linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * OF helpers for the GPIO API

 *

 * Copyright (c) 2007-2008  MontaVista Software, Inc.

 *

 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>

 */

​

#include <linux/device.h>

#include <linux/err.h>

#include <linux/errno.h>

#include <linux/module.h>

#include <linux/io.h>

#include <linux/gpio/consumer.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_gpio.h>

#include <linux/pinctrl/pinctrl.h>

#include <linux/slab.h>

#include <linux/gpio/machine.h>

​

#include "gpiolib.h"

​

static int of_gpiochip_match_node_and_xlate(struct gpio_chip *chip, void *data)

{

    struct of_phandle_args *gpiospec = data;

​

    return chip->gpiodev->dev.of_node == gpiospec->np &&

                chip->of_xlate &&

                chip->of_xlate(chip, gpiospec, NULL) >= 0;

}

​

static struct gpio_chip *of_find_gpiochip_by_xlate(

                    struct of_phandle_args *gpiospec)

{

    return gpiochip_find(gpiospec, of_gpiochip_match_node_and_xlate);

}

​

static struct gpio_desc *of_xlate_and_get_gpiod_flags(struct gpio_chip *chip,

                    struct of_phandle_args *gpiospec,

                    enum of_gpio_flags *flags)

{

    int ret;

​

    if (chip->of_gpio_n_cells != gpiospec->args_count)

        return ERR_PTR(-EINVAL);

​

    ret = chip->of_xlate(chip, gpiospec, flags);

    if (ret < 0)

        return ERR_PTR(ret);

​

    return gpiochip_get_desc(chip, ret);

}

​

static void of_gpio_flags_quirks(struct device_node *np,

                 const char *propname,

                 enum of_gpio_flags *flags,

                 int index)

{

    /*

     * Handle MMC "cd-inverted" and "wp-inverted" semantics.

     */