linux-kernel - [PATCH] arm64: dts: fsl: librem5: Limit the USB to 5V

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Message-Id: <20190620170439.18762-1-angus@akkea.ca>
Date:   Thu, 20 Jun 2019 11:04:39 -0600
From:   "Angus Ainslie (Purism)" <angus@...ea.ca>
To:     angus.ainslie@...i.sm
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        Pavel Machek <pavel@....cz>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: fsl: librem5: Limit the USB to 5V

The charge controller can handle 14V but the PTC on the devkit can only
handle 6V so limit the negotiated voltage to 5V.

Signed-off-by: Angus Ainslie (Purism) <angus@...ea.ca>
---
 arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
index 3f4736fd3cea..ec85ada77955 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
@@ -353,7 +353,7 @@
 			sink-pdos = <PDO_FIXED(5000, 2000, PDO_FIXED_USB_COMM |
 				PDO_FIXED_DUAL_ROLE |
 				PDO_FIXED_DATA_SWAP )
-			     PDO_VAR(5000, 12000, 2000)>;
+			     PDO_VAR(5000, 3000, 3000)>;
 			op-sink-microwatt = <10000000>;
 
 			ports {
-- 
2.17.1