linux-kernel - Re: [PATCH] clk: iproc: Make clocks visible options

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Date:	Thu, 22 Oct 2015 12:46:46 -0700
From:	Scott Branden <sbranden@...adcom.com>
To:	Jon Mason <jonmason@...adcom.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>
CC:	Florian Fainelli <f.fainelli@...il.com>,
	Hauke Mehrtens <hauke@...ke-m.de>, Ray Jui <rjui@...adcom.com>,
	<linux-clk@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	<bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH] clk: iproc: Make clocks visible options

Hi Jon,

comments inline.

On 15-10-22 12:25 PM, Jon Mason wrote:
> Make the clocks visible options that can be selected by anyone.  This
> avoids the problems of:
>   1) Select is a reverse dependency and is hard for people to understand
>      and can sometimes be a pain to track down
This doesn't make any sense to me - there are many selects in the system 
and this is one of them.
>   2) Build coverage goes down because configs are hidden
>   3) Code bloat
>
> Patch suggested by Stephen Boyd
>
> Signed-off-by: Jon Mason <jonmason@...adcom.com>
> ---
>   arch/arm/mach-bcm/Kconfig |  1 -
>   drivers/clk/bcm/Kconfig   | 35 ++++++++++++++++++++++++++++++++++-
>   drivers/clk/bcm/Makefile  |  7 +++----
>   3 files changed, 37 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
> index 679798b..cacaaec 100644
> --- a/arch/arm/mach-bcm/Kconfig
> +++ b/arch/arm/mach-bcm/Kconfig
> @@ -14,7 +14,6 @@ config ARCH_BCM_IPROC
>   	select HAVE_ARM_SCU if SMP
>   	select HAVE_ARM_TWD if SMP
>   	select ARM_GLOBAL_TIMER
> -	select COMMON_CLK_IPROC
Please leave as is
>   	select CLKSRC_MMIO
>   	select ARCH_REQUIRE_GPIOLIB
>   	select ARM_AMBA
> diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
> index 46ee475..0352ccf 100644
> --- a/drivers/clk/bcm/Kconfig
> +++ b/drivers/clk/bcm/Kconfig
> @@ -9,8 +9,41 @@ config CLK_BCM_KONA
>   	  in the BCM281xx and BCM21664 families.
>
>   config COMMON_CLK_IPROC
> -	bool
> +	bool "Broadcom iProc clock support"
Please leave as is
> +	depends on ARCH_BCM_IPROC
>   	depends on COMMON_CLK
> +	default ARCH_BCM_IPROC
>   	help
>   	  Enable common clock framework support for Broadcom SoCs
>   	  based on the iProc architecture
> +
> +if COMMON_CLK_IPROC
> +
> +comment "Broadcom iProc clocks"
> +
> +config CLK_BCM_CYGNUS
not needed
> +	bool "Broadcom Cygnus clock support"
> +	depends on COMMON_CLK_IPROC
> +	depends on ARCH_BCM_CYGNUS
> +	default ARCH_BCM_CYGNUS
> +	help
> +	  Enable common clock framework support for the Broadcom Cygnus SoC
> +
> +config CLK_BCM_NSP
not needed
> +	bool "Broadcom Northstar/Northstar Plus clock support"
> +	depends on COMMON_CLK_IPROC
> +	depends on ARCH_BCM_5301X || ARCH_BCM_NSP
> +	default ARCH_BCM_5301X || ARCH_BCM_NSP
> +	help
> +	  Enable common clock framework support for the Broadcom Northstar and
> +	  Northstar Plus SoCs
> +
> +config CLK_BCM_NS2
> +	bool "Broadcom Northstar 2 clock support"
> +	depends on ARM64
|| COMPILE_TEST
> +	depends on COMMON_CLK_IPROC
select COMMON_CLK_IPROC
> +	default ARCH_BCM_IPROC
> +	help
> +	  Enable common clock framework support for the Broadcom Northstar 2 SoC
> +
> +endif
> diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile
> index 2d1cbc5..05d5830 100644
> --- a/drivers/clk/bcm/Makefile
> +++ b/drivers/clk/bcm/Makefile
> @@ -3,7 +3,6 @@ obj-$(CONFIG_CLK_BCM_KONA)	+= clk-kona-setup.o
>   obj-$(CONFIG_CLK_BCM_KONA)	+= clk-bcm281xx.o
>   obj-$(CONFIG_CLK_BCM_KONA)	+= clk-bcm21664.o
>   obj-$(CONFIG_COMMON_CLK_IPROC)	+= clk-iproc-armpll.o clk-iproc-pll.o clk-iproc-asiu.o
> -obj-$(CONFIG_COMMON_CLK_IPROC)	+= clk-ns2.o
yes, change this one
> -obj-$(CONFIG_ARCH_BCM_CYGNUS)	+= clk-cygnus.o
you can leave this
> -obj-$(CONFIG_ARCH_BCM_NSP)	+= clk-nsp.o
you can leave this
> -obj-$(CONFIG_ARCH_BCM_5301X)	+= clk-nsp.o
and this
> +obj-$(CONFIG_CLK_BCM_CYGNUS)	+= clk-cygnus.o
no
> +obj-$(CONFIG_CLK_BCM_NSP)	+= clk-nsp.o
no
> +obj-$(CONFIG_CLK_BCM_NS2)	+= clk-ns2.o
yes needed
>

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