On Tue, Jun 22, 2021 at 05:14:54PM +0300, Hannu Hartikainen wrote:
> The device (32a7:0000 Heimann Sensor GmbH USB appset demo) claims to be
> a CDC-ACM device in its descriptors but in fact is not. If it is run
> with echo disabled it returns garbled data, probably due to something
> that happens in the TTY layer. And when run with echo enabled (the
> default), it will mess up the calibration data of the sensor the first
> time any data is sent to the device.
>
> In short, I had a bad time after connecting the sensor and trying to get
> it to work. I hope blacklisting it in the cdc-acm driver will save
> someone else a bit of trouble.
>
> Signed-off-by: Hannu Hartikainen <hannu@xxxxxxx>
> ---
>
> This is my first time submitting a patch. I hope I'll be able to submit
> a driver for this device later. The device is a microcontroller-based
> USB implementation/converter for a thermal camera that communicates over
> SPI.
>
> drivers/usb/class/cdc-acm.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
> index ca7a61190dd9..d50b606d09aa 100644
> --- a/drivers/usb/class/cdc-acm.c
> +++ b/drivers/usb/class/cdc-acm.c
> @@ -1959,6 +1959,11 @@ static const struct usb_device_id acm_ids[] = {
> .driver_info = IGNORE_DEVICE,
> },
>
> + /* Exclude Heimann Sensor GmbH USB appset demo */
> + { USB_DEVICE(0x32a7, 0x0000),
> + .driver_info = IGNORE_DEVICE,
> + },
> +
If it's blacklisted here, what driver does control this device?
thanks,
greg k-h
