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

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Message-ID: <20151022201433.GK651@broadcom.com>
Date:	Thu, 22 Oct 2015 16:14:33 -0400
From:	Jon Mason <jonmason@...adcom.com>
To:	Scott Branden <sbranden@...adcom.com>
CC:	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	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

On Thu, Oct 22, 2015 at 12:46:46PM -0700, Scott Branden wrote:
> 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.

This was specifically requested by Stephen Boyd, and the above are
his words verbatum
https://lkml.org/lkml/2015/10/21/956

Thanks,
Jon

> >  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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