linux-kernel - RE: [PATCH v2 5/5] arm64: dts: lx2160a: fix FlexSPI clock

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Date:   Fri, 6 Nov 2020 02:00:10 +0000
From:   Leo Li <leoyang.li@....com>
To:     Michael Walle <michael@...le.cc>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
CC:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>
Subject: RE: [PATCH v2 5/5] arm64: dts: lx2160a: fix FlexSPI clock



> -----Original Message-----
> From: Michael Walle <michael@...le.cc>
> Sent: Thursday, November 5, 2020 1:35 PM
> To: linux-clk@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org
> Cc: Michael Turquette <mturquette@...libre.com>; Stephen Boyd
> <sboyd@...nel.org>; Rob Herring <robh+dt@...nel.org>; Shawn Guo
> <shawnguo@...nel.org>; Leo Li <leoyang.li@....com>; Michael Walle
> <michael@...le.cc>
> Subject: [PATCH v2 5/5] arm64: dts: lx2160a: fix FlexSPI clock
> 
> Now that we have a proper driver for the FlexSPI interface use it. This will fix
> SCK frequency switching on Layerscape SoCs.
> 
> This was only compile time tested.
> 
> Signed-off-by: Michael Walle <michael@...le.cc>
> ---
> Changes since v1:
>  - none
> 
>  arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
> b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
> index 83072da6f6c6..6e375e80bd35 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
> @@ -659,9 +659,20 @@
>  		};
> 
>  		dcfg: syscon@...0000 {
> -			compatible = "fsl,lx2160a-dcfg", "syscon";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			compatible = "fsl,lx2160a-dcfg", "syscon", "simple-
> mfd";
>  			reg = <0x0 0x1e00000 0x0 0x10000>;
> +			ranges = <0x0 0x0 0x1e00000 0x10000>;
>  			little-endian;
> +
> +			fspi_clk: clock-controller@900 {
> +				compatible = "fsl,lx2160a-flexspi-clk";
> +				reg = <0x900 0x4>;
> +				#clock-cells = <0>;
> +				clocks = <&clockgen 4 0>;

This is different from the current <&clockgen 4 3>, is it an intended change?

> +				clock-output-names = "fspi_clk";
> +			};
>  		};
> 
>  		tmu: tmu@...0000 {
> @@ -776,7 +787,7 @@
>  			      <0x0 0x20000000 0x0 0x10000000>;
>  			reg-names = "fspi_base", "fspi_mmap";
>  			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
> -			clocks = <&clockgen 4 3>, <&clockgen 4 3>;
> +			clocks = <&clockgen 4 3>, <&fspi_clk>;
>  			clock-names = "fspi_en", "fspi";
>  			status = "disabled";
>  		};
> --
> 2.20.1