From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
To: Brendan Higgins <brendanhiggins@google.com>,
Wolfram Sang <wsa@the-dreams.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Joel Stanley <joel@jms.id.au>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Andrew Jeffery <andrew@aj.id.au>, Tao Ren <taoren@fb.com>,
Cedric Le Goater <clg@kaod.org>
Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-aspeed@lists.ozlabs.org, openbmc@lists.ozlabs.org,
Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Subject: [PATCH i2c-next 0/2] i2c: aspeed: Add H/W timeout support
Date: Mon, 21 Oct 2019 13:24:12 -0700 [thread overview]
Message-ID: <20191021202414.17484-1-jae.hyun.yoo@linux.intel.com> (raw)
In case of multi-master environment, if a peer master incorrectly handles
a bus in the middle of a transaction, I2C hardware hangs in slave state
and it can't escape from the slave state, so this commit adds slave
inactive timeout support to recover the bus in the case.
By applying this change, SDA data-low and SCL clock-low timeout feature
also can be enabled which was disabled previously.
Jae Hyun Yoo (2):
dt-bindings: i2c: aspeed: add hardware timeout support
i2c: aspeed: add slave inactive timeout support
.../devicetree/bindings/i2c/i2c-aspeed.txt | 2 +
drivers/i2c/busses/i2c-aspeed.c | 82 +++++++++++++++++--
2 files changed, 78 insertions(+), 6 deletions(-)
--
2.23.0
next reply other threads:[~2019-10-21 20:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-21 20:24 Jae Hyun Yoo [this message]
2019-10-21 20:24 ` [PATCH i2c-next 1/2] dt-bindings: i2c: aspeed: add hardware timeout support Jae Hyun Yoo
2019-10-21 21:05 ` Peter Rosin
2019-10-21 21:57 ` Jae Hyun Yoo
2019-10-22 4:56 ` Wolfram Sang
2019-10-22 17:09 ` Jae Hyun Yoo
2019-10-22 8:45 ` Peter Rosin
2019-10-22 17:44 ` Jae Hyun Yoo
2019-10-23 21:17 ` Peter Rosin
2019-10-23 22:09 ` Tao Ren
2019-10-24 0:09 ` Brendan Higgins
2019-10-24 17:27 ` Jae Hyun Yoo
2019-10-21 20:24 ` [PATCH i2c-next 2/2] i2c: aspeed: add slave inactive " Jae Hyun Yoo
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