From: Austin Christ <redacted>

Add ACPI support to I2C QUP driver and get properties from ACPI table.

Add support to the I2C QUP driver to correctly handle SMBus block reads by
checking I2C_M_RECV_LEN flag and reading the first byte received as the
message length.

Documentation for the two properites used from ACPI has been submitted through
dsd at acpica.org to https://github.com/ahs3/dsd. The documentation can be viewed
at https://lists.acpica.org/pipermail/dsd/2016-September/000095.html.

[V6]
 - correct block size for SMBus data read
[V5]
 - remove warning and use correct ACPI function
[V4]
 - correct error code
 - remove warning for fall back to default clock frequency
[V3]
 - clean up unused variables
 - use constant instead of variable for smbus length field
[V2]
 - rework the smbus block read and break into separate function
 - clean up redundant checks and variables

Naveen Kaje (2):
  i2c: qup: add ACPI support
  i2c: qup: support SMBus block read

 drivers/i2c/busses/i2c-qup.c | 122 ++++++++++++++++++++++++++++++++++++-------
 1 file changed, 103 insertions(+), 19 deletions(-)

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