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

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Date:   Wed, 22 Mar 2023 13:05:36 +0000
From:   Alvin Šipraga <ALSI@...g-olufsen.dk>
To:     Arnd Bergmann <arnd@...nel.org>
CC:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] extcon: usbc-tusb320: add USB_ROLE_SWITCH dependency

On Wed, Mar 22, 2023 at 12:16:51PM +0100, 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>
> ---

I overlooked this possibility, my bad... Thanks Arnd for fixing!

Reviewed-by: Alvin Šipraga <alsi@...g-olufsen.dk>