mirror of
https://github.com/torvalds/linux
synced 2024-07-21 10:41:44 +00:00
e91d0f05e6
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Romain Perier <romain.perier@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019, Linaro Limited
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/gpio/driver.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#define WCD_PIN_MASK(p) BIT(p)
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#define WCD_REG_DIR_CTL_OFFSET 0x42
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#define WCD_REG_VAL_CTL_OFFSET 0x43
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#define WCD934X_NPINS 5
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struct wcd_gpio_data {
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struct regmap *map;
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struct gpio_chip chip;
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};
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static int wcd_gpio_get_direction(struct gpio_chip *chip, unsigned int pin)
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{
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struct wcd_gpio_data *data = gpiochip_get_data(chip);
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unsigned int value;
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int ret;
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ret = regmap_read(data->map, WCD_REG_DIR_CTL_OFFSET, &value);
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if (ret < 0)
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return ret;
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if (value & WCD_PIN_MASK(pin))
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return GPIO_LINE_DIRECTION_OUT;
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return GPIO_LINE_DIRECTION_IN;
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}
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static int wcd_gpio_direction_input(struct gpio_chip *chip, unsigned int pin)
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{
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struct wcd_gpio_data *data = gpiochip_get_data(chip);
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return regmap_update_bits(data->map, WCD_REG_DIR_CTL_OFFSET,
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WCD_PIN_MASK(pin), 0);
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}
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static int wcd_gpio_direction_output(struct gpio_chip *chip, unsigned int pin,
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int val)
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{
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struct wcd_gpio_data *data = gpiochip_get_data(chip);
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regmap_update_bits(data->map, WCD_REG_DIR_CTL_OFFSET,
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WCD_PIN_MASK(pin), WCD_PIN_MASK(pin));
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return regmap_update_bits(data->map, WCD_REG_VAL_CTL_OFFSET,
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WCD_PIN_MASK(pin),
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val ? WCD_PIN_MASK(pin) : 0);
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}
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static int wcd_gpio_get(struct gpio_chip *chip, unsigned int pin)
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{
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struct wcd_gpio_data *data = gpiochip_get_data(chip);
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unsigned int value;
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regmap_read(data->map, WCD_REG_VAL_CTL_OFFSET, &value);
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return !!(value & WCD_PIN_MASK(pin));
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}
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static void wcd_gpio_set(struct gpio_chip *chip, unsigned int pin, int val)
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{
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struct wcd_gpio_data *data = gpiochip_get_data(chip);
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regmap_update_bits(data->map, WCD_REG_VAL_CTL_OFFSET,
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WCD_PIN_MASK(pin), val ? WCD_PIN_MASK(pin) : 0);
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}
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static int wcd_gpio_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct wcd_gpio_data *data;
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struct gpio_chip *chip;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->map = dev_get_regmap(dev->parent, NULL);
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if (!data->map) {
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dev_err(dev, "%s: failed to get regmap\n", __func__);
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return -EINVAL;
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}
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chip = &data->chip;
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chip->direction_input = wcd_gpio_direction_input;
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chip->direction_output = wcd_gpio_direction_output;
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chip->get_direction = wcd_gpio_get_direction;
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chip->get = wcd_gpio_get;
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chip->set = wcd_gpio_set;
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chip->parent = dev;
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chip->base = -1;
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chip->ngpio = WCD934X_NPINS;
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chip->label = dev_name(dev);
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chip->can_sleep = false;
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return devm_gpiochip_add_data(dev, chip, data);
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}
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static const struct of_device_id wcd_gpio_of_match[] = {
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{ .compatible = "qcom,wcd9340-gpio" },
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{ .compatible = "qcom,wcd9341-gpio" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, wcd_gpio_of_match);
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static struct platform_driver wcd_gpio_driver = {
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.driver = {
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.name = "wcd934x-gpio",
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.of_match_table = wcd_gpio_of_match,
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},
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.probe = wcd_gpio_probe,
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};
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module_platform_driver(wcd_gpio_driver);
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MODULE_DESCRIPTION("Qualcomm Technologies, Inc WCD GPIO control driver");
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MODULE_LICENSE("GPL v2");
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