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Date: Tue, 17 Dec 2013 14:28:13 +0900 From: Magnus Damm <magnus.damm@...il.com> To: Olof Johansson <olof@...om.net> Cc: linux-kernel <linux-kernel@...r.kernel.org>, Kevin Hilman <khilman@...aro.org>, Arnd Bergmann <arnd@...db.de>, SH-Linux <linux-sh@...r.kernel.org>, Daniel Lezcano <daniel.lezcano@...aro.org>, "Simon Horman [Horms]" <horms@...ge.net.au>, John Stultz <john.stultz@...aro.org>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH v4 01/03] clocksource: Add Kconfig entries for CMT, MTU2, TMU and STI Hi Olof, On Mon, Dec 16, 2013 at 2:39 PM, Olof Johansson <olof@...om.net> wrote: > On Fri, Dec 13, 2013 at 07:12:58PM +0900, Magnus Damm wrote: >> Hi Olof, >> >> On Thu, Dec 12, 2013 at 10:05 AM, Olof Johansson <olof@...om.net> wrote: >> > Hi, >> > >> > A couple of small comments below. >> >> Thanks for your feedback! >> >> > On Thu, Dec 12, 2013 at 08:56:26AM +0900, Magnus Damm wrote: >> >> From: Magnus Damm <damm@...nsource.se> >> >> >> >> Add Kconfig entries for CMT, MTU2, TMU and STI to >> >> drivers/clocksource/Kconfig. This will allow us to >> >> get rid of duplicated entires in architecture code >> >> such as arch/sh and arch/arm/mach-shmobile. >> >> >> >> Signed-off-by: Magnus Damm <damm@...nsource.se> >> >> --- >> >> >> >> drivers/clocksource/Kconfig | 44 +++++++++++++++++++++++++++++++++++++++++++ >> >> 1 file changed, 44 insertions(+) >> >> >> >> --- 0001/drivers/clocksource/Kconfig >> >> +++ work/drivers/clocksource/Kconfig 2013-12-12 08:41:55.000000000 +0900 >> >> @@ -134,3 +134,47 @@ config VF_PIT_TIMER >> >> bool >> >> help >> >> Support for Period Interrupt Timer on Freescale Vybrid Family SoCs. >> >> + >> >> +config SYS_SUPPORTS_CMT >> >> + bool >> >> + >> >> +config SYS_SUPPORTS_TMU >> >> + bool >> >> + >> >> +config SYS_SUPPORTS_MTU2 >> >> + bool >> >> + >> >> +config SYS_SUPPORTS_STI >> >> + bool >> > >> > Maybe a prefix to avoid namespace collissions here? >> >> Sure, that is fine with me. I based the ones above on already existing >> ones used by SH but I don't mind reworking those. >> >> How about SYS_SUPPORTS_CLKSRC_xxx? > > Oh, I was hoping for something shmobile-specific. Other platforms might have > some other clock source that they name STI or MTU, for example. Thanks for the clarification. So how about the following? SYS_SUPPORTS_SH_CMT SYS_SUPPORTS_SH_MTU2 SYS_SUPPORTS_SH_TMU SYS_SUPPORTS_EM_STI The above match the style of the existing CONFIG_ SH/EM _TIMER_ CMT/MTU2/TMU/STI. Regarding the SH vs EM prefix, the SH ones are present on arch/sh while EM_STI is only present on Emma Mobile SoCs. >> >> +config SH_TIMER_CMT >> >> + bool "Renesas CMT timer driver" if COMPILE_TEST >> >> + default SYS_SUPPORTS_CMT >> > >> > It might be useful to have an explicit depends on ARCH_SH || ARCH_SHMOBILE >> > || COMPILE_TEST on these, just to make it easier for someone reading >> > the code later on. >> >> I have any strong feelings one way or the other about that myself, but >> I got the impression that John Stultz preferred to not allow manual >> selection at all, and my compromise here is to allow it only when >> COMPILE_TEST is selected. >> >> Would you be ok to keep it as-is for now? If needed then we can add an >> incremental patch later to enable more flexible selection. > > Yeah, if there's no manual selection at all we might be fine. Ok, I will keep it as-is then. Thanks, / magnus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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