mirror of
https://github.com/openwrt/openwrt.git
synced 2025-02-09 12:21:33 +00:00
d512657195
Write a magic value to a magic destination. This might be specific to the Mitrastar designed ZyXEL WAP6805. Signed-off-by: Bjørn Mork <bjorn@mork.no>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2020 Bjørn Mork <bjorn@mork.no>
|
|
*/
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
|
|
#define MODULE_NAME "mt7621-qtn-rgmii"
|
|
#define RGMII_REG_BASE 0x1e110008
|
|
#define RGMII_REG_SIZE 4
|
|
#define RGMII_REG_VALUE 0x9000c
|
|
|
|
static u32 oldval;
|
|
|
|
static int __init mt7621_qtn_rgmii_init(void)
|
|
{
|
|
void __iomem *base = ioremap(RGMII_REG_BASE, RGMII_REG_SIZE);
|
|
|
|
if (!base)
|
|
return -ENOMEM;
|
|
oldval = ioread32(base);
|
|
if (oldval != RGMII_REG_VALUE) {
|
|
iowrite32(RGMII_REG_VALUE, base);
|
|
pr_info(MODULE_NAME ": changed register 0x%08x value from 0x%08x to 0x%08x\n", RGMII_REG_BASE, oldval, RGMII_REG_VALUE);
|
|
}
|
|
iounmap(base);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit mt7621_qtn_rgmii_exit(void)
|
|
{
|
|
void __iomem *base = ioremap(RGMII_REG_BASE, RGMII_REG_SIZE);
|
|
|
|
if (!base)
|
|
return;
|
|
if (oldval != RGMII_REG_VALUE) {
|
|
iowrite32(oldval, base);
|
|
pr_info(MODULE_NAME ": reset register 0x%08x back to 0x%08x\n", RGMII_REG_BASE, oldval);
|
|
}
|
|
iounmap(base);
|
|
}
|
|
|
|
module_init(mt7621_qtn_rgmii_init);
|
|
module_exit(mt7621_qtn_rgmii_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
|
|
MODULE_DESCRIPTION("Enable RGMII connected Quantenna module on MT7621");
|