diff options
| author | Marco Felsch <m.felsch@pengutronix.de> | 2023-08-16 20:25:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-22 15:44:52 +0300 |
| commit | 23e60c8daf5ec2ab1b731310761b668745fcf6ed (patch) | |
| tree | d725abbf2d4c312b4fe9b047ba101195baa182ff /include/linux/usb/tcpci.h | |
| parent | f23643306430f86e2f413ee2b986e0773e79da31 (diff) | |
| download | linux-23e60c8daf5ec2ab1b731310761b668745fcf6ed.tar.xz | |
usb: typec: tcpci: clear the fault status bit
According the "USB Type-C Port Controller Interface Specification v2.0"
the TCPC sets the fault status register bit-7
(AllRegistersResetToDefault) once the registers have been reset to
their default values.
This triggers an alert(-irq) on PTN5110 devices albeit we do mask the
fault-irq, which may cause a kernel hang. Fix this generically by writing
a one to the corresponding bit-7.
Cc: stable@vger.kernel.org
Fixes: 74e656d6b055 ("staging: typec: Type-C Port Controller Interface driver (tcpci)")
Reported-by: "Angus Ainslie (Purism)" <angus@akkea.ca>
Closes: https://lore.kernel.org/all/20190508002749.14816-2-angus@akkea.ca/
Reported-by: Christian Bach <christian.bach@scs.ch>
Closes: https://lore.kernel.org/regressions/ZR0P278MB07737E5F1D48632897D51AC3EB329@ZR0P278MB0773.CHEP278.PROD.OUTLOOK.COM/t/
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230816172502.1155079-1-festevam@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb/tcpci.h')
| -rw-r--r-- | include/linux/usb/tcpci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/tcpci.h b/include/linux/usb/tcpci.h index 85e95a3251d3..83376473ac76 100644 --- a/include/linux/usb/tcpci.h +++ b/include/linux/usb/tcpci.h @@ -103,6 +103,7 @@ #define TCPC_POWER_STATUS_SINKING_VBUS BIT(0) #define TCPC_FAULT_STATUS 0x1f +#define TCPC_FAULT_STATUS_ALL_REG_RST_TO_DEFAULT BIT(7) #define TCPC_ALERT_EXTENDED 0x21 |