[v1,0/3] Initial Renesas R-Car remoteproc support

Message

Julien Massot Nov. 15, 2021, 1:50 p.m. UTC

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/[e-mail]/
to be able to set the Cortex-R7 boot address.

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 1/3 adds the dt-bindings

Patch 2/3 adds entries into the dts/dtsi files for r8a77951,
my testing platform. This driver has also been tested on E3 and M3,
but lacks proper zephyr support at the moment.

Modifications to r8a77951-ulcb.dts are given as usage example
and may be dropped in future patchset since it use some memory
range that may be reserved for other usage.

Patch 3/3 is a small driver to cover basic remoteproc
usage: loading firmware from filesystem, starting and stopping the
Cortex-r7 processor.

Julien Massot (3):
  dt-bindings: remoteproc: Add Renesas R-Car
  arm64: dts: renesas: r8a77951: Add CR7 realtime processor
  remoteproc: Add Renesas rcar driver

 .../remoteproc/renesas,rcar-rproc.yaml        |  66 +++++
 arch/arm64/boot/dts/renesas/r8a77951-ulcb.dts |  15 ++
 arch/arm64/boot/dts/renesas/r8a77951.dtsi     |   7 +
 drivers/remoteproc/Kconfig                    |  12 +
 drivers/remoteproc/Makefile                   |   1 +
 drivers/remoteproc/rcar_rproc.c               | 226 ++++++++++++++++++
 6 files changed, 327 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml
 create mode 100644 drivers/remoteproc/rcar_rproc.c

Comments

Mathieu Poirier Nov. 15, 2021, 6:10 p.m. UTC | #1

Good morning,

I have received your patchset but the backlog accumulated over the last little
while as become impressive.  As such I may not be able to provide a review in
a timeframe that usually expected.


Thanks,
Mathieu

On Mon, Nov 15, 2021 at 02:50:29PM +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/[e-mail]/
> to be able to set the Cortex-R7 boot address.
> 
> 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 1/3 adds the dt-bindings
> 
> Patch 2/3 adds entries into the dts/dtsi files for r8a77951,
> my testing platform. This driver has also been tested on E3 and M3,
> but lacks proper zephyr support at the moment.
> 
> Modifications to r8a77951-ulcb.dts are given as usage example
> and may be dropped in future patchset since it use some memory
> range that may be reserved for other usage.
> 
> Patch 3/3 is a small driver to cover basic remoteproc
> usage: loading firmware from filesystem, starting and stopping the
> Cortex-r7 processor.
> 
> Julien Massot (3):
>   dt-bindings: remoteproc: Add Renesas R-Car
>   arm64: dts: renesas: r8a77951: Add CR7 realtime processor
>   remoteproc: Add Renesas rcar driver
> 
>  .../remoteproc/renesas,rcar-rproc.yaml        |  66 +++++
>  arch/arm64/boot/dts/renesas/r8a77951-ulcb.dts |  15 ++
>  arch/arm64/boot/dts/renesas/r8a77951.dtsi     |   7 +
>  drivers/remoteproc/Kconfig                    |  12 +
>  drivers/remoteproc/Makefile                   |   1 +
>  drivers/remoteproc/rcar_rproc.c               | 226 ++++++++++++++++++
>  6 files changed, 327 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml
>  create mode 100644 drivers/remoteproc/rcar_rproc.c
> 
> -- 
> 2.31.1
> 
>