linux-kernel - Re: linux-next: Tree for Aug 30 (brcmfmac)

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Date:	Sat, 31 Aug 2013 20:40:33 +0200
From:	Hauke Mehrtens <hauke@...ke-m.de>
To:	Arend van Spriel <arend@...adcom.com>
CC:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Linux-Next <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	brcm80211-dev-list@...adcom.com,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: linux-next: Tree for Aug 30 (brcmfmac)

On 08/31/2013 08:21 PM, Arend van Spriel wrote:
> On 08/31/13 19:37, Geert Uytterhoeven wrote:
>> On Fri, Aug 30, 2013 at 11:12 PM, Randy Dunlap<rdunlap@...radead.org> 
>> wrote:
>>> This bool kconfig symbol:
>>>
>>> config BRCMFMAC_SDIO
>>>          bool "SDIO bus interface support for FullMAC driver"
>>>          depends on MMC
>>>
>>> allows BRCMFMAC_SDIO to be y even when MMC=m.
>>>
>>> Is there a reasonable solution to this?
> 
> Actually, BRCMFMAC should be built in same form as the MMC and/or USB,
> but only when BRCMFMAC_SDIO or BRCMFMAC_USB are selected.
> 
> So valid combinations are:
> MMC=m, USB=m, BRCMFMAC_SDIO=y, BRCMFMAC_USB=y => BRCMFMAC=m
> MMC=m, USB=y, BRCMFMAC_SDIO=y, BRCMFMAC_USB=y => BRCMFMAC=m
> MMC=y, USB=m, BRCMFMAC_SDIO=y, BRCMFMAC_USB=y => BRCMFMAC=m
> MMC=m, USB=y, BRCMFMAC_SDIO=y, BRCMFMAC_USB=n => BRCMFMAC=m
> MMC=m, USB=y, BRCMFMAC_SDIO=n, BRCMFMAC_USB=y => BRCMFMAC=m|y
> MMC=y, USB=m, BRCMFMAC_SDIO=y, BRCMFMAC_USB=n => BRCMFMAC=m|y
> MMC=y, USB=m, BRCMFMAC_SDIO=n, BRCMFMAC_USB=y => BRCMFMAC=m
> MMC=y, USB=y, BRCMFMAC_SDIO=y, BRCMFMAC_USB=y => BRCMFMAC=m|y
> MMC=y, USB=y, BRCMFMAC_SDIO=y, BRCMFMAC_USB=n => BRCMFMAC=m|y
> MMC=y, USB=y, BRCMFMAC_SDIO=n, BRCMFMAC_USB=y => BRCMFMAC=m|y
> 
> Not sure how to express the above.

This should be expressed with this Kconfig:

config BRCMFMAC_USB
	bool "USB bus interface support for FullMAC driver"
	depends on (USB = y || USB = BRCMFMAC)
	depends on BRCMFMAC

config BRCMFMAC_SDIO
	bool "SDIO bus interface support for FullMAC driver"
	depends on (MMC = y || MMC = BRCMFMAC)
	depends on BRCMFMAC
	select FW_LOADER

I haven't tested it, but we had a similar problem in b43 and fixed it
like this.

Hauke
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