1 // SPDX-License-Identifier: GPL-2.0-only
22 #include <linux/pinctrl/pinconf-generic.h>
23 #include <linux/pinctrl/pinconf.h>
24 #include <linux/pinctrl/pinctrl.h>
25 #include <linux/pinctrl/pinmux.h>
32  * HW needs at least 20uS for reset and at least 1-2uS to recover from
40 /* Port 0: P0_0...P0_7 - Port 1: P1_0...P1_7 */
58  * struct aw9523_irq - Interrupt controller structure
68  * struct aw9523 - Main driver structure
74  * @pctl: pinctrl handle for current device
78 struct aw9523 {  struct
141 	"gpio0", "gpio1", "gpio2", "gpio3",		/* 0-3 */
142 	"gpio4", "gpio5", "gpio6", "gpio7",		/* 4-7 */
143 	"gpio8", "gpio9", "gpio10", "gpio11",		/* 8-11 */
144 	"gpio12", "gpio13", "gpio14", "gpio15",		/* 11-15 */
176 	struct aw9523 *awi = pinctrl_dev_get_drvdata(pctl);  in aw9523_pmx_set_mux()
180 		return -EINVAL;  in aw9523_pmx_set_mux()
186 	mutex_lock(&awi->i2c_lock);  in aw9523_pmx_set_mux()
187 	ret = regmap_update_bits(awi->regmap, AW9523_REG_PORT_MODE(pin),  in aw9523_pmx_set_mux()
189 	mutex_unlock(&awi->i2c_lock);  in aw9523_pmx_set_mux()
222 		return -ENOTSUPP;  in aw9523_pcfg_param_to_reg()
232 	struct aw9523 *awi = pinctrl_dev_get_drvdata(pctldev);  in aw9523_pconf_get()
243 	mutex_lock(&awi->i2c_lock);  in aw9523_pconf_get()
244 	rc = regmap_read(awi->regmap, reg, &val);  in aw9523_pconf_get()
245 	mutex_unlock(&awi->i2c_lock);  in aw9523_pconf_get()
273 		return -ENOTSUPP;  in aw9523_pconf_get()
276 		return -EINVAL;  in aw9523_pconf_get()
286 	struct aw9523 *awi = pinctrl_dev_get_drvdata(pctldev);  in aw9523_pconf_set()
294 	mutex_lock(&awi->i2c_lock);  in aw9523_pconf_set()
306 			rc = regmap_update_bits(awi->regmap,  in aw9523_pconf_set()
325 			/* Open-Drain is supported only on port 0 */  in aw9523_pconf_set()
327 				rc = -ENOTSUPP;  in aw9523_pconf_set()
334 			/* Port 1 is always Push-Pull */  in aw9523_pconf_set()
344 			rc = -ENOTSUPP;  in aw9523_pconf_set()
348 		rc = regmap_update_bits(awi->regmap, reg, mask, val);  in aw9523_pconf_set()
353 	mutex_unlock(&awi->i2c_lock);  in aw9523_pconf_set()
364  * aw9523_get_pin_direction - Get pin direction
383  * aw9523_get_port_state - Get input or output state for entire port
416 		return -EINVAL;  in aw9523_gpio_irq_type()
421  * aw9523_irq_mask - Mask interrupt
429 	struct aw9523 *awi = gpiochip_get_data(irq_data_get_irq_chip_data(d));  in aw9523_irq_mask()
433 	regmap_update_bits(awi->regmap, AW9523_REG_INTR_DIS(hwirq),  in aw9523_irq_mask()
435 	gpiochip_disable_irq(&awi->gpio, hwirq);  in aw9523_irq_mask()
439  * aw9523_irq_unmask - Unmask interrupt
447 	struct aw9523 *awi = gpiochip_get_data(irq_data_get_irq_chip_data(d));  in aw9523_irq_unmask()
451 	gpiochip_enable_irq(&awi->gpio, hwirq);  in aw9523_irq_unmask()
452 	regmap_update_bits(awi->regmap, AW9523_REG_INTR_DIS(hwirq),  in aw9523_irq_unmask()
458 	struct aw9523 *awi = (struct aw9523 *)dev_id;  in aw9523_irq_thread_func()
465 		ret = regmap_read(awi->regmap,  in aw9523_irq_thread_func()
474 	changed_gpio = awi->irq->cached_gpio ^ val;  in aw9523_irq_thread_func()
475 	awi->irq->cached_gpio = val;  in aw9523_irq_thread_func()
483 	for_each_set_bit(n, &changed_gpio, awi->gpio.ngpio) {  in aw9523_irq_thread_func()
484 		tmp = irq_find_mapping(awi->gpio.irq.domain, n);  in aw9523_irq_thread_func()
494  * aw9523_irq_bus_lock - Grab lock for interrupt operation
499 	struct aw9523 *awi = gpiochip_get_data(irq_data_get_irq_chip_data(d));  in aw9523_irq_bus_lock()
501 	mutex_lock(&awi->irq->lock);  in aw9523_irq_bus_lock()
502 	regcache_cache_only(awi->regmap, true);  in aw9523_irq_bus_lock()
506  * aw9523_irq_bus_sync_unlock - Synchronize state and unlock
514 	struct aw9523 *awi = gpiochip_get_data(irq_data_get_irq_chip_data(d));  in aw9523_irq_bus_sync_unlock()
516 	regcache_cache_only(awi->regmap, false);  in aw9523_irq_bus_sync_unlock()
517 	regcache_sync(awi->regmap);  in aw9523_irq_bus_sync_unlock()
518 	mutex_unlock(&awi->irq->lock);  in aw9523_irq_bus_sync_unlock()
524 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_gpio_get_direction()
528 	mutex_lock(&awi->i2c_lock);  in aw9523_gpio_get_direction()
529 	ret = aw9523_get_pin_direction(awi->regmap, offset, regbit);  in aw9523_gpio_get_direction()
530 	mutex_unlock(&awi->i2c_lock);  in aw9523_gpio_get_direction()
537 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_gpio_get()
542 	mutex_lock(&awi->i2c_lock);  in aw9523_gpio_get()
543 	ret = aw9523_get_port_state(awi->regmap, offset, regbit, &val);  in aw9523_gpio_get()
544 	mutex_unlock(&awi->i2c_lock);  in aw9523_gpio_get()
552  * _aw9523_gpio_get_multiple - Get I/O state for an entire port
560 static int _aw9523_gpio_get_multiple(struct aw9523 *awi, u8 regbit,  in _aw9523_gpio_get_multiple()
567 	/* Registers are 8-bits wide */  in _aw9523_gpio_get_multiple()
568 	ret = regmap_read(awi->regmap, AW9523_REG_CONF_STATE(regbit), &dir_in);  in _aw9523_gpio_get_multiple()
575 		ret = regmap_read(awi->regmap, AW9523_REG_IN_STATE(regbit),  in _aw9523_gpio_get_multiple()
584 		ret = regmap_read(awi->regmap, AW9523_REG_OUT_STATE(regbit),  in _aw9523_gpio_get_multiple()
598 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_gpio_get_multiple()
602 	mutex_lock(&awi->i2c_lock);  in aw9523_gpio_get_multiple()
604 	/* Port 0 (gpio 0-7) */  in aw9523_gpio_get_multiple()
613 	/* Port 1 (gpio 8-15) */  in aw9523_gpio_get_multiple()
624 	mutex_unlock(&awi->i2c_lock);  in aw9523_gpio_get_multiple()
632 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_gpio_set_multiple()
642 	mutex_lock(&awi->i2c_lock);  in aw9523_gpio_set_multiple()
645 		ret = regmap_write_bits(awi->regmap, reg, mask_hi, bits_hi);  in aw9523_gpio_set_multiple()
651 		ret = regmap_write_bits(awi->regmap, reg, mask_lo, bits_lo);  in aw9523_gpio_set_multiple()
657 	mutex_unlock(&awi->i2c_lock);  in aw9523_gpio_set_multiple()
664 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_gpio_set()
668 	mutex_lock(&awi->i2c_lock);  in aw9523_gpio_set()
669 	ret = regmap_update_bits(awi->regmap, AW9523_REG_OUT_STATE(offset),  in aw9523_gpio_set()
671 	mutex_unlock(&awi->i2c_lock);  in aw9523_gpio_set()
679 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_direction_input()
683 	mutex_lock(&awi->i2c_lock);  in aw9523_direction_input()
684 	ret = regmap_update_bits(awi->regmap, AW9523_REG_CONF_STATE(offset),  in aw9523_direction_input()
686 	mutex_unlock(&awi->i2c_lock);  in aw9523_direction_input()
694 	struct aw9523 *awi = gpiochip_get_data(chip);  in aw9523_direction_output()
698 	mutex_lock(&awi->i2c_lock);  in aw9523_direction_output()
699 	ret = regmap_update_bits(awi->regmap, AW9523_REG_OUT_STATE(offset),  in aw9523_direction_output()
704 	ret = regmap_update_bits(awi->regmap, AW9523_REG_CONF_STATE(offset),  in aw9523_direction_output()
707 	mutex_unlock(&awi->i2c_lock);  in aw9523_direction_output()
711 static int aw9523_drive_reset_gpio(struct aw9523 *awi)  in aw9523_drive_reset_gpio()
722 	ret = regmap_write(awi->regmap, AW9523_REG_SOFT_RESET, 0);  in aw9523_drive_reset_gpio()
726 	dev_dbg(awi->dev, "Cannot execute soft reset: trying hard reset\n");  in aw9523_drive_reset_gpio()
727 	ret = gpiod_direction_output(awi->reset_gpio, 0);  in aw9523_drive_reset_gpio()
734 	ret = gpiod_direction_output(awi->reset_gpio, 1);  in aw9523_drive_reset_gpio()
743 	ret = regmap_read(awi->regmap, AW9523_REG_CHIPID, &chip_id);  in aw9523_drive_reset_gpio()
745 		dev_err(awi->dev, "Cannot read Chip ID: %d\n", ret);  in aw9523_drive_reset_gpio()
749 		dev_err(awi->dev, "Bad ChipID; read 0x%x, expected 0x%x\n",  in aw9523_drive_reset_gpio()
751 		return -EINVAL;  in aw9523_drive_reset_gpio()
757 static int aw9523_hw_reset(struct aw9523 *awi)  in aw9523_hw_reset()
766 		max_retries--;  in aw9523_hw_reset()
772 static int aw9523_init_gpiochip(struct aw9523 *awi, unsigned int npins)  in aw9523_init_gpiochip()
774 	struct device *dev = awi->dev;  in aw9523_init_gpiochip()
775 	struct gpio_chip *gc = &awi->gpio;  in aw9523_init_gpiochip()
777 	gc->label = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);  in aw9523_init_gpiochip()
778 	if (!gc->label)  in aw9523_init_gpiochip()
779 		return -ENOMEM;  in aw9523_init_gpiochip()
781 	gc->base = -1;  in aw9523_init_gpiochip()
782 	gc->ngpio = npins;  in aw9523_init_gpiochip()
783 	gc->get_direction = aw9523_gpio_get_direction;  in aw9523_init_gpiochip()
784 	gc->direction_input = aw9523_direction_input;  in aw9523_init_gpiochip()
785 	gc->direction_output = aw9523_direction_output;  in aw9523_init_gpiochip()
786 	gc->get = aw9523_gpio_get;  in aw9523_init_gpiochip()
787 	gc->get_multiple = aw9523_gpio_get_multiple;  in aw9523_init_gpiochip()
788 	gc->set = aw9523_gpio_set;  in aw9523_init_gpiochip()
789 	gc->set_multiple = aw9523_gpio_set_multiple;  in aw9523_init_gpiochip()
790 	gc->set_config = gpiochip_generic_config;  in aw9523_init_gpiochip()
791 	gc->parent = dev;  in aw9523_init_gpiochip()
792 	gc->owner = THIS_MODULE;  in aw9523_init_gpiochip()
793 	gc->can_sleep = true;  in aw9523_init_gpiochip()
799 	.name = "aw9523",
809 static int aw9523_init_irq(struct aw9523 *awi, int irq)  in aw9523_init_irq()
811 	struct device *dev = awi->dev;  in aw9523_init_irq()
815 	if (!device_property_read_bool(dev, "interrupt-controller"))  in aw9523_init_irq()
818 	awi->irq = devm_kzalloc(dev, sizeof(*awi->irq), GFP_KERNEL);  in aw9523_init_irq()
819 	if (!awi->irq)  in aw9523_init_irq()
820 		return -ENOMEM;  in aw9523_init_irq()
822 	mutex_init(&awi->irq->lock);  in aw9523_init_irq()
829 	girq = &awi->gpio.irq;  in aw9523_init_irq()
831 	girq->parent_handler = NULL;  in aw9523_init_irq()
832 	girq->num_parents = 0;  in aw9523_init_irq()
833 	girq->parents = NULL;  in aw9523_init_irq()
834 	girq->default_type = IRQ_TYPE_EDGE_BOTH;  in aw9523_init_irq()
835 	girq->handler = handle_simple_irq;  in aw9523_init_irq()
836 	girq->threaded = true;  in aw9523_init_irq()
893 static int aw9523_hw_init(struct aw9523 *awi)  in aw9523_hw_init()
900 	regcache_cache_bypass(awi->regmap, true);  in aw9523_hw_init()
905 		dev_err(awi->dev, "HW Reset failed: %d\n", ret);  in aw9523_hw_init()
917 	ret = regmap_write(awi->regmap, AW9523_REG_PORT_MODE(0), U8_MAX);  in aw9523_hw_init()
920 	ret = regmap_write(awi->regmap, AW9523_REG_PORT_MODE(p1_pin), U8_MAX);  in aw9523_hw_init()
924 	/* Set Open-Drain mode on Port 0 (Port 1 is always P-P) */  in aw9523_hw_init()
925 	ret = regmap_write(awi->regmap, AW9523_REG_GCR, 0);  in aw9523_hw_init()
930 	ret = regmap_write(awi->regmap, AW9523_REG_CONF_STATE(0), U8_MAX);  in aw9523_hw_init()
933 	ret = regmap_write(awi->regmap, AW9523_REG_CONF_STATE(p1_pin), U8_MAX);  in aw9523_hw_init()
938 	ret = regmap_write(awi->regmap, AW9523_REG_INTR_DIS(0), U8_MAX);  in aw9523_hw_init()
941 	ret = regmap_write(awi->regmap, AW9523_REG_INTR_DIS(p1_pin), U8_MAX);  in aw9523_hw_init()
945 	/* Clear setup-generated interrupts by performing a port state read */  in aw9523_hw_init()
946 	ret = aw9523_get_port_state(awi->regmap, 0, 0, &val);  in aw9523_hw_init()
949 	ret = aw9523_get_port_state(awi->regmap, p1_pin, 0, &val);  in aw9523_hw_init()
954 	regcache_cache_bypass(awi->regmap, false);  in aw9523_hw_init()
955 	return regmap_reinit_cache(awi->regmap, &aw9523_regmap);  in aw9523_hw_init()
960 	struct device *dev = &client->dev;  in aw9523_probe()
962 	struct aw9523 *awi;  in aw9523_probe()
967 		return -ENOMEM;  in aw9523_probe()
971 	awi->dev = dev;  in aw9523_probe()
972 	awi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in aw9523_probe()
973 	if (IS_ERR(awi->reset_gpio))  in aw9523_probe()
974 		return PTR_ERR(awi->reset_gpio);  in aw9523_probe()
975 	gpiod_set_consumer_name(awi->reset_gpio, "aw9523 reset");  in aw9523_probe()
977 	awi->regmap = devm_regmap_init_i2c(client, &aw9523_regmap);  in aw9523_probe()
978 	if (IS_ERR(awi->regmap))  in aw9523_probe()
979 		return PTR_ERR(awi->regmap);  in aw9523_probe()
981 	awi->vio_vreg = devm_regulator_get_enable_optional(dev, "vio");  in aw9523_probe()
982 	if (awi->vio_vreg && awi->vio_vreg != -ENODEV)  in aw9523_probe()
983 		return awi->vio_vreg;  in aw9523_probe()
985 	ret = devm_mutex_init(dev, &awi->i2c_lock);  in aw9523_probe()
989 	lockdep_set_subclass(&awi->i2c_lock, i2c_adapter_depth(client->adapter));  in aw9523_probe()
993 		return -ENOMEM;  in aw9523_probe()
999 	pdesc->name = dev_name(dev);  in aw9523_probe()
1000 	pdesc->owner = THIS_MODULE;  in aw9523_probe()
1001 	pdesc->pctlops = &aw9523_pinctrl_ops;  in aw9523_probe()
1002 	pdesc->pmxops  = &aw9523_pinmux_ops;  in aw9523_probe()
1003 	pdesc->confops = &aw9523_pinconf_ops;  in aw9523_probe()
1004 	pdesc->pins = aw9523_pins;  in aw9523_probe()
1005 	pdesc->npins = ARRAY_SIZE(aw9523_pins);  in aw9523_probe()
1007 	ret = aw9523_init_gpiochip(awi, pdesc->npins);  in aw9523_probe()
1011 	if (client->irq) {  in aw9523_probe()
1012 		ret = aw9523_init_irq(awi, client->irq);  in aw9523_probe()
1017 	awi->pctl = devm_pinctrl_register(dev, pdesc, awi);  in aw9523_probe()
1018 	if (IS_ERR(awi->pctl))  in aw9523_probe()
1019 		return dev_err_probe(dev, PTR_ERR(awi->pctl),  in aw9523_probe()
1020 				     "Cannot register pinctrl");  in aw9523_probe()
1022 	return devm_gpiochip_add_data(dev, &awi->gpio, awi);  in aw9523_probe()
1027 	struct aw9523 *awi = i2c_get_clientdata(client);  in aw9523_remove()
1035 	if (awi->vio_vreg == -ENODEV) {  in aw9523_remove()
1036 		mutex_lock(&awi->i2c_lock);  in aw9523_remove()
1038 		mutex_unlock(&awi->i2c_lock);  in aw9523_remove()
1049 	{ .compatible = "awinic,aw9523-pinctrl", },
1056 		.name = "aw9523-pinctrl",
1065 MODULE_DESCRIPTION("Awinic AW9523 I2C GPIO Expander driver");