linux-kernel - Re: [PATCH v13 2/3] power-domain: rockchip: add power domain driver

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Date:	Mon, 20 Apr 2015 11:26:44 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Caesar Wang <wxt@...k-chips.com>
Cc:	heiko@...ech.de, khilman@...aro.org,
	linux-arm-kernel@...ts.infradead.org, tomasz.figa@...il.com,
	mark.rutland@....com, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, dianders@...omium.org,
	ulf.hansson@...aro.org, dmitry.torokhov@...il.com,
	broonie@...nel.org, grant.likely@...aro.org,
	"jinkun.hong" <jinkun.hong@...k-chips.com>
Subject: Re: [PATCH v13 2/3] power-domain: rockchip: add power domain driver

On Sun, 2015-04-19 at 18:44 +0800, Caesar Wang wrote:
> --- a/arch/arm/mach-rockchip/Makefile
> +++ b/arch/arm/mach-rockchip/Makefile

+obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o

PM_GENERIC_DOMAINS is a bool symbol, so pm_domains.o can never be part
of a module. Is that correct?

> --- /dev/null
> +++ b/arch/arm/mach-rockchip/pm_domains.c

> +#include <linux/module.h>

This include could probably be dropped.

> +static const struct of_device_id rockchip_pm_domain_dt_match[] = {
> +	{
> +		.compatible = "rockchip,rk3288-power-controller",
> +		.data = (void *)&rk3288_pmu,
> +	},
> +	{ /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, rockchip_pm_domain_dt_match);

The MODULE_DEVICE_TABLE() macro will be preprocessed away for built-in
code, according to include/linux/module.h.

> +static struct platform_driver rockchip_pm_domain_driver = {
> +	.probe = rockchip_pm_domain_probe,
> +	.driver = {
> +		.name   = "rockchip-pm-domain",
> +		.owner  = THIS_MODULE,

According to include/linux/export.h THIS_MODULE is equivalent to NULL
for built-in code. So I think this line is not needed.

> +		.of_match_table = rockchip_pm_domain_dt_match,
> +		/*
> +		 * We can't forcibly eject devices form power domain,
> +		 * so we can't really remove power domains once they
> +		 * were added.
> +		 */
> +		.suppress_bind_attrs = true,
> +	},
> +};

Thanks,


Paul Bolle

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