linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * GPIO driver for TI TPS65912x PMICs

 *

 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/

 *  Andrew F. Davis <afd@ti.com>

 *

 * Based on the Arizona GPIO driver and the previous TPS65912 driver by

 * Margarita Olaya Cabrera <magi@slimlogic.co.uk>

 */

​

#include <linux/gpio/driver.h>

#include <linux/module.h>

#include <linux/platform_device.h>

​

#include <linux/mfd/tps65912.h>

​

struct tps65912_gpio {

    struct gpio_chip gpio_chip;

    struct tps65912 *tps;

};

​

static int tps65912_gpio_get_direction(struct gpio_chip *gc,

                       unsigned offset)

{

    struct tps65912_gpio *gpio = gpiochip_get_data(gc);

​

    int ret, val;

​

    ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);

    if (ret)

        return ret;

​

    if (val & GPIO_CFG_MASK)

        return 0;

    else

        return 1;

}

​

static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)

{

    struct tps65912_gpio *gpio = gpiochip_get_data(gc);

​

    return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,

                  GPIO_CFG_MASK, 0);

}

​

static int tps65912_gpio_direction_output(struct gpio_chip *gc,

                      unsigned offset, int value)

{

    struct tps65912_gpio *gpio = gpiochip_get_data(gc);

​

    /* Set the initial value */

    regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,

               GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);

​

    return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,

                  GPIO_CFG_MASK, GPIO_CFG_MASK);

}

​

static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)

{

    struct tps65912_gpio *gpio = gpiochip_get_data(gc);