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mac80211: rt2x00: load the eeprom data from devicetree embedded data on Ralink SoCs

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It will allow loading eeprom from eeprom-data embedded in device tree.
Ported from mediatek mt76 wireless driver (drivers/net/wireless/mediatek/mt76/eeprom.c)

Signed-off-by: Coia Prant <coiaprant@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17472
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Coia Prant 2025-02-17 14:22:59 +08:00 committed by Hauke Mehrtens
parent 6da7352ebe
commit 5d266b55ed
1 changed files with 76 additions and 0 deletions
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76
package/kernel/mac80211/patches/rt2x00/603-wifi-rt2x00-Add-support-for-loading-EEPROM-from-devicetree-embedded-data.patch Normal file
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@ -0,0 +1,76 @@
From adf957124a115bdf3e4728e1ea8c70a632648cf0 Mon Sep 17 00:00:00 2001
From: Coia Prant <coiaprant@gmail.com>
Date: Fri, 14 Feb 2025 15:49:55 +0800
Subject: [PATCH] wifi: rt2x00: Add support for loading EEPROM from devicetree
embedded data
This patch allows rt2x00 to load eeprom from devicetree embedded data.
Example:
/* load eeprom from embedded data 'eeprom-data' */
&wmac {
ralink,eeprom-data = <0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff
0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff 0xffffffff>;
};
Signed-off-by: Coia Prant <coiaprant@gmail.com>
---
.../net/wireless/ralink/rt2x00/rt2x00eeprom.c | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
@@ -33,6 +33,27 @@ static void rt2800lib_eeprom_swap(struct
rt2x00dev->eeprom[i] = swab16(rt2x00dev->eeprom[i]);
}
+static int rt2800lib_read_eeprom_data(struct rt2x00_dev *rt2x00dev)
+{
+ struct device_node *np = rt2x00dev->dev->of_node;
+ unsigned int len = rt2x00dev->ops->eeprom_size;
+ const void *data;
+ int size;
+
+ data = of_get_property(np, "ralink,eeprom-data", &size);
+ if (!data)
+ return -ENOENT;
+
+ if (size != len) {
+ dev_err(rt2x00dev->dev, "invalid eeprom size, required: 0x%04x\n", len);
+ return -EINVAL;
+ }
+
+ memcpy(rt2x00dev->eeprom, data, size);
+
+ return 0;
+}
+
#if IS_ENABLED(CONFIG_MTD)
static int rt2800lib_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
{
@@ -193,6 +214,10 @@ int rt2x00lib_read_eeprom(struct rt2x00_
{
int ret;
+ ret = rt2800lib_read_eeprom_data(rt2x00dev);
+ if (!ret)
+ return 0;
+
#if IS_ENABLED(CONFIG_MTD)
ret = rt2800lib_read_eeprom_mtd(rt2x00dev);
if (!ret)