* Marvell Dove SoC pinctrl driver for mpp

Please refer to marvell,mvebu-pinctrl.txt in this directory for common binding
part and usage.

Required properties:
- compatible: "marvell,dove-pinctrl"
- clocks: (optional) phandle of pdma clock
- reg: register specifiers of MPP, MPP4, and PMU MPP registers

Available mpp pins/groups and functions:
Note: brackets (x) are not part of the mpp name for marvell,function and given
only for more detailed description in this document.
Note: pmu* also allows for Power Management functions listed below

name          pins     functions
================================================================================
mpp0          0        gpio, pmu, uart2(rts), sdio0(cd), lcd0(pwm), pmu*
mpp1          1        gpio, pmu, uart2(cts), sdio0(wp), lcd1(pwm), pmu*
mpp2          2        gpio, pmu, uart2(txd), sdio0(buspwr), sata(prsnt),
                       uart1(rts), pmu*
mpp3          3        gpio, pmu, uart2(rxd), sdio0(ledctrl), sata(act),
                       uart1(cts), lcd-spi(cs1), pmu*
mpp4          4        gpio, pmu, uart3(rts), sdio1(cd), spi1(miso), pmu*
mpp5          5        gpio, pmu, uart3(cts), sdio1(wp), spi1(cs), pmu*
mpp6          6        gpio, pmu, uart3(txd), sdio1(buspwr), spi1(mosi), pmu*
mpp7          7        gpio, pmu, uart3(rxd), sdio1(ledctrl), spi1(sck), pmu*
mpp8          8        gpio, pmu, watchdog(rstout), pmu*
mpp9          9        gpio, pmu, pex1(clkreq), pmu*
mpp10         10       gpio, pmu, ssp(sclk), pmu*
mpp11         11       gpio, pmu, sata(prsnt), sata-1(act), sdio0(ledctrl),
                       sdio1(ledctrl), pex0(clkreq), pmu*
mpp12         12       gpio, pmu, uart2(rts), audio0(extclk), sdio1(cd),
                       sata(act), pmu*
mpp13         13       gpio, pmu, uart2(cts), audio1(extclk), sdio1(wp),
                       ssp(extclk), pmu*
mpp14         14       gpio, pmu, uart2(txd), sdio1(buspwr), ssp(rxd), pmu*
mpp15         15       gpio, pmu, uart2(rxd), sdio1(ledctrl), ssp(sfrm), pmu*
mpp16         16       gpio, uart3(rts), sdio0(cd), ac97(sdi1), lcd-spi(cs1)
mpp17         17       gpio, uart3(cts), sdio0(wp), ac97(sdi2), twsi(sda),
                       ac97-1(sysclko)
mpp18         18       gpio, uart3(txd), sdio0(buspwr), ac97(sdi3), lcd0(pwm)
mpp19         19       gpio, uart3(rxd), sdio0(ledctrl), twsi(sck)
mpp20         20       gpio, sdio0(cd), sdio1(cd), spi1(miso), lcd-spi(miso),
                       ac97(sysclko)
mpp21         21       gpio, sdio0(wp), sdio1(wp), spi1(cs), lcd-spi(cs0),
                       uart1(cts), ssp(sfrm)
mpp22         22       gpio, sdio0(buspwr), sdio1(buspwr), spi1(mosi),
                       lcd-spi(mosi), uart1(cts), ssp(txd)
mpp23         23       gpio, sdio0(ledctrl), sdio1(ledctrl), spi1(sck),
                       lcd-spi(sck), ssp(sclk)
mpp_camera    24-39    gpio, camera
mpp_sdio0     40-45    gpio, sdio0
mpp_sdio1     46-51    gpio, sdio1
mpp_audio1    52-57    gpio, i2s1/spdifo, i2s1, spdifo, twsi, ssp/spdifo, ssp,
                       ssp/twsi
mpp_spi0      58-61    gpio, spi0
mpp_uart1     62-63    gpio, uart1
mpp_nand      64-71    gpo, nand
audio0        -        i2s, ac97
twsi          -        none, opt1, opt2, opt3

Power Management functions (pmu*):
pmu-nc               Pin not driven by any PM function
pmu-low              Pin driven low (0)
pmu-high             Pin driven high (1)
pmic(sdi)            Pin is used for PMIC SDI
cpu-pwr-down         Pin is used for CPU_PWRDWN
standby-pwr-down     Pin is used for STBY_PWRDWN
core-pwr-good        Pin is used for CORE_PWR_GOOD (Pins 0-7 only)
cpu-pwr-good         Pin is used for CPU_PWR_GOOD (Pins 8-15 only)
bat-fault            Pin is used for BATTERY_FAULT
ext0-wakeup          Pin is used for EXT0_WU
ext1-wakeup          Pin is used for EXT0_WU
ext2-wakeup          Pin is used for EXT0_WU
pmu-blink            Pin is used for blink function

Notes:
* group "mpp_audio1" allows the following functions and gpio pins:
  - gpio          : gpio on pins 52-57
  - i2s1/spdifo   : audio1 i2s on pins 52-55 and spdifo on 57, no gpios
  - i2s1          : audio1 i2s on pins 52-55, gpio on pins 56,57
  - spdifo        : spdifo on pin 57, gpio on pins 52-55
  - twsi          : twsi on pins 56,57, gpio on pins 52-55
  - ssp/spdifo    : ssp on pins 52-55, spdifo on pin 57, no gpios
  - ssp           : ssp on pins 52-55, gpio on pins 56,57
  - ssp/twsi      : ssp on pins 52-55, twsi on pins 56,57, no gpios
* group "audio0" internally muxes i2s0 or ac97 controller to the dedicated
  audio0 pins.
* group "twsi" internally muxes twsi controller to the dedicated or option pins.