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authorJernej Skrabec <jernej.skrabec@siol.net>2019-09-09 20:42:35 +0200
committerMaxime Ripard <mripard@kernel.org>2019-09-30 22:12:02 +0200
commit2511366797fa6ab4a404b4b000ef7cd262aaafe8 (patch)
tree88f85ac328fe8b277c72d125b335d6c318296536 /arch/arm64
parentLinux 5.4-rc1 (diff)
downloadlinux-2511366797fa6ab4a404b4b000ef7cd262aaafe8.tar.xz
linux-2511366797fa6ab4a404b4b000ef7cd262aaafe8.zip
arm64: dts: allwinner: a64: pine64-plus: Add PHY regulator delay
Depending on kernel and bootloader configuration, it's possible that Realtek ethernet PHY isn't powered on properly. According to the datasheet, it needs 30ms to power up and then some more time before it can be used. Fix that by adding 100ms ramp delay to regulator responsible for powering PHY. Fixes: 94dcfdc77fc5 ("arm64: allwinner: pine64-plus: Enable dwmac-sun8i") Suggested-by: Ondrej Jirman <megous@megous.com> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
index 24f1aac366d6..d5b6e8159a33 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
@@ -63,3 +63,12 @@
reg = <1>;
};
};
+
+&reg_dc1sw {
+ /*
+ * Ethernet PHY needs 30ms to properly power up and some more
+ * to initialize. 100ms should be plenty of time to finish
+ * whole process.
+ */
+ regulator-enable-ramp-delay = <100000>;
+};