linux-kernel - Re: [PATCH 3/3] soc: fsl: add RCPM driver

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Message-ID: <86101ce0f4201d05510e57d74cafe8c665b8e5d4.camel@buserror.net>
Date:   Fri, 07 Sep 2018 15:25:04 -0500
From:   Scott Wood <oss@...error.net>
To:     Ran Wang <ran.wang_1@....com>, Leo Li <leoyang.li@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     devicetree@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/3] soc: fsl: add RCPM driver

On Fri, 2018-08-31 at 11:52 +0800, Ran Wang wrote:
> The NXP's QorIQ Processors based on ARM Core have RCPM module (Run
> Control and Power Management), which performs all device-level
> tasks associated with power management such as wakeup source control.
> 
> This driver depends on FSL platform PM driver framework which help to
> isolate user and PM service provider (such as RCPM driver).
> 
> Signed-off-by: Chenhui Zhao <chenhui.zhao@....com>
> Signed-off-by: Ying Zhang <ying.zhang22455@....com>
> Signed-off-by: Ran Wang <ran.wang_1@....com>
> ---
>  drivers/soc/fsl/Kconfig   |    6 ++
>  drivers/soc/fsl/Makefile  |    1 +
>  drivers/soc/fsl/ls-rcpm.c |  153
> +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 160 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/soc/fsl/ls-rcpm.c

Is there a reason why this is LS-specific, or could it be used with PPC RCPM
blocks?

> diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig
> index 6517412..882330d 100644
> --- a/drivers/soc/fsl/Kconfig
> +++ b/drivers/soc/fsl/Kconfig
> @@ -30,3 +30,9 @@ config FSL_PLAT_PM
>  	  have to know the implement details of wakeup function it require.
>  	  Besides, it is also easy for service side to upgrade its logic
> when
>  	  design changed and remain user side unchanged.
> +
> +config LS_RCPM
> +	bool "Freescale RCPM support"
> +	depends on (FSL_PLAT_PM)

Why is this parenthesized?

-Scott