Patch merged into coreboot/master: nau8825: Add driver for I2C codec

the following patch was just integrated into master:
commit 7522dc3c072b9ef09363afd6a699cdb0564f9865
Author: Duncan Laurie 
Date:   Tue May 10 20:20:16 2016 -0700

nau8825: Add driver for I2C codec

The Nuvoton NAU8825 audio codec is an I2C device that has a number of
    tunable parameters that can be provided to the kernel device driver for
    basic configuration and optimal operation.

The configuration options are exposed to devicetree as registers and then
    presented as Device Properties via ACPI to the operation system.

This sample configuration in devicetree:

device pci 19.2 on
      chip drivers/i2c/nau8825
        register "irq" = "IRQ_LEVEL_LOW(GPP_F10_IRQ)"
        register "jkdet_enable" = "1"
        register "sar_threshold_num" = "2"
        register "sar_threshold[0]" = "0x0c"
        register "sar_threshold[1]" = "0x1c"
        device i2c 1a on end
      end
    end

Will generate the following code in the SSDT, trimmed for this commit
    message as there are more properties that can be configured:

Scope (_SB.PCI0.I2C4)
    {
      Name (_HID, "10508825")
      Name (_UID, Zero)
      Name (_DDN, "Nuvoton NAU8825 Codec")
      Method (_STA) { Return (0xF) }
      Name (_CRS, ResourceTemplate () {
        I2cSerialBus (0x1A, ControllerInitiated, 0x61A80, AddressingMode7Bit,
                      "_SB.PCI0.I2C4", 0, ResourceConsumer)
        Interrupt (ResourceConsumer, Level, ActiveLow) { 0x3A }
      })
      Name (_DSD, Package () {
        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bff4aa301"),
        Package () {
          Package () { "nuvoton,jkdet-enable", 1 },
          Package () { "nuvoton,sar-threshold-num", 2 },
          Package () { "nuvoton,sar-threshold", Package () { 0x0c, 0x1c } }
        }
      })
    }

Signed-off-by: Duncan Laurie 
    Change-Id: I480d72daf5ac3dded9b1cbb5fbc737b9dfde3834
    Reviewed-on: https://review.coreboot.org/15015
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/15015 for details.

-gerrit