linux-kernel - Re: [PATCH 2/2] Revert "arm64: dts: ls1028a: add flextimer based pwm nodes"

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Date:   Sat, 29 Jan 2022 13:42:10 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Michael Walle <michael@...le.cc>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Li Yang <leoyang.li@....com>,
        Rob Herring <robh+dt@...nel.org>, Biwen Li <biwen.li@....com>
Subject: Re: [PATCH 2/2] Revert "arm64: dts: ls1028a: add flextimer based pwm
 nodes"

On Sat, Jan 15, 2022 at 10:09:07PM +0100, Michael Walle wrote:
> The changes to the device tree look very wrong. There are now two
> devices with the same base address: pwm0 and ftm_alarm0. Both are using
> the Flex Timer Module. It seems like this should either be one driver or
> and MFD driver. Either way, there should only be one node in the device
> tree. Revert the offending changes to avoid getting a broken device tree
> in circulation.

Why not just fix the conflicting nodes?

Shawn

> 
> This reverts commit 71799672ea24d2935322d655d2407c1ccd7db9ff.
> 
> Fixes: 71799672ea24 ("arm64: dts: ls1028a: add flextimer based pwm nodes")
> Signed-off-by: Michael Walle <michael@...le.cc>
> ---
> 
> Btw, the nodes are also not sorted by the address. Otherwise it should have
> been spotted easily.
> 
>  .../arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 95 -------------------
>  1 file changed, 95 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> index 1ef26cbc79cb..d3cc8cbaf768 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> @@ -66,13 +66,6 @@ CPU_PW20: cpu-pw20 {
>  		};
>  	};
>  
> -	rtc_clk: rtc-clk {
> -		compatible = "fixed-clock";
> -		#clock-cells = <0>;
> -		clock-frequency = <32768>;
> -		clock-output-names = "rtc_clk";
> -	};
> -
>  	sysclk: sysclk {
>  		compatible = "fixed-clock";
>  		#clock-cells = <0>;
> @@ -1245,94 +1238,6 @@ ierb@...800000 {
>  			reg = <0x01 0xf0800000 0x0 0x10000>;
>  		};
>  
> -		pwm0: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2800000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm1: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2810000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm2: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2820000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm3: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2830000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm4: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2840000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm5: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2850000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm6: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2860000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
> -		pwm7: pwm@...0000 {
> -			compatible = "fsl,vf610-ftm-pwm";
> -			#pwm-cells = <3>;
> -			reg = <0x0 0x2870000 0x0 0x10000>;
> -			clock-names = "ftm_sys", "ftm_ext",
> -				      "ftm_fix", "ftm_cnt_clk_en";
> -			clocks = <&clockgen 4 1>, <&clockgen 4 1>,
> -				 <&rtc_clk>, <&clockgen 4 1>;
> -			status = "disabled";
> -		};
> -
>  		rcpm: power-controller@...4040 {
>  			compatible = "fsl,ls1028a-rcpm", "fsl,qoriq-rcpm-2.1+";
>  			reg = <0x0 0x1e34040 0x0 0x1c>;
> -- 
> 2.30.2
>