linux-kernel - Re: [PATCH v5 06/10] clk: mediatek: mt8173: Fix enabling of critical clocks

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Message-ID: <20150730002754.GG3159@codeaurora.org>
Date:	Wed, 29 Jul 2015 17:27:54 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	James Liao <jamesjj.liao@...iatek.com>
Cc:	Matthias Brugger <matthias.bgg@...il.com>,
	Mike Turquette <mturquette@...libre.com>,
	Heiko Stubner <heiko@...ech.de>, srv_heupstream@...iatek.com,
	Daniel Kurtz <djkurtz@...omium.org>,
	Ricky Liang <jcliang@...omium.org>,
	Rob Herring <robh+dt@...nel.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH v5 06/10] clk: mediatek: mt8173: Fix enabling of critical
 clocks

On 07/29, James Liao wrote:
> From: Sascha Hauer <s.hauer@...gutronix.de>
> 
> On the MT8173 the clocks are provided by different units. To enable
> the critical clocks we must be sure that all parent clocks are already
> registered, otherwise the parents of the critical clocks end up being
> unused and get disabled later.
> 
> On MT8173, for example, it is the CLK_TOP clocks that have CLK_APMIXED
> PLLs as their parents, so we cannot enable the CLK_TOP critical clocks
> until the CLK_APMIXED clocks have all been registered.
> 
> To find a place where all parents are registered we try each time
> after we've registered some clocks if all known providers are present
> now and only then we enable the critical clocks.
> 
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> Signed-off-by: James Liao <jamesjj.liao@...iatek.com>
> ---

Please move up to v4.2-rc2 so that this patch can be dropped. I
already applied this and sent it off to Linus so it's in -rc2.

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