Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Srinivas Kandagatla | 561 | 95.41% | 2 | 50.00% |
Axel Lin | 27 | 4.59% | 2 | 50.00% |
Total | 588 | 4 |
// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019, Linaro Limited #include <linux/module.h> #include <linux/gpio/driver.h> #include <linux/regmap.h> #include <linux/slab.h> #include <linux/of_device.h> #define WCD_PIN_MASK(p) BIT(p) #define WCD_REG_DIR_CTL_OFFSET 0x42 #define WCD_REG_VAL_CTL_OFFSET 0x43 #define WCD934X_NPINS 5 struct wcd_gpio_data { struct regmap *map; struct gpio_chip chip; }; static int wcd_gpio_get_direction(struct gpio_chip *chip, unsigned int pin) { struct wcd_gpio_data *data = gpiochip_get_data(chip); unsigned int value; int ret; ret = regmap_read(data->map, WCD_REG_DIR_CTL_OFFSET, &value); if (ret < 0) return ret; if (value & WCD_PIN_MASK(pin)) return GPIO_LINE_DIRECTION_OUT; return GPIO_LINE_DIRECTION_IN; } static int wcd_gpio_direction_input(struct gpio_chip *chip, unsigned int pin) { struct wcd_gpio_data *data = gpiochip_get_data(chip); return regmap_update_bits(data->map, WCD_REG_DIR_CTL_OFFSET, WCD_PIN_MASK(pin), 0); } static int wcd_gpio_direction_output(struct gpio_chip *chip, unsigned int pin, int val) { struct wcd_gpio_data *data = gpiochip_get_data(chip); regmap_update_bits(data->map, WCD_REG_DIR_CTL_OFFSET, WCD_PIN_MASK(pin), WCD_PIN_MASK(pin)); return regmap_update_bits(data->map, WCD_REG_VAL_CTL_OFFSET, WCD_PIN_MASK(pin), val ? WCD_PIN_MASK(pin) : 0); } static int wcd_gpio_get(struct gpio_chip *chip, unsigned int pin) { struct wcd_gpio_data *data = gpiochip_get_data(chip); unsigned int value; regmap_read(data->map, WCD_REG_VAL_CTL_OFFSET, &value); return !!(value & WCD_PIN_MASK(pin)); } static void wcd_gpio_set(struct gpio_chip *chip, unsigned int pin, int val) { struct wcd_gpio_data *data = gpiochip_get_data(chip); regmap_update_bits(data->map, WCD_REG_VAL_CTL_OFFSET, WCD_PIN_MASK(pin), val ? WCD_PIN_MASK(pin) : 0); } static int wcd_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct wcd_gpio_data *data; struct gpio_chip *chip; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->map = dev_get_regmap(dev->parent, NULL); if (!data->map) { dev_err(dev, "%s: failed to get regmap\n", __func__); return -EINVAL; } chip = &data->chip; chip->direction_input = wcd_gpio_direction_input; chip->direction_output = wcd_gpio_direction_output; chip->get_direction = wcd_gpio_get_direction; chip->get = wcd_gpio_get; chip->set = wcd_gpio_set; chip->parent = dev; chip->base = -1; chip->ngpio = WCD934X_NPINS; chip->label = dev_name(dev); chip->of_gpio_n_cells = 2; chip->can_sleep = false; return devm_gpiochip_add_data(dev, chip, data); } static const struct of_device_id wcd_gpio_of_match[] = { { .compatible = "qcom,wcd9340-gpio" }, { .compatible = "qcom,wcd9341-gpio" }, { } }; MODULE_DEVICE_TABLE(of, wcd_gpio_of_match); static struct platform_driver wcd_gpio_driver = { .driver = { .name = "wcd934x-gpio", .of_match_table = wcd_gpio_of_match, }, .probe = wcd_gpio_probe, }; module_platform_driver(wcd_gpio_driver); MODULE_DESCRIPTION("Qualcomm Technologies, Inc WCD GPIO control driver"); MODULE_LICENSE("GPL v2");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1