linux-kernel - [PATCH 1/1] arm64: dts: rockchip: correct voltage selector Firefly-RK3399

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Date:   Mon,  4 Jun 2018 19:15:23 +0200
From:   Heinrich Schuchardt <xypron.glpk@....de>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Vagrant Cascadian <vagrant@...ian.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Pierre-Hugues Husson <phh@....me>,
        Jianqun Xu <jay.xu@...k-chips.com>,
        Kever Yang <kever.yang@...k-chips.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 1/1] arm64: dts: rockchip: correct voltage selector Firefly-RK3399

Without this patch the Firefly-RK3399 board boot process hangs after these
lines:

   fan53555-regulator 0-0040: FAN53555 Option[8] Rev[1] Detected!
   fan53555-reg: supplied by vcc_sys
   vcc1v8_s3: supplied by vcc_1v8

Blacklisting driver fan53555 allows booting.

The device tree uses a value of fcs,suspend-voltage-selector different to
any other board.

Changing this setting to the usual value is sufficient to enable booting.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
---
 arch/arm64/boot/dts/rockchip/rk3399-firefly.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
index 4f28628aa091..50940ef844a7 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
@@ -458,7 +458,7 @@
 	vdd_cpu_b: regulator@40 {
 		compatible = "silergy,syr827";
 		reg = <0x40>;
-		fcs,suspend-voltage-selector = <0>;
+		fcs,suspend-voltage-selector = <1>;
 		regulator-name = "vdd_cpu_b";
 		regulator-min-microvolt = <712500>;
 		regulator-max-microvolt = <1500000>;
-- 
2.17.1