From dff503ab76b4af30f064d45198e9ff6b35e8655d Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 22 Apr 2020 12:45:54 +0200 Subject: [PATCH] ARM: dts: stm32: Repair PMIC configuration on AV96 The vdd PMIC buck regulator was 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 add missing Enpirion regulator for the IO voltage into the DT. Signed-off-by: Marek Vasut Cc: Alexandre Torgue Cc: Manivannan Sadhasivam Cc: Maxime Coquelin Cc: Patrice Chotard Cc: Patrick Delaunay Cc: linux-stm32@st-md-mailman.stormreply.com To: linux-arm-kernel@lists.infradead.org Signed-off-by: Alexandre Torgue --- arch/arm/boot/dts/stm32mp157a-avenger96.dts | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/arch/arm/boot/dts/stm32mp157a-avenger96.dts b/arch/arm/boot/dts/stm32mp157a-avenger96.dts index aba38950..380ce14 100644 --- a/arch/arm/boot/dts/stm32mp157a-avenger96.dts +++ b/arch/arm/boot/dts/stm32mp157a-avenger96.dts @@ -77,6 +77,17 @@ default-state = "off"; }; }; + + /* 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 { @@ -166,8 +177,8 @@ vdd: buck3 { regulator-name = "vdd"; - regulator-min-microvolt = <3300000>; - regulator-max-microvolt = <3300000>; + regulator-min-microvolt = <2900000>; + regulator-max-microvolt = <2900000>; regulator-always-on; regulator-initial-mode = <0>; regulator-over-current-protection; @@ -245,6 +256,7 @@ regulator-name = "vbus_otg"; interrupts = ; interrupt-parent = <&pmic>; + regulator-active-discharge = <1>; }; vbus_sw: pwr_sw2 { @@ -275,7 +287,7 @@ }; &pwr_regulators { - vdd-supply = <&vdd>; + vdd-supply = <&vdd_io>; vdd_3v3_usbfs-supply = <&vdd_usb>; }; -- 2.7.4