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Re: [PATCH] mt76: eeprom: add support for big endian eeprom partition

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Lorenzo Bianconi <lorenzo@xxxxxxxxxx> writes:

> 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@xxxxxxxxxxxxxx>
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> ---
>  drivers/net/wireless/mediatek/mt76/eeprom.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c
> index 804224e81103..33d992d5662a 100644
> --- a/drivers/net/wireless/mediatek/mt76/eeprom.c
> +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c
> @@ -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]);
> +	}

What about the bindings documentation? I don't see this "big-endian"
documented in the mt76 doc, at least.

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches



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