ARM: rockchip: add smp functionality

A patchset in state Mainline for linux-kernel

From: Heiko Stuebner <heiko@...> Date: Tue, 25 Feb 2014 10:44:15 +0100

This series enables the use of the additional cores on Rockchip Cortex-A9 SoCs. To achieve this, add the scu, the needed sram and power-management-unit. Tested on both a BQ Curie2 (rk3066a / dual core) and on a Radxa Rock (rk3188 / quad core). As this version again involves bigger changes to the way reserved sram- regions are handled, I've dropped the ACKs I had for binding and driver changes again and therefore would be very happy if I could get new ones if applicable (dt-maintainers and Philipp Zabel for sram.c). changes since v7: - move reserved sram regions to be described through subnodes, similar to the general memory-reserve bindings, as suggested by Grant Likely. changes since v6: - address comments from Mark Rutland - using of_property_read_u32_index instead of parsing the list manually - include v4 of "of: add functions to count number of elements in a property" to not have to count property-elements manually anymore changes since v5: - Grant Likely liked it better to "specify reserved regions of the memory instead of the valid ranges", so go back to the mmio-sram-reserved property originally suggested by Rob Herring changes since v4: - rebase on top of the recent rk3188 board support - implement suggestion from Matt Sealey in moving the sram-limit from marking reserved regions to marking available regions - hopefully I got the usage right - remove __CPUINIT as suggested by Fabio Estevam changes since v3: - address comments from Rob Herring: - split the gathering of the reserve-data into a separate loop - spelling and style fixes - first patch only included for reference, already part of the char-misc git tree changes since v2: - rework the sram allocation following the suggestion from Philipp Zabel changes since v1: - add reserved block feature for mmio-sram, to not use two logical sram nodes - the sram content is kept intact while the device is running, so copying the trampoline is only needed once Heiko Stuebner (6): dt-bindings: sram: describe option to reserve parts of the memory misc: sram: implement reserved sram areas ARM: rockchip: add snoop-control-unit ARM: rockchip: add sram dt nodes and documentation ARM: rockchip: add power-management-unit ARM: rockchip: add smp bringup code .../devicetree/bindings/arm/rockchip/pmu.txt | 16 ++ .../devicetree/bindings/arm/rockchip/smp-sram.txt | 30 ++++ Documentation/devicetree/bindings/misc/sram.txt | 33 ++++ arch/arm/boot/dts/rk3066a.dtsi | 13 ++ arch/arm/boot/dts/rk3188.dtsi | 13 ++ arch/arm/boot/dts/rk3xxx.dtsi | 10 ++ arch/arm/mach-rockchip/Kconfig | 1 + arch/arm/mach-rockchip/Makefile | 1 + arch/arm/mach-rockchip/core.h | 22 +++ arch/arm/mach-rockchip/headsmp.S | 30 ++++ arch/arm/mach-rockchip/platsmp.c | 184 +++++++++++++++++++++ arch/arm/mach-rockchip/rockchip.c | 2 + drivers/misc/sram.c | 125 +++++++++++++- 13 files changed, 473 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/rockchip/pmu.txt create mode 100644 Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt create mode 100644 arch/arm/mach-rockchip/core.h create mode 100644 arch/arm/mach-rockchip/headsmp.S create mode 100644 arch/arm/mach-rockchip/platsmp.c --

Patches in this set


  • 6 individual patches
  • 475 lines added
  • 7 lines removed

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