linux-kernel - Re: [V4 1/2] phy: ralink-usb: add driver for Mediatek/Ralink

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Date:   Thu, 10 Aug 2017 17:00:17 +0100
From:   Harvey Hunt <Harvey.Hunt@...tec.com>
To:     James Hogan <james.hogan@...tec.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <matthias.bgg@...il.com>, <kishon@...com>
CC:     John Crispin <john@...ozen.org>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [V4 1/2] phy: ralink-usb: add driver for Mediatek/Ralink

Hi James,

On 09/08/17 23:23, James Hogan wrote:
> On 9 August 2017 10:35:39 BST, Harvey Hunt <harvey.hunt@...tec.com> wrote:
>> From: John Crispin <john@...ozen.org>
>>
>> Add a driver to setup the USB phy on Mediatek/Ralink SoCs.
>> The driver is trivial and only sets up power and host mode.
>>
>> Signed-off-by: John Crispin <john@...ozen.org>
>> Signed-off-by: Harvey Hunt <harvey.hunt@...tec.com>
>> Cc: linux-kernel@...r.kernel.org
>> Cc: linux-mediatek@...ts.infradead.org
>> ---
>> Changes in V4
>> * Remove Allwinner from comment
>> * Depend on COMPILE_TEST
>>
>> Changes in V3
>> * Separate DT bindings
>> * Update Kconfig text
>> * Modify John's email address
>> * Rebase onto v4.13-rc3
>>
>> Changes in V2
>> * remove refcounting
>> * drop empty functions
>> * dont use static globals
>> * use explicit compatible strings
>>
>> drivers/phy/Kconfig          |   8 ++
>> drivers/phy/Makefile         |   1 +
>> drivers/phy/phy-ralink-usb.c | 173
>> +++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 182 insertions(+)
>> create mode 100644 drivers/phy/phy-ralink-usb.c
>>
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index c1807d4..8fb5260 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -41,6 +41,14 @@ config PHY_PISTACHIO_USB
>> 	help
>> 	  Enable this to support the USB2.0 PHY on the IMG Pistachio SoC.
>>
>> +config PHY_RALINK_USB
>> +	tristate "Ralink USB PHY driver"
>> +	select GENERIC_PHY
>> +	depends on RALINK || COMPILE_TEST
> 
> given that the driver includes a asm/mach-ralink header, the COMPILE_TEST bit may break x86 allmodconfig?
> 
> maybe the header should be moved out of arch/mips or it should depend on MIPS only (so a mips allmodconfig catches it, but cant be enabled on x86 even with COMPILE_TEST=y)
> 
> cheers
> James
> 
[...]

Well spotted - the build does indeed fail for ARCH=x86 allmodconfig.

I could either use:

depends on RALINK || (COMPILE_TEST && MIPS)

or just drop the COMPILE_TEST altogether, as I don't know how many 
people are running compile test only on MIPS.

Thanks,

Harvey