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131 lines
3.0 KiB
131 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ |
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* Andrew F. Davis <[email protected]> |
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* |
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* Based on the TPS65912 driver |
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*/ |
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#include <linux/gpio/driver.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/mfd/tps65086.h> |
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struct tps65086_gpio { |
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struct gpio_chip chip; |
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struct tps65086 *tps; |
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}; |
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static int tps65086_gpio_get_direction(struct gpio_chip *chip, |
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unsigned offset) |
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{ |
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/* This device is output only */ |
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return GPIO_LINE_DIRECTION_OUT; |
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} |
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static int tps65086_gpio_direction_input(struct gpio_chip *chip, |
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unsigned offset) |
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{ |
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/* This device is output only */ |
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return -EINVAL; |
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} |
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static int tps65086_gpio_direction_output(struct gpio_chip *chip, |
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unsigned offset, int value) |
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{ |
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struct tps65086_gpio *gpio = gpiochip_get_data(chip); |
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/* Set the initial value */ |
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regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL, |
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BIT(4 + offset), value ? BIT(4 + offset) : 0); |
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return 0; |
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} |
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static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset) |
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{ |
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struct tps65086_gpio *gpio = gpiochip_get_data(chip); |
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int ret, val; |
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ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val); |
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if (ret < 0) |
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return ret; |
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return val & BIT(4 + offset); |
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} |
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static void tps65086_gpio_set(struct gpio_chip *chip, unsigned offset, |
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int value) |
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{ |
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struct tps65086_gpio *gpio = gpiochip_get_data(chip); |
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regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL, |
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BIT(4 + offset), value ? BIT(4 + offset) : 0); |
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} |
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static const struct gpio_chip template_chip = { |
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.label = "tps65086-gpio", |
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.owner = THIS_MODULE, |
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.get_direction = tps65086_gpio_get_direction, |
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.direction_input = tps65086_gpio_direction_input, |
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.direction_output = tps65086_gpio_direction_output, |
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.get = tps65086_gpio_get, |
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.set = tps65086_gpio_set, |
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.base = -1, |
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.ngpio = 4, |
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.can_sleep = true, |
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}; |
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static int tps65086_gpio_probe(struct platform_device *pdev) |
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{ |
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struct tps65086_gpio *gpio; |
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int ret; |
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gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); |
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if (!gpio) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, gpio); |
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gpio->tps = dev_get_drvdata(pdev->dev.parent); |
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gpio->chip = template_chip; |
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gpio->chip.parent = gpio->tps->dev; |
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ret = gpiochip_add_data(&gpio->chip, gpio); |
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if (ret < 0) { |
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dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); |
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return ret; |
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} |
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return 0; |
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} |
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static int tps65086_gpio_remove(struct platform_device *pdev) |
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{ |
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struct tps65086_gpio *gpio = platform_get_drvdata(pdev); |
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gpiochip_remove(&gpio->chip); |
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return 0; |
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} |
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static const struct platform_device_id tps65086_gpio_id_table[] = { |
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{ "tps65086-gpio", }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table); |
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static struct platform_driver tps65086_gpio_driver = { |
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.driver = { |
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.name = "tps65086-gpio", |
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}, |
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.probe = tps65086_gpio_probe, |
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.remove = tps65086_gpio_remove, |
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.id_table = tps65086_gpio_id_table, |
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}; |
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module_platform_driver(tps65086_gpio_driver); |
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MODULE_AUTHOR("Andrew F. Davis <[email protected]>"); |
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MODULE_DESCRIPTION("TPS65086 GPIO driver"); |
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MODULE_LICENSE("GPL v2");
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