From fe20bfa51c055e50f6abd1189397cfb3c425b402 Mon Sep 17 00:00:00 2001 From: Oleksandr Suvorov Date: Mon, 16 May 2022 15:47:20 +0200 Subject: ARM: dts: imx7-colibri: add delay for on-module phy supply There is a significant time required for PHY Micrel KSZ8041 to power up. Add a delay on start-up/wake-up before the FEC starts communicating with the PHY. LDO1 takes 6 ms, R39 + C44 takes ~100ms, the KSZ8041 datasheet asks for ~11 ms before starting any programming on the MIIM. Counting that, add a 200 ms delay to be sure the PHY is ready for programming. Also, add the same off delay time to give the capacitor time to discharge in order to properly reset. Signed-off-by: Oleksandr Suvorov Signed-off-by: Marcel Ziswiler Signed-off-by: Shawn Guo --- arch/arm/boot/dts/imx7-colibri.dtsi | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'arch/arm/boot/dts/imx7-colibri.dtsi') diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-colibri.dtsi index 329638985db6..09dbd262dad1 100644 --- a/arch/arm/boot/dts/imx7-colibri.dtsi +++ b/arch/arm/boot/dts/imx7-colibri.dtsi @@ -94,6 +94,17 @@ regulator-name = "+V3.3_AVDD_AUDIO"; }; + reg_module_3v3_eth: regulator-module-3v3-eth { + compatible = "regulator-fixed"; + off-on-delay-us = <200000>; + regulator-name = "+V3.3_ETH"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + startup-delay-us = <200000>; + vin-supply = <®_LDO1>; + }; + reg_usbh_vbus: regulator-usbh-vbus { compatible = "regulator-fixed"; gpio = <&gpio4 7 GPIO_ACTIVE_LOW>; /* SODIMM 129 / USBH_PEN */ @@ -153,7 +164,7 @@ fsl,magic-packet; phy-handle = <ðphy0>; phy-mode = "rmii"; - phy-supply = <®_LDO1>; + phy-supply = <®_module_3v3_eth>; pinctrl-names = "default", "sleep"; pinctrl-0 = <&pinctrl_enet1>; pinctrl-1 = <&pinctrl_enet1_sleep>; @@ -440,7 +451,7 @@ }; reg_LDO1: LDO1 { /* PWR_EN_+V3.3_ETH */ - regulator-min-microvolt = <1800000>; + regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-boot-on; }; -- cgit