linux-kernel - [PATCH 2/4] usb: chipidea: usbmisc: s32g: Add a REINIT_DURING

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Message-ID: <b1ddbc5993b2906cf916d023fdf27b07088a9672.1748453565.git.dan.carpenter@linaro.org>
Date: Wed, 28 May 2025 22:57:20 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Peter Chen <peter.chen@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux-usb@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Ghennadi Procopciuc <ghennadi.procopciuc@....com>, s32@....com,
	linaro-s32@...aro.org
Subject: [PATCH 2/4] usb: chipidea: usbmisc: s32g: Add a REINIT_DURING_RESUME
 flag

From: Ghennadi Procopciuc <ghennadi.procopciuc@....com>

The s32g2 and s32g3 chips will need to re-initialize in the resume path.
Add a REINIT_DURING_RESUME flag which will trigger the reinitialization.

Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@....com>
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/usb/chipidea/usbmisc_imx.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 118b9a68496b..95759a4ec60c 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -155,6 +155,9 @@
 					 BLKCTL_OTG_VBUS_WAKEUP_EN | \
 					 BLKCTL_OTG_DPDM_WAKEUP_EN)
 
+/* Flags for 'struct imx_usbmisc' */
+#define REINIT_DURING_RESUME	BIT(1)
+
 struct usbmisc_ops {
 	/* It's called once when probe a usb device */
 	int (*init)(struct imx_usbmisc_data *data);
@@ -171,6 +174,7 @@ struct usbmisc_ops {
 	/* It's called when system resume from usb power lost */
 	int (*power_lost_check)(struct imx_usbmisc_data *data);
 	void (*vbus_comparator_on)(struct imx_usbmisc_data *data, bool on);
+	u32 flags;
 };
 
 struct imx_usbmisc {
@@ -1266,6 +1270,9 @@ int imx_usbmisc_resume(struct imx_usbmisc_data *data, bool wakeup)
 
 	usbmisc = dev_get_drvdata(data->dev);
 
+	if ((usbmisc->ops->flags & REINIT_DURING_RESUME) && usbmisc->ops->init)
+		usbmisc->ops->init(data);
+
 	if (usbmisc->ops->power_lost_check)
 		ret = usbmisc->ops->power_lost_check(data);
 	if (ret > 0) {
-- 
2.47.2