linux-kernel - Re: [PATCH v6 4/8] ARM: Add .init_platform() callback to machine descriptor

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Date:	Sat, 22 Jun 2013 15:46:41 +0200
From:	Tomasz Figa <tomasz.figa@...il.com>
To:	linux-samsung-soc@...r.kernel.org
Cc:	linux-arm-kernel@...ts.infradead.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Mark Brown <broonie@...nel.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...aro.org>,
	Benoit Cousson <benoit.cousson@...aro.org>,
	devicetree-discuss@...ts.ozlabs.org,
	Jason Cooper <jason@...edaemon.net>,
	linux-kernel@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
	Nicolas Pitre <nico@...xnic.net>,
	Russell King <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v6 4/8] ARM: Add .init_platform() callback to machine descriptor

Hi Kukjin,

On Friday 21 of June 2013 02:35:20 Tomasz Figa wrote:
> Most ARM platforms have parts that should be initialized as early as
> possible, which usually means as soon as memory management (kmalloc,
> ioremap) starts to work,
> 
> However, currently there is no appropriate callback in machine_desc
> struct to use for such initialization and platforms tend to stuff things
> up .init_irq() and .init_time() callbacks.
> 
> Since all the DT-based platforms are going towards generic IRQ and time
> initialization (using irqchip_init and clocksource_of_init) and current
> code assumes that if custom callbacks are not provided in machine_desc
> then generic ones should be used, this problem has become a bit more
> inconvenient.
> 
> This patch tries to solve this issue by introducing new callback called
> .init_platform(), where any custom low level initialization of platform
> can be done safely.
> 
> Signed-off-by: Tomasz Figa <tomasz.figa@...il.com>
> ---
>  arch/arm/include/asm/mach/arch.h | 1 +
>  arch/arm/kernel/irq.c            | 3 +++
>  2 files changed, 4 insertions(+)

Please disregard this patch when applying the series (if that happens).

Best regards,
Tomasz

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