linux-kernel - Re: [PATCH] phy: sun9i-usb: add USB dependency

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Date:	Mon, 30 Nov 2015 20:27:04 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Kishon Vijay Abraham I <kishon@...com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] phy: sun9i-usb: add USB dependency

Hi,

On Mon, Nov 30, 2015 at 7:29 PM, Arnd Bergmann <arnd@...db.de> wrote:
> The sun9i usb phy driver calls of_usb_get_phy_mode(), which is not
> available if USB is disabled:
>
> drivers/built-in.o: In function `sun9i_usb_phy_probe':
> :(.text+0x7fb0): undefined reference to `of_usb_get_phy_mode'
>
> This adds a dependency to avoid the randconfig build errors.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 9c3b44302636 ("phy: Add driver to support individual USB PHYs on sun9i")
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 7eb5859dd035..03cb3ea2d2c0 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -233,6 +233,7 @@ config PHY_SUN9I_USB
>         tristate "Allwinner sun9i SoC USB PHY driver"
>         depends on ARCH_SUNXI && HAS_IOMEM && OF
>         depends on RESET_CONTROLLER
> +       depends on USB_COMMON

USB_SUPPORT seems like the one to use. Some other phy drivers depend on this,
and so does drivers/usb/phy/of.c, which is where of_usb_get_phy_mode()
is located.

Thanks for catching this!


Regards
ChenYu

>         select GENERIC_PHY
>         help
>           Enable this to support the transceiver that is part of Allwinner
>
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