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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCH] arm: aspeed: Add clock-names property to timer node
Date: Wed, 7 Jun 2017 14:52:56 +0200	[thread overview]
Message-ID: <20170607125256.GG2345@mai> (raw)
In-Reply-To: <CAK8P3a2d=T9igbhe1u3MBUF2F1TMLC7z0DQ2AmHX-LkiBAy2Ww@mail.gmail.com>

On Tue, Jun 06, 2017 at 11:41:11AM +0200, Arnd Bergmann wrote:
> On Mon, Jun 5, 2017 at 10:59 AM, Joel Stanley <joel@jms.id.au> wrote:
> > On Mon, Jun 5, 2017 at 5:18 PM, Andrew Jeffery <andrew@aj.id.au> wrote:
> >> The merging of a number of clocksource drivers into fttmr010 means we
> >> require clock-names to be specified in the Aspeed timer node, else the
> >> clocksource fails to probe and boot hangs.
> >
> > Arnd,
> >
> > Linus' reworked timer driver will go into 4.13.
> >
> > Can we get this patch merged into 4.12 as a fix so we don't end up
> > with a broken boot at any stage?
> 
> Hmm, can't we make the driver backward-compatible and have it fall
> back on the first clock if no clk named "PCLK" is found? Otherwise
> you still have an incompatible change in the DT binding and it will
> break if someone uses an older dtb with a newer kernel.

I would like to avoid to hack the kernel code for backward DT compatible
things.



-- 

 <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
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WARNING: multiple messages have this Message-ID (diff)
From: daniel.lezcano@linaro.org (Daniel Lezcano)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: aspeed: Add clock-names property to timer node
Date: Wed, 7 Jun 2017 14:52:56 +0200	[thread overview]
Message-ID: <20170607125256.GG2345@mai> (raw)
In-Reply-To: <CAK8P3a2d=T9igbhe1u3MBUF2F1TMLC7z0DQ2AmHX-LkiBAy2Ww@mail.gmail.com>

On Tue, Jun 06, 2017 at 11:41:11AM +0200, Arnd Bergmann wrote:
> On Mon, Jun 5, 2017 at 10:59 AM, Joel Stanley <joel@jms.id.au> wrote:
> > On Mon, Jun 5, 2017 at 5:18 PM, Andrew Jeffery <andrew@aj.id.au> wrote:
> >> The merging of a number of clocksource drivers into fttmr010 means we
> >> require clock-names to be specified in the Aspeed timer node, else the
> >> clocksource fails to probe and boot hangs.
> >
> > Arnd,
> >
> > Linus' reworked timer driver will go into 4.13.
> >
> > Can we get this patch merged into 4.12 as a fix so we don't end up
> > with a broken boot at any stage?
> 
> Hmm, can't we make the driver backward-compatible and have it fall
> back on the first clock if no clk named "PCLK" is found? Otherwise
> you still have an incompatible change in the DT binding and it will
> break if someone uses an older dtb with a newer kernel.

I would like to avoid to hack the kernel code for backward DT compatible
things.



-- 

 <http://www.linaro.org/> Linaro.org ? Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

  reply	other threads:[~2017-06-07 12:53 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-05  7:48 [PATCH] arm: aspeed: Add clock-names property to timer node Andrew Jeffery
2017-06-05  7:48 ` Andrew Jeffery
2017-06-05  8:59 ` Joel Stanley
2017-06-05  8:59   ` Joel Stanley
2017-06-05 21:11   ` Daniel Lezcano
2017-06-05 21:11     ` Daniel Lezcano
2017-06-06  2:18     ` Joel Stanley
2017-06-06  2:18       ` Joel Stanley
2017-06-06  9:41   ` Arnd Bergmann
2017-06-06  9:41     ` Arnd Bergmann
2017-06-07 12:52     ` Daniel Lezcano [this message]
2017-06-07 12:52       ` Daniel Lezcano
2017-06-07 14:29       ` Arnd Bergmann
2017-06-07 14:29         ` Arnd Bergmann
2017-06-08 13:26         ` Daniel Lezcano
2017-06-08 13:26           ` Daniel Lezcano
2017-06-08 14:34           ` Arnd Bergmann
2017-06-08 14:34             ` Arnd Bergmann
2017-06-09  7:30             ` [PATCH] arm: aspeed: Add Aspeed board file with clocksource devicetree fixup Andrew Jeffery
2017-06-09  7:30               ` Andrew Jeffery
2017-06-09  9:19               ` Arnd Bergmann
2017-06-09  9:19                 ` Arnd Bergmann
2017-06-09 12:52                 ` Andrew Jeffery
2017-06-09 12:52                   ` Andrew Jeffery
2017-06-20  8:06                   ` Linus Walleij
2017-06-20  8:06                     ` Linus Walleij
2017-06-20  9:26                     ` Jonas Jensen
2017-06-20  9:26                       ` Jonas Jensen
2017-06-09 13:44     ` [PATCH] arm: aspeed: Add clock-names property to timer node Linus Walleij
2017-06-09 13:44       ` Linus Walleij

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