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| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-11-22 22:38:22 +0530 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2021-01-21 10:49:45 +0100 |
| commit | 5f6225a7fb2c863ca40ca282478933c0afdb3512 (patch) | |
| tree | 328393c1e9c8def5411dd09ada8ca2dc86a6e92d /drivers/usb/class/cdc-acm.c | |
| parent | c2d405aa86b451f197ee95cb08887130b86b765e (diff) | |
| download | linux-5f6225a7fb2c863ca40ca282478933c0afdb3512.tar.gz | |
USB: cdc-acm: ignore Exar XR21V141X when serial driver is built
The Exar XR21V141X can be used in either ACM mode using the cdc-acm
driver or in "custom driver" mode in which further features such as
hardware and software flow control, GPIO control and in-band line-status
reporting are available.
In ACM mode the device always enables RTS/CTS flow control, something
which could prevent transmission in case the CTS input isn't wired up
correctly.
Ensure that cdc_acm will not bind to the device if the custom USB-serial
driver is enabled.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20201122170822.21715-4-mani@kernel.org
[ johan: rewrite commit message ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 781905745812ea..37f824b59daae8 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1901,6 +1901,12 @@ static const struct usb_device_id acm_ids[] = { }, #endif +#if IS_ENABLED(CONFIG_USB_SERIAL_XR) + { USB_DEVICE(0x04e2, 0x1410), /* Ignore XR21V141X USB to Serial converter */ + .driver_info = IGNORE_DEVICE, + }, +#endif + /*Samsung phone in firmware update mode */ { USB_DEVICE(0x04e8, 0x685d), .driver_info = IGNORE_DEVICE, |