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mt76: eeprom: add support for big endian eeprom partition

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mt76x0e users reported some devices (e.g TP-Link Archer VR200v) have
been flashed with big endian radio partition. Add the possibility to
specify eeprom endianness using big-endian dts property and in case
covert eeprom data in little endian

Tested-by: Kevin Schmidt <kevin.patrick.schmidt@googlemail.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2019-11-27 16:46:33 +02:00 committed by Felix Fietkau
parent 00c29ab2f6
commit b3c6d6388b
1 changed files with 10 additions and 0 deletions
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10
drivers/net/wireless/mediatek/mt76/eeprom.c
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@ -64,6 +64,16 @@ mt76_get_of_eeprom(struct mt76_dev *dev, int len)
goto out_put_node;
}
if (of_property_read_bool(dev->dev->of_node, "big-endian")) {
u8 *data = (u8 *)dev->eeprom.data;
int i;
/* convert eeprom data in Little Endian */
for (i = 0; i < round_down(len, 2); i += 2)
put_unaligned_le16(get_unaligned_be16(&data[i]),
&data[i]);
}
out_put_node:
of_node_put(np);
return ret;