From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: linux-i2c@vger.kernel.org
Subject: [PATCH 0/2] Use master-abort for slave probes
Date: Wed, 6 May 2020 10:36:15 +0100 [thread overview]
Message-ID: <20200506093615.GO1551@shell.armlinux.org.uk> (raw)
Hi,
This series allows us to use the "master abort" feature when probing
slaves rather than resetting the controller, which allows more
graceful recovery to bus free state after sending the address byte.
The i2c-pxa controller expects to send data after the address byte
rather than a stop. Rather than resetting the bus (and thus forcing
a bus-free state by releasing the SCL line) which may leave the bus
in an indeterminant state, use the master-abort command instead.
This patch series applies on top of the previous posted cleanup patches,
although it may also apply to -rc.
drivers/i2c/busses/i2c-pxa.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up
next reply other threads:[~2020-05-06 9:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-06 9:36 Russell King - ARM Linux admin [this message]
2020-05-06 9:36 ` [PATCH 1/2] i2c: pxa: clear all master action bits in i2c_pxa_stop_message() Russell King
2020-05-12 10:38 ` Wolfram Sang
2020-05-06 9:36 ` [PATCH 2/2] i2c: pxa: use master-abort for device probes Russell King
2020-05-12 10:39 ` Wolfram Sang
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