arch/mips/bcm47xx/workarounds.c

Source file repositories/reference/linux-study-clean/arch/mips/bcm47xx/workarounds.c

File Facts

System
Linux kernel
Corpus path
arch/mips/bcm47xx/workarounds.c
Extension
.c
Size
823 bytes
Lines
37
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include "bcm47xx_private.h"

#include <linux/gpio.h>
#include <bcm47xx_board.h>
#include <bcm47xx.h>

static void __init bcm47xx_workarounds_enable_usb_power(int usb_power)
{
	int err;

	err = gpio_request_one(usb_power, GPIOF_OUT_INIT_HIGH, "usb_power");
	if (err)
		pr_err("Failed to request USB power gpio: %d\n", err);
	else
		gpio_free(usb_power);
}

void __init bcm47xx_workarounds(void)
{
	enum bcm47xx_board board = bcm47xx_board_get();

	switch (board) {
	case BCM47XX_BOARD_NETGEAR_WNR3500L:
	case BCM47XX_BOARD_NETGEAR_WNR3500L_V2:
		bcm47xx_workarounds_enable_usb_power(12);
		break;
	case BCM47XX_BOARD_NETGEAR_WNDR3400V2:
	case BCM47XX_BOARD_NETGEAR_WNDR3400_V3:
		bcm47xx_workarounds_enable_usb_power(21);
		break;
	default:
		/* No workaround(s) needed */
		break;
	}
}

Annotation

Implementation Notes