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

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Message-ID: <dbe836ff-cd29-a693-4d83-a2fee419b424@infradead.org>
Date:   Wed, 12 Dec 2018 10:48:22 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Jacky Bai <ping.bai@....com>,
        "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

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?


> +	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