On the LeMaker Banana Pi, probing the external ethernet PHY connected to the SoC's internal GMAC module sometimes fails. The PHY power supply is handled via a GPIO-controlled regulator, and the existing regulator startup-delay of 50000us is too short to make sure that the PHY is always fully powered up when it is queried by phylib. To guarantee a reliable PHY detection, the startup-delay has to be increased to 60000us.
Signed-off-by: Karsten Merker <[email protected]> --- arch/arm/boot/dts/sun7i-a20-bananapi.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/sun7i-a20-bananapi.dts b/arch/arm/boot/dts/sun7i-a20-bananapi.dts index 3de847d..36065d1 100644 --- a/arch/arm/boot/dts/sun7i-a20-bananapi.dts +++ b/arch/arm/boot/dts/sun7i-a20-bananapi.dts @@ -207,7 +207,7 @@ regulator-name = "gmac-3v3"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; - startup-delay-us = <50000>; + startup-delay-us = <60000>; enable-active-high; gpio = <&pio 7 23 0>; }; -- 1.7.10.4 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
