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// SPDX-License-Identifier: GPL-2.0+
/*
* Xilinx ethernet phy reset driver
*
* Copyright (C) 2022 Xilinx, Inc.
*/
#include <common.h>
#include <dm/device_compat.h>
#include <phy.h>
#include <linux/delay.h>
#include <asm/gpio.h>
struct phy_device *phy_connect_phy_id(struct mii_dev *bus, struct udevice *dev,
phy_interface_t interface)
{
struct phy_device *phydev;
struct ofnode_phandle_args phandle_args;
struct gpio_desc gpio;
ofnode node;
u32 id, assert, deassert;
u16 vendor, device;
int ret;
if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
&phandle_args))
return NULL;
if (!ofnode_valid(phandle_args.node))
return NULL;
node = phandle_args.node;
ret = ofnode_read_eth_phy_id(node, &vendor, &device);
if (ret) {
dev_err(dev, "Failed to read eth PHY id, err: %d\n", ret);
return NULL;
}
ret = gpio_request_by_name_nodev(node, "reset-gpios", 0, &gpio,
GPIOD_ACTIVE_LOW);
if (!ret) {
assert = ofnode_read_u32_default(node, "reset-assert-us", 0);
deassert = ofnode_read_u32_default(node,
"reset-deassert-us", 0);
ret = dm_gpio_set_value(&gpio, 1);
if (ret) {
dev_err(dev, "Failed assert gpio, err: %d\n", ret);
return NULL;
}
udelay(assert);
ret = dm_gpio_set_value(&gpio, 0);
if (ret) {
dev_err(dev, "Failed deassert gpio, err: %d\n", ret);
return NULL;
}
udelay(deassert);
}
id = vendor << 16 | device;
phydev = phy_device_create(bus, 0, id, false, interface);
if (phydev)
phydev->node = node;
return phydev;
}
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