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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2015-2023 Texas Instruments Incorporated - https://www.ti.com/4 * Andrew Davis <afd@ti.com>5 *6 * Based on the TPS65912 driver7 */8 9#include <linux/gpio/driver.h>10#include <linux/module.h>11#include <linux/platform_device.h>12 13#include <linux/mfd/tps65086.h>14 15struct tps65086_gpio {16 struct gpio_chip chip;17 struct tps65086 *tps;18};19 20static int tps65086_gpio_get_direction(struct gpio_chip *chip,21 unsigned offset)22{23 /* This device is output only */24 return GPIO_LINE_DIRECTION_OUT;25}26 27static int tps65086_gpio_direction_input(struct gpio_chip *chip,28 unsigned offset)29{30 /* This device is output only */31 return -EINVAL;32}33 34static int tps65086_gpio_direction_output(struct gpio_chip *chip,35 unsigned offset, int value)36{37 struct tps65086_gpio *gpio = gpiochip_get_data(chip);38 39 /* Set the initial value */40 regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,41 BIT(4 + offset), value ? BIT(4 + offset) : 0);42 43 return 0;44}45 46static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset)47{48 struct tps65086_gpio *gpio = gpiochip_get_data(chip);49 int ret, val;50 51 ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val);52 if (ret < 0)53 return ret;54 55 return val & BIT(4 + offset);56}57 58static void tps65086_gpio_set(struct gpio_chip *chip, unsigned offset,59 int value)60{61 struct tps65086_gpio *gpio = gpiochip_get_data(chip);62 63 regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,64 BIT(4 + offset), value ? BIT(4 + offset) : 0);65}66 67static const struct gpio_chip template_chip = {68 .label = "tps65086-gpio",69 .owner = THIS_MODULE,70 .get_direction = tps65086_gpio_get_direction,71 .direction_input = tps65086_gpio_direction_input,72 .direction_output = tps65086_gpio_direction_output,73 .get = tps65086_gpio_get,74 .set = tps65086_gpio_set,75 .base = -1,76 .ngpio = 4,77 .can_sleep = true,78};79 80static int tps65086_gpio_probe(struct platform_device *pdev)81{82 struct tps65086_gpio *gpio;83 84 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);85 if (!gpio)86 return -ENOMEM;87 88 gpio->tps = dev_get_drvdata(pdev->dev.parent);89 gpio->chip = template_chip;90 gpio->chip.parent = gpio->tps->dev;91 92 return devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);93}94 95static const struct platform_device_id tps65086_gpio_id_table[] = {96 { "tps65086-gpio", },97 { /* sentinel */ }98};99MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table);100 101static struct platform_driver tps65086_gpio_driver = {102 .driver = {103 .name = "tps65086-gpio",104 },105 .probe = tps65086_gpio_probe,106 .id_table = tps65086_gpio_id_table,107};108module_platform_driver(tps65086_gpio_driver);109 110MODULE_AUTHOR("Andrew Davis <afd@ti.com>");111MODULE_DESCRIPTION("TPS65086 GPIO driver");112MODULE_LICENSE("GPL v2");113