linux-kernel - [PATCH] arm64: dts: amlogic: odroid-n2: set usb-pwr-en regulator always on

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Date:   Sun, 16 Feb 2020 20:21:01 +0000
From:   Anand Moon <linux.amoon@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Jerome Brunet <jbrunet@...libre.com>
Subject: [PATCH] arm64: dts: amlogic: odroid-n2: set usb-pwr-en regulator always on

usb-pwr-en regulator is getting disable after booting, setting
regulator-alway-on help enable the regulator after booting.

[   31.766097] USB_PWR_EN: disabling

Fixes: c35f6dc5c377 (arm64: dts: meson: Add minimal support for Odroid-N2)
Cc: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: Jerome Brunet <jbrunet@...libre.com>
Cc: Neil Armstrong <narmstrong@...libre.com>
Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
Patch generated on top of my earier patch.
[0] https://patchwork.kernel.org/patch/11384531/
[1] https://patchwork.kernel.org/patch/11384533/

Before
[root@...rm ~]# cat /sys/kernel/debug/regulator/regulator_summary | grep USB
       USB_PWR_EN                 0    1      0 unknown  5000mV     0mA  5000mV  5000mV
After
[root@...rm ~]# cat /sys/kernel/debug/regulator/regulator_summary | grep USB
       USB_PWR_EN                 1    1      0 unknown  5000mV     0mA  5000mV  5000mV
---
 arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
index 23eddff85fe5..938a9e15adfc 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
@@ -177,6 +177,7 @@ usb_pwr_en: regulator-usb_pwr_en {
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		vin-supply = <&vcc_5v>;
+		regulator-always-on;
 
 		/* Connected to the microUSB port power enable */
 		gpio = <&gpio GPIOH_6 GPIO_ACTIVE_HIGH>;
-- 
2.25.0