diff options
| author | Oleksandr Suvorov <oleksandr.suvorov@toradex.com> | 2021-06-17 12:11:24 +0300 |
|---|---|---|
| committer | Philippe Schenker <philippe.schenker@toradex.com> | 2021-06-24 07:24:02 +0000 |
| commit | 73a9a57a761090870683bc7d2aa08156f771712e (patch) | |
| tree | c403d3fb61c6495cf373e3a5bbef8cf575778c80 /arch/arm/boot/dts/imx7-colibri.dtsi | |
| parent | b6f784f9ead1f42b87f852124fb16ba94735755b (diff) | |
ARM: dts: colibri-imx7: add delay for on-module PHY
There is a significant time for PHY Micrel KSZ8041 to get up.
Add delay on startup/wakeup before FEC starts communicating with PHY.
LDO1 takes 6ms, R39+C44 takes ~100ms, KSZ8041 datasheet asks for
~11ms before starting programming on the MIIM.
Counting that, add a 200ms 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.
Related-to: ELB-3963
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Diffstat (limited to 'arch/arm/boot/dts/imx7-colibri.dtsi')
| -rw-r--r-- | arch/arm/boot/dts/imx7-colibri.dtsi | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-colibri.dtsi index faa998a75f15..348d98e110fc 100644 --- a/arch/arm/boot/dts/imx7-colibri.dtsi +++ b/arch/arm/boot/dts/imx7-colibri.dtsi @@ -45,6 +45,17 @@ regulator-always-on; }; + 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>; + }; + reserved-memory { #address-cells = <1>; #size-cells = <1>; @@ -122,7 +133,7 @@ assigned-clock-parents = <&clks IMX7D_PLL_ENET_MAIN_100M_CLK>; assigned-clock-rates = <0>, <100000000>; phy-mode = "rmii"; - phy-supply = <®_LDO1>; + phy-supply = <®_module_3v3_eth>; fsl,magic-packet; phy-handle = <ðphy0>; @@ -408,7 +419,7 @@ }; reg_LDO1: LDO1 { /* PWR_EN_+V3.3_ETH */ - regulator-min-microvolt = <1800000>; + regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-boot-on; }; |