This patchset contains the initial I2C support for Broadcom iProc family of SoCs.
The iProc I2C controller has separate internal TX and RX FIFOs, each has a size of 64 bytes. The iProc I2C controller supports two bus speeds including standard mode (100 kHz) and fast mode (400 kHz) Changes from v5: - Improve the "waiting for transaction to be complete" logic to take care of the corner case when an interrupt fires after wait_for_completion_timeout times out - Improve the logic to disable I2C interrupt in the remove function. Make it more generic so it works for both dedicated and shared interrupt Changes from v4: - Remove redundant header file includes - Change the logic that waits for the host controller to be idle to simply return -EBUSY - Use proper print level and error codes in the driver - Allow zero length message in the driver to support I2C_SMBUS_QUICK - Change back to use devm_request_irq. Disable interrupt in the remove function so there's no outstanding I2C interrupt when the driver is being removed from the framework - Other minor miscellaneous improvements and fixes Changes from v3: - Add config dependency to COMPILE_TEST to allow the driver to be build tested by other platforms - Improve CPU utilization efficiency in the loop of waiting for bus to idle - Add more comment in the driver to clarify the way how the "start busy" interrupt is triggered from the I2C controller - Fix inconsistent coding style and format - Improve the bus speed validation logic in the driver - Add code to free the interrupt line in driver's remove function. Also change to use non-devm API to request the interrupt line - Other miscellaneous improvements and fixes Changes from v2: - Have the I2C driver default to y so it does not need to be selected from ARCH_BCM_IPROC. This also helps to get rid of one patch. The driver still depends on ARCH_BCM_IPROC - Get rid of redundant check on resource returned by platform_get_resource Changes from v1: - Fix function argument parenthesis - Get rid of redundant driver owner field Ray Jui (3): i2c: iProc: define Broadcom iProc I2C binding i2c: iproc: Add Broadcom iProc I2C Driver ARM: dts: add I2C device nodes for Broadcom Cygnus .../devicetree/bindings/i2c/brcm,iproc-i2c.txt | 37 ++ arch/arm/boot/dts/bcm-cygnus.dtsi | 20 + drivers/i2c/busses/Kconfig | 10 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-bcm-iproc.c | 499 ++++++++++++++++++++ 5 files changed, 567 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/brcm,iproc-i2c.txt create mode 100644 drivers/i2c/busses/i2c-bcm-iproc.c -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
