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authorAmelie Delaunay <amelie.delaunay@foss.st.com>2021-12-07 13:45:10 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-15 18:43:24 +0100
commitfac6bf87c55f7f0733efb0375565fb6a50cf2caf (patch)
treed71fc894bd50fecefc151721df553ab46edb8c3c /drivers/usb/dwc2
parentf08adf5add9a071160c68bb2a61d697f39ab0758 (diff)
downloadlinux-fac6bf87c55f7f0733efb0375565fb6a50cf2caf.tar.bz2
usb: dwc2: fix STM ID/VBUS detection startup delay in dwc2_driver_probe
When activate_stm_id_vb_detection is enabled, ID and Vbus detection relies on sensing comparators. This detection needs time to stabilize. A delay was already applied in dwc2_resume() when reactivating the detection, but it wasn't done in dwc2_probe(). This patch adds delay after enabling STM ID/VBUS detection. Then, ID state is good when initializing gadget and host, and avoid to get a wrong Connector ID Status Change interrupt. Fixes: a415083a11cc ("usb: dwc2: add support for STM32MP15 SoCs USB OTG HS and FS") Cc: stable <stable@vger.kernel.org> Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20211207124510.268841-1-amelie.delaunay@foss.st.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/platform.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index c8f18f3ba9e3..c331a5128c2c 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -575,6 +575,9 @@ static int dwc2_driver_probe(struct platform_device *dev)
ggpio |= GGPIO_STM32_OTG_GCCFG_IDEN;
ggpio |= GGPIO_STM32_OTG_GCCFG_VBDEN;
dwc2_writel(hsotg, ggpio, GGPIO);
+
+ /* ID/VBUS detection startup time */
+ usleep_range(5000, 7000);
}
retval = dwc2_drd_init(hsotg);