Message-ID: <983987af96464a60bd3ab65640c72703@BJMBX01.spreadtrum.com>
Date:   Wed, 19 May 2021 05:53:10 +0000
From:   柏年福 (Nianfu Bai) <nianfu.bai@...soc.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Nianfu Bai <bnf20061983@...il.com>
CC:     "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        张瑞峰 (Ruifeng Zhang/10040) 
        <Ruifeng.Zhang1@...soc.com>,
        张春艳 (Chunyan Zhang) 
        <Chunyan.Zhang@...soc.com>,
        翟京 (Orson Zhai) <Orson.Zhai@...soc.com>,
        刘高 (Gao Liu) <Gao.Liu@...soc.com>
Subject: 答复: [PATCH] clocksource/drivers/sprd: Remove the dependency between sprd timer and SPRD arch

> 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?
>Yes, please refer to the following issues:
https://partnerissuetracker.corp.google.com/issues/176065415
https://android-review.googlesource.com/c/kernel/common/+/1549618


>
> 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)

>This module has nothing to do with the architecture, therefore it should not depend on ARM64.

and drop the EXPERT check above?

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

-----邮件原件-----
发件人: Greg KH <gregkh@...uxfoundation.org>
发送时间: 2021年5月18日 17:05
收件人: Nianfu Bai <bnf20061983@...il.com>
抄送: daniel.lezcano@...aro.org; tglx@...utronix.de; linux-kernel@...r.kernel.org; 柏年福 (Nianfu Bai) <nianfu.bai@...soc.com>; 张瑞峰 (Ruifeng Zhang/10040) <Ruifeng.Zhang1@...soc.com>
主题: 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
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