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

From: Konrad Dybcio

Date: Tue Aug 18 2026 - 07:44:21 EST


On 8/10/26 8:30 PM, 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>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad