = 0; i < num_configs; i++) {
1025 param = pinconf_to_config_param(configs[i]);
1026 arg = pinconf_to_config_argument(configs[i]);
1029 case PIN_CONFIG_BIAS_DISABLE:
1030 rc = rockchip_set_pull(bank, pin - bank->pin_base,
1035 case PIN_CONFIG_BIAS_PULL_UP:
1036 case PIN_CONFIG_BIAS_PULL_DOWN:
1037 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
1038 case PIN_CONFIG_BIAS_BUS_HOLD:
1039 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
1045 rc = rockchip_set_pull(bank, pin - bank->pin_base,
1050 case PIN_CONFIG_OUTPUT:
1051 rockchip_gpio_set(&bank->gpio_chip,
1052 pin - bank->pin_base, arg);
1053 rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip,
1054 pin - bank->pin_base, false);
1058 case PIN_CONFIG_DRIVE_STRENGTH:
1059 /* rk3288 is the first with per-pin drive-strength */
1060 if (!info->ctrl->drv_calc_reg)
1063 rc = rockchip_set_drive_perpin(bank,
1064 pin - bank->pin_base, arg);
1072 } /* for each config */
1077 /* get the pin config settings for a specified pin */
1078 static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
1079 unsigned long *config)
1081 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
1082 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
1083 enum pin_config_param param = pinconf_to_config_param(*config);
1088 case PIN_CONFIG_BIAS_DISABLE:
1089 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
1094 case PIN_CONFIG_BIAS_PULL_UP:
1095 case PIN_CONFIG_BIAS_PULL_DOWN:
1096 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
1097 case PIN_CONFIG_BIAS_BUS_HOLD:
1098 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
1101 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
1106 case PIN_CONFIG_OUTPUT:
1107 rc = rockchip_get_mux(bank, pin - bank->pin_base);
1108 if (rc != RK_FUNC_GPIO)
1111 rc = rockchip_gpio_get(&bank->gpio_chip, pin - bank->pin_base);
1117 case PIN_CONFIG_DRIVE_STRENGTH:
1118 /* rk3288 is the first with per-pin drive-strength */
1119 if (!info->ctrl->drv_calc_reg)
1122 rc = rockchip_get_drive_perpin(bank, pin - bank->pin_base);
1133 *config = pinconf_to_config_packed(param, arg);
1138 static const struct pinconf_ops rockchip_pinconf_ops = {
1139 .pin_config_get = rockchip_pinconf_get,
1140 .pin_config_set = rockchip_pinconf_set,
1144 static const struct of_device_id rockchip_bank_match[] = {
1145 { .compatible = "rockchip,gpio-bank" },
1146 { .compatible = "rockchip,rk3188-gpio-bank0" },
1150 static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
1151 struct device_node *np)
1153 struct device_node *child;
1155 for_each_child_of_node(np, child) {
1156 if (of_match_node(rockchip_bank_match, child))
1160 info->ngroups += of_get_child_count(child);
1164 static int rockchip_pinctrl_parse_groups(struct device_node *np,
1165 struct rockchip_pin_group *grp,
1166 struct rockchip_pinctrl *info,
1169 struct rockchip_pin_bank *bank;
1176 dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
1178 /* Initialise group */
1179 grp->name = np->name;
1182 * the binding format is rockchip,pins = <bank pin mux CONFIG>,
1183 * do sanity check and calculate pins number
1185 list = of_get_property(np, "rockchip,pins", &size);
1186 /* we do not check return since it's safe node passed down */
1187 size /= sizeof(*list);
1188 if (!size || size % 4) {
1189 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
1193 grp->npins = size / 4;
1195 grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
1197 grp->data = devm_kzalloc(info->dev, grp->npins *
1198 sizeof(struct rockchip_pin_config),
1200 if (!grp->pins || !grp->data)
1203 for (i = 0, j = 0; i < size; i += 4, j++) {
1204 const __be32 *phandle;
1205 struct device_node *np_config;
1207 num = be32_to_cpu(*list++);
1208 bank = bank_num_to_bank(info, num);
1210 return PTR_ERR(bank);
1212 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
1213 grp->data[j].func = be32_to_cpu(*list++);
1219 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
1220 ret = pinconf_generic_parse_dt_config(np_config, NULL,
1221 &grp->data[j].configs, &grp->data[j].nconfigs);
1229 static int rockchip_pinctrl_parse_functions(struct device_node *np,
1230 struct rockchip_pinctrl *info,
1233 struct device_node *child;
1234 struct rockchip_pmx_func *func;
1235 struct rockchip_pin_group *grp;
1237 static u32 grp_index;
1240 dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
1242 func = &info->functions[index];
1244 /* Initialise function */
1245 func->name = np->name;
1246 func->ngroups = of_get_child_count(np);
1247 if (func->ngroups <= 0)
1250 func->groups = devm_kzalloc(info->dev,
1251 func->ngroups * sizeof(char *), GFP_KERNEL);
1255 for_each_child_of_node(np, child) {
1256 func->groups[i] = child->name;
1257 grp = &info->groups[grp_index++];
1258 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
1266 static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
1267 struct rockchip_pinctrl *info)
1269 struct device *dev = &pdev->dev;
1270 struct device_node *np = dev->of_node;
1271 struct device_node *child;
1275 rockchip_pinctrl_child_count(info, np);
1277 dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
1278 dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
1280 info->functions = devm_kzalloc(dev, info->nfunctions *
1281 sizeof(struct rockchip_pmx_func),
1283 if (!info->functions) {
1284 dev_err(dev, "failed to allocate memory for function list\n");
1288 info->groups = devm_kzalloc(dev, info->ngroups *
1289 sizeof(struct rockchip_pin_group),
1291 if (!info->groups) {
1292 dev_err(dev, "failed allocate memory for ping group list\n");
1298 for_each_child_of_node(np, child) {
1299 if (of_match_node(rockchip_bank_match, child))
1302 ret = rockchip_pinctrl_parse_functions(child, info, i++);
1304 dev_err(&pdev->dev, "failed to parse function\n");
1312 static int rockchip_pinctrl_register(struct platform_device *pdev,
1313 struct rockchip_pinctrl *info)
1315 struct pinctrl_desc *ctrldesc = &info->pctl;
1316 struct pinctrl_pin_desc *pindesc, *pdesc;
1317 struct rockchip_pin_bank *pin_bank;
1321 ctrldesc->name = "rockchip-pinctrl";
1322 ctrldesc->owner = THIS_MODULE;
1323 ctrldesc->pctlops = &rockchip_pctrl_ops;
1324 ctrldesc->pmxops = &rockchip_pmx_ops;
1325 ctrldesc->confops = &rockchip_pinconf_ops;
1327 pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
1328 info->ctrl->nr_pins, GFP_KERNEL);
1330 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
1333 ctrldesc->pins = pindesc;
1334 ctrldesc->npins = info->ctrl->nr_pins;
1337 for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
1338 pin_bank = &info->ctrl->pin_banks[bank];
1339 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
1341 pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
1342 pin_bank->name, pin);
1347 ret = rockchip_pinctrl_parse_dt(pdev, info);
1351 info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
1352 if (IS_ERR(info->pctl_dev)) {
1353 dev_err(&pdev->dev, "could not register pinctrl driver\n");
1354 return PTR_ERR(info->pctl_dev);
1357 for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
1358 pin_bank = &info->ctrl->pin_banks[bank];
1359 pin_bank->grange.name = pin_bank->name;
1360 pin_bank->grange.id = bank;
1361 pin_bank->grange.pin_base = pin_bank->pin_base;
1362 pin_bank->grange.base = pin_bank->gpio_chip.base;
1363 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
1364 pin_bank->grange.gc = &pin_bank->gpio_chip;
1365 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
1375 static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
1377 return pinctrl_request_gpio(chip->base + offset);
1380 static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
1382 pinctrl_free_gpio(chip->base + offset);
1385 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
1387 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1388 void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
1389 unsigned long flags;
1392 spin_lock_irqsave(&bank->slock, flags);
1395 data &= ~BIT(offset);
1397 data |= BIT(offset);
1400 spin_unlock_irqrestore(&bank->slock, flags);
1404 * Returns the level of the pin for input direction and setting of the DR
1405 * register for output gpios.
1407 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
1409 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1412 data = readl(bank->reg_base + GPIO_EXT_PORT);
1419 * gpiolib gpio_direction_input callback function. The setting of the pin
1420 * mux function as 'gpio input' will be handled by the pinctrl susbsystem
1423 static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
1425 return pinctrl_gpio_direction_input(gc->base + offset);
1429 * gpiolib gpio_direction_output callback function. The setting of the pin
1430 * mux function as 'gpio output' will be handled by the pinctrl susbsystem
1433 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
1434 unsigned offset, int value)
1436 rockchip_gpio_set(gc, offset, value);
1437 return pinctrl_gpio_direction_output(gc->base + offset);
1441 * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
1442 * and a virtual IRQ, if not already present.
1444 static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
1446 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1452 virq = irq_create_mapping(bank->domain, offset);
1454 return (virq) ? : -ENXIO;
1457 static const struct gpio_chip rockchip_gpiolib_chip = {
1458 .request = rockchip_gpio_request,
1459 .free = rockchip_gpio_free,
1460 .set = rockchip_gpio_set,
1461 .get = rockchip_gpio_get,
1462 .direction_input = rockchip_gpio_direction_input,
1463 .direction_output = rockchip_gpio_direction_output,
1464 .to_irq = rockchip_gpio_to_irq,
1465 .owner = THIS_MODULE,
1469 * Interrupt handling
1472 static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
1474 struct irq_chip *chip = irq_get_chip(irq);
1475 struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
1478 dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
1480 chained_irq_enter(chip, desc);
1482 pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
1489 virq = irq_linear_revmap(bank->domain, irq);
1492 dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
1496 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
1499 * Triggering IRQ on both rising and falling edge
1500 * needs manual intervention.
1502 if (bank->toggle_edge_mode & BIT(irq)) {
1503 u32 data, data_old, polarity;
1504 unsigned long flags;
1506 data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
1508 spin_lock_irqsave(&bank->slock, flags);
1510 polarity = readl_relaxed(bank->reg_base +
1512 if (data & BIT(irq))
1513 polarity &= ~BIT(irq);
1515 polarity |= BIT(irq);
1517 bank->reg_base + GPIO_INT_POLARITY);
1519 spin_unlock_irqrestore(&bank->slock, flags);
1522 data = readl_relaxed(bank->reg_base +
1524 } while ((data & BIT(irq)) != (data_old & BIT(irq)));
1527 generic_handle_irq(virq);
1530 chained_irq_exit(chip, desc);
1533 static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1535 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1536 struct rockchip_pin_bank *bank = gc->private;
1537 u32 mask = BIT(d->hwirq);
1541 unsigned long flags;
1544 /* make sure the pin is configured as gpio input */
1545 ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1549 spin_lock_irqsave(&bank->slock, flags);
1551 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1553 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1555 spin_unlock_irqrestore(&bank->slock, flags);
1557 if (type & IRQ_TYPE_EDGE_BOTH)
1558 __irq_set_handler_locked(d->irq, handle_edge_irq);
1560 __irq_set_handler_locked(d->irq, handle_level_irq);
1562 spin_lock_irqsave(&bank->slock, flags);
1565 level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1566 polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1569 case IRQ_TYPE_EDGE_BOTH:
1570 bank->toggle_edge_mode |= mask;
1574 * Determine gpio state. If 1 next interrupt should be falling
1577 data = readl(bank->reg_base + GPIO_EXT_PORT);
1583 case IRQ_TYPE_EDGE_RISING:
1584 bank->toggle_edge_mode &= ~mask;
1588 case IRQ_TYPE_EDGE_FALLING:
1589 bank->toggle_edge_mode &= ~mask;
1593 case IRQ_TYPE_LEVEL_HIGH:
1594 bank->toggle_edge_mode &= ~mask;
1598 case IRQ_TYPE_LEVEL_LOW:
1599 bank->toggle_edge_mode &= ~mask;
1605 spin_unlock_irqrestore(&bank->slock, flags);
1609 writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1610 writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1613 spin_unlock_irqrestore(&bank->slock, flags);
1618 static void rockchip_irq_suspend(struct irq_data *d)
1620 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1621 struct rockchip_pin_bank *bank = gc->private;
1623 bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
1624 irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
1627 static void rockchip_irq_resume(struct irq_data *d)
1629 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1630 struct rockchip_pin_bank *bank = gc->private;
1632 irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
1635 static int rockchip_interrupts_register(struct platform_device *pdev,
1636 struct rockchip_pinctrl *info)
1638 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1639 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1640 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1641 struct irq_chip_generic *gc;
1645 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1647 dev_warn(&pdev->dev, "bank %s is not valid\n",
1652 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1653 &irq_generic_chip_ops, NULL);
1654 if (!bank->domain) {
1655 dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1660 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1661 "rockchip_gpio_irq", handle_level_irq,
1662 clr, 0, IRQ_GC_INIT_MASK_CACHE);
1664 dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1666 irq_domain_remove(bank->domain);
1671 * Linux assumes that all interrupts start out disabled/masked.
1672 * Our driver only uses the concept of masked and always keeps
1673 * things enabled, so for us that's all masked and all enabled.
1675 writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
1676 writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
1678 gc = irq_get_domain_generic_chip(bank->domain, 0);
1679 gc->reg_base = bank->reg_base;
1681 gc->chip_types[0].regs.mask = GPIO_INTMASK;
1682 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1683 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1684 gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
1685 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
1686 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1687 gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
1688 gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
1689 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1690 gc->wake_enabled = IRQ_MSK(bank->nr_pins);
1692 irq_set_handler_data(bank->irq, bank);
1693 irq_set_chained_handler(bank->irq, rockchip_irq_demux);
1699 static int rockchip_gpiolib_register(struct platform_device *pdev,
1700 struct rockchip_pinctrl *info)
1702 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1703 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1704 struct gpio_chip *gc;
1708 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1710 dev_warn(&pdev->dev, "bank %s is not valid\n",
1715 bank->gpio_chip = rockchip_gpiolib_chip;
1717 gc = &bank->gpio_chip;
1718 gc->base = bank->pin_base;
1719 gc->ngpio = bank->nr_pins;
1720 gc->dev = &pdev->dev;
1721 gc->of_node = bank->of_node;
1722 gc->label = bank->name;
1724 ret = gpiochip_add(gc);
1726 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1732 rockchip_interrupts_register(pdev, info);
1737 for (--i, --bank; i >= 0; --i, --bank) {
1740 gpiochip_remove(&bank->gpio_chip);
1745 static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1746 struct rockchip_pinctrl *info)
1748 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1749 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1752 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1755 gpiochip_remove(&bank->gpio_chip);
1761 static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1762 struct rockchip_pinctrl *info)
1764 struct resource res;
1767 if (of_address_to_resource(bank->of_node, 0, &res)) {
1768 dev_err(info->dev, "cannot find IO resource for bank\n");
1772 bank->reg_base = devm_ioremap_resource(info->dev, &res);
1773 if (IS_ERR(bank->reg_base))
1774 return PTR_ERR(bank->reg_base);
1777 * special case, where parts of the pull setting-registers are
1778 * part of the PMU register space
1780 if (of_device_is_compatible(bank->of_node,
1781 "rockchip,rk3188-gpio-bank0")) {
1782 struct device_node *node;
1784 node = of_parse_phandle(bank->of_node->parent,
1787 if (of_address_to_resource(bank->of_node, 1, &res)) {
1788 dev_err(info->dev, "cannot find IO resource for bank\n");
1792 base = devm_ioremap_resource(info->dev, &res);
1794 return PTR_ERR(base);
1795 rockchip_regmap_config.max_register =
1796 resource_size(&res) - 4;
1797 rockchip_regmap_config.name =
1798 "rockchip,rk3188-gpio-bank0-pull";
1799 bank->regmap_pull = devm_regmap_init_mmio(info->dev,
1801 &rockchip_regmap_config);
1805 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1807 bank->clk = of_clk_get(bank->of_node, 0);
1808 if (IS_ERR(bank->clk))
1809 return PTR_ERR(bank->clk);
1811 return clk_prepare_enable(bank->clk);
1814 static const struct of_device_id rockchip_pinctrl_dt_match[];
1816 /* retrieve the soc specific data */
1817 static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1818 struct rockchip_pinctrl *d,
1819 struct platform_device *pdev)
1821 const struct of_device_id *match;
1822 struct device_node *node = pdev->dev.of_node;
1823 struct device_node *np;
1824 struct rockchip_pin_ctrl *ctrl;
1825 struct rockchip_pin_bank *bank;
1826 int grf_offs, pmu_offs, i, j;
1828 match = of_match_node(rockchip_pinctrl_dt_match, node);
1829 ctrl = (struct rockchip_pin_ctrl *)match->data;
1831 for_each_child_of_node(node, np) {
1832 if (!of_find_property(np, "gpio-controller", NULL))
1835 bank = ctrl->pin_banks;
1836 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1837 if (!strcmp(bank->name, np->name)) {
1840 if (!rockchip_get_bank_data(bank, d))
1848 grf_offs = ctrl->grf_mux_offset;
1849 pmu_offs = ctrl->pmu_mux_offset;
1850 bank = ctrl->pin_banks;
1851 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1854 spin_lock_init(&bank->slock);
1856 bank->pin_base = ctrl->nr_pins;
1857 ctrl->nr_pins += bank->nr_pins;
1859 /* calculate iomux offsets */
1860 for (j = 0; j < 4; j++) {
1861 struct rockchip_iomux *iom = &bank->iomux[j];
1864 if (bank_pins >= bank->nr_pins)
1867 /* preset offset value, set new start value */
1868 if (iom->offset >= 0) {
1869 if (iom->type & IOMUX_SOURCE_PMU)
1870 pmu_offs = iom->offset;
1872 grf_offs = iom->offset;
1873 } else { /* set current offset */
1874 iom->offset = (iom->type & IOMUX_SOURCE_PMU) ?
1875 pmu_offs : grf_offs;
1878 dev_dbg(d->dev, "bank %d, iomux %d has offset 0x%x\n",
1882 * Increase offset according to iomux width.
1883 * 4bit iomux'es are spread over two registers.
1885 inc = (iom->type & IOMUX_WIDTH_4BIT) ? 8 : 4;
1886 if (iom->type & IOMUX_SOURCE_PMU)
1898 #define RK3288_GRF_GPIO6C_IOMUX 0x64
1899 #define GPIO6C6_SEL_WRITE_ENABLE BIT(28)
1901 static u32 rk3288_grf_gpio6c_iomux;
1903 static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
1905 struct rockchip_pinctrl *info = dev_get_drvdata(dev);
1906 int ret = pinctrl_force_sleep(info->pctl_dev);
1912 * RK3288 GPIO6_C6 mux would be modified by Maskrom when resume, so save
1913 * the setting here, and restore it at resume.
1915 if (info->ctrl->type == RK3288) {
1916 ret = regmap_read(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
1917 &rk3288_grf_gpio6c_iomux);
1919 pinctrl_force_default(info->pctl_dev);
1927 static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
1929 struct rockchip_pinctrl *info = dev_get_drvdata(dev);
1930 int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
1931 rk3288_grf_gpio6c_iomux |
1932 GPIO6C6_SEL_WRITE_ENABLE);
1937 return pinctrl_force_default(info->pctl_dev);
1940 static SIMPLE_DEV_PM_OPS(rockchip_pinctrl_dev_pm_ops, rockchip_pinctrl_suspend,
1941 rockchip_pinctrl_resume);
1943 static int rockchip_pinctrl_probe(struct platform_device *pdev)
1945 struct rockchip_pinctrl *info;
1946 struct device *dev = &pdev->dev;
1947 struct rockchip_pin_ctrl *ctrl;
1948 struct device_node *np = pdev->dev.of_node, *node;
1949 struct resource *res;
1953 if (!dev->of_node) {
1954 dev_err(dev, "device tree node not found\n");
1958 info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1964 ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
1966 dev_err(dev, "driver data not available\n");
1971 node = of_parse_phandle(np, "rockchip,grf", 0);
1973 info->regmap_base = syscon_node_to_regmap(node);
1974 if (IS_ERR(info->regmap_base))
1975 return PTR_ERR(info->regmap_base);
1977 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1978 base = devm_ioremap_resource(&pdev->dev, res);
1980 return PTR_ERR(base);
1982 rockchip_regmap_config.max_register = resource_size(res) - 4;
1983 rockchip_regmap_config.name = "rockchip,pinctrl";
1984 info->regmap_base = devm_regmap_init_mmio(&pdev->dev, base,
1985 &rockchip_regmap_config);
1987 /* to check for the old dt-bindings */
1988 info->reg_size = resource_size(res);
1990 /* Honor the old binding, with pull registers as 2nd resource */
1991 if (ctrl->type == RK3188 && info->reg_size < 0x200) {
1992 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1993 base = devm_ioremap_resource(&pdev->dev, res);
1995 return PTR_ERR(base);
1997 rockchip_regmap_config.max_register =
1998 resource_size(res) - 4;
1999 rockchip_regmap_config.name = "rockchip,pinctrl-pull";
2000 info->regmap_pull = devm_regmap_init_mmio(&pdev->dev,
2002 &rockchip_regmap_config);
2006 /* try to find the optional reference to the pmu syscon */
2007 node = of_parse_phandle(np, "rockchip,pmu", 0);
2009 info->regmap_pmu = syscon_node_to_regmap(node);
2010 if (IS_ERR(info->regmap_pmu))
2011 return PTR_ERR(info->regmap_pmu);
2014 ret = rockchip_gpiolib_register(pdev, info);
2018 ret = rockchip_pinctrl_register(pdev, info);
2020 rockchip_gpiolib_unregister(pdev, info);
2024 platform_set_drvdata(pdev, info);
2029 static struct rockchip_pin_bank rk2928_pin_banks[] = {
2030 PIN_BANK(0, 32, "gpio0"),
2031 PIN_BANK(1, 32, "gpio1"),
2032 PIN_BANK(2, 32, "gpio2"),
2033 PIN_BANK(3, 32, "gpio3"),
2036 static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
2037 .pin_banks = rk2928_pin_banks,
2038 .nr_banks = ARRAY_SIZE(rk2928_pin_banks),
2039 .label = "RK2928-GPIO",
2041 .grf_mux_offset = 0xa8,
2042 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
2045 static struct rockchip_pin_bank rk3066a_pin_banks[] = {
2046 PIN_BANK(0, 32, "gpio0"),
2047 PIN_BANK(1, 32, "gpio1"),
2048 PIN_BANK(2, 32, "gpio2"),
2049 PIN_BANK(3, 32, "gpio3"),
2050 PIN_BANK(4, 32, "gpio4"),
2051 PIN_BANK(6, 16, "gpio6"),
2054 static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
2055 .pin_banks = rk3066a_pin_banks,
2056 .nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
2057 .label = "RK3066a-GPIO",
2059 .grf_mux_offset = 0xa8,
2060 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
2063 static struct rockchip_pin_bank rk3066b_pin_banks[] = {
2064 PIN_BANK(0, 32, "gpio0"),
2065 PIN_BANK(1, 32, "gpio1"),
2066 PIN_BANK(2, 32, "gpio2"),
2067 PIN_BANK(3, 32, "gpio3"),
2070 static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
2071 .pin_banks = rk3066b_pin_banks,
2072 .nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
2073 .label = "RK3066b-GPIO",
2075 .grf_mux_offset = 0x60,
2078 static struct rockchip_pin_bank rk3188_pin_banks[] = {
2079 PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_GPIO_ONLY, 0, 0, 0),
2080 PIN_BANK(1, 32, "gpio1"),
2081 PIN_BANK(2, 32, "gpio2"),
2082 PIN_BANK(3, 32, "gpio3"),
2085 static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
2086 .pin_banks = rk3188_pin_banks,
2087 .nr_banks = ARRAY_SIZE(rk3188_pin_banks),
2088 .label = "RK3188-GPIO",
2090 .grf_mux_offset = 0x60,
2091 .pull_calc_reg = rk3188_calc_pull_reg_and_bit,
2094 static struct rockchip_pin_bank rk3288_pin_banks[] = {
2095 PIN_BANK_IOMUX_FLAGS(0, 24, "gpio0", IOMUX_SOURCE_PMU,
2100 PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", IOMUX_UNROUTED,
2105 PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, IOMUX_UNROUTED),
2106 PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, IOMUX_WIDTH_4BIT),
2107 PIN_BANK_IOMUX_FLAGS(4, 32, "gpio4", IOMUX_WIDTH_4BIT,
2112 PIN_BANK_IOMUX_FLAGS(5, 32, "gpio5", IOMUX_UNROUTED,
2117 PIN_BANK_IOMUX_FLAGS(6, 32, "gpio6", 0, 0, 0, IOMUX_UNROUTED),
2118 PIN_BANK_IOMUX_FLAGS(7, 32, "gpio7", 0,
2123 PIN_BANK(8, 16, "gpio8"),
2126 static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
2127 .pin_banks = rk3288_pin_banks,
2128 .nr_banks = ARRAY_SIZE(rk3288_pin_banks),
2129 .label = "RK3288-GPIO",
2131 .grf_mux_offset = 0x0,
2132 .pmu_mux_offset = 0x84,
2133 .pull_calc_reg = rk3288_calc_pull_reg_and_bit,
2134 .drv_calc_reg = rk3288_calc_drv_reg_and_bit,
2137 static struct rockchip_pin_bank rk3368_pin_banks[] = {
2138 PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU,
2143 PIN_BANK(1, 32, "gpio1"),
2144 PIN_BANK(2, 32, "gpio2"),
2145 PIN_BANK(3, 32, "gpio3"),
2148 static struct rockchip_pin_ctrl rk3368_pin_ctrl = {
2149 .pin_banks = rk3368_pin_banks,
2150 .nr_banks = ARRAY_SIZE(rk3368_pin_banks),
2151 .label = "RK3368-GPIO",
2153 .grf_mux_offset = 0x0,
2154 .pmu_mux_offset = 0x0,
2155 .pull_calc_reg = rk3368_calc_pull_reg_and_bit,
2156 .drv_calc_reg = rk3368_calc_drv_reg_and_bit,
2160 static const struct of_device_id rockchip_pinctrl_dt_match[] = {
2161 { .compatible = "rockchip,rk2928-pinctrl",
2162 .data = (void *)&rk2928_pin_ctrl },
2163 { .compatible = "rockchip,rk3066a-pinctrl",
2164 .data = (void *)&rk3066a_pin_ctrl },
2165 { .compatible = "rockchip,rk3066b-pinctrl",
2166 .data = (void *)&rk3066b_pin_ctrl },
2167 { .compatible = "rockchip,rk3188-pinctrl",
2168 .data = (void *)&rk3188_pin_ctrl },
2169 { .compatible = "rockchip,rk3288-pinctrl",
2170 .data = (void *)&rk3288_pin_ctrl },
2171 { .compatible = "rockchip,rk3368-pinctrl",
2172 .data = (void *)&rk3368_pin_ctrl },
2175 MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
2177 static struct platform_driver rockchip_pinctrl_driver = {
2178 .probe = rockchip_pinctrl_probe,
2180 .name = "rockchip-pinctrl",
2181 .pm = &rockchip_pinctrl_dev_pm_ops,
2182 .of_match_table = rockchip_pinctrl_dt_match,
2186 static int __init rockchip_pinctrl_drv_register(void)
2188 return platform_driver_register(&rockchip_pinctrl_driver);
2190 postcore_initcall(rockchip_pinctrl_drv_register);
2192 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
2193 MODULE_DESCRIPTION("Rockchip pinctrl driver");
2194 MODULE_LICENSE("GPL v2");