Commit 255d3807 authored by Daniel Golle's avatar Daniel Golle Committed by Felix Fietkau
Browse files

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: default avatarDaniel Golle <daniel@makrotopia.org>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent c4a784e3

drivers/net/wireless/mediatek/mt76/eeprom.c

+11 −0
Original line number Diff line number Diff line
@@ -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;