[PATCH v2 0/5] LPC/MBOX work

[Cyril Bur]

Hi all,

Sending this v2 a little prematurely but it will be good to have some eyes on it.

I haven't been able to boot the host with this as there are quite a few caveats.
First of all hostboot expects the flash at a very specific place on the host LPC
bus per platform. This creates problems when a machine of a certain type has a
flash chip of a different size as to what it should have. This renders the UNMAP
ioctl() somewhat useless. We should be able to compensate for this in userspace,
which is good since I don't want any of these caveats worked around in the kernel.

I have had some troubles with regmap_write() but it is possible the bug has been
fixed. I will test in the coming days and confirm.

I have attempted to address all the review comments:
 - Use of regmap
 - Open counts to avoid opening by different processes
 - Style fixes
 - Move mbox to drivers/mailbox
 - Extra descriptions

Notable exception that I haven't gotten around to but will happily do once we
get to a working state is preventing mutiple threads from writing mbox registers
at once

Thanks,

Cyril 

Cyril Bur (5):
  ARM: dts: aspeed: Reserve BMC ram for host to BMC communication
  ARM: dts: aspeed: Put the lpc_ctrl under lpc_host node for regmap
  ARM: dts: aspeed: Move mbox under lpc_host node
  drivers/mailbox: Add aspeed ast2400/ast2500 mbox driver
  drivers/misc: Add aspeed ast2400/ast2500 lpc controlling driver

 arch/arm/boot/dts/aspeed-bmc-opp-barreleye.dts |   6 +
 arch/arm/boot/dts/aspeed-bmc-opp-firestone.dts |   6 +
 arch/arm/boot/dts/aspeed-bmc-opp-garrison.dts  |   6 +
 arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts  |   7 +
 arch/arm/boot/dts/aspeed-g4.dtsi               |  36 +++
 drivers/mailbox/Kconfig                        |   9 +
 drivers/mailbox/Makefile                       |   3 +
 drivers/mailbox/aspeed-mbox.c                  | 354 +++++++++++++++++++++++++
 drivers/misc/Kconfig                           |   9 +
 drivers/misc/Makefile                          |   1 +
 drivers/misc/aspeed-lpc-ctrl.c                 | 292 ++++++++++++++++++++
 include/uapi/linux/aspeed-lpc-ctrl.h           |  25 ++
 include/uapi/linux/aspeed-mbox.h               |  23 ++
 13 files changed, 777 insertions(+)
 create mode 100644 drivers/mailbox/aspeed-mbox.c
 create mode 100644 drivers/misc/aspeed-lpc-ctrl.c
 create mode 100644 include/uapi/linux/aspeed-lpc-ctrl.h
 create mode 100644 include/uapi/linux/aspeed-mbox.h

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2.11.0