Hi, this is the next attepmt to add support for On Chip Memory configuration via On Chip Memory Controller. OCM can be divided into 4 independend blocks and placed to two locations which this driver detects. For everybody on-chip SRAM driver "mmio-sram" is missing parity IRQ handling not sure how to write in generic way and also the memory layout can be changed at run time (not currently supported by this driver) smp-sram trampoline allocation can be used from mmio-sram and size allocated via DT but currently no reason for using it. Creating mmio-sram node with setting at run time based on current setting is possible but it won't look good. One way how to do it is here "ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board" (sha1: 85e618a1be2b2092318178d1d66bdad49cbbeeeb) but creating nodes at run-time or changing compact strings will be just more hacky code. Using device-tree overlays is another option but SMP trampoline code is placed there and it will be used by PM code that's why driver should be there before user-space. Next option is to create driver which just create platform device at run-time. This is doable but I expect sram driver has to be updated. Thanks, Michal Changes in v4: - New patch in this series - New patch in this series - Move only slcr.h and smp.h and keep common.h in platform which is not needed by OCMC driver Based on Arnd request: https://lkml.org/lkml/2014/10/20/268 Not all symbols from slcr.h/smp.h will be used by OCMC driver - no problem to remove them if it is needed - Add record to MAINTAINERS file - slcr.h has moved to soc/include/ folder. Move definition there too. - Use }; instead of } ; in doc - Use memory-controller@... instead of ocmc@... - Create Kconfig entry for OCMC driver - enable GENERIC_ALLOCATOR here - Add entry to MAINTAINERS file - Use memory-controller@... instead of ocmc@... Changes in v3: - Move OCM to drivers/soc - Update year - Extract DTS node to be able to apply it out of driver - Remove generic allocator enabling - Extract SLCR part - Use const in of_device_id - OCM->OCMC - Use ocmc-1.0 compatible string - Extract from OCM driver Changes in v2: - Update pm.c added in 3.17 too - Soren pointed on it - Change compatibility string to be in xilinx format - Fix kernel-doc format Michal Simek (6): ARM: zynq: Extract smp related functions out of common.h ARM: zynq: Extract slcr related functions out of common.h ARM: zynq: Move slcr.h and smp.h to generic location ARM: zynq: Extend SLCR driver to read OCM configuration ARM: zynq: Add OCM controller driver ARM: zynq: DT: Add OCM controller node .../bindings/arm/zynq/xlnx,zynq-ocmc.txt | 17 ++ MAINTAINERS | 2 + arch/arm/boot/dts/zynq-7000.dtsi | 7 + arch/arm/mach-zynq/common.c | 2 + arch/arm/mach-zynq/common.h | 19 -- arch/arm/mach-zynq/platsmp.c | 3 + arch/arm/mach-zynq/slcr.c | 17 ++ drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/zynq/Kconfig | 13 ++ drivers/soc/zynq/Makefile | 1 + drivers/soc/zynq/zynq_ocmc.c | 247 +++++++++++++++++++++ include/soc/zynq/slcr.h | 30 +++ include/soc/zynq/smp.h | 30 +++ 14 files changed, 371 insertions(+), 19 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/zynq/xlnx,zynq-ocmc.txt create mode 100644 drivers/soc/zynq/Kconfig create mode 100644 drivers/soc/zynq/Makefile create mode 100644 drivers/soc/zynq/zynq_ocmc.c create mode 100644 include/soc/zynq/slcr.h create mode 100644 include/soc/zynq/smp.h -- 1.8.2.3
Attachment:
pgp3lttmbn7hy.pgp
Description: PGP signature
