Good morning, On Tue, Nov 30, 2021 at 11:00:47AM +0100, Julien Massot wrote: > Most of the SoCs in the R-Car gen3 SoC series such as > H3,M3 and E3 have an 'Arm Realtime Core'. > This Realtime core is an Arm Cortex-R7 clocked at 800MHz. > This series adds initial support to load a firmware and start > this remote processor through the remoteproc subsystem. > > This series depends on > https://patchwork.kernel.org/project/linux-renesas-soc/patch/20211022122101.66998-1-julien.massot@xxxxxxx/ > to be able to set the Cortex-R7 boot address. The above depencency is needed for this patchset to compile properly. Since Geert has already applied it to his renesas-devel tree we can do two things: 1) Make this set go through Geert's tree. 2) Geert publishes an immutable branch I can pull the dependency from. I'm good either way, just let me know what you want to do. Thanks, Mathieu > > One of the way to test this driver is to use the zephyr upstream support > for h3ulcb board 'blinky' demo is my favorite testing firmware. > > To generate a firmware with the zephyr project. > > follow this starting guide > https://docs.zephyrproject.org/2.7.0/getting_started/index.html > > Then compile your zephyr demo > west build -b rcar_h3ulcb_cr7 zephyr/samples/basic/blinky \ > -DCONFIG_KERNEL_ENTRY=\"_vector_table\" \ > --build-dir h3-blinky > > Then you can use h3-blinky/zephyr/zephyr.elf as a testing > firmware. > > Patch 1/2 adds the dt-bindings > > Patch 2/2 is a small driver to cover basic remoteproc > usage: loading firmware from filesystem, starting and stopping the > Cortex-r7 processor. > > Device tree modifications have been dropped in this patchset version. > Reason is that memory range used by the Cortex-R7 depends on > design choice. > One thing we could do in the future is to add CR7 node > in the different Gen3 SoCs dtsi files such as r8a77951.dtsi, r8a77990.dtsi, > r8a77961.dtsi.. > > Julien Massot (2): > dt-bindings: remoteproc: Add Renesas R-Car > remoteproc: Add Renesas rcar driver > > .../remoteproc/renesas,rcar-rproc.yaml | 65 +++++ > drivers/remoteproc/Kconfig | 11 + > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/rcar_rproc.c | 226 ++++++++++++++++++ > 4 files changed, 303 insertions(+) > create mode 100644 Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml > create mode 100644 drivers/remoteproc/rcar_rproc.c > > -- > 2.33.1 > >
