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| author |   Hans de Goede <hdegoede@redhat.com> | 2017-03-13 23:25:10 +0100 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2017-03-22 09:53:48 +0100 |
| commit | a3d411fb38c0472ce96aea58062db87cc9357780 (patch) | |
| tree | 4c16595d6b837255a5113ab7278961e8ebca529e /Documentation/devicetree/bindings/i2c | |
| parent | i2c: designware: Never suspend i2c-busses used for accessing the system PMIC (diff) | |
| download | linux-dev-a3d411fb38c0472ce96aea58062db87cc9357780.tar.xz linux-dev-a3d411fb38c0472ce96aea58062db87cc9357780.zip | |
i2c: designware: Disable pm for PMIC i2c-bus even if there is no _SEM method
Cherrytrail devices use the dw i2c-bus with uid 7 to access their PMIC.
Even if the i2c-bus to the PMIC is not shared with the SoC's P-Unit
and i2c-designware-baytrail.c thus does not set the pm_disabled flag,
we still need to disable pm so that ACPI PMIC opregions can access the
PMIC during late-suspend and early-resume.
This fixes errors like these blocking suspend:
i2c_designware 808622C1:06: timeout waiting for bus ready
ACPI Exception: AE_ERROR, Returned by Handler for [UserDefinedRegion]
acpi 80860F14:02: Failed to change power state to D3hot
PM: late suspend of devices failed
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation/devicetree/bindings/i2c')
0 files changed, 0 insertions, 0 deletions