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1// SPDX-License-Identifier: GPL-2.02/*3 * GPIO driver for TI TPS65912x PMICs4 *5 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/6 * Andrew F. Davis <afd@ti.com>7 *8 * Based on the Arizona GPIO driver and the previous TPS65912 driver by9 * Margarita Olaya Cabrera <magi@slimlogic.co.uk>10 */11 12#include <linux/gpio/driver.h>13#include <linux/module.h>14#include <linux/platform_device.h>15 16#include <linux/mfd/tps65912.h>17 18struct tps65912_gpio {19 struct gpio_chip gpio_chip;20 struct tps65912 *tps;21};22 23static int tps65912_gpio_get_direction(struct gpio_chip *gc,24 unsigned offset)25{26 struct tps65912_gpio *gpio = gpiochip_get_data(gc);27 28 int ret, val;29 30 ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);31 if (ret)32 return ret;33 34 if (val & GPIO_CFG_MASK)35 return GPIO_LINE_DIRECTION_OUT;36 else37 return GPIO_LINE_DIRECTION_IN;38}39 40static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)41{42 struct tps65912_gpio *gpio = gpiochip_get_data(gc);43 44 return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,45 GPIO_CFG_MASK, 0);46}47 48static int tps65912_gpio_direction_output(struct gpio_chip *gc,49 unsigned offset, int value)50{51 struct tps65912_gpio *gpio = gpiochip_get_data(gc);52 53 /* Set the initial value */54 regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,55 GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);56 57 return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,58 GPIO_CFG_MASK, GPIO_CFG_MASK);59}60 61static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)62{63 struct tps65912_gpio *gpio = gpiochip_get_data(gc);64 int ret, val;65 66 ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);67 if (ret)68 return ret;69 70 if (val & GPIO_STS_MASK)71 return 1;72 73 return 0;74}75 76static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,77 int value)78{79 struct tps65912_gpio *gpio = gpiochip_get_data(gc);80 81 regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,82 GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);83}84 85static const struct gpio_chip template_chip = {86 .label = "tps65912-gpio",87 .owner = THIS_MODULE,88 .get_direction = tps65912_gpio_get_direction,89 .direction_input = tps65912_gpio_direction_input,90 .direction_output = tps65912_gpio_direction_output,91 .get = tps65912_gpio_get,92 .set = tps65912_gpio_set,93 .base = -1,94 .ngpio = 5,95 .can_sleep = true,96};97 98static int tps65912_gpio_probe(struct platform_device *pdev)99{100 struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);101 struct tps65912_gpio *gpio;102 103 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);104 if (!gpio)105 return -ENOMEM;106 107 gpio->tps = dev_get_drvdata(pdev->dev.parent);108 gpio->gpio_chip = template_chip;109 gpio->gpio_chip.parent = tps->dev;110 111 return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, gpio);112}113 114static const struct platform_device_id tps65912_gpio_id_table[] = {115 { "tps65912-gpio", },116 { /* sentinel */ }117};118MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);119 120static struct platform_driver tps65912_gpio_driver = {121 .driver = {122 .name = "tps65912-gpio",123 },124 .probe = tps65912_gpio_probe,125 .id_table = tps65912_gpio_id_table,126};127module_platform_driver(tps65912_gpio_driver);128 129MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");130MODULE_DESCRIPTION("TPS65912 GPIO driver");131MODULE_LICENSE("GPL v2");132