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* 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

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.

name          pins     functions
================================================================================
mpp0          0        gpio, pmu, uart2(rts), sdio0(cd), lcd0(pwm)
mpp1          1        gpio, pmu, uart2(cts), sdio0(wp), lcd1(pwm)
mpp2          2        gpio, pmu, uart2(txd), sdio0(buspwr), sata(prsnt),
                       uart1(rts)
mpp3          3        gpio, pmu, uart2(rxd), sdio0(ledctrl), sata(act),
                       uart1(cts), lcd-spi(cs1)
mpp4          4        gpio, pmu, uart3(rts), sdio1(cd), spi1(miso)
mpp5          5        gpio, pmu, uart3(cts), sdio1(wp), spi1(cs)
mpp6          6        gpio, pmu, uart3(txd), sdio1(buspwr), spi1(mosi)
mpp7          7        gpio, pmu, uart3(rxd), sdio1(ledctrl), spi1(sck)
mpp8          8        gpio, pmu, watchdog(rstout)
mpp9          9        gpio, pmu, pex1(clkreq)
mpp10         10       gpio, pmu, ssp(sclk)
mpp11         11       gpio, pmu, sata(prsnt), sata-1(act), sdio0(ledctrl),
                       sdio1(ledctrl), pex0(clkreq)
mpp12         12       gpio, pmu, uart2(rts), audio0(extclk), sdio1(cd), sata(act)
mpp13         13       gpio, pmu, uart2(cts), audio1(extclk), sdio1(wp),
                       ssp(extclk)
mpp14         14       gpio, pmu, uart2(txd), sdio1(buspwr), ssp(rxd)
mpp15         15       gpio, pmu, uart2(rxd), sdio1(ledctrl), ssp(sfrm)
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

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.