drivers/net/ethernet/amd/xgbe/xgbe-platform.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/amd/xgbe/xgbe-platform.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/amd/xgbe/xgbe-platform.c
Extension
.c
Size
11290 bytes
Lines
467
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
/*
 * Copyright (c) 2014-2025, Advanced Micro Devices, Inc.
 * Copyright (c) 2014, Synopsys, Inc.
 * All rights reserved
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <linux/property.h>
#include <linux/acpi.h>
#include <linux/mdio.h>

#include "xgbe.h"
#include "xgbe-common.h"

#ifdef CONFIG_ACPI
static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
{
	struct device *dev = pdata->dev;
	u32 property;
	int ret;

	/* Obtain the system clock setting */
	ret = device_property_read_u32(dev, XGBE_ACPI_DMA_FREQ, &property);
	if (ret) {
		dev_err(dev, "unable to obtain %s property\n",
			XGBE_ACPI_DMA_FREQ);
		return ret;
	}
	pdata->sysclk_rate = property;

	/* Obtain the PTP clock setting */
	ret = device_property_read_u32(dev, XGBE_ACPI_PTP_FREQ, &property);
	if (ret) {
		dev_err(dev, "unable to obtain %s property\n",
			XGBE_ACPI_PTP_FREQ);
		return ret;
	}
	pdata->ptpclk_rate = property;

	return 0;
}
#else   /* CONFIG_ACPI */
static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
{
	return -EINVAL;
}
#endif  /* CONFIG_ACPI */

#ifdef CONFIG_OF
static int xgbe_of_support(struct xgbe_prv_data *pdata)
{
	struct device *dev = pdata->dev;

	/* Obtain the system clock setting */
	pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
	if (IS_ERR(pdata->sysclk)) {
		dev_err(dev, "dma devm_clk_get failed\n");
		return PTR_ERR(pdata->sysclk);
	}
	pdata->sysclk_rate = clk_get_rate(pdata->sysclk);

	/* Obtain the PTP clock setting */
	pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
	if (IS_ERR(pdata->ptpclk)) {
		dev_err(dev, "ptp devm_clk_get failed\n");
		return PTR_ERR(pdata->ptpclk);
	}
	pdata->ptpclk_rate = clk_get_rate(pdata->ptpclk);

	return 0;
}

static struct platform_device *xgbe_of_get_phy_pdev(struct xgbe_prv_data *pdata)
{
	struct device *dev = pdata->dev;
	struct device_node *phy_node;
	struct platform_device *phy_pdev;

	phy_node = of_parse_phandle(dev->of_node, "phy-handle", 0);

Annotation

Implementation Notes