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

[Alexandre TORGUE]

Hi Marek

On 5/4/22 14:49, 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: Alexandre Torgue <alexandre.torgue at foss.st.com>
> Cc: linux-stm32 at st-md-mailman.stormreply.com
> To: linux-arm-kernel at lists.infradead.org
> ---
>   arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi | 5 +++++
>   arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi   | 4 ++--
>   2 files changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi
> index 75172314d7afd..9937b28548c23 100644
> --- a/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi
> +++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-io1v8.dtsi
> @@ -18,6 +18,11 @@ vdd_io: regulator-buck-io {
>   	};
>   };
>   
> +&vdd {
> +	regulator-min-microvolt = <2900000>;
> +	regulator-max-microvolt = <2900000>;
> +};
> +
>   &pwr_regulators {
>   	vdd-supply = <&vdd_io>;
>   };
> diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
> index 6336c3ca0f0e2..134a798ad3f23 100644
> --- a/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
> +++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-som.dtsi
> @@ -119,8 +119,8 @@ vdd_ddr: buck2 {
>   
>   			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;

Applied on stm32-next.

Thanks.
Alex