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Date: Wed, 8 May 2013 14:06:10 -0500 From: Nishanth Menon <nm@...com> To: Benoit Cousson <b-cousson@...com>, Tony Lindgren <tony@...mide.com>, Kevin Hilman <khilman@...prootsystems.com>, Mike Turquette <mturquette@...aro.org> CC: <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, Nishanth Menon <nm@...com> Subject: [PATCH V5 0/6] ARM: OMAP3+: support cpufreq-cpu0 for device tree boot The following version 5 of the series arose from trying to use BeagleBoard-XM (OMAP3 variant) for doing CPU DVFS using cpufreq-cpu0. This series enables the generic cpufreq-cpu0 driver to be used in device tree enabled boot while maintaining support of the legacy omap-cpufreq driver when used in non device tree enabled boot. However, in order to enable complete SoC entitlement for OMAP platforms, with this series, key features are still pending on device tree adaptation for OMAP: A) clock framework data transition to DT - this series provides an driver to allow device tree definition of clock node. B) On processors that use voltage controller, voltage processor (VC/VP hardware loop using I2C_SR path) - we have started work on transitioning them to regulator framework driven by DT. C) Adaptive Body Bias[2] and SmartReflex AVS conversion to DT. Note: Common Clock Framework(CCF) could also control regulators[3] and AVS to ensure proper sequencing required for full DVFS sequencing. Once these conversions are complete, there might be minimal cleanup work to switch to the new data structure changes. Key benefit of the series is to allow all relevant TI platforms now to use a single cpufreq driver and equivalent frameworks in addition be part of the transition to device tree. NOTE on this series: 1. omap-cpufreq will be used only in non device tree boot scenario. we should delete this driver once the 100% DT conversion is complete. 2. Generic cpufreq-cpu0 will be used only in device tree boot scenario boot systems 3. clock data movement as approached by Tero in [4] is not the objective of this series 4. meant for post 3.10-rc1 tag Key changes in version 5 since version 4: - rebase with master for 3.10-rc1 intermediate - review comments incorporated version 4 of the series: http://marc.info/?l=linux-arm-kernel&m=136580742724210&w=2 available at: https://github.com/nmenon/linux-2.6-playground/commits/push/cpufreq-cpu0-omap-all-v4 version 3 of the series: http://marc.info/?l=linux-pm&m=136450759315742&w=2 available at: https://github.com/nmenon/linux-2.6-playground/commits/push/cpufreq-cpu0-omap-all-v3 version 2 of the series: http://marc.info/?t=136371570200003&r=1&w=2 available at: https://github.com/nmenon/linux-2.6-playground/commits/push/cpufreq-cpu0-omap-all-v2 version 1 of the series: http://marc.info/?t=136329485400005&r=1&w=2 available at: https://github.com/nmenon/linux-2.6-playground/commits/push/cpufreq-cpu0-omap-all-v1 [1] Original discussion thread which triggered this series: http://marc.info/?l=linux-pm&m=136304313700602&w=2 https://patchwork.kernel.org/patch/2251841/ https://patchwork.kernel.org/patch/2251851/ [2] ABB series: http://marc.info/?l=linux-omap&m=136751559523901&w=2 (ABB DTS merge pending) [3] CCF DVFS patches: https://patchwork.kernel.org/patch/2195431/ https://patchwork.kernel.org/patch/2195421/ https://patchwork.kernel.org/patch/2195451/ https://patchwork.kernel.org/patch/2195441/ https://patchwork.kernel.org/patch/2195461/ [4] http://marc.info/?t=136388745000001&r=1&w=2 Version 5 is now based on master since all requisite for-next branches have been merged. master 5af43c2 Merge branch 'akpm' (incoming from Andrew) Version 4 is also available at: https://github.com/nmenon/linux-2.6-playground/commits/push/cpufreq-cpu0-omap-all-v5 git link: git://github.com/nmenon/linux-2.6-playground.git branch: cpufreq-cpu0-omap-all-v5 Test coverage: test script: http://pastebin.com/GsavxiDe (note - to allow testing, I followed the suggestion in https://lkml.org/lkml/2013/5/8/19 ) Platforms verified: beaglebone(rev A6a) - AM33xx compatible - http://pastebin.com/zANKsYBp beagleboard (rev C1D) - OMAP3430 compatible - DT enabled boot: http://pastebin.com/q4qZYVaK - No DT enabled boot: http://pastebin.com/c1CbQmV5 omap3-beagle-xm -OMAP3630 compatible - http://pastebin.com/ibUABcA0 SDP4430 -(OMAP4430 ES2.2) - http://pastebin.com/wYwUc3fU Pandaboard-ES -(OMAP4460 ES1.1) - http://pastebin.com/FB2RiFp2 Nishanth Menon (6): clk: OMAP: introduce device tree binding to kernel clock data [Clk driver probably belongs to mike's tree?] ARM: dts: OMAP3: add clock nodes for CPU ARM: dts: OMAP4: add clock nodes for CPU ARM: dts: AM33XX: add clock nodes for CPU [The above probably belong to Benoit's tree] ARM: OMAP2+: AM33XX: add lateinit hook for calling pm late init ARM: OMAP3+: use cpu0-cpufreq driver in device tree supported boot [The above probably belong to Kevin/Tony's tree] .../devicetree/bindings/clock/omap-clock.txt | 40 +++++++++ arch/arm/boot/dts/am33xx.dtsi | 7 ++ arch/arm/boot/dts/omap3.dtsi | 7 ++ arch/arm/boot/dts/omap4.dtsi | 7 ++ arch/arm/mach-omap2/board-generic.c | 1 + arch/arm/mach-omap2/cclock33xx_data.c | 1 - arch/arm/mach-omap2/common.h | 1 + arch/arm/mach-omap2/io.c | 6 ++ arch/arm/mach-omap2/pm.c | 11 ++- drivers/clk/Makefile | 1 + drivers/clk/omap/Makefile | 1 + drivers/clk/omap/clk.c | 91 ++++++++++++++++++++ 12 files changed, 170 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/omap-clock.txt create mode 100644 drivers/clk/omap/Makefile create mode 100644 drivers/clk/omap/clk.c Regards, Nishanth Menon -- 1.7.9.5 -- 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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