From 255d3807b60436c9699fc593b66b2dbb6203b2df Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Wed, 25 Aug 2021 02:32:16 +0100 Subject: [PATCH] mt76: support reading EEPROM data embedded in fdt Some platforms boot from SD card and don't come with calibration data stored anywhere on the board. As EEPROM data is rather small it can be embedded into the device tree to be loaded from there by the mt76. Signed-off-by: Daniel Golle Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/eeprom.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c index 376c3bd883e5..e65b2262e692 100644 --- a/drivers/net/wireless/mediatek/mt76/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c @@ -15,6 +15,7 @@ int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len) struct device_node *np = dev->dev->of_node; struct mtd_info *mtd; const __be32 *list; + const void *data; const char *part; phandle phandle; int size; @@ -24,6 +25,16 @@ int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len) if (!np) return -ENOENT; + data = of_get_property(np, "mediatek,eeprom-data", &size); + if (data) { + if (size > len) + return -EINVAL; + + memcpy(eep, data, size); + + return 0; + } + list = of_get_property(np, "mediatek,mtd-eeprom", &size); if (!list) return -ENOENT;