[PATCH] ARM: dts: stm32: Repair PMIC configuration on AV96

[PATCH] ARM: dts: stm32: Repair PMIC configuration on AV96

[Marek Vasut]

The core and vdd PMIC buck regulators were misconfigured, which caused
instability of the board and malfunction of high-speed interfaces, like
the RGMII. Furthermore, the vtt_ddr was also wrong. Configure the PMIC
correctly to repair these problems.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
---
 arch/arm/dts/stm32mp157a-avenger96.dts | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/arm/dts/stm32mp157a-avenger96.dts b/arch/arm/dts/stm32mp157a-avenger96.dts
index b6c984171a..8e36df8787 100644
--- a/arch/arm/dts/stm32mp157a-avenger96.dts
+++ b/arch/arm/dts/stm32mp157a-avenger96.dts
@@ -153,7 +153,7 @@
 
 			vddcore: buck1 {
 				regulator-name = "vddcore";
-				regulator-min-microvolt = <1200000>;
+				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <1350000>;
 				regulator-always-on;
 				regulator-initial-mode = <0>;
@@ -171,8 +171,8 @@
 
 			vdd: buck3 {
 				regulator-name = "vdd";
-				regulator-min-microvolt = <3300000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <2500000>;
+				regulator-max-microvolt = <2500000>;
 				regulator-always-on;
 				st,mask_reset;
 				regulator-initial-mode = <0>;
@@ -206,8 +206,8 @@
 
 			vtt_ddr: ldo3 {
 				regulator-name = "vtt_ddr";
-				regulator-min-microvolt = <500000>;
-				regulator-max-microvolt = <750000>;
+				regulator-min-microvolt = <0>;
+				regulator-max-microvolt = <1000000>;
 				regulator-always-on;
 				regulator-over-current-protection;
 			};
@@ -254,6 +254,7 @@
 				regulator-name = "vbus_otg";
 				interrupts = <IT_OCP_OTG 0>;
 				interrupt-parent = <&pmic>;
+				regulator-active-discharge = <1>;
 			};
 
 			vbus_sw: pwr_sw2 {
-- 
2.25.1

[PATCH] ARM: dts: stm32: Repair PMIC configuration on AV96

[Patrice CHOTARD]

Hi Marek

On 3/27/20 12:37 AM, Marek Vasut wrote:
> The core and vdd PMIC buck regulators were misconfigured, which caused
> instability of the board and malfunction of high-speed interfaces, like
> the RGMII. Furthermore, the vtt_ddr was also wrong. Configure the PMIC
> correctly to repair these problems.
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Patrick Delaunay <patrick.delaunay@st.com>
> Cc: Patrice Chotard <patrice.chotard@st.com>
> ---
>  arch/arm/dts/stm32mp157a-avenger96.dts | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/dts/stm32mp157a-avenger96.dts b/arch/arm/dts/stm32mp157a-avenger96.dts
> index b6c984171a..8e36df8787 100644
> --- a/arch/arm/dts/stm32mp157a-avenger96.dts
> +++ b/arch/arm/dts/stm32mp157a-avenger96.dts
> @@ -153,7 +153,7 @@
>  
>  			vddcore: buck1 {
>  				regulator-name = "vddcore";
> -				regulator-min-microvolt = <1200000>;
> +				regulator-min-microvolt = <800000>;
>  				regulator-max-microvolt = <1350000>;
>  				regulator-always-on;
>  				regulator-initial-mode = <0>;
> @@ -171,8 +171,8 @@
>  
>  			vdd: buck3 {
>  				regulator-name = "vdd";
> -				regulator-min-microvolt = <3300000>;
> -				regulator-max-microvolt = <3300000>;
> +				regulator-min-microvolt = <2500000>;
> +				regulator-max-microvolt = <2500000>;
>  				regulator-always-on;
>  				st,mask_reset;
>  				regulator-initial-mode = <0>;
> @@ -206,8 +206,8 @@
>  
>  			vtt_ddr: ldo3 {
>  				regulator-name = "vtt_ddr";
> -				regulator-min-microvolt = <500000>;
> -				regulator-max-microvolt = <750000>;
> +				regulator-min-microvolt = <0>;
> +				regulator-max-microvolt = <1000000>;
>  				regulator-always-on;
>  				regulator-over-current-protection;
>  			};
> @@ -254,6 +254,7 @@
>  				regulator-name = "vbus_otg";
>  				interrupts = <IT_OCP_OTG 0>;
>  				interrupt-parent = <&pmic>;
> +				regulator-active-discharge = <1>;
>  			};
>  
>  			vbus_sw: pwr_sw2 {

Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

Thanks