linux-kernel - Re: [PATCH v1 10/11] usb: misc: onboard_usb

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Message-ID: <Y7Xf/92iCHD5WhpA@google.com>
Date:   Wed, 4 Jan 2023 20:22:23 +0000
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-amlogic@...ts.infradead.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 10/11] usb: misc: onboard_usb_hub: add VIA LAB VL817Q7
 hub support

Hi Andand,

On Wed, Dec 28, 2022 at 10:03:19AM +0000, Anand Moon wrote:
> VIA LAB VL817Q7 is a 4-port USB 3.1 hub that has a reset pin to
> toggle and a 5.0V core supply exported though an integrated LDO is
> available for powering it.
> 
> Add the support for this hub, for controlling the reset pin and the core
> power supply.
> 
> Signed-off-by: Anand Moon <linux.amoon@...il.com>
> ---
>  drivers/usb/misc/onboard_usb_hub.c | 2 ++
>  drivers/usb/misc/onboard_usb_hub.h | 5 +++++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/usb/misc/onboard_usb_hub.c b/drivers/usb/misc/onboard_usb_hub.c
> index 699050eb3f17..025572019d16 100644
> --- a/drivers/usb/misc/onboard_usb_hub.c
> +++ b/drivers/usb/misc/onboard_usb_hub.c
> @@ -335,6 +335,7 @@ static struct platform_driver onboard_hub_driver = {
>  #define VENDOR_ID_MICROCHIP	0x0424
>  #define VENDOR_ID_REALTEK	0x0bda
>  #define VENDOR_ID_TI		0x0451
> +#define VENDOR_ID_VIA		0x2109
>  
>  /*
>   * Returns the onboard_hub platform device that is associated with the USB
> @@ -418,6 +419,7 @@ static const struct usb_device_id onboard_hub_id_table[] = {
>  	{ USB_DEVICE(VENDOR_ID_REALTEK, 0x5414) }, /* RTS5414 USB 2.1 */
>  	{ USB_DEVICE(VENDOR_ID_TI, 0x8140) }, /* TI USB8041 3.0 */
>  	{ USB_DEVICE(VENDOR_ID_TI, 0x8142) }, /* TI USB8041 2.0 */
> +	{ USB_DEVICE(VENDOR_ID_VIA, 0x0817) }, /* VIA VL817Q7 3.1 */

The VL817Q7 is a single IC, however like the TI USB8041 or the RTS5414 it
provides both a USB 3.1 and a USB 2.0 hub. You should also add an entry for
the USB 2.0 hub here.


>  	{}
>  };
>  MODULE_DEVICE_TABLE(usb, onboard_hub_id_table);
> diff --git a/drivers/usb/misc/onboard_usb_hub.h b/drivers/usb/misc/onboard_usb_hub.h
> index b32fad3a70f9..1fb3371ebdae 100644
> --- a/drivers/usb/misc/onboard_usb_hub.h
> +++ b/drivers/usb/misc/onboard_usb_hub.h
> @@ -26,6 +26,10 @@ static const struct onboard_hub_pdata genesys_gl850g_data = {
>  	.reset_us = 3,
>  };
>  
> +static const struct onboard_hub_pdata vialab_vl817q7_data = {
> +	.reset_us = 3,
> +};
> +
>  static const struct of_device_id onboard_hub_match[] = {
>  	{ .compatible = "usb424,2514", .data = &microchip_usb424_data, },
>  	{ .compatible = "usb451,8140", .data = &ti_tusb8041_data, },
> @@ -37,6 +41,7 @@ static const struct of_device_id onboard_hub_match[] = {
>  	{ .compatible = "usbbda,5411", .data = &realtek_rts5411_data, },
>  	{ .compatible = "usbbda,414", .data = &realtek_rts5411_data, },
>  	{ .compatible = "usbbda,5414", .data = &realtek_rts5411_data, },
> +	{ .compatible = "vialab,usb2109", .data = &vialab_vl817q7_data, },

ditto

Actually you added the device id entry for the 3.1 hub and a compatible string
of the 2.0 hub (or vice versa). Above the device id is 0x0817, here it is
0x2109. Please add both USB 3.1 and 2.0 and make sure the device id and the USB
version in the comment for the device id table match.