ARM: pinctrl: Add Broadcom Capri pinctrl driver

Adds pinctrl driver for Broadcom Capri (BCM281xx) SoCs.

v4: - PINCTRL selected in Kconfig, PINCTRL_CAPRI selected in bcm_defconfig
    - make use of regmap
    - change CAPRI_PIN_UPDATE from macro to inline function.
    - Handle pull-up strength arg in Ohm instead of enum
v3: Re-work driver to be based on generic pin config. Moved config selection
    from Kconfig to bcm_defconfig.
v2: Use hyphens instead of underscore in DT property names.

Signed-off-by: Sherman Yin <syin@broadcom.com>
Reviewed-by: Christian Daudt <bcm@fixthebug.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/configs/bcm_defconfig

@@ -126,3 +126,4 @@ CONFIG_CRC_ITU_T=y
 CONFIG_CRC7=y
 CONFIG_XZ_DEC=y
 CONFIG_AVERAGE=y
+CONFIG_PINCTRL_CAPRI=y

arch/arm/mach-bcm/Kconfig

@@ -25,6 +25,7 @@ config ARCH_BCM_MOBILE
 	select TICK_ONESHOT
 	select CACHE_L2X0
 	select HAVE_ARM_ARCH_TIMER
+	select PINCTRL
 	help
 	  This enables support for systems based on Broadcom mobile SoCs.
 	  It currently supports the 'BCM281XX' family, which includes

drivers/pinctrl/Kconfig

@@ -104,6 +104,18 @@ config PINCTRL_BCM2835
 	select PINMUX
 	select PINCONF
 
+config PINCTRL_CAPRI
+	bool "Broadcom Capri pinctrl driver"
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select REGMAP_MMIO
+	help
+	  Say Y here to support Broadcom Capri pinctrl driver, which is used for
+	  the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
+	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
+	  framework.  GPIO is provided by a separate GPIO driver.
+
 config PINCTRL_IMX
 	bool
 	select PINMUX

drivers/pinctrl/Makefile

@@ -21,6 +21,7 @@ obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
 obj-$(CONFIG_PINCTRL_BAYTRAIL)	+= pinctrl-baytrail.o
+obj-$(CONFIG_PINCTRL_CAPRI)	+= pinctrl-capri.o
 obj-$(CONFIG_PINCTRL_IMX)	+= pinctrl-imx.o
 obj-$(CONFIG_PINCTRL_IMX1_CORE)	+= pinctrl-imx1-core.o
 obj-$(CONFIG_PINCTRL_IMX27)	+= pinctrl-imx27.o