pinctrl: berlin: add the BG2Q pinctrl driver

Add the pin-controller driver for the Berlin BG2Q SoC, with definition
of its groups and functions. Pin control registers are part of chip/
system control registers, which will be represented by a single node.
Until a proper driver for the chip/system control is available,
register the corresponding regmap in pinctrl driver probe.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/berlin/Kconfig

@@ -5,4 +5,8 @@ config PINCTRL_BERLIN
 	select PINMUX
 	select REGMAP_MMIO
 
+config PINCTRL_BERLIN_BG2Q
+	bool
+	select PINCTRL_BERLIN
+
 endif

drivers/pinctrl/berlin/Makefile

 obj-$(CONFIG_PINCTRL_BERLIN)		+= berlin.o
+obj-$(CONFIG_PINCTRL_BERLIN_BG2Q)	+= berlin-bg2q.o