linux-kernel - Re: [PATCH v2] arm64: dts: amlogic: Add the Ethernet "timing-adjustment" clock

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Date:   Mon, 22 Jun 2020 09:56:57 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        khilman@...libre.com, linux-amlogic@...ts.infradead.org
Cc:     andrew@...n.ch, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] arm64: dts: amlogic: Add the Ethernet
 "timing-adjustment" clock

On 20/06/2020 18:23, Martin Blumenstingl wrote:
> Add the "timing-adjustment" clock now that we know how it is connected
> to the PRG_ETHERNET registers. It is used internally to generate the
> RGMII RX delay on the MAC side (if needed).
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
> Changes since v1 at [0]:
> - fixed all typos in the commit message (hopefully...). Thanks to Andrew
>   for spotting the first ("no" -> "on") one and shame on me for having
>   to find two more ("adjusment" -> "adjustment", "now" -> "know")
> 
> 
> [0] https://patchwork.kernel.org/patch/11616101/
> 
> 
>  arch/arm64/boot/dts/amlogic/meson-axg.dtsi        | 6 ++++--
>  arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi | 6 ++++--
>  arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi       | 5 +++--
>  arch/arm64/boot/dts/amlogic/meson-gxl.dtsi        | 5 +++--
>  4 files changed, 14 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
> index 8e6281c685fa..b9efc8469265 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
> @@ -181,8 +181,10 @@ ethmac: ethernet@...f0000 {
>  			interrupt-names = "macirq";
>  			clocks = <&clkc CLKID_ETH>,
>  				 <&clkc CLKID_FCLK_DIV2>,
> -				 <&clkc CLKID_MPLL2>;
> -			clock-names = "stmmaceth", "clkin0", "clkin1";
> +				 <&clkc CLKID_MPLL2>,
> +				 <&clkc CLKID_FCLK_DIV2>;
> +			clock-names = "stmmaceth", "clkin0", "clkin1",
> +				      "timing-adjustment";
>  			rx-fifo-depth = <4096>;
>  			tx-fifo-depth = <2048>;
>  			status = "disabled";
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> index 593a006f4b7b..41805f2ed8fc 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> @@ -185,8 +185,10 @@ ethmac: ethernet@...f0000 {
>  			interrupt-names = "macirq";
>  			clocks = <&clkc CLKID_ETH>,
>  				 <&clkc CLKID_FCLK_DIV2>,
> -				 <&clkc CLKID_MPLL2>;
> -			clock-names = "stmmaceth", "clkin0", "clkin1";
> +				 <&clkc CLKID_MPLL2>,
> +				 <&clkc CLKID_FCLK_DIV2>;
> +			clock-names = "stmmaceth", "clkin0", "clkin1",
> +				      "timing-adjustment";
>  			rx-fifo-depth = <4096>;
>  			tx-fifo-depth = <2048>;
>  			status = "disabled";
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> index 234490d3ee68..03c25b9facff 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> @@ -333,8 +333,9 @@ &efuse {
>  &ethmac {
>  	clocks = <&clkc CLKID_ETH>,
>  		 <&clkc CLKID_FCLK_DIV2>,
> -		 <&clkc CLKID_MPLL2>;
> -	clock-names = "stmmaceth", "clkin0", "clkin1";
> +		 <&clkc CLKID_MPLL2>,
> +		 <&clkc CLKID_FCLK_DIV2>;
> +	clock-names = "stmmaceth", "clkin0", "clkin1", "timing-adjustment";
>  };
>  
>  &gpio_intc {
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> index fc59c8534c0f..60484bbc7272 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> @@ -131,8 +131,9 @@ &efuse {
>  &ethmac {
>  	clocks = <&clkc CLKID_ETH>,
>  		 <&clkc CLKID_FCLK_DIV2>,
> -		 <&clkc CLKID_MPLL2>;
> -	clock-names = "stmmaceth", "clkin0", "clkin1";
> +		 <&clkc CLKID_MPLL2>,
> +		 <&clkc CLKID_FCLK_DIV2>;
> +	clock-names = "stmmaceth", "clkin0", "clkin1", "timing-adjustment";
>  
>  	mdio0: mdio {
>  		#address-cells = <1>;
> 

Reviewed-by: Neil Armstrong <narmstrong@...libre.com>