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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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d9d87d90cc
The conversion of all GPIO drivers to using the .set_rv() and .set_multiple_rv() callbacks from struct gpio_chip (which - unlike their predecessors - return an integer and allow the controller drivers to indicate failures to users) is now complete and the legacy ones have been removed. Rename the new callbacks back to their original names in one sweeping change. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
// 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 <afd@ti.com>
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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 <magi@slimlogic.co.uk>
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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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int ret;
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/* Set the initial value */
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ret = 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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if (ret)
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return ret;
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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 int tps65912_gpio_set(struct gpio_chip *gc, unsigned int 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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return 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 <afd@ti.com>");
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MODULE_DESCRIPTION("TPS65912 GPIO driver");
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MODULE_LICENSE("GPL v2");
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