This patchset adds initial support for the clocks controlled by the RPM (Resource Power Manager) processor on Qualcomm platforms. The RPM is a dedicated hardware engine for managing the shared SoC resources in order to keep the lowest power profile. It communicates with other hardware subsystems via shared memory and accepts clock requests, aggregates the requests and turns the clocks on/off or scales them on demand. Until now the RPM clock controller was not supported and a hard- coded fixed-rate clocks were registered in the drivers. Now we try to do a smooth transition by moving the xo oscillator to DT (where it actually belongs) and handle both cases when RPMCC is enabled or disabled (also to avoid breakage on current boards). Changes since v2 (https://lkml.org/lkml/2015/8/3/513) * Addressed various comments from Stephen. Thanks! * Added sleep sets support. * Added a mutex in the RPM driver. * Support both scenarios - RPMCC enabled or disabled. * Make RPMCC more generic in order to support other SMD RPM based platforms. Changes since v1 (https://lkml.org/lkml/2015/7/9/257): * Changed the driver name to clk-smd-rpm, also build it only when it is needed - suggested by Srini and Bjorn. * More detailed binding example. * Minor changes. Georgi Djakov (8): arm64: dts: qcom: 8x16: Add fixed rate on-board oscillator clk: qcom: msm8916: Set the parent of xo to xo_board clk: qcom: msm8916: Ignore sleep_clk_src registration errors arm64: dts: qcom: 8x16: Add fixed rate sleep clock oscillator clk: qcom: Add support for RPM Clocks clk: qcom: Add RPM clock controller driver clk: qcom: msm8916: Use RPMCC if it is enabled clk: qcom: msm8916: Remove hard-coded sleep_clk_src .../devicetree/bindings/clock/qcom,rpmcc.txt | 35 +++ arch/arm64/boot/dts/qcom/msm8916.dtsi | 16 ++ drivers/clk/qcom/Kconfig | 11 + drivers/clk/qcom/Makefile | 2 + drivers/clk/qcom/clk-smd-rpm.c | 260 ++++++++++++++++++++ drivers/clk/qcom/clk-smd-rpm.h | 142 +++++++++++ drivers/clk/qcom/gcc-msm8916.c | 15 +- drivers/clk/qcom/rpmcc.c | 198 +++++++++++++++ include/dt-bindings/clock/qcom,rpmcc-msm8916.h | 44 ++++ 9 files changed, 714 insertions(+), 9 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/qcom,rpmcc.txt create mode 100644 drivers/clk/qcom/clk-smd-rpm.c create mode 100644 drivers/clk/qcom/clk-smd-rpm.h create mode 100644 drivers/clk/qcom/rpmcc.c create mode 100644 include/dt-bindings/clock/qcom,rpmcc-msm8916.h -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
