kernel/linux.git/drivers/i2c/busses, branch linux-4.16.y

i2c: viperboard: return message count on master_xfer success

2018-06-20T19:01:45+00:00

[ Upstream commit 35cd67a0caf767aba472452865dcb4471fcce2b1 ] Returning zero is wrong in this case. Signed-off-by: Peter Rosin Signed-off-by: Wolfram Sang Fixes: 174a13aa8669 ("i2c: Add viperboard i2c master driver") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

i2c: pmcmsp: fix error return from master_xfer

2018-06-20T19:01:45+00:00

[ Upstream commit 12d9bbc5a7f347eaa65ff2a9d34995cadc05eb1b ] Returning -1 (-EPERM) is not appropriate here, go with -EIO. Signed-off-by: Peter Rosin Signed-off-by: Wolfram Sang Fixes: 1b144df1d7d6 ("i2c: New PMC MSP71xx TWI bus driver") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

i2c: pmcmsp: return message count on master_xfer success

2018-06-20T19:01:44+00:00

[ Upstream commit de9a8634f1cb4560a35696d472cc7f1383d9b866 ] Returning zero is wrong in this case. Signed-off-by: Peter Rosin Signed-off-by: Wolfram Sang Fixes: 1b144df1d7d6 ("i2c: New PMC MSP71xx TWI bus driver") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

i2c: sprd: Fix the i2c count issue

2018-06-20T19:01:28+00:00

[ Upstream commit 2a010461207cc96bee5ab81748325dec1972976f ] We found the I2C controller count register is unreliable sometimes, that will cause I2C to lose data. Thus we can read the data count from 'i2c_dev->count' instead of the I2C controller count register. Signed-off-by: Baolin Wang Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

i2c: sprd: Prevent i2c accesses after suspend is called

2018-06-20T19:01:28+00:00

[ Upstream commit da33aa03fa34c918faf2c371ebda0dd961d7ccb2 ] Add one flag to indicate if the i2c controller has been in suspend state, which can prevent i2c accesses after i2c controller is suspended following system suspend. Signed-off-by: Baolin Wang Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

i2c: mv64xxx: Apply errata delay only in standard mode

2018-05-30T06:17:32+00:00

[ Upstream commit 31184d8c6ea49ea0676d100cdd7e1f102ad025b5 ] The errata FE-8471889 description has been updated. There is still a timing violation for repeated start. But the errata now states that it was only the case for the Standard mode (100 kHz), in Fast mode (400 kHz) there is no issue. This patch limit the errata fix to the Standard mode. It has been tesed successfully on the clearfog (Aramda 388 based board). Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

i2c: designware: fix poll-after-enable regression

2018-05-22T16:56:22+00:00

commit 06cb616b1bca7080824acfedb3d4c898e7a64836 upstream. Not all revisions of DW I2C controller implement the enable status register. On platforms where that's the case (e.g. BG2CD and SPEAr ARM SoCs), waiting for enable will time out as reading the unimplemented register yields zero. It was observed that reading the IC_ENABLE_STATUS register once suffices to avoid getting it stuck on Bay Trail hardware, so replace polling with one dummy read of the register. Fixes: fba4adbbf670 ("i2c: designware: must wait for enable") Signed-off-by: Alexander Monakov Tested-by: Ben Gardner Acked-by: Jarkko Nikula Signed-off-by: Wolfram Sang Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman

i2c: i801: Restore configuration at shutdown

2018-04-24T07:42:54+00:00

commit f7f6d915a10f7f2bce17e3b1b7d3376562395a28 upstream. On some systems, the BIOS expects certain SMBus register values to match the hardware defaults. Restore these configuration registers at shutdown time to avoid confusing the BIOS. This avoids hard-locking such systems upon reboot. Signed-off-by: Jean Delvare Tested-by: Jason Andryuk Signed-off-by: Wolfram Sang Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

i2c: i801: Save register SMBSLVCMD value only once

2018-04-24T07:42:54+00:00

commit a086bb8317303dd74725dca933b9b29575159382 upstream. Saving the original value of register SMBSLVCMD in i801_enable_host_notify() doesn't work, because this function is called not only at probe time but also at resume time. Do it in i801_probe() instead, so that the saved value is not overwritten at resume time. Signed-off-by: Jean Delvare Fixes: 22e94bd6779e ("i2c: i801: store and restore the SLVCMD register at load and unload") Reviewed-by: Benjamin Tissoires Tested-by: Jason Andryuk Signed-off-by: Wolfram Sang Cc: stable@vger.kernel.org # v4.10+ Signed-off-by: Greg Kroah-Hartman

i2c: i2c-stm32f7: fix no check on returned setup

2018-03-24T12:37:41+00:00

Before assigning returned setup structure check if not null Fixes: 463a9215f3ca7600b5ff ("i2c: stm32f7: fix setup structure") Signed-off-by: Pierre-Yves MORDRET Acked-by: Alexandre TORGUE Signed-off-by: Wolfram Sang Cc: stable@kernel.org