Hi Marek and Pascal,
From: Marek Vasut marex@denx.de Sent: mardi 31 mars 2020 19:52
The core and vdd PMIC buck regulators were misconfigured, which caused instability of the board and malfunction of high-speed interfaces, like the RGMII. Configure the PMIC correctly to repair these problems. Also, model the missing Enpirion EP53A8LQI on the DHCOR SoM as a fixed regulator.
Reviewed-by: Patrice Chotard patrice.chotard@st.com Signed-off-by: Marek Vasut marex@denx.de Cc: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Cc: Patrick Delaunay patrick.delaunay@st.com Cc: Patrice Chotard patrice.chotard@st.com
V2: - Model the Enpirion EP53A8LQI on the DHCOR SoM as a fixed regulator - Adjust the PMIC voltages further V3: No change
arch/arm/dts/stm32mp157a-avenger96.dts | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/arch/arm/dts/stm32mp157a-avenger96.dts b/arch/arm/dts/stm32mp157a-avenger96.dts index 8181d1fa05..97ff40144e 100644 --- a/arch/arm/dts/stm32mp157a-avenger96.dts +++ b/arch/arm/dts/stm32mp157a-avenger96.dts @@ -91,6 +91,17 @@ states = <1800000 0x1>, <2900000 0x0>; };
- /* Enpirion EP3A8LQI U2 on the DHCOR */
- vdd_io: regulator-buck-io {
compatible = "regulator-fixed";regulator-name = "buck-io";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-always-on;regulator-boot-on;vin-supply = <&vdd>;- };
};
ðernet0 { @@ -167,7 +178,7 @@
vddcore: buck1 { regulator-name = "vddcore";
regulator-min-microvolt = <1200000>;
regulator-min-microvolt = <800000>;
I don't understood this modification, If I correctly remember, on STM32MP15x On ST boards, we set this value to 1200000 to protect VDDCORE on SOC (it is not allowed to be reduce lower than 1,2V.
0.8V is the minimal supported voltage by STPMIC but not the minal expected VDDCORE.
regulator-max-microvolt = <1350000>; regulator-always-on; regulator-initial-mode = <0>;@@ -185,8 +196,8 @@
vdd: buck3 { regulator-name = "vdd";
regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;
regulator-min-microvolt = <2900000>;regulator-max-microvolt = <2900000>; regulator-always-on; st,mask_reset; regulator-initial-mode = <0>;@@ -268,6 +279,7 @@ regulator-name = "vbus_otg"; interrupts = <IT_OCP_OTG 0>; interrupt-parent = <&pmic>;
regulator-active-discharge = <1>;
It seems this setting introduced other-consumption, it should not be used.
}; vbus_sw: pwr_sw2 {@@ -304,7 +316,7 @@ };
&pwr_regulators {
- vdd-supply = <&vdd>;
- vdd-supply = <&vdd_io>; vdd_3v3_usbfs-supply = <&vdd_usb>;
};
-- 2.25.1
I let Pascal complete my first feedback or react on the Linux upstream.
Patrick