linux-kernel - Re: [RFC PATCH v2 2/2] drivers: mfd: vexpress: add Serial Power Controller (SPC) support

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Date:	Wed, 5 Jun 2013 10:07:03 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Pawel Moll <pawel.moll@....com>,
	Amit Kucheria <amit.kucheria@...aro.org>,
	Jon Medhurst <tixy@...aro.org>,
	Achin Gupta <achin.gupta@....com>,
	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>
Subject: Re: [RFC PATCH v2 2/2] drivers: mfd: vexpress: add Serial Power
 Controller (SPC) support

On Wed, 5 Jun 2013, Lorenzo Pieralisi wrote:

> The TC2 versatile express core tile integrates a logic block that provides the
> interface between the dual cluster test-chip and the M3 microcontroller that
> carries out power management. The logic block, called Serial Power Controller
> (SPC), contains several memory mapped registers to control among other things
> low-power states, operating points and reset control.
> 
> This patch provides a driver that enables run-time control of features
> implemented by the SPC control logic.
> 
> The driver also provides a bridge interface through the vexpress config
> infrastructure. Operations allowing to read/write operating points are
> made to go via the same interface as configuration transactions so that
> all requests to M3 are serialized.
> 
> Device tree bindings documentation for the SPC component is provided with
> the patchset.
> 

[...]

> +/*
> + * Versatile Express Serial Power Controller (SPC) support
> + *
> + * Copyright (C) 2013 ARM Ltd.
> + *
> + * Author(s): Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>
> + *            Achin Gupta           <achin.gupta@....com>
> + *            Lorenzo Pieralisi     <lorenzo.pieralisi@....com>

I imagine "author(s)" can be written as "authors" without a doubt.  :-)

> +EXPORT_SYMBOL_GPL(vexpress_spc_write_resume_reg);
> +EXPORT_SYMBOL_GPL(vexpress_spc_set_global_wakeup_intr);
> +EXPORT_SYMBOL_GPL(vexpress_spc_set_cpu_wakeup_irq);
> +EXPORT_SYMBOL_GPL(vexpress_spc_powerdown_enable);

I don't think anything that could possibly be made into modules should 
ever have a need for those particular calls.  So I'd suggest not 
exporting them.

Other than that, you may add...

Reviewed-by: Nicolas Pitre <nico@...aro.org>


Nicolas
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