From mboxrd@z Thu Jan 1 00:00:00 1970 From: lee.jones@linaro.org (Lee Jones) Date: Tue, 24 Feb 2015 17:42:59 +0000 Subject: [PATCH v3 0/4] clk: st: New always-on clock domain In-Reply-To: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> References: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> Message-ID: <20150224174259.GD21323@x1> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, 24 Feb 2015, Lee Jones wrote: > v2 => v3: > - Ensure DT actually reflects h/w > - i.e. Nodes should not contain a mishmash of different IP > blocks, but should identify related h/w. In the current > example we use interconnects > - Change naming from clkdomain to clk-always-on > - Place "do not abuse" warning in documentation > > v1 => v2: > - Turned the ST specific driver into a generic one > > Hardware can have a bunch of clocks which must not be turned off. > If drivers a) fail to obtain a reference to any of these or b) give > up a previously obtained reference during suspend, the common clk > framework will attempt to turn them off and the hardware will > subsequently die. The only way to recover from this failure is to > restart. > > To avoid either of these two scenarios from catastrophically > disabling the running system we have implemented a clock domain > where clocks are consumed and references are taken, thus preventing > them from being shut down by the framework. > > *** BLURB HERE *** *grumble*, that's annoying, as I removed this. I guess Git caches the patches before sending them. > Lee Jones (4): > ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 > ARM: sti: stih407-family: Add platform interconnects to always-on clk > domain > clk: Provide an always-on clock domain framework > clk: dt: Introduce always-on clock domain documentation > > .../devicetree/bindings/clock/clk-always-on.txt | 35 ++++++++++++ > arch/arm/boot/dts/stih407-family.dtsi | 15 ++++++ > drivers/clk/Makefile | 1 + > drivers/clk/clk-always-on.c | 62 ++++++++++++++++++++++ > include/dt-bindings/clock/stih407-clks.h | 4 ++ > 5 files changed, 117 insertions(+) > create mode 100644 Documentation/devicetree/bindings/clock/clk-always-on.txt > create mode 100644 drivers/clk/clk-always-on.c > -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org ? Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Subject: Re: [PATCH v3 0/4] clk: st: New always-on clock domain Date: Tue, 24 Feb 2015 17:42:59 +0000 Message-ID: <20150224174259.GD21323@x1> References: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <1424799222-9301-1-git-send-email-lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: kernel-F5mvAk5X5gdBDgjK7y7TUQ@public.gmane.org, mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On Tue, 24 Feb 2015, Lee Jones wrote: > v2 =3D> v3: > - Ensure DT actually reflects h/w > - i.e. Nodes should not contain a mishmash of different IP > blocks, but should identify related h/w. In the current > example we use interconnects > - Change naming from clkdomain to clk-always-on > - Place "do not abuse" warning in documentation >=20 > v1 =3D> v2: > - Turned the ST specific driver into a generic one > =20 > Hardware can have a bunch of clocks which must not be turned off. > If drivers a) fail to obtain a reference to any of these or b) give > up a previously obtained reference during suspend, the common clk > framework will attempt to turn them off and the hardware will > subsequently die. The only way to recover from this failure is to > restart. > =20 > To avoid either of these two scenarios from catastrophically > disabling the running system we have implemented a clock domain > where clocks are consumed and references are taken, thus preventing > them from being shut down by the framework. >=20 > *** BLURB HERE *** *grumble*, that's annoying, as I removed this. I guess Git caches the patches before sending them. > Lee Jones (4): > ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 > ARM: sti: stih407-family: Add platform interconnects to always-on c= lk > domain > clk: Provide an always-on clock domain framework > clk: dt: Introduce always-on clock domain documentation >=20 > .../devicetree/bindings/clock/clk-always-on.txt | 35 ++++++++++++ > arch/arm/boot/dts/stih407-family.dtsi | 15 ++++++ > drivers/clk/Makefile | 1 + > drivers/clk/clk-always-on.c | 62 ++++++++++++= ++++++++++ > include/dt-bindings/clock/stih407-clks.h | 4 ++ > 5 files changed, 117 insertions(+) > create mode 100644 Documentation/devicetree/bindings/clock/clk-alway= s-on.txt > create mode 100644 drivers/clk/clk-always-on.c >=20 --=20 Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org =E2=94=82 Open source software for ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe devicetree" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753650AbbBXRnK (ORCPT ); Tue, 24 Feb 2015 12:43:10 -0500 Received: from mail-wi0-f179.google.com ([209.85.212.179]:52412 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753627AbbBXRnJ (ORCPT ); Tue, 24 Feb 2015 12:43:09 -0500 Date: Tue, 24 Feb 2015 17:42:59 +0000 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: kernel@stlinux.com, mturquette@linaro.org, sboyd@codeaurora.org, devicetree@vger.kernel.org Subject: Re: [PATCH v3 0/4] clk: st: New always-on clock domain Message-ID: <20150224174259.GD21323@x1> References: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 24 Feb 2015, Lee Jones wrote: > v2 => v3: > - Ensure DT actually reflects h/w > - i.e. Nodes should not contain a mishmash of different IP > blocks, but should identify related h/w. In the current > example we use interconnects > - Change naming from clkdomain to clk-always-on > - Place "do not abuse" warning in documentation > > v1 => v2: > - Turned the ST specific driver into a generic one > > Hardware can have a bunch of clocks which must not be turned off. > If drivers a) fail to obtain a reference to any of these or b) give > up a previously obtained reference during suspend, the common clk > framework will attempt to turn them off and the hardware will > subsequently die. The only way to recover from this failure is to > restart. > > To avoid either of these two scenarios from catastrophically > disabling the running system we have implemented a clock domain > where clocks are consumed and references are taken, thus preventing > them from being shut down by the framework. > > *** BLURB HERE *** *grumble*, that's annoying, as I removed this. I guess Git caches the patches before sending them. > Lee Jones (4): > ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 > ARM: sti: stih407-family: Add platform interconnects to always-on clk > domain > clk: Provide an always-on clock domain framework > clk: dt: Introduce always-on clock domain documentation > > .../devicetree/bindings/clock/clk-always-on.txt | 35 ++++++++++++ > arch/arm/boot/dts/stih407-family.dtsi | 15 ++++++ > drivers/clk/Makefile | 1 + > drivers/clk/clk-always-on.c | 62 ++++++++++++++++++++++ > include/dt-bindings/clock/stih407-clks.h | 4 ++ > 5 files changed, 117 insertions(+) > create mode 100644 Documentation/devicetree/bindings/clock/clk-always-on.txt > create mode 100644 drivers/clk/clk-always-on.c > -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog