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 <dt-bindings/pinctrl/rockchip.h>
45 /* GPIO control registers */
46 #define GPIO_SWPORT_DR 0x00
47 #define GPIO_SWPORT_DDR 0x04
48 #define GPIO_INTEN 0x30
49 #define GPIO_INTMASK 0x34
50 #define GPIO_INTTYPE_LEVEL 0x38
51 #define GPIO_INT_POLARITY 0x3c
52 #define GPIO_INT_STATUS 0x40
53 #define GPIO_INT_RAWSTATUS 0x44
54 #define GPIO_DEBOUNCE 0x48
55 #define GPIO_PORTS_EOI 0x4c
56 #define GPIO_EXT_PORT 0x50
57 #define GPIO_LS_SYNC 0x60
59 enum rockchip_pinctrl_type {
65 enum rockchip_pin_bank_type {
71 * @reg_base: register base of the gpio bank
72 * @reg_pull: optional separate register for additional pull settings
73 * @clk: clock of the gpio bank
74 * @irq: interrupt of the gpio bank
75 * @pin_base: first pin number
76 * @nr_pins: number of pins in this bank
77 * @name: name of the bank
78 * @bank_num: number of the bank, to account for holes
79 * @valid: are all necessary informations present
80 * @of_node: dt node of this bank
81 * @drvdata: common pinctrl basedata
82 * @domain: irqdomain of the gpio bank
83 * @gpio_chip: gpiolib chip
85 * @slock: spinlock for the gpio bank
87 struct rockchip_pin_bank {
88 void __iomem *reg_base;
89 void __iomem *reg_pull;
96 enum rockchip_pin_bank_type bank_type;
98 struct device_node *of_node;
99 struct rockchip_pinctrl *drvdata;
100 struct irq_domain *domain;
101 struct gpio_chip gpio_chip;
102 struct pinctrl_gpio_range grange;
104 u32 toggle_edge_mode;
107 #define PIN_BANK(id, pins, label) \
116 struct rockchip_pin_ctrl {
117 struct rockchip_pin_bank *pin_banks;
121 enum rockchip_pinctrl_type type;
123 void (*pull_calc_reg)(struct rockchip_pin_bank *bank, int pin_num,
124 void __iomem **reg, u8 *bit);
127 struct rockchip_pin_config {
129 unsigned long *configs;
130 unsigned int nconfigs;
134 * struct rockchip_pin_group: represent group of pins of a pinmux function.
135 * @name: name of the pin group, used to lookup the group.
136 * @pins: the pins included in this group.
137 * @npins: number of pins included in this group.
138 * @func: the mux function number to be programmed when selected.
139 * @configs: the config values to be set for each pin
140 * @nconfigs: number of configs for each pin
142 struct rockchip_pin_group {
146 struct rockchip_pin_config *data;
150 * struct rockchip_pmx_func: represent a pin function.
151 * @name: name of the pin function, used to lookup the function.
152 * @groups: one or more names of pin groups that provide this function.
153 * @num_groups: number of groups included in @groups.
155 struct rockchip_pmx_func {
161 struct rockchip_pinctrl {
162 void __iomem *reg_base;
163 void __iomem *reg_pull;
165 struct rockchip_pin_ctrl *ctrl;
166 struct pinctrl_desc pctl;
167 struct pinctrl_dev *pctl_dev;
168 struct rockchip_pin_group *groups;
169 unsigned int ngroups;
170 struct rockchip_pmx_func *functions;
171 unsigned int nfunctions;
174 static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
176 return container_of(gc, struct rockchip_pin_bank, gpio_chip);
179 static const inline struct rockchip_pin_group *pinctrl_name_to_group(
180 const struct rockchip_pinctrl *info,
185 for (i = 0; i < info->ngroups; i++) {
186 if (!strcmp(info->groups[i].name, name))
187 return &info->groups[i];
194 * given a pin number that is local to a pin controller, find out the pin bank
195 * and the register base of the pin bank.
197 static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
200 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
202 while (pin >= (b->pin_base + b->nr_pins))
208 static struct rockchip_pin_bank *bank_num_to_bank(
209 struct rockchip_pinctrl *info,
212 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
215 for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
216 if (b->bank_num == num)
220 return ERR_PTR(-EINVAL);
224 * Pinctrl_ops handling
227 static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
229 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
231 return info->ngroups;
234 static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
237 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
239 return info->groups[selector].name;
242 static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
243 unsigned selector, const unsigned **pins,
246 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
248 if (selector >= info->ngroups)
251 *pins = info->groups[selector].pins;
252 *npins = info->groups[selector].npins;
257 static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
258 struct device_node *np,
259 struct pinctrl_map **map, unsigned *num_maps)
261 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
262 const struct rockchip_pin_group *grp;
263 struct pinctrl_map *new_map;
264 struct device_node *parent;
269 * first find the group of this node and check if we need to create
270 * config maps for pins
272 grp = pinctrl_name_to_group(info, np->name);
274 dev_err(info->dev, "unable to find group for node %s\n",
279 map_num += grp->npins;
280 new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
289 parent = of_get_parent(np);
291 devm_kfree(pctldev->dev, new_map);
294 new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
295 new_map[0].data.mux.function = parent->name;
296 new_map[0].data.mux.group = np->name;
299 /* create config map */
301 for (i = 0; i < grp->npins; i++) {
302 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
303 new_map[i].data.configs.group_or_pin =
304 pin_get_name(pctldev, grp->pins[i]);
305 new_map[i].data.configs.configs = grp->data[i].configs;
306 new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
309 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
310 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
315 static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
316 struct pinctrl_map *map, unsigned num_maps)
320 static const struct pinctrl_ops rockchip_pctrl_ops = {
321 .get_groups_count = rockchip_get_groups_count,
322 .get_group_name = rockchip_get_group_name,
323 .get_group_pins = rockchip_get_group_pins,
324 .dt_node_to_map = rockchip_dt_node_to_map,
325 .dt_free_map = rockchip_dt_free_map,
333 * Set a new mux function for a pin.
335 * The register is divided into the upper and lower 16 bit. When changing
336 * a value, the previous register value is not read and changed. Instead
337 * it seems the changed bits are marked in the upper 16 bit, while the
338 * changed value gets set in the same offset in the lower 16 bit.
339 * All pin settings seem to be 2 bit wide in both the upper and lower
341 * @bank: pin bank to change
342 * @pin: pin to change
343 * @mux: new mux function to set
345 static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
347 struct rockchip_pinctrl *info = bank->drvdata;
348 void __iomem *reg = info->reg_base + info->ctrl->mux_offset;
353 dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
354 bank->bank_num, pin, mux);
356 /* get basic quadrupel of mux registers and the correct reg inside */
357 reg += bank->bank_num * 0x10;
358 reg += (pin / 8) * 4;
361 spin_lock_irqsave(&bank->slock, flags);
363 data = (3 << (bit + 16));
364 data |= (mux & 3) << bit;
367 spin_unlock_irqrestore(&bank->slock, flags);
370 #define RK2928_PULL_OFFSET 0x118
371 #define RK2928_PULL_PINS_PER_REG 16
372 #define RK2928_PULL_BANK_STRIDE 8
374 static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
375 int pin_num, void __iomem **reg, u8 *bit)
377 struct rockchip_pinctrl *info = bank->drvdata;
379 *reg = info->reg_base + RK2928_PULL_OFFSET;
380 *reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
381 *reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
383 *bit = pin_num % RK2928_PULL_PINS_PER_REG;
386 #define RK3188_PULL_BITS_PER_PIN 2
387 #define RK3188_PULL_PINS_PER_REG 8
388 #define RK3188_PULL_BANK_STRIDE 16
390 static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
391 int pin_num, void __iomem **reg, u8 *bit)
393 struct rockchip_pinctrl *info = bank->drvdata;
395 /* The first 12 pins of the first bank are located elsewhere */
396 if (bank->bank_type == RK3188_BANK0 && pin_num < 12) {
397 *reg = bank->reg_pull +
398 ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
399 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
400 *bit *= RK3188_PULL_BITS_PER_PIN;
402 *reg = info->reg_pull - 4;
403 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
404 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
407 * The bits in these registers have an inverse ordering
408 * with the lowest pin being in bits 15:14 and the highest
411 *bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
412 *bit *= RK3188_PULL_BITS_PER_PIN;
416 static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
418 struct rockchip_pinctrl *info = bank->drvdata;
419 struct rockchip_pin_ctrl *ctrl = info->ctrl;
424 /* rk3066b does support any pulls */
425 if (ctrl->type == RK3066B)
426 return PIN_CONFIG_BIAS_DISABLE;
428 ctrl->pull_calc_reg(bank, pin_num, ®, &bit);
430 switch (ctrl->type) {
432 return !(readl_relaxed(reg) & BIT(bit))
433 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
434 : PIN_CONFIG_BIAS_DISABLE;
436 data = readl_relaxed(reg) >> bit;
437 data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
441 return PIN_CONFIG_BIAS_DISABLE;
443 return PIN_CONFIG_BIAS_PULL_UP;
445 return PIN_CONFIG_BIAS_PULL_DOWN;
447 return PIN_CONFIG_BIAS_BUS_HOLD;
450 dev_err(info->dev, "unknown pull setting\n");
453 dev_err(info->dev, "unsupported pinctrl type\n");
458 static int rockchip_set_pull(struct rockchip_pin_bank *bank,
459 int pin_num, int pull)
461 struct rockchip_pinctrl *info = bank->drvdata;
462 struct rockchip_pin_ctrl *ctrl = info->ctrl;
468 dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
469 bank->bank_num, pin_num, pull);
471 /* rk3066b does support any pulls */
472 if (ctrl->type == RK3066B)
473 return pull ? -EINVAL : 0;
475 ctrl->pull_calc_reg(bank, pin_num, ®, &bit);
477 switch (ctrl->type) {
479 spin_lock_irqsave(&bank->slock, flags);
481 data = BIT(bit + 16);
482 if (pull == PIN_CONFIG_BIAS_DISABLE)
486 spin_unlock_irqrestore(&bank->slock, flags);
489 spin_lock_irqsave(&bank->slock, flags);
491 /* enable the write to the equivalent lower bits */
492 data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
495 case PIN_CONFIG_BIAS_DISABLE:
497 case PIN_CONFIG_BIAS_PULL_UP:
500 case PIN_CONFIG_BIAS_PULL_DOWN:
503 case PIN_CONFIG_BIAS_BUS_HOLD:
507 spin_unlock_irqrestore(&bank->slock, flags);
508 dev_err(info->dev, "unsupported pull setting %d\n",
515 spin_unlock_irqrestore(&bank->slock, flags);
518 dev_err(info->dev, "unsupported pinctrl type\n");
526 * Pinmux_ops handling
529 static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
531 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
533 return info->nfunctions;
536 static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
539 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
541 return info->functions[selector].name;
544 static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
545 unsigned selector, const char * const **groups,
546 unsigned * const num_groups)
548 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
550 *groups = info->functions[selector].groups;
551 *num_groups = info->functions[selector].ngroups;
556 static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
559 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
560 const unsigned int *pins = info->groups[group].pins;
561 const struct rockchip_pin_config *data = info->groups[group].data;
562 struct rockchip_pin_bank *bank;
565 dev_dbg(info->dev, "enable function %s group %s\n",
566 info->functions[selector].name, info->groups[group].name);
569 * for each pin in the pin group selected, program the correspoding pin
570 * pin function number in the config register.
572 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
573 bank = pin_to_bank(info, pins[cnt]);
574 rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
581 static void rockchip_pmx_disable(struct pinctrl_dev *pctldev,
582 unsigned selector, unsigned group)
584 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
585 const unsigned int *pins = info->groups[group].pins;
586 struct rockchip_pin_bank *bank;
589 dev_dbg(info->dev, "disable function %s group %s\n",
590 info->functions[selector].name, info->groups[group].name);
592 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
593 bank = pin_to_bank(info, pins[cnt]);
594 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
599 * The calls to gpio_direction_output() and gpio_direction_input()
600 * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
601 * function called from the gpiolib interface).
603 static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
604 struct pinctrl_gpio_range *range,
605 unsigned offset, bool input)
607 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
608 struct rockchip_pin_bank *bank;
609 struct gpio_chip *chip;
614 bank = gc_to_pin_bank(chip);
615 pin = offset - chip->base;
617 dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
618 offset, range->name, pin, input ? "input" : "output");
620 rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
622 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
623 /* set bit to 1 for output, 0 for input */
628 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
633 static const struct pinmux_ops rockchip_pmx_ops = {
634 .get_functions_count = rockchip_pmx_get_funcs_count,
635 .get_function_name = rockchip_pmx_get_func_name,
636 .get_function_groups = rockchip_pmx_get_groups,
637 .enable = rockchip_pmx_enable,
638 .disable = rockchip_pmx_disable,
639 .gpio_set_direction = rockchip_pmx_gpio_set_direction,
643 * Pinconf_ops handling
646 static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
647 enum pin_config_param pull)
649 switch (ctrl->type) {
651 return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
652 pull == PIN_CONFIG_BIAS_DISABLE);
654 return pull ? false : true;
656 return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
662 /* set the pin config settings for a specified pin */
663 static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
664 unsigned long *configs, unsigned num_configs)
666 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
667 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
668 enum pin_config_param param;
673 for (i = 0; i < num_configs; i++) {
674 param = pinconf_to_config_param(configs[i]);
675 arg = pinconf_to_config_argument(configs[i]);
678 case PIN_CONFIG_BIAS_DISABLE:
679 rc = rockchip_set_pull(bank, pin - bank->pin_base,
684 case PIN_CONFIG_BIAS_PULL_UP:
685 case PIN_CONFIG_BIAS_PULL_DOWN:
686 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
687 case PIN_CONFIG_BIAS_BUS_HOLD:
688 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
694 rc = rockchip_set_pull(bank, pin - bank->pin_base,
703 } /* for each config */
708 /* get the pin config settings for a specified pin */
709 static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
710 unsigned long *config)
712 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
713 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
714 enum pin_config_param param = pinconf_to_config_param(*config);
717 case PIN_CONFIG_BIAS_DISABLE:
718 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
723 case PIN_CONFIG_BIAS_PULL_UP:
724 case PIN_CONFIG_BIAS_PULL_DOWN:
725 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
726 case PIN_CONFIG_BIAS_BUS_HOLD:
727 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
730 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
743 static const struct pinconf_ops rockchip_pinconf_ops = {
744 .pin_config_get = rockchip_pinconf_get,
745 .pin_config_set = rockchip_pinconf_set,
748 static const struct of_device_id rockchip_bank_match[] = {
749 { .compatible = "rockchip,gpio-bank" },
750 { .compatible = "rockchip,rk3188-gpio-bank0" },
754 static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
755 struct device_node *np)
757 struct device_node *child;
759 for_each_child_of_node(np, child) {
760 if (of_match_node(rockchip_bank_match, child))
764 info->ngroups += of_get_child_count(child);
768 static int rockchip_pinctrl_parse_groups(struct device_node *np,
769 struct rockchip_pin_group *grp,
770 struct rockchip_pinctrl *info,
773 struct rockchip_pin_bank *bank;
780 dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
782 /* Initialise group */
783 grp->name = np->name;
786 * the binding format is rockchip,pins = <bank pin mux CONFIG>,
787 * do sanity check and calculate pins number
789 list = of_get_property(np, "rockchip,pins", &size);
790 /* we do not check return since it's safe node passed down */
791 size /= sizeof(*list);
792 if (!size || size % 4) {
793 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
797 grp->npins = size / 4;
799 grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
801 grp->data = devm_kzalloc(info->dev, grp->npins *
802 sizeof(struct rockchip_pin_config),
804 if (!grp->pins || !grp->data)
807 for (i = 0, j = 0; i < size; i += 4, j++) {
808 const __be32 *phandle;
809 struct device_node *np_config;
811 num = be32_to_cpu(*list++);
812 bank = bank_num_to_bank(info, num);
814 return PTR_ERR(bank);
816 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
817 grp->data[j].func = be32_to_cpu(*list++);
823 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
824 ret = pinconf_generic_parse_dt_config(np_config,
825 &grp->data[j].configs, &grp->data[j].nconfigs);
833 static int rockchip_pinctrl_parse_functions(struct device_node *np,
834 struct rockchip_pinctrl *info,
837 struct device_node *child;
838 struct rockchip_pmx_func *func;
839 struct rockchip_pin_group *grp;
841 static u32 grp_index;
844 dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
846 func = &info->functions[index];
848 /* Initialise function */
849 func->name = np->name;
850 func->ngroups = of_get_child_count(np);
851 if (func->ngroups <= 0)
854 func->groups = devm_kzalloc(info->dev,
855 func->ngroups * sizeof(char *), GFP_KERNEL);
859 for_each_child_of_node(np, child) {
860 func->groups[i] = child->name;
861 grp = &info->groups[grp_index++];
862 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
870 static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
871 struct rockchip_pinctrl *info)
873 struct device *dev = &pdev->dev;
874 struct device_node *np = dev->of_node;
875 struct device_node *child;
879 rockchip_pinctrl_child_count(info, np);
881 dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
882 dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
884 info->functions = devm_kzalloc(dev, info->nfunctions *
885 sizeof(struct rockchip_pmx_func),
887 if (!info->functions) {
888 dev_err(dev, "failed to allocate memory for function list\n");
892 info->groups = devm_kzalloc(dev, info->ngroups *
893 sizeof(struct rockchip_pin_group),
896 dev_err(dev, "failed allocate memory for ping group list\n");
902 for_each_child_of_node(np, child) {
903 if (of_match_node(rockchip_bank_match, child))
906 ret = rockchip_pinctrl_parse_functions(child, info, i++);
908 dev_err(&pdev->dev, "failed to parse function\n");
916 static int rockchip_pinctrl_register(struct platform_device *pdev,
917 struct rockchip_pinctrl *info)
919 struct pinctrl_desc *ctrldesc = &info->pctl;
920 struct pinctrl_pin_desc *pindesc, *pdesc;
921 struct rockchip_pin_bank *pin_bank;
925 ctrldesc->name = "rockchip-pinctrl";
926 ctrldesc->owner = THIS_MODULE;
927 ctrldesc->pctlops = &rockchip_pctrl_ops;
928 ctrldesc->pmxops = &rockchip_pmx_ops;
929 ctrldesc->confops = &rockchip_pinconf_ops;
931 pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
932 info->ctrl->nr_pins, GFP_KERNEL);
934 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
937 ctrldesc->pins = pindesc;
938 ctrldesc->npins = info->ctrl->nr_pins;
941 for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
942 pin_bank = &info->ctrl->pin_banks[bank];
943 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
945 pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
946 pin_bank->name, pin);
951 info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
952 if (!info->pctl_dev) {
953 dev_err(&pdev->dev, "could not register pinctrl driver\n");
957 for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
958 pin_bank = &info->ctrl->pin_banks[bank];
959 pin_bank->grange.name = pin_bank->name;
960 pin_bank->grange.id = bank;
961 pin_bank->grange.pin_base = pin_bank->pin_base;
962 pin_bank->grange.base = pin_bank->gpio_chip.base;
963 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
964 pin_bank->grange.gc = &pin_bank->gpio_chip;
965 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
968 ret = rockchip_pinctrl_parse_dt(pdev, info);
970 pinctrl_unregister(info->pctl_dev);
981 static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
983 return pinctrl_request_gpio(chip->base + offset);
986 static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
988 pinctrl_free_gpio(chip->base + offset);
991 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
993 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
994 void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
998 spin_lock_irqsave(&bank->slock, flags);
1001 data &= ~BIT(offset);
1003 data |= BIT(offset);
1006 spin_unlock_irqrestore(&bank->slock, flags);
1010 * Returns the level of the pin for input direction and setting of the DR
1011 * register for output gpios.
1013 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
1015 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1018 data = readl(bank->reg_base + GPIO_EXT_PORT);
1025 * gpiolib gpio_direction_input callback function. The setting of the pin
1026 * mux function as 'gpio input' will be handled by the pinctrl susbsystem
1029 static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
1031 return pinctrl_gpio_direction_input(gc->base + offset);
1035 * gpiolib gpio_direction_output callback function. The setting of the pin
1036 * mux function as 'gpio output' will be handled by the pinctrl susbsystem
1039 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
1040 unsigned offset, int value)
1042 rockchip_gpio_set(gc, offset, value);
1043 return pinctrl_gpio_direction_output(gc->base + offset);
1047 * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
1048 * and a virtual IRQ, if not already present.
1050 static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
1052 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1058 virq = irq_create_mapping(bank->domain, offset);
1060 return (virq) ? : -ENXIO;
1063 static const struct gpio_chip rockchip_gpiolib_chip = {
1064 .request = rockchip_gpio_request,
1065 .free = rockchip_gpio_free,
1066 .set = rockchip_gpio_set,
1067 .get = rockchip_gpio_get,
1068 .direction_input = rockchip_gpio_direction_input,
1069 .direction_output = rockchip_gpio_direction_output,
1070 .to_irq = rockchip_gpio_to_irq,
1071 .owner = THIS_MODULE,
1075 * Interrupt handling
1078 static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
1080 struct irq_chip *chip = irq_get_chip(irq);
1081 struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
1082 u32 polarity = 0, data = 0;
1084 bool edge_changed = false;
1086 dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
1088 chained_irq_enter(chip, desc);
1090 pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
1092 if (bank->toggle_edge_mode) {
1093 polarity = readl_relaxed(bank->reg_base +
1095 data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
1103 virq = irq_linear_revmap(bank->domain, irq);
1106 dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
1110 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
1113 * Triggering IRQ on both rising and falling edge
1114 * needs manual intervention.
1116 if (bank->toggle_edge_mode & BIT(irq)) {
1117 if (data & BIT(irq))
1118 polarity &= ~BIT(irq);
1120 polarity |= BIT(irq);
1122 edge_changed = true;
1125 generic_handle_irq(virq);
1128 if (bank->toggle_edge_mode && edge_changed) {
1129 /* Interrupt params should only be set with ints disabled */
1130 data = readl_relaxed(bank->reg_base + GPIO_INTEN);
1131 writel_relaxed(0, bank->reg_base + GPIO_INTEN);
1132 writel(polarity, bank->reg_base + GPIO_INT_POLARITY);
1133 writel(data, bank->reg_base + GPIO_INTEN);
1136 chained_irq_exit(chip, desc);
1139 static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1141 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1142 struct rockchip_pin_bank *bank = gc->private;
1143 u32 mask = BIT(d->hwirq);
1148 /* make sure the pin is configured as gpio input */
1149 rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1150 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1152 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1154 if (type & IRQ_TYPE_EDGE_BOTH)
1155 __irq_set_handler_locked(d->irq, handle_edge_irq);
1157 __irq_set_handler_locked(d->irq, handle_level_irq);
1161 level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1162 polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1165 case IRQ_TYPE_EDGE_BOTH:
1166 bank->toggle_edge_mode |= mask;
1170 * Determine gpio state. If 1 next interrupt should be falling
1173 data = readl(bank->reg_base + GPIO_EXT_PORT);
1179 case IRQ_TYPE_EDGE_RISING:
1180 bank->toggle_edge_mode &= ~mask;
1184 case IRQ_TYPE_EDGE_FALLING:
1185 bank->toggle_edge_mode &= ~mask;
1189 case IRQ_TYPE_LEVEL_HIGH:
1190 bank->toggle_edge_mode &= ~mask;
1194 case IRQ_TYPE_LEVEL_LOW:
1195 bank->toggle_edge_mode &= ~mask;
1204 writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1205 writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1212 static int rockchip_interrupts_register(struct platform_device *pdev,
1213 struct rockchip_pinctrl *info)
1215 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1216 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1217 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1218 struct irq_chip_generic *gc;
1222 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1224 dev_warn(&pdev->dev, "bank %s is not valid\n",
1229 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1230 &irq_generic_chip_ops, NULL);
1231 if (!bank->domain) {
1232 dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1237 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1238 "rockchip_gpio_irq", handle_level_irq,
1239 clr, 0, IRQ_GC_INIT_MASK_CACHE);
1241 dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1243 irq_domain_remove(bank->domain);
1247 gc = irq_get_domain_generic_chip(bank->domain, 0);
1248 gc->reg_base = bank->reg_base;
1250 gc->chip_types[0].regs.mask = GPIO_INTEN;
1251 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1252 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1253 gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
1254 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
1255 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1256 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1258 irq_set_handler_data(bank->irq, bank);
1259 irq_set_chained_handler(bank->irq, rockchip_irq_demux);
1265 static int rockchip_gpiolib_register(struct platform_device *pdev,
1266 struct rockchip_pinctrl *info)
1268 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1269 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1270 struct gpio_chip *gc;
1274 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1276 dev_warn(&pdev->dev, "bank %s is not valid\n",
1281 bank->gpio_chip = rockchip_gpiolib_chip;
1283 gc = &bank->gpio_chip;
1284 gc->base = bank->pin_base;
1285 gc->ngpio = bank->nr_pins;
1286 gc->dev = &pdev->dev;
1287 gc->of_node = bank->of_node;
1288 gc->label = bank->name;
1290 ret = gpiochip_add(gc);
1292 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1298 rockchip_interrupts_register(pdev, info);
1303 for (--i, --bank; i >= 0; --i, --bank) {
1307 if (gpiochip_remove(&bank->gpio_chip))
1308 dev_err(&pdev->dev, "gpio chip %s remove failed\n",
1309 bank->gpio_chip.label);
1314 static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1315 struct rockchip_pinctrl *info)
1317 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1318 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1322 for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) {
1326 ret = gpiochip_remove(&bank->gpio_chip);
1330 dev_err(&pdev->dev, "gpio chip remove failed\n");
1335 static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1338 struct resource res;
1340 if (of_address_to_resource(bank->of_node, 0, &res)) {
1341 dev_err(dev, "cannot find IO resource for bank\n");
1345 bank->reg_base = devm_ioremap_resource(dev, &res);
1346 if (IS_ERR(bank->reg_base))
1347 return PTR_ERR(bank->reg_base);
1350 * special case, where parts of the pull setting-registers are
1351 * part of the PMU register space
1353 if (of_device_is_compatible(bank->of_node,
1354 "rockchip,rk3188-gpio-bank0")) {
1355 bank->bank_type = RK3188_BANK0;
1357 if (of_address_to_resource(bank->of_node, 1, &res)) {
1358 dev_err(dev, "cannot find IO resource for bank\n");
1362 bank->reg_pull = devm_ioremap_resource(dev, &res);
1363 if (IS_ERR(bank->reg_pull))
1364 return PTR_ERR(bank->reg_pull);
1366 bank->bank_type = COMMON_BANK;
1369 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1371 bank->clk = of_clk_get(bank->of_node, 0);
1372 if (IS_ERR(bank->clk))
1373 return PTR_ERR(bank->clk);
1375 return clk_prepare_enable(bank->clk);
1378 static const struct of_device_id rockchip_pinctrl_dt_match[];
1380 /* retrieve the soc specific data */
1381 static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1382 struct rockchip_pinctrl *d,
1383 struct platform_device *pdev)
1385 const struct of_device_id *match;
1386 struct device_node *node = pdev->dev.of_node;
1387 struct device_node *np;
1388 struct rockchip_pin_ctrl *ctrl;
1389 struct rockchip_pin_bank *bank;
1392 match = of_match_node(rockchip_pinctrl_dt_match, node);
1393 ctrl = (struct rockchip_pin_ctrl *)match->data;
1395 for_each_child_of_node(node, np) {
1396 if (!of_find_property(np, "gpio-controller", NULL))
1399 bank = ctrl->pin_banks;
1400 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1401 if (!strcmp(bank->name, np->name)) {
1404 if (!rockchip_get_bank_data(bank, &pdev->dev))
1412 bank = ctrl->pin_banks;
1413 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1414 spin_lock_init(&bank->slock);
1416 bank->pin_base = ctrl->nr_pins;
1417 ctrl->nr_pins += bank->nr_pins;
1423 static int rockchip_pinctrl_probe(struct platform_device *pdev)
1425 struct rockchip_pinctrl *info;
1426 struct device *dev = &pdev->dev;
1427 struct rockchip_pin_ctrl *ctrl;
1428 struct resource *res;
1431 if (!dev->of_node) {
1432 dev_err(dev, "device tree node not found\n");
1436 info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1440 ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
1442 dev_err(dev, "driver data not available\n");
1448 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1449 info->reg_base = devm_ioremap_resource(&pdev->dev, res);
1450 if (IS_ERR(info->reg_base))
1451 return PTR_ERR(info->reg_base);
1453 /* The RK3188 has its pull registers in a separate place */
1454 if (ctrl->type == RK3188) {
1455 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1456 info->reg_pull = devm_ioremap_resource(&pdev->dev, res);
1457 if (IS_ERR(info->reg_pull))
1458 return PTR_ERR(info->reg_pull);
1461 ret = rockchip_gpiolib_register(pdev, info);
1465 ret = rockchip_pinctrl_register(pdev, info);
1467 rockchip_gpiolib_unregister(pdev, info);
1471 platform_set_drvdata(pdev, info);
1476 static struct rockchip_pin_bank rk2928_pin_banks[] = {
1477 PIN_BANK(0, 32, "gpio0"),
1478 PIN_BANK(1, 32, "gpio1"),
1479 PIN_BANK(2, 32, "gpio2"),
1480 PIN_BANK(3, 32, "gpio3"),
1483 static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
1484 .pin_banks = rk2928_pin_banks,
1485 .nr_banks = ARRAY_SIZE(rk2928_pin_banks),
1486 .label = "RK2928-GPIO",
1489 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
1492 static struct rockchip_pin_bank rk3066a_pin_banks[] = {
1493 PIN_BANK(0, 32, "gpio0"),
1494 PIN_BANK(1, 32, "gpio1"),
1495 PIN_BANK(2, 32, "gpio2"),
1496 PIN_BANK(3, 32, "gpio3"),
1497 PIN_BANK(4, 32, "gpio4"),
1498 PIN_BANK(6, 16, "gpio6"),
1501 static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
1502 .pin_banks = rk3066a_pin_banks,
1503 .nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
1504 .label = "RK3066a-GPIO",
1507 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
1510 static struct rockchip_pin_bank rk3066b_pin_banks[] = {
1511 PIN_BANK(0, 32, "gpio0"),
1512 PIN_BANK(1, 32, "gpio1"),
1513 PIN_BANK(2, 32, "gpio2"),
1514 PIN_BANK(3, 32, "gpio3"),
1517 static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
1518 .pin_banks = rk3066b_pin_banks,
1519 .nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
1520 .label = "RK3066b-GPIO",
1525 static struct rockchip_pin_bank rk3188_pin_banks[] = {
1526 PIN_BANK(0, 32, "gpio0"),
1527 PIN_BANK(1, 32, "gpio1"),
1528 PIN_BANK(2, 32, "gpio2"),
1529 PIN_BANK(3, 32, "gpio3"),
1532 static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
1533 .pin_banks = rk3188_pin_banks,
1534 .nr_banks = ARRAY_SIZE(rk3188_pin_banks),
1535 .label = "RK3188-GPIO",
1538 .pull_calc_reg = rk3188_calc_pull_reg_and_bit,
1541 static const struct of_device_id rockchip_pinctrl_dt_match[] = {
1542 { .compatible = "rockchip,rk2928-pinctrl",
1543 .data = (void *)&rk2928_pin_ctrl },
1544 { .compatible = "rockchip,rk3066a-pinctrl",
1545 .data = (void *)&rk3066a_pin_ctrl },
1546 { .compatible = "rockchip,rk3066b-pinctrl",
1547 .data = (void *)&rk3066b_pin_ctrl },
1548 { .compatible = "rockchip,rk3188-pinctrl",
1549 .data = (void *)&rk3188_pin_ctrl },
1552 MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
1554 static struct platform_driver rockchip_pinctrl_driver = {
1555 .probe = rockchip_pinctrl_probe,
1557 .name = "rockchip-pinctrl",
1558 .owner = THIS_MODULE,
1559 .of_match_table = rockchip_pinctrl_dt_match,
1563 static int __init rockchip_pinctrl_drv_register(void)
1565 return platform_driver_register(&rockchip_pinctrl_driver);
1567 postcore_initcall(rockchip_pinctrl_drv_register);
1569 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
1570 MODULE_DESCRIPTION("Rockchip pinctrl driver");
1571 MODULE_LICENSE("GPL v2");