From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/gpio/gpio-bd9571mwv.c | 130 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 drivers/gpio/gpio-bd9571mwv.c (limited to 'drivers/gpio/gpio-bd9571mwv.c') diff --git a/drivers/gpio/gpio-bd9571mwv.c b/drivers/gpio/gpio-bd9571mwv.c new file mode 100644 index 0000000000..9a4d55f703 --- /dev/null +++ b/drivers/gpio/gpio-bd9571mwv.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ROHM BD9571MWV-M and BD9574MWF-M GPIO driver + * + * Copyright (C) 2017 Marek Vasut + * + * Based on the TPS65086 driver + * + * NOTE: Interrupts are not supported yet. + */ + +#include +#include +#include +#include + +#include + +struct bd9571mwv_gpio { + struct regmap *regmap; + struct gpio_chip chip; +}; + +static int bd9571mwv_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip); + int ret, val; + + ret = regmap_read(gpio->regmap, BD9571MWV_GPIO_DIR, &val); + if (ret < 0) + return ret; + if (val & BIT(offset)) + return GPIO_LINE_DIRECTION_IN; + + return GPIO_LINE_DIRECTION_OUT; +} + +static int bd9571mwv_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip); + + regmap_update_bits(gpio->regmap, BD9571MWV_GPIO_DIR, BIT(offset), 0); + + return 0; +} + +static int bd9571mwv_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip); + + /* Set the initial value */ + regmap_update_bits(gpio->regmap, BD9571MWV_GPIO_OUT, + BIT(offset), value ? BIT(offset) : 0); + regmap_update_bits(gpio->regmap, BD9571MWV_GPIO_DIR, + BIT(offset), BIT(offset)); + + return 0; +} + +static int bd9571mwv_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip); + int ret, val; + + ret = regmap_read(gpio->regmap, BD9571MWV_GPIO_IN, &val); + if (ret < 0) + return ret; + + return val & BIT(offset); +} + +static void bd9571mwv_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip); + + regmap_update_bits(gpio->regmap, BD9571MWV_GPIO_OUT, + BIT(offset), value ? BIT(offset) : 0); +} + +static const struct gpio_chip template_chip = { + .label = "bd9571mwv-gpio", + .owner = THIS_MODULE, + .get_direction = bd9571mwv_gpio_get_direction, + .direction_input = bd9571mwv_gpio_direction_input, + .direction_output = bd9571mwv_gpio_direction_output, + .get = bd9571mwv_gpio_get, + .set = bd9571mwv_gpio_set, + .base = -1, + .ngpio = 2, + .can_sleep = true, +}; + +static int bd9571mwv_gpio_probe(struct platform_device *pdev) +{ + struct bd9571mwv_gpio *gpio; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + gpio->regmap = dev_get_regmap(pdev->dev.parent, NULL); + gpio->chip = template_chip; + gpio->chip.parent = pdev->dev.parent; + + return devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio); +} + +static const struct platform_device_id bd9571mwv_gpio_id_table[] = { + { "bd9571mwv-gpio", ROHM_CHIP_TYPE_BD9571 }, + { "bd9574mwf-gpio", ROHM_CHIP_TYPE_BD9574 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, bd9571mwv_gpio_id_table); + +static struct platform_driver bd9571mwv_gpio_driver = { + .driver = { + .name = "bd9571mwv-gpio", + }, + .probe = bd9571mwv_gpio_probe, + .id_table = bd9571mwv_gpio_id_table, +}; +module_platform_driver(bd9571mwv_gpio_driver); + +MODULE_AUTHOR("Marek Vasut "); +MODULE_DESCRIPTION("BD9571MWV GPIO driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3