Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2011, 2012 Cavium, Inc.
 */
 
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/of_mdio.h>
#include <linux/module.h>
#include <linux/phy.h>
#include <linux/mdio-mux.h>
#include <linux/gpio/consumer.h>
 
#define DRV_VERSION "1.1"
#define DRV_DESCRIPTION "GPIO controlled MDIO bus multiplexer driver"
 
struct mdio_mux_gpio_state {
<------>struct gpio_descs *gpios;
<------>void *mux_handle;
};
 
static int mdio_mux_gpio_switch_fn(int current_child, int desired_child,
<------><------><------><------>   void *data)
{
<------>struct mdio_mux_gpio_state *s = data;
<------>DECLARE_BITMAP(values, BITS_PER_TYPE(desired_child));
 
<------>if (current_child == desired_child)
<------><------>return 0;
 
<------>values[0] = desired_child;
 
<------>gpiod_set_array_value_cansleep(s->gpios->ndescs, s->gpios->desc,
<------><------><------><------>       s->gpios->info, values);
 
<------>return 0;
}
 
static int mdio_mux_gpio_probe(struct platform_device *pdev)
{
<------>struct mdio_mux_gpio_state *s;
<------>struct gpio_descs *gpios;
<------>int r;
 
<------>gpios = devm_gpiod_get_array(&pdev->dev, NULL, GPIOD_OUT_LOW);
<------>if (IS_ERR(gpios))
<------><------>return PTR_ERR(gpios);
 
<------>s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);
<------>if (!s)
<------><------>return -ENOMEM;
 
<------>s->gpios = gpios;
 
<------>r = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
<------><------><------>  mdio_mux_gpio_switch_fn, &s->mux_handle, s, NULL);
 
<------>if (r != 0)
<------><------>return r;
 
<------>pdev->dev.platform_data = s;
<------>return 0;
}
 
static int mdio_mux_gpio_remove(struct platform_device *pdev)
{
<------>struct mdio_mux_gpio_state *s = dev_get_platdata(&pdev->dev);
<------>mdio_mux_uninit(s->mux_handle);
<------>return 0;
}
 
static const struct of_device_id mdio_mux_gpio_match[] = {
<------>{
<------><------>.compatible = "mdio-mux-gpio",
<------>},
<------>{
<------><------>/* Legacy compatible property. */
<------><------>.compatible = "cavium,mdio-mux-sn74cbtlv3253",
<------>},
<------>{},
};
MODULE_DEVICE_TABLE(of, mdio_mux_gpio_match);
 
static struct platform_driver mdio_mux_gpio_driver = {
<------>.driver = {
<------><------>.name		= "mdio-mux-gpio",
<------><------>.of_match_table = mdio_mux_gpio_match,
<------>},
<------>.probe		= mdio_mux_gpio_probe,
<------>.remove		= mdio_mux_gpio_remove,
};
 
module_platform_driver(mdio_mux_gpio_driver);
 
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR("David Daney");
MODULE_LICENSE("GPL v2");