linux-kernel - [PATCH 1/6] arm64: dts: rockchip: Fix rk3399-roc-pc pwm2 pin

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Date:   Thu, 19 Sep 2019 10:58:17 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Heiko Stuebner <heiko@...ech.de>, Levin Du <djw@...hip.com.cn>,
        Akash Gajjar <akash@...nedev.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Da Xue <da@...sconfused.com>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-amarula@...rulasolutions.com,
        Jagan Teki <jagan@...rulasolutions.com>
Subject: [PATCH 1/6] arm64: dts: rockchip: Fix rk3399-roc-pc pwm2 pin

ROC-PC is not able to boot linux console if PWM2_d is
unattached to any pinctrl logic.

To be precise the linux boot hang with last logs as,
...
.....
[    0.003367] Console: colour dummy device 80x25
[    0.003788] printk: console [tty0] enabled
[    0.004178] printk: bootconsole [uart8250] disabled

In ROC-PC the PWM2_d pin is connected to LOG_DVS_PWM of
VDD_LOG. So, for normal working operations this needs to
active and pull-down.

This patch fix, by attaching pinctrl active and pull-down
the pwm2.

Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
index 19f7732d728c..c53f3d571620 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
@@ -548,6 +548,8 @@
 };
 
 &pwm2 {
+	pinctrl-names = "active";
+	pinctrl-0 = <&pwm2_pin_pull_down>;
 	status = "okay";
 };
 
-- 
2.18.0.321.gffc6fa0e3