linux-kernel - [PATCH] arm64: dts: allwinner: a64: pine64-plus: Add PHY regulator delay

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Date:   Sun, 25 Aug 2019 15:03:36 +0200
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     mripard@...nel.org, wens@...e.org
Cc:     robh+dt@...nel.org, mark.rutland@....com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com,
        Ondrej Jirman <megous@...ous.com>
Subject: [PATCH] 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. It needs some 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@...ous.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts | 4 ++++
 1 file changed, 4 insertions(+)

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..9612a34c1762 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 +63,7 @@
 		reg = <1>;
 	};
 };
+
+&reg_dc1sw {
+	regulator-enable-ramp-delay = <100000>;
+};
-- 
2.23.0