[PATCH v3 6/9] dt-bindings: rtc: add refclk to mpfs-rtc

[Stephen Boyd]

Quoting Conor Dooley (2022-04-13 00:58:33)
> The rtc on PolarFire SoC does not use the AHB clock as its reference
> frequency, but rather a 1 MHz refclk that it shares with MTIMER. Add
> this second clock to the binding as a required property.
> 
> Fixes: 4cbcc0d7b397 ("dt-bindings: rtc: add bindings for microchip mpfs rtc")
> Reviewed-by: Daire McNamara <daire.mcnamara at microchip.com>
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
> Signed-off-by: Conor Dooley <conor.dooley at microchip.com>
> ---

Applied to clk-fixes