linux-kernel - Re: [PATCH RFC v2 13/16] ARM: tegra: split tegra_pmc

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Message-ID: <521D214C.80809@wwwdotorg.org>
Date:	Tue, 27 Aug 2013 15:59:40 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
CC:	Stephen Warren <swarren@...dia.com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, linux-tegra@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v2 13/16] ARM: tegra: split tegra_pmc_init() in two

On 08/27/2013 03:28 PM, Sebastian Hesselbarth wrote:
> From: Stephen Warren <swarren@...dia.com>
> 
> Tegra's board file currently initializes clocks much earlier than those
> for most other ARM SoCs. The reason is:
> 
> * The PMC HW block is involved in the path of some interrupts (i.e. it
> inverts, or not, the IRQ input pin dedicated to the PMIC).
> 
> * So, that part of the PMC must be initialized early so that the IRQ
> polarity is correct.
> 
> * The PMC initialization is currently monolithic, and the PMC has some
> clock inputs, so the init routine ends up calling of_clk_get_by_name(),
> and hence clocks must be set up early too.
> 
> In order to defer clock initialization to the more typical location,
> split out the portions of tegra_pmc_init() that are truly IRQ-related
> into a separate tegra_pmc_init_irq(), which can be called from the
> machine descriptor's .init_irq() function, and defer the rest until
> the machine descriptor's .init_machine() function. With arch/arm calling
> of_clk_init(NULL) from time_init() this also allows the removal of
> .init_time() hook.
> 
> Signed-off-by: Stephen Warren <swarren@...dia.com>
> ---
> Changelog:
> v1->v2:
> - took Stephen Warren's patch provided to separate Tegra's pmc_init
> - sqashed in .init_time removal and reworded patch text

I think it'd be better to keep the 2 patches separate so the two logical
changes are in different patches. I suppose it isn't a huge deal though.

Either way, on this patch, your S-o-b line is missing above.
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