Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753255AbbESJ7w (ORCPT ); Tue, 19 May 2015 05:59:52 -0400 Received: from mail-wg0-f47.google.com ([74.125.82.47]:34276 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750916AbbESJ7p (ORCPT ); Tue, 19 May 2015 05:59:45 -0400 Message-ID: <555B098A.8030202@linaro.org> Date: Tue, 19 May 2015 11:59:38 +0200 From: Daniel Lezcano User-Agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Maxime Coquelin CC: =?UTF-8?B?VXdlIEtsZWluZS1Lw7ZuaWc=?= , =?UTF-8?B?QW5kcmVhcyBGw6RyYmVy?= , Geert Uytterhoeven , Rob Herring , Philipp Zabel , Linus Walleij , Arnd Bergmann , Stefan Agner , Peter Meerwald , Paul Bolle , Peter Hurley , Andy Shevchenko , Chanwoo Choi , Russell King , Joe Perches , Vladimir Zapolskiy , Lee Jones , Daniel Thompson , Jonathan Corbet , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Thomas Gleixner , Greg Kroah-Hartman , Jiri Slaby , Andrew Morton , "David S. Miller" , Mauro Carvalho Chehab , Antti Palosaari , Tejun Heo , Will Deacon , Nikolay Borisov , Rusty Russell , Kees Cook , Michal Marek , "linux-doc@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-gpio@vger.kernel.org" , "linux-serial@vger.kernel.org" , Linux-Arch , "linux-api@vger.kernel.org" , Nicolae Rosia , Kamil Lulko Subject: Re: [PATCH v8 09/16] clockevents/drivers: Add STM32 Timer driver References: <1431158038-3813-1-git-send-email-mcoquelin.stm32@gmail.com> <1431158038-3813-10-git-send-email-mcoquelin.stm32@gmail.com> <5559E4B0.70506@linaro.org> <555AF143.2060807@linaro.org> <555AFD18.2070009@linaro.org> In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4446 Lines: 143 On 05/19/2015 11:44 AM, Maxime Coquelin wrote: > 2015-05-19 11:06 GMT+02:00 Daniel Lezcano : >> On 05/19/2015 10:55 AM, Maxime Coquelin wrote: >>> >>> 2015-05-19 10:16 GMT+02:00 Daniel Lezcano : >>>> >>>> On 05/18/2015 04:03 PM, Maxime Coquelin wrote: >>>>> >>>>> >>>>> 2015-05-18 15:10 GMT+02:00 Daniel Lezcano : >>>>>> >>>>>> >>>>>> On 05/09/2015 09:53 AM, Maxime Coquelin wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>> STM32 MCUs feature 16 and 32 bits general purpose timers with >>>>>>> prescalers. >>>>>>> The drivers detects whether the time is 16 or 32 bits, and applies a >>>>>>> 1024 prescaler value if it is 16 bits. >>>>>>> >>>>>>> Reviewed-by: Linus Walleij >>>>>>> Tested-by: Chanwoo Choi >>>>>>> Signed-off-by: Maxime Coquelin >>>>>>> --- >>>>>>> drivers/clocksource/Kconfig | 8 ++ >>>>>>> drivers/clocksource/Makefile | 1 + >>>>>>> drivers/clocksource/timer-stm32.c | 184 >>>>>>> ++++++++++++++++++++++++++++++++++++++ >>>>>>> 3 files changed, 193 insertions(+) >>>>>>> create mode 100644 drivers/clocksource/timer-stm32.c >>>>>>> >>>>>>> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig >>>>>>> index bf9364c..2443520 100644 >>>>>>> --- a/drivers/clocksource/Kconfig >>>>>>> +++ b/drivers/clocksource/Kconfig >>>>>>> @@ -106,6 +106,14 @@ config CLKSRC_EFM32 >>>>>>> Support to use the timers of EFM32 SoCs as clock source >>>>>>> and >>>>>>> clock >>>>>>> event device. >>>>>>> >>>>>>> +config CLKSRC_STM32 >>>>>>> + bool "Clocksource for STM32 SoCs" if !ARCH_STM32 >>>>>>> + depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST) >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> Are the interactive bool and the 'COMPILE_TEST' necessary ? >>>>>> >>>>> >>>>> The interactive bool is necessary if we want to be able to >>>>> select/deselect it in COMPILE_TEST configuration. >>>>> And personnaly, I think COMPILE_TEST use makes sense. >>>>> >>>>> Note that other timer drivers are doing the same thing today >>>>> (CLKSRC_EFM32, SH_TIMER_CMT, EM_TIMER_STI...). >>>>> >>>>> Do you have a specific concern regarding COMPILE_TEST? >>>> >>>> >>>> >>>> Actually, we try to keep the timer selection non-interactive and let the >>>> platform's Kconfig to select the timer. >>> >>> >>> Ok. >>> >>>> >>>> I like when the code is consistent. The COMPILE_TEST was introduced and >>>> created a precedence. I would like to get rid of the interactive timer >>>> selection but I did not have time to go through this yet. >>> >>> >>> Indeed, consistency is important. >>> On my side, I don't have a strong opinion regarding the COMPILE_TEST >>> thing. >>> IMHO, it is more a subsystem's maintainer choice. >>> >>> So, if as a maintainer you don't use it and prefer not supporting it, >>> I'm fine to provide you a new version without COMPILE_TEST. >>> Doing that, the interactive selection will disappear too. >>> >>> I can provide you a new version this evenning. >> >> >> Ok, great. > > Is the below Kconfig entry fine for you? > > config CLKSRC_STM32 > def_bool y if ARCH_STM32 > select CLKSRC_MMIO config CLKSRC_STM32 bool select CLKSRC_MMIO and in the arch/arm/mach-stm32/Kconfig add select CLKSRC_STM32 > Best regards, > Maxime > > >> >> Thanks >> -- Daniel >> >> >>>> >>>> >>>> >>>> -- >>>> Linaro.org │ Open source software for ARM SoCs >>>> >>>> Follow Linaro: Facebook | >>>> Twitter | >>>> Blog >>>> >> >> >> -- >> Linaro.org │ Open source software for ARM SoCs >> >> Follow Linaro: Facebook | >> Twitter | >> Blog >> -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/