ARM: sunxi: dt: Use clocks property instead of clock-frequency for the UARTs

It will be especially useful when we will have the clock definitions in
the device tree.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Emilio López <emilio@elopez.com.ar>
Tested-by: Emilio López <emilio@elopez.com.ar>
ARM: sunxi: Rename uart nodes to serial

The other architecture use serial@address for their uart nodes, so
rename our uart dt nodes to be consistent

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
ARM: sunxi: dt: Move uart0 to sun4i-a10.dtsi

The UART0 is only available on the Allwinner A10 SoCs, and not on the
A13, so move the uart0 node to sun4i-a10.dtsi.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Emilio López <emilio@elopez.com.ar>
Tested-by: Emilio López <emilio@elopez.com.ar>
ARM: sunxi: dt: Add uart3 dt node

Both A10 and A13 Allwinner SoCs have a Synopsys APB uart3 device
available, so add it to the sunxi.dtsi file

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Emilio López <emilio@elopez.com.ar>
ARM: sunxi: dt: Add A10 UARTs to the dtsi.

The Allwinner A10 SoC has 8 available UARTs, which is 6 more than on the
A13, so add the missing UARTs to the sun4i-a10 dtsi.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Emilio López <emilio@elopez.com.ar>
ARM: sunxi: hackberry: Add UART muxing

We previously relied on the bootloader to do the muxing of the UART for
the Hackberry. Don't rely on it anymore and use pinctrl.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Emilio López <emilio@elopez.com.ar>
ARM: sunxi: cubieboard: Add UART muxing

We previously relied on the bootloader to do the muxing of the UART for
the Cubieboard. Don't rely on it anymore and use pinctrl.

Also remove uart1, as it is not enabled by default and it's not exposed
on the board headers.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
arm: sunxi: Add clock definitions for AXI, AHB, APB0, APB1 gates

This commit adds the corresponding DT bindings for all the AXI,
AHB, APB0 and APB1 gates.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
arm: sunxi: use the right clock phandles for UARTs

All the UARTs are connected to clock gates; now that our clock driver
is able to handle them, make the switch.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
arm: sunxi: Add clock to pinctrl node

The port controller needs the apb0_pio clock enabled to be able to
work. This commit declares that on the device tree.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>