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Subject[PATCH v10 0/7] Add support for mt8183 SCP.
Date
Add support for controlling and communicating with mt8183's system
control processor (SCP), using the remoteproc & rpmsg framework.
And also add a cros_ec driver for CrOS EC host command over rpmsg.

The overall structure of the series is:
* remoteproc/mtk_scp.c: Control the start / stop of SCP (Patch 2, 3).
* remoteproc/mtk_scp_ipi.c: Communicates to SCP using inter-processor
interrupt (IPI) and shared memory (Patch 2, 3).
* rpmsg/mtk_rpmsg.c: Wrapper to wrap the IPI communication into a rpmsg
device. Supports name service for SCP firmware to
announce channels (Patch 4).
* platform/chrome/cros_ec_rpmsg.c: Communicates with the SCP over the
rpmsg framework (like what platform/chrome/cros_ec_{i2c,spi}.c does)
(Patch 5, 6).
* add scp dts node to mt8183 platform (Patch 7).

This series (In particular, Patch 7) is based on
https://patchwork.kernel.org/cover/10962385/.

Changes from v9:
- Remove reserve-memory-vpu_share node.
- Remove change to cros_ec_commands.h (That is already in
https://lore.kernel.org/lkml/20190518063949.GY4319@dell/T/)

Changes from v8:
- Rebased onto https://patchwork.kernel.org/cover/10962385/.
- Drop merged cros_ec_rpmsg patch, and add scp dts node patch.
- Add more reserved memory region.

Changes from v7:
- Rebase onto https://lore.kernel.org/patchwork/patch/1059196/.
- Fix clock enable/disable timing for SCP driver.
- Add more SCP IPI ID.

Changes from v6:
- Decouple mtk_rpmsg from mtk_scp.
- Change data of EC response to be aligned to 4 bytes.

Changes from v5:
- Add device tree binding document for cros_ec_rpmsg.
- Better document in comments for cros_ec_rpmsg.
- Remove dependency on CONFIG_ in binding tree document.

Changes from v4:
- Merge patch 6 (Load ELF firmware) into patch 2, so the driver loads
ELF firmware by default, and no longer accept plain binary.
- rpmsg_device listed in device tree (as a child of the SCP node) would
have it's device tree node mapped to the rpmsg_device, so the rpmsg
driver can use the properties on device tree.

Changes from v3:
- Make writing to SCP SRAM aligned.
- Add a new patch (Patch 6) to load ELF instead of bin firmware.
- Add host event support for EC driver.
- Fix some bugs found in testing (missing spin_lock_init,
rproc_subdev_unprepare to rproc_subdev_stop).
- Fix some coding style issue found by checkpatch.pl.

Changes from v2:
- Fold patch 3 into patch 2 in v2.
- Move IPI id around to support cross-testing for old and new firmware.
- Finish more TODO items.

Changes from v1:
- Extract functions and rename variables in mtk_scp.c.
- Do cleanup properly in mtk_rpmsg.c, which also removes the problem of
short-lived work items.
- Code format fix based on feedback for cros_ec_rpmsg.c.
- Extract feature detection for SCP into separate patch (Patch 6).

Eddie Huang (1):
arm64: dts: mt8183: add scp node

Erin Lo (3):
dt-bindings: Add a binding for Mediatek SCP
remoteproc/mediatek: add SCP support for mt8183
remoteproc: mt8183: add reserved memory manager API

Pi-Hsun Shih (3):
rpmsg: add rpmsg support for mt8183 SCP.
dt-bindings: Add binding for cros-ec-rpmsg.
mfd: cros_ec: differentiate SCP from EC by feature bit.

.../devicetree/bindings/mfd/cros-ec.txt | 5 +-
.../bindings/remoteproc/mtk,scp.txt | 36 +
arch/arm64/boot/dts/mediatek/mt8183-evb.dts | 11 +
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 12 +
drivers/mfd/cros_ec_dev.c | 10 +
drivers/remoteproc/Kconfig | 10 +
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/mtk_common.h | 77 ++
drivers/remoteproc/mtk_scp.c | 678 ++++++++++++++++++
drivers/remoteproc/mtk_scp_ipi.c | 163 +++++
drivers/rpmsg/Kconfig | 9 +
drivers/rpmsg/Makefile | 1 +
drivers/rpmsg/mtk_rpmsg.c | 396 ++++++++++
include/linux/mfd/cros_ec.h | 1 +
include/linux/platform_data/mtk_scp.h | 167 +++++
include/linux/rpmsg/mtk_rpmsg.h | 30 +
16 files changed, 1606 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
create mode 100644 drivers/remoteproc/mtk_common.h
create mode 100644 drivers/remoteproc/mtk_scp.c
create mode 100644 drivers/remoteproc/mtk_scp_ipi.c
create mode 100644 drivers/rpmsg/mtk_rpmsg.c
create mode 100644 include/linux/platform_data/mtk_scp.h
create mode 100644 include/linux/rpmsg/mtk_rpmsg.h

--
2.22.0.rc1.257.g3120a18244-goog

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