usb: chipidea: imx: enable OTG overcurrent in case USB subsystem is already started

[ Upstream commit 1dedbdf2bbb1ede8d96f35f9845ecae179dc1988 ]

When initializing the USB subsystem before starting the kernel,
OTG overcurrent detection is disabled. In case the OTG polarity of
overcurrent is low active, the overcurrent detection is never enabled
again and events cannot be reported as expected. Because imx usb
overcurrent polarity is low active by default, only detection needs
to be enable in usbmisc init function.

Signed-off-by: Nicolas Adell <nicolas.adell@actia.fr>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 9f4a0185dd609c09f6873f85b849c9553821dca1..b7477fd4443a3325c3e740203f47ff13bf94546e 100644 (file)
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -343,6 +343,8 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
        } else if (data->oc_polarity == 1) {
                /* High active */
                reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
+       } else {
+               reg &= ~(MX6_BM_OVER_CUR_DIS);
        }
        writel(reg, usbmisc->base + data->index * 4);