Add a binding and a driver for the I2C IP found in the Socionext SynQuacer
SoC, which is essentially a rebranded version of the Fujitsu F_I2C controller.

v4:
- clarify binding that only a single interrupt specifier is expected (#1)
- check return value of clk_prepare_enable() on probe path (#2)
- add Andy's R-b to patch #2

v3:
- incorporate more of Andy's review comments (#2), especially regarding the
  bus speed and clock source handling for ACPI
- patch #1 unchanged.

v2:
- incorporate Andy's review comments (#2)
- patch #1 unchanged.

Ard Biesheuvel (2):
  dt-bindings: i2c: add binding for Socionext SynQuacer I2C
  i2c: add support for Socionext SynQuacer I2C controller

 Documentation/devicetree/bindings/i2c/i2c-synquacer.txt |  29 +
 drivers/i2c/busses/Kconfig                              |  10 +
 drivers/i2c/busses/Makefile                             |   1 +
 drivers/i2c/busses/i2c-synquacer.c                      | 792 ++++++++++++++++++++
 4 files changed, 832 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-synquacer.txt
 create mode 100644 drivers/i2c/busses/i2c-synquacer.c

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2.11.0