Re: [PATCH 03/16] arm64: dts: imx8mm-beacon-som.dtsi: Align regulator names with schema

[Vaittinen, Matti]

Hello Krzysztof,

Just some questions - please ignore if I misunderstood the impact of
the change.

On Mon, 2020-08-24 at 21:06 +0200, Krzysztof Kozlowski wrote:
> Device tree schema expects regulator names to be lowercase.  This
> fixes
> dtbs_check warnings like:
> 
>     arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dt.yaml: pmic@4b:
> regulators:LDO1:regulator-name:0: 'LDO1' does not match '^ldo[1-6]$'
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> ---
>  .../boot/dts/freescale/imx8mn-ddr4-evk.dts    | 22 +++++++++------
> ----
>  1 file changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> index a1e5483dbbbe..299caed5d46e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> @@ -60,7 +60,7 @@
>  
>  		regulators {
>  			buck1_reg: BUCK1 {
> -				regulator-name = "BUCK1";
> +				regulator-name = "buck1";

I am not against this change but I would expect seeing some other
patches too? I guess this will change the regulator name in regulator
core, right? So maybe I am mistaken but it looks to me this change is
visible in suppliers, sysfs and debugfs too? Thus changing this sounds
a bit like asking for a nose bleed :) Am I right that the impact of
this change has been thoroughly tested? Are there any other patches
(that I have not seen) related to this change?

>  				regulator-min-microvolt = <700000>;
>  				regulator-max-microvolt = <1300000>;
>  				regulator-boot-on;
> @@ -69,7 +69,7 @@
>  			};
>  
>  			buck2_reg: BUCK2 {
> -				regulator-name = "BUCK2";
> +				regulator-name = "buck2";
>  				regulator-min-microvolt = <700000>;
>  				regulator-max-microvolt = <1300000>;
>  				regulator-boot-on;
> @@ -79,14 +79,14 @@
>  
>  			buck3_reg: BUCK3 {
>  				// BUCK5 in datasheet
> -				regulator-name = "BUCK3";
> +				regulator-name = "buck3";
>  				regulator-min-microvolt = <700000>;
>  				regulator-max-microvolt = <1350000>;
>  			};
>  
>  			buck4_reg: BUCK4 {
>  				// BUCK6 in datasheet
> -				regulator-name = "BUCK4";
> +				regulator-name = "buck4";
>  				regulator-min-microvolt = <3000000>;
>  				regulator-max-microvolt = <3300000>;
>  				regulator-boot-on;
> @@ -95,7 +95,7 @@
>  
>  			buck5_reg: BUCK5 {
>  				// BUCK7 in datasheet
> -				regulator-name = "BUCK5";
> +				regulator-name = "buck5";

What I see in bd718x7-regulator.c for LDO6 desc is:

                        /* LDO6 is supplied by buck5 */
                        .supply_name = "buck5",

So, is this change going to change the supply-chain for the board? Is
this intended? (Or am I mistaken on what is the impact of regulator-
name property?)

Best Regards
	Matti Vaittinen