Re: [PATCH] arm64: dts: qcom: qcs6490-rb3gen2: Increase MCP2518FD SPI frequency to 17MHz

[Dmitry Baryshkov]

On Tue, Aug 11, 2026 at 12:00:44AM +0530, Viken Dadhaniya wrote:
> The MCP2518FD CAN controller is limited to 14MHz because higher SPI
> frequencies are unreliable with the current SPI3 pin drive strength.
> 
> Set the SPI3 data, clock and chip-select lines to 8mA drive strength and
> raise spi-max-frequency to 17MHz, the maximum allowed by the MCP2518FD
> errata:
> 
>   0.85 * Fosc / 2 = 0.85 * 40MHz / 2 = 17MHz
> 
> Signed-off-by: Viken Dadhaniya <viken.dadhaniya@xxxxxxxxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>


-- 
With best wishes
Dmitry