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Message-Id: <1403654783-7176-1-git-send-email-sboyd@codeaurora.org> Date: Tue, 24 Jun 2014 17:06:11 -0700 From: Stephen Boyd <sboyd@...eaurora.org> To: linux-arm-msm@...r.kernel.org Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Mike Turquette <mturquette@...aro.org> Subject: [RFC/PATCH 00/12] Krait clocks + Krait CPUfreq These patches provide cpufreq scaling on devices with Krait CPUs. For now I've only added support for 8960 and 8974. Adding more chips should be fairly easy. There are still some big TODOs but I'm posting these patches now to get any early feedback possible. The first patch has been posted before. It's included here for completeness. The second patch changes the way rates are changed in the generic framework so that we can safely switch rates of clocks while they're being used to clock the CPU. The third patch is temporary until I can properly use the CCF code for generic muxes and dividers. The fourth, fifth and sixth patches are mostly ready to go, they add HFPLL support. After that, the seventh patch adds support for the Krait clock ops; basically muxes and dividers that are controlled by cp15 registers. The eighth patch adds a driver to control the muxes in KPSSv1 that provide the aux clock source for the Krait clocks. The ninth patch ties all the Krait clocks together into a clock provider. The tenth and eleventh patches are the cpufreq layer that look for a qcom,krait cpu and then register a cpufreq driver that switches the rate of the CPU clocks between whatever OPP tables say are available. The final patch ties it all together by adding all the DTS necessary to get this stuff to probe. I plan to submit the cpufreq patches directly to the cpufreq maintainers and the DTS changes through arm-soc, but I've included everything here to make it easier to pick things up for testing, etc. TODO: * Get rid of clk-generic.c and use the CCF generic code * Make cpufreq-krait generic for any systems with one clock per CPU * Populate OPPs by reading the qfprom instead of relying on DT * Add Krait regulator voltage scaling (not strictly necessary) * Document lots of DT bindings Stephen Boyd (12): ARM: Add Krait L2 register accessor functions clk: Add safe switch hook clk: qcom: Add support for muxes, dividers, and mux dividers clk: qcom: Add support for High-Frequency PLLs (HFPLLs) clk: qcom: Add HFPLL driver clk: qcom: Add MSM8960's HFPLLs clk: qcom: Add support for Krait clocks clk: qcom: Add KPSS ACC/GCC driver clk: qcom: Add Krait clock controller driver cpufreq: Add a cpufreq-krait based on cpufreq-cpu0 cpufreq: Add module to register cpufreq-krait device ARM: dts: qcom: Add necessary DT data for Krait cpufreq arch/arm/boot/dts/qcom-msm8960.dtsi | 49 ++++ arch/arm/boot/dts/qcom-msm8974.dtsi | 106 +++++++- arch/arm/common/Kconfig | 3 + arch/arm/common/Makefile | 1 + arch/arm/common/krait-l2-accessors.c | 58 +++++ arch/arm/include/asm/krait-l2-accessors.h | 20 ++ drivers/clk/clk.c | 53 +++- drivers/clk/qcom/Kconfig | 25 ++ drivers/clk/qcom/Makefile | 6 + drivers/clk/qcom/clk-generic.c | 405 ++++++++++++++++++++++++++++++ drivers/clk/qcom/clk-hfpll.c | 260 +++++++++++++++++++ drivers/clk/qcom/clk-hfpll.h | 54 ++++ drivers/clk/qcom/clk-krait.c | 121 +++++++++ drivers/clk/qcom/clk-krait.h | 22 ++ drivers/clk/qcom/gcc-msm8960.c | 82 ++++++ drivers/clk/qcom/hfpll.c | 110 ++++++++ drivers/clk/qcom/kpss-xcc.c | 115 +++++++++ drivers/clk/qcom/krait-cc.c | 366 +++++++++++++++++++++++++++ drivers/cpufreq/Kconfig | 13 + drivers/cpufreq/Kconfig.arm | 8 + drivers/cpufreq/Makefile | 2 + drivers/cpufreq/cpufreq-krait.c | 190 ++++++++++++++ drivers/cpufreq/qcom-cpufreq.c | 48 ++++ include/linux/clk-private.h | 2 + include/linux/clk-provider.h | 1 + include/linux/clk/msm-clk-generic.h | 208 +++++++++++++++ 26 files changed, 2317 insertions(+), 11 deletions(-) create mode 100644 arch/arm/common/krait-l2-accessors.c create mode 100644 arch/arm/include/asm/krait-l2-accessors.h create mode 100644 drivers/clk/qcom/clk-generic.c create mode 100644 drivers/clk/qcom/clk-hfpll.c create mode 100644 drivers/clk/qcom/clk-hfpll.h create mode 100644 drivers/clk/qcom/clk-krait.c create mode 100644 drivers/clk/qcom/clk-krait.h create mode 100644 drivers/clk/qcom/hfpll.c create mode 100644 drivers/clk/qcom/kpss-xcc.c create mode 100644 drivers/clk/qcom/krait-cc.c create mode 100644 drivers/cpufreq/cpufreq-krait.c create mode 100644 drivers/cpufreq/qcom-cpufreq.c create mode 100644 include/linux/clk/msm-clk-generic.h -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation -- 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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