Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

From: Felipe Balbi <balbi@ti.com>
To: Stephen Boyd <sboyd@codeaurora.org>
Cc: balbi@ti.com, "Ivan T. Ivanov" <iivanov@mm-sol.com>,
	gregkh@linuxfoundation.org, rob.herring@calxeda.com,
	pawel.moll@arm.com, mark.rutland@arm.com, swarren@wwwdotorg.org,
	ijc+devicetree@hellion.org.uk, davidb@codeaurora.org,
	linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-kernel@vger.kernel.org, Daniel Walker <dwalker@fifo99.com>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data
Date: Fri, 27 Dec 2013 12:44:34 -0600	[thread overview]
Message-ID: <20131227184434.GG7819@saruman.home> (raw)
In-Reply-To: <52BDC58E.2040101@codeaurora.org>

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On Fri, Dec 27, 2013 at 10:23:10AM -0800, Stephen Boyd wrote:
> On 12/27/13 10:10, Felipe Balbi wrote:
> > Hi,
> >
> > On Tue, Nov 12, 2013 at 04:51:36PM +0200, Ivan T. Ivanov wrote:
> >> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> >>
> >> This patch fix compilation error when driver is compiled
> >> in multi-platform builds.
> >>
> >> drivers/built-in.o: In function `msm_otg_link_clk_reset':
> >> ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
> >> ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
> >>
> >> Use platform data supplied reset handlers and adjust error
> >> messages reported when reset sequence fail.
> >>
> >> This is an intermediate step before adding support for reset
> >> framework and newer targets.
> >>
> >> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> >> Acked-by: David Brown <davidb@codeaurora.org>
> >> Cc: Daniel Walker <dwalker@fifo99.com>
> >> Cc: Felipe Balbi <balbi@ti.com>
> >> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > this really looks like you should be using reset framework
> > (drivers/reset/), then your phy driver would simply reset_assert() and
> > reset_deassert().
> >
> 
> Unfortunately the reset framework is a DT only framework and there are
> still non-DT platforms within mach-msm. Arnd suggested we push the
> non-DT reset code down into the mach directory in the meantime. We're in
> the process of adding the reset framework to DT enabled MSM platforms,
> hopefully those get merged in 3.14.

And this is why the ARM port is in such a messy situation. It's always
better to "push things into the mach- directory" than improving existing
frameworks to cope with wild ARM SoCs.

fell free to push this through your tree. It _does_ make the PHY driver
slightly better and probably buildable on other arches with
COMPILE_TEST.

Still, I *really* want to see this switching over to reset framework on
v3.16.

cheers

ps: for this patch only you can have my

Acked-by: Felipe Balbi <balbi@ti.com>

-- 
balbi

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