linux-kernel - [PATCH] arm64: dts: verdin-imx8mm: add otg2 pd to usbphy

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Date:   Fri, 22 Jul 2022 09:55:59 +0200
From:   Philippe Schenker <dev@...henker.ch>
To:     Shawn Guo <shawnguo@...nel.org>
Cc:     Peter Chen <peter.chen@...nel.org>, linux-usb@...r.kernel.org,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Andrejs Cainikovs <andrejs.cainikovs@...adex.com>,
        Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: verdin-imx8mm: add otg2 pd to usbphy

From: Philippe Schenker <philippe.schenker@...adex.com>

The Verdin iMX8M Mini System on Module does not have VBUS signal
connected on Verdin USB_2 (usbotg2). On Verdin Development board this is
no problem, as we have connected a USB-Hub that is always connected.

However, if Verdin USB_2 is desired to be used as a single USB-Host port
the chipidea driver does not detect if a USB device is plugged into this
port, due to runtime pm shutting down the PHY.

Add the power-domain &pgc_otg2 to &usbphynop2 in order to detect
plugging events and enumerate the usb device.

Fixes: 6a57f224f734 ("arm64: dts: freescale: add initial support for verdin imx8m mini")
Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>

---

 arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
index eafa88d980b3..197da74837ca 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
@@ -737,6 +737,7 @@ &usbphynop1 {
 };
 
 &usbphynop2 {
+	power-domains = <&pgc_otg2>;
 	vcc-supply = <&reg_vdd_3v3>;
 };
 
-- 
2.37.1