gpio: Add imx gpio driver shim

Adds a shim layer around the imx gpio driver to adapt it to the Zephyr
gpio interface.

For now only the port 4 was tested.

Signed-off-by: Stanislav Poboril <[email protected]>

drivers/gpio/CMakeLists.txt

@@ -7,6 +7,7 @@ zephyr_sources_ifdef(CONFIG_GPIO_DW         gpio_dw.c)
 zephyr_sources_ifdef(CONFIG_GPIO_ESP32      gpio_esp32.c)
 zephyr_sources_ifdef(CONFIG_GPIO_FE310      gpio_fe310.c)
 zephyr_sources_ifdef(CONFIG_GPIO_GECKO      gpio_gecko.c)
+zephyr_sources_ifdef(CONFIG_GPIO_IMX        gpio_imx.c)
 zephyr_sources_ifdef(CONFIG_GPIO_MCUX       gpio_mcux.c)
 zephyr_sources_ifdef(CONFIG_GPIO_MCUX_IGPIO gpio_mcux_igpio.c)
 zephyr_sources_ifdef(CONFIG_GPIO_MCUX_LPC   gpio_mcux_lpc.c)

drivers/gpio/Kconfig.imx

@@ -0,0 +1,59 @@
+# Kconfig.imx - IMX GPIO configuration options
+#
+# Copyright (c) 2018, NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+menuconfig GPIO_IMX
+	bool "IMX GPIO driver"
+	depends on GPIO && HAS_IMX_GPIO
+	default n
+	help
+	  Enable the IMX GPIO driver.
+
+if GPIO_IMX
+
+config GPIO_IMX_PORT_1
+	bool "Port 1"
+	default n
+	help
+	  Enable Port 1.
+
+config GPIO_IMX_PORT_2
+	bool "Port 2"
+	default n
+	help
+	  Enable Port 2.
+
+config GPIO_IMX_PORT_3
+	bool "Port 3"
+	default n
+	help
+	  Enable Port 3.
+
+config GPIO_IMX_PORT_4
+	bool "Port 4"
+	default n
+	help
+	  Enable Port 4.
+
+config GPIO_IMX_PORT_5
+	bool "Port 5"
+	default n
+	help
+	  Enable Port 5.
+
+config GPIO_IMX_PORT_6
+	bool "Port 6"
+	default n
+	help
+	  Enable Port 6.
+
+config GPIO_IMX_PORT_7
+	bool "Port 7"
+	default n
+	help
+	  Enable Port 7.
+
+endif # GPIO_IMX