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| author | Bjørn Mork <bjorn@mork.no> | 2020-04-05 16:17:11 +0200 |
|---|---|---|
| committer | Petr Štetiar <ynezz@true.cz> | 2020-07-08 16:07:05 +0200 |
| commit | d512657195de2f8062fc2354af1c3d96bf378d9b (patch) | |
| tree | c29fb7cf965083863e7215a327400d10b111ffa8 /package/kernel/mt7621-qtn-rgmii/src | |
| parent | 20c7abd4b7b9b4203b6858136b2c811b6dbd8dae (diff) | |
| download | upstream-d512657195de2f8062fc2354af1c3d96bf378d9b.tar.gz upstream-d512657195de2f8062fc2354af1c3d96bf378d9b.tar.bz2 upstream-d512657195de2f8062fc2354af1c3d96bf378d9b.zip | |
mt7621-qtn-rgmii: enable RGMII connected Quantenna QV840
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>
Diffstat (limited to 'package/kernel/mt7621-qtn-rgmii/src')
| -rw-r--r-- | package/kernel/mt7621-qtn-rgmii/src/Makefile | 1 | ||||
| -rw-r--r-- | package/kernel/mt7621-qtn-rgmii/src/mt7621-qtn-rgmii.c | 48 |
2 files changed, 49 insertions, 0 deletions
diff --git a/package/kernel/mt7621-qtn-rgmii/src/Makefile b/package/kernel/mt7621-qtn-rgmii/src/Makefile new file mode 100644 index 0000000000..c993ac45bd --- /dev/null +++ b/package/kernel/mt7621-qtn-rgmii/src/Makefile @@ -0,0 +1 @@ +obj-m += mt7621-qtn-rgmii.o diff --git a/package/kernel/mt7621-qtn-rgmii/src/mt7621-qtn-rgmii.c b/package/kernel/mt7621-qtn-rgmii/src/mt7621-qtn-rgmii.c new file mode 100644 index 0000000000..5f223b5d75 --- /dev/null +++ b/package/kernel/mt7621-qtn-rgmii/src/mt7621-qtn-rgmii.c @@ -0,0 +1,48 @@ +// 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"); |