From: Cyril Bur <cyrilbur-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
arnd-r2nGTMty4D4@public.gmane.org,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org
Cc: joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
openbmc-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
andrew-zrmu5oMJ5Fs@public.gmane.org,
benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org,
xow-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
jk-mnsaURCQ41sdnm+yROfE0A@public.gmane.org
Subject: [PATCH 0/4] ASpeed mailbox and LPC control drivers
Date: Thu, 12 Jan 2017 11:29:06 +1100 [thread overview]
Message-ID: <20170112002910.3650-1-cyrilbur@gmail.com> (raw)
Hello,
I have written some drivers for the ASpeed AST2400/2500 chips. These
chips are designed to be used as BMCs and the core reason for these
drivers has been to introduce a communication channel between two
processors.
The mailbox registers are the channel through which the two processors
can communicate, it is worth noting here that the mailbox driver is
designed to be flexible enough do allow userspace to arbitrarily write
to one or all or a subset of the mailbox registers. This is important
as the ASpeed chip allows for enabling hardware interrupts based on
writes at a per data register level. It is possible that the other
processor will enable interrupts on one of the data registers, as
such, the ASpeed end of the protocol will need to be able to treat
that register specially.
The first intended use of a communication protocol between the ASpeed
and the other processor is so they can arbitrate on board flash chip
access. The goal is to have the ASpeed chip perform the reads and
writes to the flash and present to the other processor in an area of
its RAM across a shared bus. Currently the other processor has the
flash mapped directly on the shared bus. The LPC bus controlling
driver provides a way for the ASpeed userspace to control the mapping
across the LPC bus between the ASpeed and the other processor. The RAM
region that the LPC control driver will use should be specified in the
device tree.
Cyril Bur (4):
Documentation: dt: mailbox: Add Aspeed ast2400/2500 bindings
Documentation: dt: misc: Add Aspeed ast2400/2500 LPC Control bindings
drivers/misc: Add ASpeed LPC control driver
drivers/mailbox: Add ASpeed mailbox driver
.../devicetree/bindings/mailbox/aspeed-mbox.txt | 44 +++
.../devicetree/bindings/misc/aspeed-lpc-ctrl.txt | 78 +++++
drivers/mailbox/Kconfig | 9 +
drivers/mailbox/Makefile | 2 +
drivers/mailbox/aspeed-mbox.c | 334 +++++++++++++++++++++
drivers/misc/Kconfig | 9 +
drivers/misc/Makefile | 1 +
drivers/misc/aspeed-lpc-ctrl.c | 269 +++++++++++++++++
include/uapi/linux/aspeed-lpc-ctrl.h | 25 ++
9 files changed, 771 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mailbox/aspeed-mbox.txt
create mode 100644 Documentation/devicetree/bindings/misc/aspeed-lpc-ctrl.txt
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
--
2.11.0
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next reply other threads:[~2017-01-12 0:29 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 0:29 Cyril Bur [this message]
[not found] ` <20170112002910.3650-1-cyrilbur-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-01-12 0:29 ` [PATCH 1/4] Documentation: dt: mailbox: Add Aspeed ast2400/2500 bindings Cyril Bur
[not found] ` <20170112002910.3650-2-cyrilbur-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-01-18 20:38 ` Rob Herring
2017-01-19 0:05 ` Cyril Bur
[not found] ` <1484784318.4097.2.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-01-19 15:08 ` Benjamin Herrenschmidt
2017-01-12 0:29 ` [PATCH 2/4] Documentation: dt: misc: Add Aspeed ast2400/2500 LPC Control bindings Cyril Bur
[not found] ` <20170112002910.3650-3-cyrilbur-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-01-18 21:16 ` Rob Herring
2017-01-19 0:19 ` Cyril Bur
2017-01-12 0:29 ` [PATCH 3/4] drivers/misc: Add ASpeed LPC control driver Cyril Bur
[not found] ` <20170112002910.3650-4-cyrilbur-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-01-12 7:43 ` Greg KH
[not found] ` <20170112074312.GA23943-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-01-12 15:36 ` Benjamin Herrenschmidt
2017-01-12 7:47 ` Greg KH
[not found] ` <20170112074750.GB23943-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-01-12 10:16 ` Cyril Bur
[not found] ` <1484216163.11416.8.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-01-12 10:30 ` Greg KH
[not found] ` <20170112103038.GA19239-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-01-12 15:27 ` Benjamin Herrenschmidt
[not found] ` <1484234867.2492.39.camel-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2017-01-12 16:00 ` Greg KH
[not found] ` <20170112160051.GB8095-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-01-12 16:07 ` Benjamin Herrenschmidt
[not found] ` <1484237253.2492.43.camel-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2017-01-12 16:26 ` Greg KH
[not found] ` <20170112162619.GB10283-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-01-12 16:31 ` Benjamin Herrenschmidt
2017-01-12 15:35 ` Benjamin Herrenschmidt
[not found] ` <1484235315.2492.41.camel-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2017-01-12 16:27 ` Greg KH
2017-01-12 16:29 ` Benjamin Herrenschmidt
[not found] ` <1484238577.2492.45.camel-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2017-01-12 17:27 ` Greg KH
2017-01-12 0:29 ` [PATCH 4/4] drivers/mailbox: Add ASpeed mailbox driver Cyril Bur
[not found] ` <20170112002910.3650-5-cyrilbur-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-07 5:40 ` Joel Stanley
[not found] ` <CACPK8XcsScjrit-7VHh4oL=zPiMeEAB5_R550U0uPsuQ4WF1mg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-02-07 5:44 ` Benjamin Herrenschmidt
2017-02-07 22:57 ` Cyril Bur
[not found] ` <1486508229.3824.1.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-07 22:59 ` Joel Stanley
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