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131 lines
3.3 KiB
131 lines
3.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* GPIO driver for TI TPS65912x PMICs |
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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 Arizona GPIO driver and the previous TPS65912 driver by |
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* Margarita Olaya Cabrera <[email protected]> |
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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/tps65912.h> |
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struct tps65912_gpio { |
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struct gpio_chip gpio_chip; |
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struct tps65912 *tps; |
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}; |
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static int tps65912_gpio_get_direction(struct gpio_chip *gc, |
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unsigned offset) |
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{ |
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struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
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int ret, val; |
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ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val); |
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if (ret) |
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return ret; |
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if (val & GPIO_CFG_MASK) |
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return GPIO_LINE_DIRECTION_OUT; |
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else |
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return GPIO_LINE_DIRECTION_IN; |
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} |
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static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset) |
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{ |
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struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
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return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
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GPIO_CFG_MASK, 0); |
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} |
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static int tps65912_gpio_direction_output(struct gpio_chip *gc, |
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unsigned offset, int value) |
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{ |
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struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
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/* Set the initial value */ |
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regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
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GPIO_SET_MASK, value ? GPIO_SET_MASK : 0); |
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return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
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GPIO_CFG_MASK, GPIO_CFG_MASK); |
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} |
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static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset) |
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{ |
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struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
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int ret, val; |
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ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val); |
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if (ret) |
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return ret; |
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if (val & GPIO_STS_MASK) |
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return 1; |
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return 0; |
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} |
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static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset, |
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int value) |
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{ |
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struct tps65912_gpio *gpio = gpiochip_get_data(gc); |
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regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset, |
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GPIO_SET_MASK, value ? GPIO_SET_MASK : 0); |
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} |
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static const struct gpio_chip template_chip = { |
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.label = "tps65912-gpio", |
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.owner = THIS_MODULE, |
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.get_direction = tps65912_gpio_get_direction, |
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.direction_input = tps65912_gpio_direction_input, |
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.direction_output = tps65912_gpio_direction_output, |
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.get = tps65912_gpio_get, |
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.set = tps65912_gpio_set, |
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.base = -1, |
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.ngpio = 5, |
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.can_sleep = true, |
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}; |
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static int tps65912_gpio_probe(struct platform_device *pdev) |
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{ |
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struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent); |
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struct tps65912_gpio *gpio; |
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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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gpio->tps = dev_get_drvdata(pdev->dev.parent); |
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gpio->gpio_chip = template_chip; |
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gpio->gpio_chip.parent = tps->dev; |
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return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, gpio); |
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} |
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static const struct platform_device_id tps65912_gpio_id_table[] = { |
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{ "tps65912-gpio", }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table); |
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static struct platform_driver tps65912_gpio_driver = { |
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.driver = { |
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.name = "tps65912-gpio", |
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}, |
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.probe = tps65912_gpio_probe, |
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.id_table = tps65912_gpio_id_table, |
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}; |
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module_platform_driver(tps65912_gpio_driver); |
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MODULE_AUTHOR("Andrew F. Davis <[email protected]>"); |
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MODULE_DESCRIPTION("TPS65912 GPIO driver"); |
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MODULE_LICENSE("GPL v2");
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