linux-kernel - Re: [PATCH] clocksource/drivers/sprd: Remove the dependency between sprd timer and SPRD arch

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Date:   Tue, 18 May 2021 11:04:40 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Nianfu Bai <bnf20061983@...il.com>
Cc:     daniel.lezcano@...aro.org, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, nianfu.bai@...soc.com,
        ruifeng.zhang1@...soc.com
Subject: Re: [PATCH] clocksource/drivers/sprd: Remove the dependency between
 sprd timer and SPRD arch

On Tue, May 11, 2021 at 03:08:45PM +0800, Nianfu Bai wrote:
> From: Nianfu Bai <nianfu.bai@...soc.com>
> 
> Tick broadcast installed by insmod cannot switch to oneshot mode correctly
> caused by linux timer framework, need to build in kernel image. SPRD_TIMER
> has been selected by SPRD arch, we have to enable SPRD arch when we build
> sprd timer in kernel image, this action conflicts with general kernel image,
> so we need to remove the dependency between sprd timer and SPRD arch.

This wording is a bit rough to parse.

All you really want to do is take away the fact that ARCH_SPRD is
required here to turn this off, right?

> 
> Signed-off-by: Nianfu Bai <nianfu.bai@...soc.com>
> Signed-off-by: Ruifeng Zhang <ruifeng.zhang1@...soc.com>
> ---
>  drivers/clocksource/Kconfig | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 39aa21d..04b333c 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -447,10 +447,8 @@ config MTK_TIMER
>  	  Support for Mediatek timer driver.
>  
>  config SPRD_TIMER
> -	bool "Spreadtrum timer driver" if EXPERT
> +	bool "Spreadtrum timer driver" if COMPILE_TEST

No need for "if COMPILE_TEST" on this line.

>  	depends on HAS_IOMEM
> -	depends on (ARCH_SPRD || COMPILE_TEST)
> -	default ARCH_SPRD

Just drop the ARCH_SPRD portion here and maybe make it depend on ARM64
instead like:
	depends on (ARM64 || COMPILE_TEST)

and drop the EXPERT check above?

What is the goal of what you want to do here?  Just allow this to be
enabled on what type of systems?

thanks,

greg k-h