[RFC] [PATCH] imx8mp: power-domain: force usb powerdomain off on startup

From: "Börge Strümpfel" <boerge.struempfel@gmail.com>
To: u-boot@lists.denx.de
Cc: marex@denx.de, jh80.chung@samsung.com, peng.fan@nxp.com,
	"Börge Strümpfel" <bstruempfel@ultratronik.de>
Subject: [RFC] [PATCH] imx8mp: power-domain: force usb powerdomain off on startup
Date: Thu, 15 Dec 2022 15:43:22 +0100	[thread overview]
Message-ID: <20221215144322.42895-1-bstruempfel@ultratronik.de> (raw)

This patch fixes a bug, where usb-ether is not usable, after an imx8mp
board has been booted using the uuu tool. In order to solve this, the usb
power domain is turned off during the probe of the imx8mp-hsiomix driver.
Thereby the usb controller is reset during startup and can operate
normally thereafter.

This was tested on an imx8mp-evk.

Signed-off-by: Boerge Struempfel <bstruempfel@ultratronik.de>
---
 drivers/power/domain/imx8mp-hsiomix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/power/domain/imx8mp-hsiomix.c b/drivers/power/domain/imx8mp-hsiomix.c
index 6a721a934a..a87595b8eb 100644
--- a/drivers/power/domain/imx8mp-hsiomix.c
+++ b/drivers/power/domain/imx8mp-hsiomix.c
@@ -116,6 +116,7 @@ static int imx8mp_hsiomix_probe(struct udevice *dev)
 	ret = power_domain_get_by_name(dev, &priv->pd_usb, "usb");
 	if (ret < 0)
 		goto err_pd_usb;
+	power_domain_off(&priv->pd_bus);
 
 	ret = power_domain_get_by_name(dev, &priv->pd_usb_phy1, "usb-phy1");
 	if (ret < 0)
-- 
2.25.1

