@@ -91,6 +91,17 @@ sd_switch: regulator-sd_switch {
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 {
@@ -178,7 +189,7 @@ regulators {
vddcore: buck1 {
regulator-name = "vddcore";
- regulator-min-microvolt = <1200000>;
+ regulator-min-microvolt = <800000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-initial-mode = <0>;
@@ -196,8 +207,8 @@ vdd_ddr: buck2 {
vdd: buck3 {
regulator-name = "vdd";
- regulator-min-microvolt = <3300000>;
- regulator-max-microvolt = <3300000>;
+ regulator-min-microvolt = <2900000>;
+ regulator-max-microvolt = <2900000>;
regulator-always-on;
regulator-initial-mode = <0>;
regulator-over-current-protection;
@@ -275,6 +286,7 @@ vbus_otg: pwr_sw1 {
regulator-name = "vbus_otg";
interrupts = <IT_OCP_OTG 0>;
interrupt-parent = <&pmic>;
+ regulator-active-discharge = <1>;
};
vbus_sw: pwr_sw2 {
@@ -305,7 +317,7 @@ &iwdg2 {
};
&pwr_regulators {
- vdd-supply = <&vdd>;
+ vdd-supply = <&vdd_io>;
vdd_3v3_usbfs-supply = <&vdd_usb>;
};
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. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Alexandre Torgue <alexandre.torgue@st.com> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Patrice Chotard <patrice.chotard@st.com> Cc: Patrick Delaunay <patrick.delaunay@st.com> Cc: linux-stm32@st-md-mailman.stormreply.com To: linux-arm-kernel@lists.infradead.org --- V2: Model the Enpirion EP53A8LQI on the DHCOR SoM as a fixed regulator --- arch/arm/boot/dts/stm32mp157a-avenger96.dts | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-)