Wolfram, On Fri, Feb 15, 2013 at 11:46 AM, Doug Anderson <dianders@xxxxxxxxxxxx> wrote: > The i2c-arbitrator-cros-ec driver implements the arbitration scheme > that the Embedded Controller (EC) on the ARM Chromebook expects to use > for bus multimastering. This i2c-arbitrator-cros-ec driver could also > be used in other places where standard I2C bus arbitration can't be > used and two extra GPIOs are available for arbitration. > > This driver is based on code that Simon Glass added to the i2c-s3c2410 > driver in the Chrome OS kernel 3.4 tree. The current incarnation as a > mux driver is as suggested by Grant Likely. See > <https://patchwork.kernel.org/patch/1877311/> for some history. > > Signed-off-by: Doug Anderson <dianders@xxxxxxxxxxxx> > Signed-off-by: Simon Glass <sjg@xxxxxxxxxxxx> > Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx> > --- > Changes in v3: > - Handle of_find_i2c_adapter_by_node() failure more properly by > changing init order. > - Don't warn on -EPROBE_DEFER from calls that could return it. > - Move to module_platform_driver(). As we pull in parts of the system > that rely on devices under this i2c bus we'll need to make sure they > can handle the fact that they'll be initted later now. > > Changes in v2: > - Renamed to i2c-arbitrator-cros-ec. > - Documented "microsecond" properties as optional; removed > "bus-arbitration" prefix since it was just extra wordy. > - Split GPIOs into two properties to make it cleaner. > - Capitalized I2C in freeform text. > - Get 'active low' from device tree. > > .../bindings/i2c/i2c-arbitrator-cros-ec.txt | 76 +++++++ > drivers/i2c/muxes/Kconfig | 11 + > drivers/i2c/muxes/Makefile | 2 + > drivers/i2c/muxes/i2c-arbitrator-cros-ec.c | 222 +++++++++++++++++++++ > 4 files changed, 311 insertions(+) > create mode 100644 Documentation/devicetree/bindings/i2c/i2c-arbitrator-cros-ec.txt > create mode 100644 drivers/i2c/muxes/i2c-arbitrator-cros-ec.c Is there anything you'd like done before landing this patch for 3.10? It's been reviewed by Stephen Warren (thanks Stephen!). From what I remember from Olof's talk at ELC it seems like the best thing would be to merge part 1 through i2c tree and then ask Olof to merge parts 2 and 3 (the dts bits) through the arm-soc tree. I believe you could also add a "Tested-by" from Naveen to patch #1. He sent a tested by for parts 2 and 3 so must have also tested part 1 (the other two don't function without it). Please let me know--I'm happy to spin with any changes needed. :) -Doug -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
