From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Schocher Subject: Re: [PATCH] rtc: pcf8563: disable CLKOUT Date: Wed, 14 Oct 2015 06:19:29 +0200 Message-ID: <561DD7D1.5040102@denx.de> References: <1444712938-22865-1-git-send-email-hs@denx.de> <20151013201703.GA3421@piout.net> Reply-To: hs-ynQEQJNshbs@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20151013201703.GA3421-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Alexandre Belloni Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Georg.Soffel-k21M0aUVSxZWk0Htik3J/w@public.gmane.org, rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, Alessandro Zummo , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org Hello Alexandre, Am 13.10.2015 um 22:17 schrieb Alexandre Belloni: > Hi, > > On 13/10/2015 at 07:08:58 +0200, Heiko Schocher wrote : >> Disable the CLKOUT of the RTC after power-up. >> After power-up/reset of the RTC, CLKOUT is enabled by default, >> with CLKOUT enabled the RTC chip has 2-3 times higher power >> consumption. If you do not need CLKOUT, you can disable the >> CLKOUT with setting "disable-clkout" property. >> > > I think you can simply unconditionally disable clkout. My preferred way > of doing what you suggest is probably to register a clock in the CCF. If > the clock is not used, it will be automatically disabled. > It will also provide a generic way of setting the clkout frequency (some > RTC are able to output 32kHZ, 1kHz and 1Hz). Does disabling it ot break some boards? I take a look into CCF, good idea. bye, Heiko -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html