Messages in this thread |  | | From | Sudeep Holla <> | Subject | [PATCH v4 0/8] ARM64: juno: add SCPI mailbox protocol, clock and CPUFreq support | Date | Mon, 8 Jun 2015 11:39:54 +0100 |
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Hi,
This patch series adds support for: 1. SCPI(System Control and Power Interface) mailbox protocol driver. It uses ARM MHU mailbox controller driver on Juno but can work with any mailbox controllers using standard mailbox APIs 2. Add support for clocks provided by SCP firmware through the SCPI interface 3. Using the existing arm_big_little cpufreq driver and the newly added SCPI clock driver, it also adds support for CPU DVFS on ARM64 JUNO development platforms.
The SCPI protocol document is available @[1],[2]
Changes v3->v4: - Updated the SCPI binding based on MarkR's feedback - Updated SCPI clock driver to incorporate Stephen Boyd's review comments + used clk_set_rate_range to limit the clock range - Since no major changes are expected in SCPI DT, updated the Juno DTS to support SCPI and dependent device nodes. The DT patches are based on Liviu's recent Juno[3]
Changes v2->v3: - Minor fix in SCPI driver and added Tixy's reviewed-by tag - Updated scpi clock driver to incorporate all the comments from Stephen - Added Viresh's ack
Changes v1->v2: - Updated the token handling in scpi driver as per Tixy's suggestion along with other review comments - Removed multiple drivers in scpi clock as Lorenzo suggested - Added free_opp_table in scpi-cpufreq as Viresh suggested - Separated the DT binding document - Moved SCPI protocol driver to drivers/firmware
Regards, Sudeep
[1] http://community.arm.com/servlet/JiveServlet/download/8401-45-18326/DUI0922B_scp_message_interface.pdf [2] https://wiki.linaro.org/ARM/Juno?action=AttachFile&do=get&target=DUI0922B_scp_message_interface.pdf [3] http://www.spinics.net/lists/arm-kernel/msg420945.html v1: https://lkml.org/lkml/2015/4/27/232 v2: https://lkml.org/lkml/2015/5/14/470 v3: https://lkml.org/lkml/2015/5/27/220
Sudeep Holla (8): Documentation: add DT binding for ARM System Control and Power Interface(SCPI) protocol firmware: add support for ARM System Control and Power Interface(SCPI) protocol clk: add support for clocks provided by SCP(System Control Processor) clk: scpi: add support for cpufreq virtual device cpufreq: arm_big_little: add SCPI interface driver arm64: dts: add SRAM, MHU mailbox and SCPI support on Juno arm64: dts: add CPU topology on Juno arm64: dts: add clock support for all the cpus
Documentation/devicetree/bindings/arm/arm,scpi.txt | 156 +++++ arch/arm64/boot/dts/arm/juno-base.dtsi | 31 + arch/arm64/boot/dts/arm/juno-clocks.dtsi | 23 + arch/arm64/boot/dts/arm/juno-r1.dts | 32 + arch/arm64/boot/dts/arm/juno.dts | 32 + drivers/clk/Kconfig | 10 + drivers/clk/Makefile | 1 + drivers/clk/clk-scpi.c | 299 +++++++++ drivers/cpufreq/Kconfig.arm | 9 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/scpi-cpufreq.c | 124 ++++ drivers/firmware/Kconfig | 19 + drivers/firmware/Makefile | 1 + drivers/firmware/arm_scpi.c | 709 +++++++++++++++++++++ include/linux/scpi_protocol.h | 62 ++ 15 files changed, 1509 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/arm,scpi.txt create mode 100644 drivers/clk/clk-scpi.c create mode 100644 drivers/cpufreq/scpi-cpufreq.c create mode 100644 drivers/firmware/arm_scpi.c create mode 100644 include/linux/scpi_protocol.h
-- 1.9.1
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