Eric Lee / smarc-fsl-linux-kernel

08 Mar, 2010

1 commit

  • 6048a3dd2   mfd: Add HTCPLD driver ... Browse Code ยป

    This change introduces a driver for the HTC PLD chip found
    on some smartphones, such as the HTC Wizard and HTC Herald.
    It works through the I2C bus and acts as a GPIO extender.
    Specifically:

    * it can have several sub-devices, each with its own I2C
    address
    * Each sub-device provides 8 output and 8 input pins
    * The chip attaches to one GPIO to signal when any of the
    input GPIOs change -- at which point all chips must be
    scanned for changes

    This driver implements the GPIOs throught the kernel's
    GPIO and IRQ framework. This allows any GPIO-servicing
    drivers to operate on htcpld pins, such as the gpio-keys
    and gpio-leds drivers.

    Signed-off-by: Cory Maccarrone
    Signed-off-by: Samuel Ortiz

    Cory Maccarrone