linux-kernel - Re: [PATCH] extcon: usbc-tusb320: add USB_ROLE

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Date:   Thu, 23 Mar 2023 23:19:00 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Arnd Bergmann <arnd@...nel.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] extcon: usbc-tusb320: add USB_ROLE_SWITCH dependency

On 23. 3. 22. 20:16, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> When CONFIG_USB_ROLE_SWITCH=m, tusb320 cannot be built-in:
> 
> ld.lld: error: undefined symbol: fwnode_usb_role_switch_get
>>>> referenced by extcon-usbc-tusb320.c
>>>>               drivers/extcon/extcon-usbc-tusb320.o:(tusb320_probe) in archive vmlinux.a
> ld.lld: error: undefined symbol: usb_role_switch_set_role
>>>> referenced by extcon-usbc-tusb320.c
>>>>               drivers/extcon/extcon-usbc-tusb320.o:(tusb320_state_update_handler) in archive vmlinux.a
> 
> Add the appropriate Kconfig dependency to prevent this
> configuration but still allow the driver to be built-in
> when USB_ROLE_SWITCH is disabled.
> 
> Fixes: 19685ae43489 ("extcon: usbc-tusb320: add usb_role_switch support")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/extcon/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
> index 290186e44e6b..0ef1971d22bb 100644
> --- a/drivers/extcon/Kconfig
> +++ b/drivers/extcon/Kconfig
> @@ -185,6 +185,7 @@ config EXTCON_USBC_TUSB320
>  	tristate "TI TUSB320 USB-C extcon support"
>  	depends on I2C && TYPEC
>  	select REGMAP_I2C
> +	depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
>  	help
>  	  Say Y here to enable support for USB Type C cable detection extcon
>  	  support using a TUSB320.

Applied it. Thanks.

-- 
Best Regards,
Samsung Electronics
Chanwoo Choi