linux-kernel - Re: [PATCH] USB: serial: option: add Fibocom FM135-GL variants

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Date: Wed, 6 Mar 2024 12:55:42 +0700
From: Lars Melin <larsm17@...il.com>
To: bolan wang <bolan.wang@...ocom.com>, johan@...nel.org,
 gregkh@...uxfoundation.org
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: serial: option: add Fibocom FM135-GL variants

On 2024-03-06 09:13, bolan wang wrote:
> Update the USB serial option driver support for the Fibocom
> FM135-GL
> LTE modules as there are actually several different variants.
> - VID:PID 2cb7:01a1, FM135-GL are laptop M.2 cards (with
> MBIM interfaces for /Linux/Chrome OS)
> - VID:PID 2cb7:0115, FM135-GL for laptop debug M.2 cards(with adb
> interface for /Linux/Chrome OS)
> 
> 0x01a1: mbim
> 0x0115: mbim, diag, at, pipe, adb
> 
> Signed-off-by: bolan wang <bolan.wang@...ocom.com>
> ---
>   drivers/usb/serial/option.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
> index 2ae124c49d44..0981b8d8020c 100644
> --- a/drivers/usb/serial/option.c
> +++ b/drivers/usb/serial/option.c
> @@ -2267,7 +2267,9 @@ static const struct usb_device_id option_ids[] = {
>   	{ USB_DEVICE_AND_INTERFACE_INFO(0x2cb7, 0x010b, 0xff, 0xff, 0x30) },	/* Fibocom FG150 Diag */
>   	{ USB_DEVICE_AND_INTERFACE_INFO(0x2cb7, 0x010b, 0xff, 0, 0) },		/* Fibocom FG150 AT */
>   	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x0111, 0xff) },			/* Fibocom FM160 (MBIM mode) */
> +	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x0115, 0xff) },			/* Fibocom FM135 (laptop MBIM) */
>   	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a0, 0xff) },			/* Fibocom NL668-AM/NL652-EU (laptop MBIM) */
> +	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a1, 0xff) },			/* Fibocom FM135-GL (MBIM mode) */
>   	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a2, 0xff) },			/* Fibocom FM101-GL (laptop MBIM) */
>   	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a3, 0xff) },			/* Fibocom FM101-GL (laptop MBIM) */
>   	{ USB_DEVICE_INTERFACE_CLASS(0x2cb7, 0x01a4, 0xff),			/* Fibocom FM101-GL (laptop MBIM) */

If the device with pid 0x01a1 only has an mbim interface as you have 
indicated then why do you add it to the option serial driver?

thanks
Lars