From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
Alain Volmat <alain.volmat@st.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: [PATCH RFC 0/1] i2c: add slave testunit driver
Date: Mon, 29 Jun 2020 20:53:17 +0200 [thread overview]
Message-ID: <20200629185318.23381-1-wsa+renesas@sang-engineering.com> (raw)
Motivated by a series by Alain Volmat which implements SMBus Host Notify
support as a slave backend[1], I wondered how I could actually test it.
Then, I picked up my old idea of a "custom remote device" and
implemented it as another slave backend. This is the first draft and it
works quite well on my Renesas Lager board where I connected two I2C
busses where both I2C controllers are master and slave. One slave is the
testunit, one slave is the HostNotify listener.
While I really like Alain's approach, there is still some more testing
needed. So, I already release my testing environment, maybe other people
are interested, too. This patch depends on a documentation update. Also,
for Renesas R-Car SoCs, some fixes are needed. I suggest you simply pull
this branch here:
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/i2c/slave-testunit
As mentioned elsewhere, support for SMBus Alert and I2C_M_RECV_LEN are
already planned. But I guess you can do much more.
Ideas and comments welcome!
Happy hacking,
Wolfram
[1] http://patchwork.ozlabs.org/project/linux-i2c/list/?series=185718&state=*
Wolfram Sang (1):
i2c: add slave testunit driver
Documentation/i2c/slave-testunit-backend.rst | 48 ++++++
drivers/i2c/Kconfig | 8 +
drivers/i2c/Makefile | 1 +
drivers/i2c/i2c-slave-testunit.c | 146 +++++++++++++++++++
4 files changed, 203 insertions(+)
create mode 100644 Documentation/i2c/slave-testunit-backend.rst
create mode 100644 drivers/i2c/i2c-slave-testunit.c
--
2.20.1
next reply other threads:[~2020-06-29 19:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 18:53 Wolfram Sang [this message]
2020-06-29 18:53 ` [PATCH RFC 1/1] i2c: add slave testunit driver Wolfram Sang
2020-07-01 8:30 ` [PATCH RFC 0/1] " Alain Volmat
2020-07-01 8:57 ` Wolfram Sang
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