pinctrl: add a pincontrol driver for BCM6328

Add a pincontrol driver for BCM6328. BCM6328 supports muxing 32 pins as
GPIOs, as LEDs for the integrated LED controller, or various other
functions. Its pincontrol mux registers also control other aspects, like
switching the second USB port between host and device mode.
Co-developed-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Link: https://lore.kernel.org/r/20210324081923.20379-8-noltari@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/bcm/Kconfig

@@ -36,6 +36,14 @@ config PINCTRL_BCM63XX
 	select PINCONF
 	select PINMUX
 
+config PINCTRL_BCM6328
+	bool "Broadcom BCM6328 GPIO driver"
+	depends on (BMIPS_GENERIC || COMPILE_TEST)
+	select PINCTRL_BCM63XX
+	default BMIPS_GENERIC
+	help
+	   Say Y here to enable the Broadcom BCM6328 GPIO driver.
+
 config PINCTRL_IPROC_GPIO
 	bool "Broadcom iProc GPIO (with PINCONF) driver"
 	depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)

drivers/pinctrl/bcm/Makefile

@@ -4,6 +4,7 @@
 obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
 obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
 obj-$(CONFIG_PINCTRL_BCM63XX)		+= pinctrl-bcm63xx.o
+obj-$(CONFIG_PINCTRL_BCM6328)		+= pinctrl-bcm6328.o
 obj-$(CONFIG_PINCTRL_IPROC_GPIO)	+= pinctrl-iproc-gpio.o
 obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
 obj-$(CONFIG_PINCTRL_NS)		+= pinctrl-ns.o