[rtc-linux] Re: [PATCH v2 1/4] NTP: rtc: Add CONFIG_RTC_SYSTOHC_DEVICE for NTP synchronization

[Paul Bolle <pebolle@tiscali.nl>]

On Fri, 2015-05-29 at 22:46 +0800, Xunlei Pang wrote:
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig

>  config RTC_HCTOSYS_DEVICE
>  	string "RTC used to set the system time"
> -	depends on RTC_HCTOSYS = y || RTC_SYSTOHC = y
> +	depends on RTC_HCTOSYS = y

RTC_HCTOSYS and RTC_SYSTOHC are bool symbols. The "= y" test is not
needed and the common idiom is to use only
	depends on RTC_HCTOSYS

Since you're touching this you might as well switch to that idiom.

>  	default "rtc0"
>  	help
>  	  The RTC device that will be used to (re)initialize the system
> 	  minutes if userspace reports synchronized NTP status.

> +config RTC_SYSTOHC_DEVICE
> +	string "RTC used to synchronize NTP adjustment"
> +	depends on RTC_SYSTOHC = y

Likewise.

> +	default "rtc0"
> +	help
> +	  The RTC device used for NTP synchronization. The main difference
> +	  between RTC_HCTOSYS_DEVICE and RTC_SYSTOHC_DEVICE is that this
> +	  one can sleep when setting time, because it runs in the workqueue
> +	  context.


Paul Bolle

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