1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander
5 * Copyright (C) 2019 STMicroelectronics
8 #include <linux/gpio/driver.h>
9 #include <linux/interrupt.h>
10 #include <linux/mfd/stmfx.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/seq_file.h>
15 #include <linux/pinctrl/pinconf.h>
16 #include <linux/pinctrl/pinmux.h>
19 #include "pinctrl-utils.h"
22 /* GPIO_STATE1 0x10, GPIO_STATE2 0x11, GPIO_STATE3 0x12 */
23 #define STMFX_REG_GPIO_STATE STMFX_REG_GPIO_STATE1 /* R */
24 /* GPIO_DIR1 0x60, GPIO_DIR2 0x61, GPIO_DIR3 0x63 */
25 #define STMFX_REG_GPIO_DIR STMFX_REG_GPIO_DIR1 /* RW */
26 /* GPIO_TYPE1 0x64, GPIO_TYPE2 0x65, GPIO_TYPE3 0x66 */
27 #define STMFX_REG_GPIO_TYPE STMFX_REG_GPIO_TYPE1 /* RW */
28 /* GPIO_PUPD1 0x68, GPIO_PUPD2 0x69, GPIO_PUPD3 0x6A */
29 #define STMFX_REG_GPIO_PUPD STMFX_REG_GPIO_PUPD1 /* RW */
30 /* GPO_SET1 0x6C, GPO_SET2 0x6D, GPO_SET3 0x6E */
31 #define STMFX_REG_GPO_SET STMFX_REG_GPO_SET1 /* RW */
32 /* GPO_CLR1 0x70, GPO_CLR2 0x71, GPO_CLR3 0x72 */
33 #define STMFX_REG_GPO_CLR STMFX_REG_GPO_CLR1 /* RW */
34 /* IRQ_GPI_SRC1 0x48, IRQ_GPI_SRC2 0x49, IRQ_GPI_SRC3 0x4A */
35 #define STMFX_REG_IRQ_GPI_SRC STMFX_REG_IRQ_GPI_SRC1 /* RW */
36 /* IRQ_GPI_EVT1 0x4C, IRQ_GPI_EVT2 0x4D, IRQ_GPI_EVT3 0x4E */
37 #define STMFX_REG_IRQ_GPI_EVT STMFX_REG_IRQ_GPI_EVT1 /* RW */
38 /* IRQ_GPI_TYPE1 0x50, IRQ_GPI_TYPE2 0x51, IRQ_GPI_TYPE3 0x52 */
39 #define STMFX_REG_IRQ_GPI_TYPE STMFX_REG_IRQ_GPI_TYPE1 /* RW */
40 /* IRQ_GPI_PENDING1 0x0C, IRQ_GPI_PENDING2 0x0D, IRQ_GPI_PENDING3 0x0E*/
41 #define STMFX_REG_IRQ_GPI_PENDING STMFX_REG_IRQ_GPI_PENDING1 /* R */
42 /* IRQ_GPI_ACK1 0x54, IRQ_GPI_ACK2 0x55, IRQ_GPI_ACK3 0x56 */
43 #define STMFX_REG_IRQ_GPI_ACK STMFX_REG_IRQ_GPI_ACK1 /* RW */
45 #define NR_GPIO_REGS 3
46 #define NR_GPIOS_PER_REG 8
47 #define get_reg(offset) ((offset) / NR_GPIOS_PER_REG)
48 #define get_shift(offset) ((offset) % NR_GPIOS_PER_REG)
49 #define get_mask(offset) (BIT(get_shift(offset)))
52 * STMFX pinctrl can have up to 24 pins if STMFX other functions are not used.
53 * Pins availability is managed thanks to gpio-ranges property.
55 static const struct pinctrl_pin_desc stmfx_pins[] = {
56 PINCTRL_PIN(0, "gpio0"),
57 PINCTRL_PIN(1, "gpio1"),
58 PINCTRL_PIN(2, "gpio2"),
59 PINCTRL_PIN(3, "gpio3"),
60 PINCTRL_PIN(4, "gpio4"),
61 PINCTRL_PIN(5, "gpio5"),
62 PINCTRL_PIN(6, "gpio6"),
63 PINCTRL_PIN(7, "gpio7"),
64 PINCTRL_PIN(8, "gpio8"),
65 PINCTRL_PIN(9, "gpio9"),
66 PINCTRL_PIN(10, "gpio10"),
67 PINCTRL_PIN(11, "gpio11"),
68 PINCTRL_PIN(12, "gpio12"),
69 PINCTRL_PIN(13, "gpio13"),
70 PINCTRL_PIN(14, "gpio14"),
71 PINCTRL_PIN(15, "gpio15"),
72 PINCTRL_PIN(16, "agpio0"),
73 PINCTRL_PIN(17, "agpio1"),
74 PINCTRL_PIN(18, "agpio2"),
75 PINCTRL_PIN(19, "agpio3"),
76 PINCTRL_PIN(20, "agpio4"),
77 PINCTRL_PIN(21, "agpio5"),
78 PINCTRL_PIN(22, "agpio6"),
79 PINCTRL_PIN(23, "agpio7"),
82 struct stmfx_pinctrl {
85 struct pinctrl_dev *pctl_dev;
86 struct pinctrl_desc pctl_desc;
87 struct gpio_chip gpio_chip;
88 struct irq_chip irq_chip;
89 struct mutex lock; /* IRQ bus lock */
90 unsigned long gpio_valid_mask;
91 /* Cache of IRQ_GPI_* registers for bus_lock */
92 u8 irq_gpi_src[NR_GPIO_REGS];
93 u8 irq_gpi_type[NR_GPIO_REGS];
94 u8 irq_gpi_evt[NR_GPIO_REGS];
95 u8 irq_toggle_edge[NR_GPIO_REGS];
97 /* Backup of GPIO_* registers for suspend/resume */
98 u8 bkp_gpio_state[NR_GPIO_REGS];
99 u8 bkp_gpio_dir[NR_GPIO_REGS];
100 u8 bkp_gpio_type[NR_GPIO_REGS];
101 u8 bkp_gpio_pupd[NR_GPIO_REGS];
105 static int stmfx_gpio_get(struct gpio_chip *gc, unsigned int offset)
107 struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
108 u32 reg = STMFX_REG_GPIO_STATE + get_reg(offset);
109 u32 mask = get_mask(offset);
113 ret = regmap_read(pctl->stmfx->map, reg, &value);
115 return ret ? ret : !!(value & mask);
118 static void stmfx_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
120 struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
121 u32 reg = value ? STMFX_REG_GPO_SET : STMFX_REG_GPO_CLR;
122 u32 mask = get_mask(offset);
124 regmap_write_bits(pctl->stmfx->map, reg + get_reg(offset),
128 static int stmfx_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
130 struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
131 u32 reg = STMFX_REG_GPIO_DIR + get_reg(offset);
132 u32 mask = get_mask(offset);
136 ret = regmap_read(pctl->stmfx->map, reg, &val);
138 * On stmfx, gpio pins direction is (0)input, (1)output.
144 return GPIO_LINE_DIRECTION_OUT;
146 return GPIO_LINE_DIRECTION_IN;
149 static int stmfx_gpio_direction_input(struct gpio_chip *gc, unsigned int offset)
151 struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
152 u32 reg = STMFX_REG_GPIO_DIR + get_reg(offset);
153 u32 mask = get_mask(offset);
155 return regmap_write_bits(pctl->stmfx->map, reg, mask, 0);
158 static int stmfx_gpio_direction_output(struct gpio_chip *gc,
159 unsigned int offset, int value)
161 struct stmfx_pinctrl *pctl = gpiochip_get_data(gc);
162 u32 reg = STMFX_REG_GPIO_DIR + get_reg(offset);
163 u32 mask = get_mask(offset);
165 stmfx_gpio_set(gc, offset, value);
167 return regmap_write_bits(pctl->stmfx->map, reg, mask, mask);
170 static int stmfx_pinconf_get_pupd(struct stmfx_pinctrl *pctl,
173 u32 reg = STMFX_REG_GPIO_PUPD + get_reg(offset);
174 u32 pupd, mask = get_mask(offset);
177 ret = regmap_read(pctl->stmfx->map, reg, &pupd);
181 return !!(pupd & mask);
184 static int stmfx_pinconf_set_pupd(struct stmfx_pinctrl *pctl,
185 unsigned int offset, u32 pupd)
187 u32 reg = STMFX_REG_GPIO_PUPD + get_reg(offset);
188 u32 mask = get_mask(offset);
190 return regmap_write_bits(pctl->stmfx->map, reg, mask, pupd ? mask : 0);
193 static int stmfx_pinconf_get_type(struct stmfx_pinctrl *pctl,
196 u32 reg = STMFX_REG_GPIO_TYPE + get_reg(offset);
197 u32 type, mask = get_mask(offset);
200 ret = regmap_read(pctl->stmfx->map, reg, &type);
204 return !!(type & mask);
207 static int stmfx_pinconf_set_type(struct stmfx_pinctrl *pctl,
208 unsigned int offset, u32 type)
210 u32 reg = STMFX_REG_GPIO_TYPE + get_reg(offset);
211 u32 mask = get_mask(offset);
213 return regmap_write_bits(pctl->stmfx->map, reg, mask, type ? mask : 0);
216 static int stmfx_pinconf_get(struct pinctrl_dev *pctldev,
217 unsigned int pin, unsigned long *config)
219 struct stmfx_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
220 u32 param = pinconf_to_config_param(*config);
221 struct pinctrl_gpio_range *range;
223 int ret, dir, type, pupd;
225 range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
229 dir = stmfx_gpio_get_direction(&pctl->gpio_chip, pin);
234 * Currently the gpiolib IN is 1 and OUT is 0 but let's not count
235 * on it just to be on the safe side also in the future :)
237 dir = (dir == GPIO_LINE_DIRECTION_IN) ? 1 : 0;
239 type = stmfx_pinconf_get_type(pctl, pin);
242 pupd = stmfx_pinconf_get_pupd(pctl, pin);
247 case PIN_CONFIG_BIAS_DISABLE:
248 if ((!dir && (!type || !pupd)) || (dir && !type))
251 case PIN_CONFIG_BIAS_PULL_DOWN:
252 if (dir && type && !pupd)
255 case PIN_CONFIG_BIAS_PULL_UP:
259 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
260 if ((!dir && type) || (dir && !type))
263 case PIN_CONFIG_DRIVE_PUSH_PULL:
264 if ((!dir && !type) || (dir && type))
267 case PIN_CONFIG_OUTPUT:
271 ret = stmfx_gpio_get(&pctl->gpio_chip, pin);
281 *config = pinconf_to_config_packed(param, arg);
286 static int stmfx_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
287 unsigned long *configs, unsigned int num_configs)
289 struct stmfx_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
290 struct pinctrl_gpio_range *range;
291 enum pin_config_param param;
295 range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
297 dev_err(pctldev->dev, "pin %d is not available\n", pin);
301 for (i = 0; i < num_configs; i++) {
302 param = pinconf_to_config_param(configs[i]);
303 arg = pinconf_to_config_argument(configs[i]);
306 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
307 case PIN_CONFIG_BIAS_DISABLE:
308 case PIN_CONFIG_DRIVE_PUSH_PULL:
309 ret = stmfx_pinconf_set_type(pctl, pin, 0);
313 case PIN_CONFIG_BIAS_PULL_DOWN:
314 ret = stmfx_pinconf_set_type(pctl, pin, 1);
317 ret = stmfx_pinconf_set_pupd(pctl, pin, 0);
321 case PIN_CONFIG_BIAS_PULL_UP:
322 ret = stmfx_pinconf_set_type(pctl, pin, 1);
325 ret = stmfx_pinconf_set_pupd(pctl, pin, 1);
329 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
330 ret = stmfx_pinconf_set_type(pctl, pin, 1);
334 case PIN_CONFIG_OUTPUT:
335 ret = stmfx_gpio_direction_output(&pctl->gpio_chip,
348 static void stmfx_pinconf_dbg_show(struct pinctrl_dev *pctldev,
349 struct seq_file *s, unsigned int offset)
351 struct stmfx_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
352 struct pinctrl_gpio_range *range;
353 int dir, type, pupd, val;
355 range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, offset);
359 dir = stmfx_gpio_get_direction(&pctl->gpio_chip, offset);
362 type = stmfx_pinconf_get_type(pctl, offset);
365 pupd = stmfx_pinconf_get_pupd(pctl, offset);
368 val = stmfx_gpio_get(&pctl->gpio_chip, offset);
372 if (dir == GPIO_LINE_DIRECTION_OUT) {
373 seq_printf(s, "output %s ", val ? "high" : "low");
375 seq_printf(s, "open drain %s internal pull-up ",
376 pupd ? "with" : "without");
378 seq_puts(s, "push pull no pull ");
380 seq_printf(s, "input %s ", val ? "high" : "low");
382 seq_printf(s, "with internal pull-%s ",
383 pupd ? "up" : "down");
385 seq_printf(s, "%s ", pupd ? "floating" : "analog");
389 static const struct pinconf_ops stmfx_pinconf_ops = {
390 .pin_config_get = stmfx_pinconf_get,
391 .pin_config_set = stmfx_pinconf_set,
392 .pin_config_dbg_show = stmfx_pinconf_dbg_show,
395 static int stmfx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
400 static const char *stmfx_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
401 unsigned int selector)
406 static int stmfx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
407 unsigned int selector,
408 const unsigned int **pins,
409 unsigned int *num_pins)
414 static const struct pinctrl_ops stmfx_pinctrl_ops = {
415 .get_groups_count = stmfx_pinctrl_get_groups_count,
416 .get_group_name = stmfx_pinctrl_get_group_name,
417 .get_group_pins = stmfx_pinctrl_get_group_pins,
418 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
419 .dt_free_map = pinctrl_utils_free_map,
422 static void stmfx_pinctrl_irq_mask(struct irq_data *data)
424 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
425 struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
426 u32 reg = get_reg(data->hwirq);
427 u32 mask = get_mask(data->hwirq);
429 pctl->irq_gpi_src[reg] &= ~mask;
432 static void stmfx_pinctrl_irq_unmask(struct irq_data *data)
434 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
435 struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
436 u32 reg = get_reg(data->hwirq);
437 u32 mask = get_mask(data->hwirq);
439 pctl->irq_gpi_src[reg] |= mask;
442 static int stmfx_pinctrl_irq_set_type(struct irq_data *data, unsigned int type)
444 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
445 struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
446 u32 reg = get_reg(data->hwirq);
447 u32 mask = get_mask(data->hwirq);
449 if (type == IRQ_TYPE_NONE)
452 if (type & IRQ_TYPE_EDGE_BOTH) {
453 pctl->irq_gpi_evt[reg] |= mask;
454 irq_set_handler_locked(data, handle_edge_irq);
456 pctl->irq_gpi_evt[reg] &= ~mask;
457 irq_set_handler_locked(data, handle_level_irq);
460 if ((type & IRQ_TYPE_EDGE_RISING) || (type & IRQ_TYPE_LEVEL_HIGH))
461 pctl->irq_gpi_type[reg] |= mask;
463 pctl->irq_gpi_type[reg] &= ~mask;
466 * In case of (type & IRQ_TYPE_EDGE_BOTH), we need to know current
467 * GPIO value to set the right edge trigger. But in atomic context
468 * here we can't access registers over I2C. That's why (type &
469 * IRQ_TYPE_EDGE_BOTH) will be managed in .irq_sync_unlock.
472 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
473 pctl->irq_toggle_edge[reg] |= mask;
475 pctl->irq_toggle_edge[reg] &= mask;
480 static void stmfx_pinctrl_irq_bus_lock(struct irq_data *data)
482 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
483 struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
485 mutex_lock(&pctl->lock);
488 static void stmfx_pinctrl_irq_bus_sync_unlock(struct irq_data *data)
490 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
491 struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip);
492 u32 reg = get_reg(data->hwirq);
493 u32 mask = get_mask(data->hwirq);
496 * In case of IRQ_TYPE_EDGE_BOTH), read the current GPIO value
497 * (this couldn't be done in .irq_set_type because of atomic context)
498 * to set the right irq trigger type.
500 if (pctl->irq_toggle_edge[reg] & mask) {
501 if (stmfx_gpio_get(gpio_chip, data->hwirq))
502 pctl->irq_gpi_type[reg] &= ~mask;
504 pctl->irq_gpi_type[reg] |= mask;
507 regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_EVT,
508 pctl->irq_gpi_evt, NR_GPIO_REGS);
509 regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_TYPE,
510 pctl->irq_gpi_type, NR_GPIO_REGS);
511 regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_SRC,
512 pctl->irq_gpi_src, NR_GPIO_REGS);
514 mutex_unlock(&pctl->lock);
517 static int stmfx_gpio_irq_request_resources(struct irq_data *data)
519 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
522 ret = stmfx_gpio_direction_input(gpio_chip, data->hwirq);
526 return gpiochip_reqres_irq(gpio_chip, data->hwirq);
529 static void stmfx_gpio_irq_release_resources(struct irq_data *data)
531 struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data);
533 return gpiochip_relres_irq(gpio_chip, data->hwirq);
536 static void stmfx_pinctrl_irq_toggle_trigger(struct stmfx_pinctrl *pctl,
539 u32 reg = get_reg(offset);
540 u32 mask = get_mask(offset);
543 if (!(pctl->irq_toggle_edge[reg] & mask))
546 val = stmfx_gpio_get(&pctl->gpio_chip, offset);
551 pctl->irq_gpi_type[reg] &= mask;
552 regmap_write_bits(pctl->stmfx->map,
553 STMFX_REG_IRQ_GPI_TYPE + reg,
557 pctl->irq_gpi_type[reg] |= mask;
558 regmap_write_bits(pctl->stmfx->map,
559 STMFX_REG_IRQ_GPI_TYPE + reg,
564 static irqreturn_t stmfx_pinctrl_irq_thread_fn(int irq, void *dev_id)
566 struct stmfx_pinctrl *pctl = (struct stmfx_pinctrl *)dev_id;
567 struct gpio_chip *gc = &pctl->gpio_chip;
568 u8 pending[NR_GPIO_REGS];
569 u8 src[NR_GPIO_REGS] = {0, 0, 0};
570 unsigned long n, status;
573 ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_IRQ_GPI_PENDING,
574 &pending, NR_GPIO_REGS);
578 regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_SRC,
581 BUILD_BUG_ON(NR_GPIO_REGS > sizeof(status));
582 for (i = 0, status = 0; i < NR_GPIO_REGS; i++)
583 status |= (unsigned long)pending[i] << (i * 8);
584 for_each_set_bit(n, &status, gc->ngpio) {
585 handle_nested_irq(irq_find_mapping(gc->irq.domain, n));
586 stmfx_pinctrl_irq_toggle_trigger(pctl, n);
589 regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_SRC,
590 pctl->irq_gpi_src, NR_GPIO_REGS);
595 static int stmfx_pinctrl_gpio_function_enable(struct stmfx_pinctrl *pctl)
597 struct pinctrl_gpio_range *gpio_range;
598 struct pinctrl_dev *pctl_dev = pctl->pctl_dev;
599 u32 func = STMFX_FUNC_GPIO;
601 pctl->gpio_valid_mask = GENMASK(15, 0);
603 gpio_range = pinctrl_find_gpio_range_from_pin(pctl_dev, 16);
605 func |= STMFX_FUNC_ALTGPIO_LOW;
606 pctl->gpio_valid_mask |= GENMASK(19, 16);
609 gpio_range = pinctrl_find_gpio_range_from_pin(pctl_dev, 20);
611 func |= STMFX_FUNC_ALTGPIO_HIGH;
612 pctl->gpio_valid_mask |= GENMASK(23, 20);
615 return stmfx_function_enable(pctl->stmfx, func);
618 static int stmfx_pinctrl_probe(struct platform_device *pdev)
620 struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);
621 struct device_node *np = pdev->dev.of_node;
622 struct stmfx_pinctrl *pctl;
623 struct gpio_irq_chip *girq;
626 pctl = devm_kzalloc(stmfx->dev, sizeof(*pctl), GFP_KERNEL);
630 platform_set_drvdata(pdev, pctl);
632 pctl->dev = &pdev->dev;
635 if (!of_find_property(np, "gpio-ranges", NULL)) {
636 dev_err(pctl->dev, "missing required gpio-ranges property\n");
640 irq = platform_get_irq(pdev, 0);
644 mutex_init(&pctl->lock);
646 /* Register pin controller */
647 pctl->pctl_desc.name = "stmfx-pinctrl";
648 pctl->pctl_desc.pctlops = &stmfx_pinctrl_ops;
649 pctl->pctl_desc.confops = &stmfx_pinconf_ops;
650 pctl->pctl_desc.pins = stmfx_pins;
651 pctl->pctl_desc.npins = ARRAY_SIZE(stmfx_pins);
652 pctl->pctl_desc.owner = THIS_MODULE;
653 pctl->pctl_desc.link_consumers = true;
655 ret = devm_pinctrl_register_and_init(pctl->dev, &pctl->pctl_desc,
656 pctl, &pctl->pctl_dev);
658 dev_err(pctl->dev, "pinctrl registration failed\n");
662 ret = pinctrl_enable(pctl->pctl_dev);
664 dev_err(pctl->dev, "pinctrl enable failed\n");
668 /* Register gpio controller */
669 pctl->gpio_chip.label = "stmfx-gpio";
670 pctl->gpio_chip.parent = pctl->dev;
671 pctl->gpio_chip.get_direction = stmfx_gpio_get_direction;
672 pctl->gpio_chip.direction_input = stmfx_gpio_direction_input;
673 pctl->gpio_chip.direction_output = stmfx_gpio_direction_output;
674 pctl->gpio_chip.get = stmfx_gpio_get;
675 pctl->gpio_chip.set = stmfx_gpio_set;
676 pctl->gpio_chip.set_config = gpiochip_generic_config;
677 pctl->gpio_chip.base = -1;
678 pctl->gpio_chip.ngpio = pctl->pctl_desc.npins;
679 pctl->gpio_chip.can_sleep = true;
681 pctl->irq_chip.name = dev_name(pctl->dev);
682 pctl->irq_chip.irq_mask = stmfx_pinctrl_irq_mask;
683 pctl->irq_chip.irq_unmask = stmfx_pinctrl_irq_unmask;
684 pctl->irq_chip.irq_set_type = stmfx_pinctrl_irq_set_type;
685 pctl->irq_chip.irq_bus_lock = stmfx_pinctrl_irq_bus_lock;
686 pctl->irq_chip.irq_bus_sync_unlock = stmfx_pinctrl_irq_bus_sync_unlock;
687 pctl->irq_chip.irq_request_resources = stmfx_gpio_irq_request_resources;
688 pctl->irq_chip.irq_release_resources = stmfx_gpio_irq_release_resources;
690 girq = &pctl->gpio_chip.irq;
691 girq->chip = &pctl->irq_chip;
692 /* This will let us handle the parent IRQ in the driver */
693 girq->parent_handler = NULL;
694 girq->num_parents = 0;
695 girq->parents = NULL;
696 girq->default_type = IRQ_TYPE_NONE;
697 girq->handler = handle_bad_irq;
698 girq->threaded = true;
700 ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl);
702 dev_err(pctl->dev, "gpio_chip registration failed\n");
706 ret = stmfx_pinctrl_gpio_function_enable(pctl);
710 ret = devm_request_threaded_irq(pctl->dev, irq, NULL,
711 stmfx_pinctrl_irq_thread_fn,
713 pctl->irq_chip.name, pctl);
715 dev_err(pctl->dev, "cannot request irq%d\n", irq);
720 "%ld GPIOs available\n", hweight_long(pctl->gpio_valid_mask));
725 static int stmfx_pinctrl_remove(struct platform_device *pdev)
727 struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);
729 return stmfx_function_disable(stmfx,
731 STMFX_FUNC_ALTGPIO_LOW |
732 STMFX_FUNC_ALTGPIO_HIGH);
735 #ifdef CONFIG_PM_SLEEP
736 static int stmfx_pinctrl_backup_regs(struct stmfx_pinctrl *pctl)
740 ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_STATE,
741 &pctl->bkp_gpio_state, NR_GPIO_REGS);
744 ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_DIR,
745 &pctl->bkp_gpio_dir, NR_GPIO_REGS);
748 ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_TYPE,
749 &pctl->bkp_gpio_type, NR_GPIO_REGS);
752 ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_PUPD,
753 &pctl->bkp_gpio_pupd, NR_GPIO_REGS);
760 static int stmfx_pinctrl_restore_regs(struct stmfx_pinctrl *pctl)
764 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPIO_DIR,
765 pctl->bkp_gpio_dir, NR_GPIO_REGS);
768 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPIO_TYPE,
769 pctl->bkp_gpio_type, NR_GPIO_REGS);
772 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPIO_PUPD,
773 pctl->bkp_gpio_pupd, NR_GPIO_REGS);
776 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPO_SET,
777 pctl->bkp_gpio_state, NR_GPIO_REGS);
780 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_EVT,
781 pctl->irq_gpi_evt, NR_GPIO_REGS);
784 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_TYPE,
785 pctl->irq_gpi_type, NR_GPIO_REGS);
788 ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_SRC,
789 pctl->irq_gpi_src, NR_GPIO_REGS);
796 static int stmfx_pinctrl_suspend(struct device *dev)
798 struct stmfx_pinctrl *pctl = dev_get_drvdata(dev);
801 ret = stmfx_pinctrl_backup_regs(pctl);
803 dev_err(pctl->dev, "registers backup failure\n");
810 static int stmfx_pinctrl_resume(struct device *dev)
812 struct stmfx_pinctrl *pctl = dev_get_drvdata(dev);
815 ret = stmfx_pinctrl_restore_regs(pctl);
817 dev_err(pctl->dev, "registers restoration failure\n");
825 static SIMPLE_DEV_PM_OPS(stmfx_pinctrl_dev_pm_ops,
826 stmfx_pinctrl_suspend, stmfx_pinctrl_resume);
828 static const struct of_device_id stmfx_pinctrl_of_match[] = {
829 { .compatible = "st,stmfx-0300-pinctrl", },
832 MODULE_DEVICE_TABLE(of, stmfx_pinctrl_of_match);
834 static struct platform_driver stmfx_pinctrl_driver = {
836 .name = "stmfx-pinctrl",
837 .of_match_table = stmfx_pinctrl_of_match,
838 .pm = &stmfx_pinctrl_dev_pm_ops,
840 .probe = stmfx_pinctrl_probe,
841 .remove = stmfx_pinctrl_remove,
843 module_platform_driver(stmfx_pinctrl_driver);
845 MODULE_DESCRIPTION("STMFX pinctrl/GPIO driver");
847 MODULE_LICENSE("GPL v2");