Marek Behún 39930213e7 i2c: mv64xxx: Fix random system lock caused by runtime PM ... I noticed a weird bug with this driver on Marvell CN9130 Customer Reference Board. Sometime after boot, the system locks with the following message: [104.071363] i2c i2c-0: mv64xxx: I2C bus locked, block: 1, time_left: 0 The system does not respond afterwards, only warns about RCU stalls. This first appeared with commit e5c02cf541 ("i2c: mv64xxx: Add runtime PM support"). With further experimentation I discovered that adding a delay into mv64xxx_i2c_hw_init() fixes this issue. This function is called before every xfer, due to how runtime PM works in this driver. It seems that in order to work correctly, a delay is needed after the bus is reset in this function. Since there already is a known erratum with this controller needing a delay, I assume that this is just another place this needs to be applied. Therefore I apply the delay only if errata_delay is true. Signed-off-by: Marek Behún <kabel@kernel.org> Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com> Reviewed-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>		2021-04-15 22:13:19 +02:00
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algos	i2c: algo: bit: use new macro to specifiy capabilities	2021-01-22 09:59:21 +01:00
busses	i2c: mv64xxx: Fix random system lock caused by runtime PM	2021-04-15 22:13:19 +02:00
muxes	i2c: mux: mlxcpld: Add callback to notify mux creation completion	2021-02-09 11:35:44 +01:00
Kconfig	i2c: add slave testunit driver	2020-09-21 11:02:17 +02:00
Makefile	i2c: add slave testunit driver	2020-09-21 11:02:17 +02:00
i2c-boardinfo.c	…
i2c-core-acpi.c	i2c: core: Do not print duplicate error when failing to register an i2c-client from ACPI	2021-01-05 10:59:11 +01:00
i2c-core-base.c	i2c: turn recovery error on init to debug	2021-03-18 12:18:48 +01:00
i2c-core-of.c	…
i2c-core-slave.c	i2c: slave: add sanity check when unregistering	2020-07-28 18:37:17 +02:00
i2c-core-smbus.c	i2c: smbus: improve naming in i2c_smbus_xfer_emulated()	2021-01-28 10:14:34 +01:00
i2c-core.h	i2c: acpi: Remove dead code, i.e. i2c_acpi_match_device()	2020-08-25 09:22:09 +02:00
i2c-dev.c	i2c: Use separate MODULE_AUTHOR() statements for multiple authors	2020-07-04 08:25:13 +02:00
i2c-mux.c	…
i2c-slave-eeprom.c	i2c: busses: Use fallthrough pseudo-keyword	2020-07-23 22:04:08 +02:00
i2c-slave-testunit.c	i2c: testunit: add support for block process calls	2021-02-12 11:11:04 +01:00
i2c-smbus.c	i2c: smbus: add core function handling SMBus host-notify	2020-09-09 10:38:28 +02:00
i2c-stub.c	i2c: stub: remove definition of DEBUG	2021-01-17 13:00:10 +01:00