Orange Pi5 kernel

/*
 * ROHM BD9571MWV-M GPIO driver
 *
 * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether expressed or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License version 2 for more details.
 *
 * Based on the TPS65086 driver
 *
 * NOTE: Interrupts are not supported yet.
 */
 
#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/platform_device.h>
 
#include <linux/mfd/bd9571mwv.h>
 
struct bd9571mwv_gpio {
<------>struct gpio_chip chip;
<------>struct bd9571mwv *bd;
};
 
static int bd9571mwv_gpio_get_direction(struct gpio_chip *chip,
<------><------><------><------>       unsigned int offset)
{
<------>struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
<------>int ret, val;
 
<------>ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_DIR, &val);
<------>if (ret < 0)
<------><------>return ret;
<------>if (val & BIT(offset))
<------><------>return GPIO_LINE_DIRECTION_IN;
 
<------>return GPIO_LINE_DIRECTION_OUT;
}
 
static int bd9571mwv_gpio_direction_input(struct gpio_chip *chip,
<------><------><------><------><------> unsigned int offset)
{
<------>struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
 
<------>regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_DIR,
<------><------><------>   BIT(offset), 0);
 
<------>return 0;
}
 
static int bd9571mwv_gpio_direction_output(struct gpio_chip *chip,
<------><------><------><------><------>  unsigned int offset, int value)
{
<------>struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
 
<------>/* Set the initial value */
<------>regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_OUT,
<------><------><------>   BIT(offset), value ? BIT(offset) : 0);
<------>regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_DIR,
<------><------><------>   BIT(offset), BIT(offset));
 
<------>return 0;
}
 
static int bd9571mwv_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
<------>struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
<------>int ret, val;
 
<------>ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_IN, &val);
<------>if (ret < 0)
<------><------>return ret;
 
<------>return val & BIT(offset);
}
 
static void bd9571mwv_gpio_set(struct gpio_chip *chip, unsigned int offset,
<------><------><------>      int value)
{
<------>struct bd9571mwv_gpio *gpio = gpiochip_get_data(chip);
 
<------>regmap_update_bits(gpio->bd->regmap, BD9571MWV_GPIO_OUT,
<------><------><------>   BIT(offset), value ? BIT(offset) : 0);
}
 
static const struct gpio_chip template_chip = {
<------>.label			= "bd9571mwv-gpio",
<------>.owner			= THIS_MODULE,
<------>.get_direction		= bd9571mwv_gpio_get_direction,
<------>.direction_input	= bd9571mwv_gpio_direction_input,
<------>.direction_output	= bd9571mwv_gpio_direction_output,
<------>.get			= bd9571mwv_gpio_get,
<------>.set			= bd9571mwv_gpio_set,
<------>.base			= -1,
<------>.ngpio			= 2,
<------>.can_sleep		= true,
};
 
static int bd9571mwv_gpio_probe(struct platform_device *pdev)
{
<------>struct bd9571mwv_gpio *gpio;
<------>int ret;
 
<------>gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
<------>if (!gpio)
<------><------>return -ENOMEM;
 
<------>platform_set_drvdata(pdev, gpio);
 
<------>gpio->bd = dev_get_drvdata(pdev->dev.parent);
<------>gpio->chip = template_chip;
<------>gpio->chip.parent = gpio->bd->dev;
 
<------>ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
<------>if (ret < 0) {
<------><------>dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
<------><------>return ret;
<------>}
 
<------>return 0;
}
 
static const struct platform_device_id bd9571mwv_gpio_id_table[] = {
<------>{ "bd9571mwv-gpio", },
<------>{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, bd9571mwv_gpio_id_table);
 
static struct platform_driver bd9571mwv_gpio_driver = {
<------>.driver = {
<------><------>.name = "bd9571mwv-gpio",
<------>},
<------>.probe = bd9571mwv_gpio_probe,
<------>.id_table = bd9571mwv_gpio_id_table,
};
module_platform_driver(bd9571mwv_gpio_driver);
 
MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
MODULE_DESCRIPTION("BD9571MWV GPIO driver");
MODULE_LICENSE("GPL v2");