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alistair23-linux/drivers/i2c
Christian Eggers ed201cb54d i2c: imx: Don't generate STOP condition if arbitration has been lost
commit 61e6fe59ed upstream.

If arbitration is lost, the master automatically changes to slave mode.
I2SR_IBB may or may not be reset by hardware. Raising a STOP condition
by resetting I2CR_MSTA has no effect and will not clear I2SR_IBB.

So calling i2c_imx_bus_busy() is not required and would busy-wait until
timeout.

Signed-off-by: Christian Eggers <ceggers@arri.de>
Tested (not extensively) on Vybrid VF500 (Toradex VF50):
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: stable@vger.kernel.org # Requires trivial backporting, simple remove
                           # the 3rd argument from the calls to
                           # i2c_imx_bus_busy().
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-11 13:23:29 +01:00
..
algos i2c: algo: pca: Reapply i2c bus settings after reset 2020-09-23 12:40:38 +02:00
busses i2c: imx: Don't generate STOP condition if arbitration has been lost 2020-12-11 13:23:29 +01:00
muxes i2c: mux: demux-pinctrl: Fix an error handling path in 'i2c_demux_pinctrl_probe()' 2020-05-27 17:46:18 +02:00
Kconfig docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
Makefile i2c: don't use any __deprecated handling anymore 2018-08-24 17:26:43 +02:00
i2c-boardinfo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
i2c-core-acpi.c i2c: core: Restore acpi_walk_dep_device_list() getting called after registering the ACPI i2c devs 2020-10-29 09:58:00 +01:00
i2c-core-base.c i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices() 2020-10-01 13:18:15 +02:00
i2c-core-of.c i2c: core: fix use after free in of_i2c_notify 2019-11-15 22:01:13 +01:00
i2c-core-slave.c i2c: slave: add sanity check when unregistering 2020-08-11 15:33:37 +02:00
i2c-core-smbus.c i2c: core: check returned size of emulated smbus block read 2020-06-30 15:37:02 -04:00
i2c-core.h Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-07-15 21:10:39 -07:00
i2c-dev.c i2c: dev: Fix the race between the release of i2c_dev and cdev 2020-05-27 17:46:07 +02:00
i2c-mux.c i2c: mux: add sysfs header 2019-06-22 07:32:33 +02:00
i2c-slave-eeprom.c i2c: slave-eeprom: Add read only mode 2019-09-28 20:44:12 +02:00
i2c-smbus.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
i2c-stub.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00