dt-binding: ARM: add clock binding docs for Marvell Berlin2 SoCs

This adds mandatory device tree binding documentation for the clock related
IP found on Marvell Berlin2 (BG2, BG2CD, and BG2Q) SoCs to the Berlin SoC
binding documentation.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
clk: berlin: add binding include for Berlin SoC clock ids

This adds a dt-binding include for Marvell Berlin BG2/BG2CD and BG2Q
core clock IDs.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
ARM: dts: berlin: convert BG2CD to DT clock nodes

This converts Berlin BG2CD SoC dtsi to make use of the new DT clock
nodes for Berlin SoCs. Also add a binding include to ease core clock
references.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
ARM: dts: berlin: convert BG2 to DT clock nodes

This converts Berlin BG2 SoC dtsi to make use of the new DT clock
nodes for Berlin SoCs. While at it, also fix up twdclk which is
running at cpuclk/3 instead of sysclk.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
ARM: dts: berlin: convert BG2Q to DT clock nodes

This converts Berlin BG2Q SoC dtsi to make use of the new DT clock
nodes for Berlin SoCs.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
dt-binding: ARM: add pinctrl binding docs for Marvell Berlin2 SoCs

Add pin control binding documentation to the SoC binding documentaion
as pinctrl is part of chip/system control registers. The documentation
also explains how to configure this group based controller.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
ARM: dts: berlin: add the pinctrl node and muxing setup for uarts

Add pinctrl bindings and system control nodes to what we currently know
about Berlin SoCs. Where available, also set default pinctrl property
for uarts, when there is only one pinmux option for it.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>