arm64: dts: apalis-imx8: remove fec regulator

Despite this being present on the hardware, remove it from the
device tree.
If this is present then the fec does power-off the regulator when going
into suspend. This leads to a non working phy after resume due to the
reset line that is not triggered. We try to fix this upstream but this
seems to become a bigger task so introduce this intermediate solution
of just removing the regulator.

According to the KSZ9131 datasheet, the power-consumption in software
power-down is about 26mW.

Related-to: ELB-4251
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>

1 files changed, 0 insertions, 19 deletions

diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
index 2cba7b82de48..442c1afee771 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
@@ -94,24 +94,6 @@
 			};
 		};
 
-		/*
-		 * Power management bus used for powering down phy in suspend
-		 *
-		 * Power management bus used to control LDO4OUT of the
-		 * first PMIC PF8100 from SCFW using IMX_SC_R_BOARD_R0 (+3.3V_ETH)
-		 */
-		reg_fec_supply: regulator-fec-supply {
-			compatible = "regulator-fixed";
-			regulator-name = "+V3.3_ETH (LDO4)";
-			regulator-min-microvolt = <3300000>;
-			regulator-max-microvolt = <3300000>;
-			power-domains = <&pd IMX_SC_R_BOARD_R0>;
-
-			regulator-state-mem {
-				regulator-off-in-suspend;
-			};
-		};
-
 		reg_module_3v3: regulator-module-3v3 {
 			compatible = "regulator-fixed";
 			regulator-name = "+V3.3";
@@ -308,7 +290,6 @@
 	fsl,magic-packet;
 	fsl,mii-exclusive;
 
-	phy-supply = <&reg_fec_supply>;
 	phy-handle = <&ethphy0>;
 	phy-mode = "rgmii-id";