[PATCH] ARM: dts: stm32: Move DHCOR BUCK3 VDD 2V9 adjustment to 1V8 DTSI

[Patrice CHOTARD]

Hi Marek

On 5/4/22 14:50, Marek Vasut wrote:
> The Buck3 on DHCOR is used to supply IO voltage. It can output either 3V3
> in the default DHCOR configuration, or 2V9 in case of AV96 DHCOR variant
> which has extra Empirion DCDC converter in front of the 1V8 IO supply, or
> outright 1V8 in case of 1V8 IO DHCOR without the Empirion DCDC converter.
> 
> The 2V9 mode in case of AV96 DHCOR variant is used to reduce unnecessarily
> high input voltage to the Empirion DCDC converter, so move it into matching
> DTSI to stop confusing users.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Patrice Chotard <patrice.chotard at foss.st.com>
> Cc: Patrick Delaunay <patrick.delaunay at foss.st.com>
> ---
>  arch/arm/dts/stm32mp15xx-dhcor-io1v8.dtsi | 5 +++++
>  arch/arm/dts/stm32mp15xx-dhcor-som.dtsi   | 4 ++--
>  2 files changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/dts/stm32mp15xx-dhcor-io1v8.dtsi b/arch/arm/dts/stm32mp15xx-dhcor-io1v8.dtsi
> index 75172314d7a..9937b28548c 100644
> --- a/arch/arm/dts/stm32mp15xx-dhcor-io1v8.dtsi
> +++ b/arch/arm/dts/stm32mp15xx-dhcor-io1v8.dtsi
> @@ -18,6 +18,11 @@
>  	};
>  };
>  
> +&vdd {
> +	regulator-min-microvolt = <2900000>;
> +	regulator-max-microvolt = <2900000>;
> +};
> +
>  &pwr_regulators {
>  	vdd-supply = <&vdd_io>;
>  };
> diff --git a/arch/arm/dts/stm32mp15xx-dhcor-som.dtsi b/arch/arm/dts/stm32mp15xx-dhcor-som.dtsi
> index 44ecc470858..98033b51479 100644
> --- a/arch/arm/dts/stm32mp15xx-dhcor-som.dtsi
> +++ b/arch/arm/dts/stm32mp15xx-dhcor-som.dtsi
> @@ -77,8 +77,8 @@
>  
>  			vdd: buck3 {
>  				regulator-name = "vdd";
> -				regulator-min-microvolt = <2900000>;
> -				regulator-max-microvolt = <2900000>;
> +				regulator-min-microvolt = <3300000>;
> +				regulator-max-microvolt = <3300000>;
>  				regulator-always-on;
>  				regulator-initial-mode = <0>;
>  				regulator-over-current-protection;
Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>

Thanks
Patrice