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1// SPDX-License-Identifier: GPL-2.0+2/*3 * TI TPS6591x GPIO driver4 *5 * Copyright 2010 Texas Instruments Inc.6 *7 * Author: Graeme Gregory <gg@slimlogic.co.uk>8 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>9 */10 11#include <linux/kernel.h>12#include <linux/init.h>13#include <linux/errno.h>14#include <linux/gpio/driver.h>15#include <linux/i2c.h>16#include <linux/platform_device.h>17#include <linux/mfd/tps65910.h>18#include <linux/of.h>19 20struct tps65910_gpio {21 struct gpio_chip gpio_chip;22 struct tps65910 *tps65910;23};24 25static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)26{27 struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);28 struct tps65910 *tps65910 = tps65910_gpio->tps65910;29 unsigned int val;30 31 regmap_read(tps65910->regmap, TPS65910_GPIO0 + offset, &val);32 33 if (val & GPIO_STS_MASK)34 return 1;35 36 return 0;37}38 39static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,40 int value)41{42 struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);43 struct tps65910 *tps65910 = tps65910_gpio->tps65910;44 45 if (value)46 regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,47 GPIO_SET_MASK);48 else49 regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,50 GPIO_SET_MASK);51}52 53static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,54 int value)55{56 struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);57 struct tps65910 *tps65910 = tps65910_gpio->tps65910;58 59 /* Set the initial value */60 tps65910_gpio_set(gc, offset, value);61 62 return regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,63 GPIO_CFG_MASK);64}65 66static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)67{68 struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);69 struct tps65910 *tps65910 = tps65910_gpio->tps65910;70 71 return regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,72 GPIO_CFG_MASK);73}74 75#ifdef CONFIG_OF76static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,77 struct tps65910 *tps65910, int chip_ngpio)78{79 struct tps65910_board *tps65910_board = tps65910->of_plat_data;80 unsigned int prop_array[TPS6591X_MAX_NUM_GPIO];81 int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO);82 int ret;83 int idx;84 85 tps65910_board->gpio_base = -1;86 ret = of_property_read_u32_array(tps65910->dev->of_node,87 "ti,en-gpio-sleep", prop_array, ngpio);88 if (ret < 0) {89 dev_dbg(dev, "ti,en-gpio-sleep not specified\n");90 return tps65910_board;91 }92 93 for (idx = 0; idx < ngpio; idx++)94 tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0);95 96 return tps65910_board;97}98#else99static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,100 struct tps65910 *tps65910, int chip_ngpio)101{102 return NULL;103}104#endif105 106static int tps65910_gpio_probe(struct platform_device *pdev)107{108 struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);109 struct tps65910_board *pdata = dev_get_platdata(tps65910->dev);110 struct tps65910_gpio *tps65910_gpio;111 int ret;112 int i;113 114 device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));115 116 tps65910_gpio = devm_kzalloc(&pdev->dev,117 sizeof(*tps65910_gpio), GFP_KERNEL);118 if (!tps65910_gpio)119 return -ENOMEM;120 121 tps65910_gpio->tps65910 = tps65910;122 123 tps65910_gpio->gpio_chip.owner = THIS_MODULE;124 tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;125 126 switch (tps65910_chip_id(tps65910)) {127 case TPS65910:128 tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;129 break;130 case TPS65911:131 tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO;132 break;133 default:134 return -EINVAL;135 }136 tps65910_gpio->gpio_chip.can_sleep = true;137 tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input;138 tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output;139 tps65910_gpio->gpio_chip.set = tps65910_gpio_set;140 tps65910_gpio->gpio_chip.get = tps65910_gpio_get;141 tps65910_gpio->gpio_chip.parent = &pdev->dev;142 143 if (pdata && pdata->gpio_base)144 tps65910_gpio->gpio_chip.base = pdata->gpio_base;145 else146 tps65910_gpio->gpio_chip.base = -1;147 148 if (!pdata && tps65910->dev->of_node)149 pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910,150 tps65910_gpio->gpio_chip.ngpio);151 152 if (!pdata)153 goto skip_init;154 155 /* Configure sleep control for gpios if provided */156 for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) {157 if (!pdata->en_gpio_sleep[i])158 continue;159 160 ret = regmap_set_bits(tps65910->regmap,161 TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);162 if (ret < 0)163 dev_warn(tps65910->dev,164 "GPIO Sleep setting failed with err %d\n", ret);165 }166 167skip_init:168 return devm_gpiochip_add_data(&pdev->dev, &tps65910_gpio->gpio_chip,169 tps65910_gpio);170}171 172static struct platform_driver tps65910_gpio_driver = {173 .driver.name = "tps65910-gpio",174 .probe = tps65910_gpio_probe,175};176 177static int __init tps65910_gpio_init(void)178{179 return platform_driver_register(&tps65910_gpio_driver);180}181subsys_initcall(tps65910_gpio_init);182