linux-kernel - RE: [PATCH v2 2/2] driver: clocksource: Add nxp system counter timer driver support

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Message-ID: <VI1PR0402MB3519AF0CEF41F24867B10986878A0@VI1PR0402MB3519.eurprd04.prod.outlook.com>
Date:   Tue, 8 Jan 2019 09:33:18 +0000
From:   Jacky Bai <ping.bai@....com>
To:     Randy Dunlap <rdunlap@...radead.org>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        Aisheng Dong <aisheng.dong@....com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH v2 2/2] driver: clocksource: Add nxp system counter timer
 driver support

> Subject: Re: [PATCH v2 2/2] driver: clocksource: Add nxp system counter timer
> driver support
> 
> Hi,
> 
> On 12/11/18 9:28 PM, Jacky Bai wrote:
> > diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> > index c57b156..7e5f2de 100644
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> > @@ -579,6 +579,14 @@ config CLKSRC_IMX_TPM
> >  	  Enable this option to use IMX Timer/PWM Module (TPM) timer as
> >  	  clocksource.
> >
> > +config CLKSRC_IMX_SYS_CTR
> > +	bool "Clocksource using i.MX system counter" if COMPILE_TEST
> 
> Looks like a "make *config" user only gets this prompt if COMPILE_TEST is set.
> 
> If COMPILE_TEST is not set, how does this driver become enabled/set?
> 
> 

Sorry for reply to you so later. this driver need to be enable explicitly when IMX soc is built.

BR
> > +	depends on (ARM || ARM64) && CLKDEV_LOOKUP
> > +	select CLKSRC_MMIO
> > +	help
> > +	  Enable this option to use IMX system counter timer as
> > +	  clocksource.
> > +
> >  config CLKSRC_ST_LPC
> >  	bool "Low power clocksource found in the LPC" if COMPILE_TEST
> >  	select TIMER_OF if OF
> 
> thanks,
> --
> ~Randy