This patch series adds bindings document for RPU subsystem found on Xilinx ZynqMP platforms. It also adds device nodes and driver to enable RPU subsytem in split mode and lockstep mode.
Xilinx ZynqMP platform contains Remote Processing Unit(RPU). RPU subsystem contains two arm cortex r5f cores. RPU subsystem can be configured in split mode, locsktep mode and single-cpu mode.
RPU subsystem also contains 4 Tightly Coupled Memory(TCM) banks. In lockstep mode, all 4 banks are combined and total of 256KB memory is made available to r5 core0. In split mode, both cores can access two TCM banks i.e. 128 KB.
RPU can also fetch data and execute instructions from DDR memory along with TCM memory. ---
Changes in v3: - Fix checkpatch script indentation warning - Remove unused variable from xilinx remoteproc driver - use C style comments, i.e /*...*/ - Remove redundant debug information which can be derived using /proc/device-tree - Fix multilined comment format - s/"final fot TCM"/"final for TCM" - Function devm_kzalloc() does not return an code on error, just NULL. Remove redundant error check for this function throughout the driver. - Fix RPU mode configuration and add documentation accordingly - Get rid of the indentations to match function documentation style with rest of the driver - Fix memory leak by only using r5_rproc->priv and not replace it with new instance - Use 'i' for the outer loop and 'j' for the inner one as per convention - Remove redundant error and NULL checks throughout the driver - Use devm_kcalloc() when more than one element is required - Add memory-regions carveouts during driver probe instead of parse_fw call This removes redundant copy of reserved_mem object in r5_core structure. - Fix memory leak by using of_node_put() - Fix indentation of tcm_mem_map function args - Remove redundant init of variables - Initialize tcm bank size variable for lockstep mode - Replace u32 with phys_addr_t for variable stroing memory bank address - Add documentation of TCM behavior in lockstep mode - Use dev_get_drvdata instead of platform driver API - Remove info level messages - Fix checkpatch.pl warnings - Add documentation for the Xilinx r5f platform to understand driver design
Changes in v2: - Remove proprietary copyright footer from cover letter
Ben Levinsky (3): firmware: xilinx: Add ZynqMP firmware ioctl enums for RPU configuration. firmware: xilinx: Add shutdown/wakeup APIs firmware: xilinx: Add RPU configuration APIs
Tanmay Shah (3): dt-bindings: remoteproc: Add Xilinx RPU subsystem bindings arm64: dts: xilinx: zynqmp: Add RPU subsystem device node drivers: remoteproc: Add Xilinx r5 remoteproc driver
.../bindings/remoteproc/xlnx,r5f-rproc.yaml | 139 +++ arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 17 + drivers/firmware/xilinx/zynqmp.c | 96 ++ drivers/remoteproc/Kconfig | 12 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/xlnx_r5_remoteproc.c | 975 ++++++++++++++++++ include/dt-bindings/power/xlnx-zynqmp-power.h | 6 + include/linux/firmware/xlnx-zynqmp.h | 60 ++ 8 files changed, 1306 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/xlnx,r5f-rproc.yaml create mode 100644 drivers/remoteproc/xlnx_r5_remoteproc.c
base-commit: c1fe10d238c0256a77dbc4bf6493b9782b2a218d