linux-kernel - Re: [PATCH] phy: kconfig: add depends on "USB_SUPPORT" to OMAP_USB2 and TWL4030

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Date:	Wed, 27 Nov 2013 14:13:45 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	<balbi@...com>
CC:	<linux@....linux.org.uk>, <santosh.shilimkar@...com>,
	<gregkh@...uxfoundation.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] phy: kconfig: add depends on "USB_SUPPORT" to OMAP_USB2
 and TWL4030_USB

Hi,

On Tuesday 26 November 2013 09:24 PM, Felipe Balbi wrote:
> On Tue, Nov 26, 2013 at 03:31:55PM +0530, Kishon Vijay Abraham I wrote:
>> Fixes
>> warning: (OMAP_USB2 && TWL4030_USB) selects USB_PHY which has unmet
>> direct dependencies (USB_SUPPORT)
>> that shows up while disabling USB_SUPPORT from menuconfig.
>>
>> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
>> ---
>>  drivers/phy/Kconfig |    2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index a344f3d..0c87e4c 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -24,6 +24,7 @@ config PHY_EXYNOS_MIPI_VIDEO
>>  config OMAP_USB2
>>  	tristate "OMAP USB2 PHY Driver"
>>  	depends on ARCH_OMAP2PLUS
>> +	depends on USB_SUPPORT
>>  	select GENERIC_PHY
>>  	select USB_PHY
>>  	select OMAP_CONTROL_USB
>> @@ -36,6 +37,7 @@ config OMAP_USB2
>>  config TWL4030_USB
>>  	tristate "TWL4030 USB Transceiver Driver"
>>  	depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS
>> +	depends on USB_SUPPORT
> 
> The problem is actually the select below. Make this driver depend on
> GENERIC_PHY instead. Note that we have to remove that dependency soonish
> as this same IP is used as a SATA PHY.

the problem is actually the "select USB_PHY" after that. The *select* was added
in the later versions of the Generic PHY framework series after Greg expressed
his concerns on using *depends* [1]

I think this wouldn't be an issue when we have pipe3 driver adapted to generic
phy framework since it need not use *usb_phy* unlike omap-usb2 phy and twl4030
phy because of MUSB using the *xceiv*.

Thanks
Kishon

[1] -> https://lkml.org/lkml/2013/7/17/520
> 

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