USB: serial: cp210x: add Silicon Labs IDs for Windows Update

[Johan Hovold <johan@kernel.org>]

On Sat, Jun 09, 2018 at 01:26:08PM +0200, Karoly Pados wrote:
> Silicon Labs defines alternative VID/PID pairs for some chips that when
> used will automatically install drivers for Windows users without manual
> intervention. Unfortunately, these IDs are not recognized by the Linux
> module, so using these IDs improves user experience on one platform but
> degrades it on Linux. This patch addresses this problem.

How does this work; do these chips now come with the "windows update"
PIDs, and the silabs drivers then reprogram them to use other PIDs once
installed?

Is this documented somewhere?

> Now with mailing list in CC.

This kind of revision information should go below the cut-off line (---)
below. I'll just remove it this time unless there's a resend.

> Signed-off-by: Karoly Pados <pados@pados.hu>
> ---
>  drivers/usb/serial/cp210x.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
> index eb6c26cbe579..b1849f657e01 100644
> --- a/drivers/usb/serial/cp210x.c
> +++ b/drivers/usb/serial/cp210x.c
> @@ -143,8 +143,11 @@ static const struct usb_device_id id_table[] = {
>  	{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
>  	{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
>  	{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
> +	{ USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs values for Windows Update support (CP2101-4/CP2102N) */

I may shorten this somewhat.

>  	{ USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
>  	{ USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
> +	{ USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs values for Windows Update support (CP2105) */
> +	{ USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs values for Windows Update support (CP2108) */
>  	{ USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
>  	{ USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
>  	{ USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */

Thanks,
Johan
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