linux-kernel - Re: [PATCH V8 1/6] power: reset: Add generic SYSCON register mapped reset

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Date:	Tue, 08 Jul 2014 20:54:20 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Feng Kan <fkan@....com>, dbaryshkov@...il.com,
	catalin.marinas@....com, dwmw2@...radead.org, arnd@...db.de,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, patches@....com
Subject: Re: [PATCH V8 1/6] power: reset: Add generic SYSCON register mapped
 reset

On 07/08/2014 07:15 PM, Feng Kan wrote:
> Add a generic SYSCON register mapped reset mechanism.
>
> Signed-off-by: Feng Kan <fkan@....com>
> ---
>   drivers/power/reset/Kconfig         |  6 +++
>   drivers/power/reset/Makefile        |  1 +
>   drivers/power/reset/syscon-reboot.c | 91 +++++++++++++++++++++++++++++++++++++
>   3 files changed, 98 insertions(+)
>   create mode 100644 drivers/power/reset/syscon-reboot.c
>
> diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
> index bdcf517..5877b38 100644
> --- a/drivers/power/reset/Kconfig
> +++ b/drivers/power/reset/Kconfig
> @@ -80,3 +80,9 @@ config POWER_RESET_KEYSTONE
>   	help
>   	  Reboot support for the KEYSTONE SoCs.
>
> +config POWER_RESET_SYSCON
> +	bool "Generic SYSCON regmap reset driver"
> +	depends on ARM || ARM64 || COMPILE_TEST

As written, this driver is really not generic but very arm specific.
I don't think COMPILE_TEST is a good idea either, since arm_pm_restart
is only defined for the arm architecture. Did you try compiling allmodconfig
or allyesconfig for, say, x86_64 with this patch applied ?

I think this might benefit from using [1], which would make it really
generic.

Guenter

[1] http://www.spinics.net/lists/kernel/msg1780939.html

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