Re: [PATCH 08/10] ARM: dts: Cygnus: Fix SP805 clocks

Ray Jui
2020-08-28T17:09:12Z

On 8/28/2020 6:06 AM, Andre Przywara wrote:
> The SP805 DT binding requires two clocks to be specified, but the
> Broadcom Cygnus DT currently only specifies one clock.
>
> In practice, Linux would pick a clock named "apb_pclk" for the bus
> clock, and the Linux and U-Boot SP805 driver would use the first clock
> to derive the actual watchdog counter frequency.
>
> Since currently both are the very same clock, we can just double the
> clock reference, and add the correct clock-names, to match the binding.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> arch/arm/boot/dts/bcm-cygnus.dtsi | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
> index 35bdd0969f0a..dacaef2c14ca 100644
> --- a/arch/arm/boot/dts/bcm-cygnus.dtsi
> +++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
> @@ -234,8 +234,8 @@
> compatible = "arm,sp805" , "arm,primecell";
> reg = <0x18009000 0x1000>;
> interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
> - clocks = <&axi81_clk>;
> - clock-names = "apb_pclk";
> + clocks = <&axi81_clk>, <&axi81_clk>;
> + clock-names = "wdog_clk", "apb_pclk";
> };
>
> gpio_ccm: gpio@1800a000 {
>

Reviewed-by: Ray Jui <ray.jui@broadcom.com>