On Thu, May 31, 2018 at 12:07 AM, Eddie James <eajames@xxxxxxxxxxxxxxxxxx> wrote: > This series adds an algorithm for an I2C master physically located on an FSI > slave device. The I2C master has multiple ports, each of which may be connected > to an I2C slave. Access to the I2C master registers is achieved over FSI bus. > > Due to the multi-port nature of the I2C master, the driver instantiates a new > I2C adapter for each port connected to a slave. The connected ports should be > defined in the device tree under the I2C master device. I'll comment the series later, though you have to address previous comments first: - understand devm_ purpose and how it works - understand list_for_each*() macros - discuss with maintainer a design of enumerating ports - ... (whatever I forgot and others added) ... > Changes since v7 > - Fix grammer in Kconfig (a -> an) > - Change I2C registers to use BIT and GENMASK > - Remove custom macros and use FIELD_PREP and FIELD_GET > - Fix a few unecessary initializations and "return rc" that are always zero > - Clean up the read/write fifo functions a bit > - Few other clean-up items > > Changes since v6 > - Remove spinlock for reset functionality; it's unecessary and doesn't work > with the latest FSI core. > - Use a mutex instead of a semaphore, and don't wait for timeout to get the > lock. > - Use usleeps instead of schedule_timeout; it's not worth the overhead when > the wait should be very short in between sending the command and receiving > the response. > > Changes since v5 > - Fix reset functionality and do a reset after every transfer failure > > Eddie James (7): > dt-bindings: i2c: Add FSI-attached I2C master dt binding documentation > i2c: Add FSI-attached I2C master algorithm > i2c: fsi: Add port structures > i2c: fsi: Add abort and hardware reset procedures > i2c: fsi: Add transfer implementation > i2c: fsi: Add I2C master locking > i2c: fsi: Add bus recovery > > Documentation/devicetree/bindings/i2c/i2c-fsi.txt | 40 ++ > drivers/i2c/busses/Kconfig | 11 + > drivers/i2c/busses/Makefile | 1 + > drivers/i2c/busses/i2c-fsi.c | 722 ++++++++++++++++++++++ > 4 files changed, 774 insertions(+) > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-fsi.txt > create mode 100644 drivers/i2c/busses/i2c-fsi.c > > -- > 1.8.3.1 > -- With Best Regards, Andy Shevchenko
