linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * TI TPS6586x GPIO driver

 *

 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.

 * Author: Laxman dewangan <ldewangan@nvidia.com>

 *

 * Based on tps6586x.c

 * Copyright (c) 2010 CompuLab Ltd.

 * Mike Rapoport <mike@compulab.co.il>

 */

​

#include <linux/errno.h>

#include <linux/gpio/driver.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/mfd/tps6586x.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

​

/* GPIO control registers */

#define TPS6586X_GPIOSET1   0x5d

#define TPS6586X_GPIOSET2   0x5e

​

struct tps6586x_gpio {

    struct gpio_chip gpio_chip;

    struct device *parent;

};

​

static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)

{

    struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);

    uint8_t val;

    int ret;

​

    ret = tps6586x_read(tps6586x_gpio->parent, TPS6586X_GPIOSET2, &val);

    if (ret)

        return ret;

​

    return !!(val & (1 << offset));

}

​

static void tps6586x_gpio_set(struct gpio_chip *gc, unsigned offset,

                  int value)

{

    struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);

​

    tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET2,

            value << offset, 1 << offset);

}

​

static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,

                int value)

{

    struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);

    uint8_t val, mask;

​

    tps6586x_gpio_set(gc, offset, value);

​

    val = 0x1 << (offset * 2);

    mask = 0x3 << (offset * 2);

​

    return tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET1,