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Chris Brandt f04d92e105 i2c: riic: correctly finish transfers ... [ Upstream commit 71ccea095e ] This fixes the condition where the controller has not fully completed its final transfer and leaves the bus and controller in a undesirable state. At the end of the last transmitted byte, the existing driver would just signal for a STOP condition to be transmitted then immediately signal completion. However, the full STOP procedure might not have fully taken place by the time the runtime PM shuts off the peripheral clock, leaving the bus in a suspended state. Alternatively, the STOP condition on the bus may have completed, but when the next transaction is requested by the upper layer, not all the necessary register cleanup was finished from the last transfer which made the driver return BUS BUSY when it really wasn't. This patch now makes all transmit and receive transactions wait for the STOP condition to fully complete before signaling a completed transaction. With this new method, runtime PM no longer seems to be an issue. Fixes: 310c18a414 ("i2c: riic: add driver") Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2017-11-08 10:08:34 +01:00
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algos	i2c: algo-bit: declare i2c_bit_quirk_no_clk_stretch as static	2016-05-11 17:16:30 +02:00
busses	i2c: riic: correctly finish transfers	2017-11-08 10:08:34 +01:00
muxes	i2c: mux: pca954x: fix i2c mux selection caching	2017-01-19 20:18:05 +01:00
i2c-boardinfo.c	i2c: remove __init from i2c_register_board_info()	2016-06-19 14:13:50 +02:00
i2c-core.c	i2c: print correct device invalid address	2017-01-19 20:18:02 +01:00
i2c-core.h	i2c: remove FSF address	2014-11-07 18:35:33 +01:00
i2c-dev.c	i2c: fix kernel memory disclosure in dev interface	2017-01-19 20:18:02 +01:00
i2c-mux.c	i2c: add missing of_node_put in i2c_mux_del_adapters	2017-03-18 19:14:30 +08:00
i2c-slave-eeprom.c	i2c: Drop owner assignment from i2c_driver	2015-08-10 08:37:35 +02:00
i2c-smbus.c	i2c: i2c-smbus: fix i2c_handle_smbus_host_notify documentation	2016-07-18 20:09:54 +02:00
i2c-stub.c	i2c: i2c-stub: sort includes	2016-02-20 23:33:39 +01:00
Kconfig	i2c: mux: fix up dependencies	2016-11-14 18:23:30 +01:00
Makefile	i2c: slave-eeprom: add eeprom simulator driver	2014-12-11 22:25:54 +01:00