diff options
| author | Amelie Delaunay <amelie.delaunay@foss.st.com> | 2021-12-07 13:45:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-15 18:43:24 +0100 |
| commit | fac6bf87c55f7f0733efb0375565fb6a50cf2caf (patch) | |
| tree | d71fc894bd50fecefc151721df553ab46edb8c3c /drivers/usb/dwc2 | |
| parent | f08adf5add9a071160c68bb2a61d697f39ab0758 (diff) | |
| download | linux-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.c | 3 |
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); |