boards: frdm_kl25z: add USB support

Add USB support to FRDM_KL25Z board.

Signed-off-by: Johann Fischer <j.fischer@phytec.de>

arch/arm/soc/nxp_kinetis/kl2x/Kconfig.defconfig.mkl25z4

@@ -64,4 +64,11 @@ config SOC_FLASH_MCUX
 
 endif # FLASH
 
+if USB
+
+config USB_KINETIS
+	def_bool y
+
+endif # USB
+
 endif # SOC_MKL25Z

arch/arm/soc/nxp_kinetis/kl2x/dts.fixup

@@ -21,4 +21,10 @@
 #define FLASH_DEV_BASE_ADDRESS			NXP_KINETIS_FTFA_40020000_BASE_ADDRESS
 #define FLASH_DEV_NAME				NXP_KINETIS_FTFA_40020000_LABEL
 
+#define CONFIG_USBD_KINETIS_NAME		NXP_KINETIS_USBD_40072000_LABEL
+#define CONFIG_USBD_KINETIS_IRQ			NXP_KINETIS_USBD_40072000_IRQ_USB_OTG
+#define CONFIG_USBD_KINETIS_IRQ_PRI		NXP_KINETIS_USBD_40072000_IRQ_USB_OTG_PRIORITY
+#define CONFIG_USBD_KINETIS_BASE_ADDRESS	NXP_KINETIS_USBD_40072000_BASE_ADDRESS
+#define CONFIG_USBD_KINETIS_NUM_BIDIR_EP	NXP_KINETIS_USBD_40072000_NUM_BIDIR_ENDPOINTS
+
 /* End of SoC Level DTS fixup file */

arch/arm/soc/nxp_kinetis/kl2x/soc.c

@@ -98,6 +98,10 @@ static ALWAYS_INLINE void clkInit(void)
 #ifdef CONFIG_UART_MCUX_LPSCI_0
 	CLOCK_SetLpsci0Clock(LPSCI0SRC_MCGFLLCLK);
 #endif
+#if CONFIG_USB_KINETIS
+	CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcPll0,
+				CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC);
+#endif
 }
 
 static int kl2x_init(struct device *arg)

arch/arm/soc/nxp_kinetis/kl2x/soc.h

@@ -17,6 +17,7 @@ extern "C" {
 
 #ifndef _ASMLANGUAGE
 
+#include <fsl_common.h>
 #include <device.h>
 #include <misc/util.h>
 #include <random/rand32.h>

boards/arm/frdm_kl25z/doc/frdm_kl25z.rst

@@ -61,6 +61,8 @@ The frdm_kl25z board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | FLASH     | on-chip    | soc flash                           |
 +-----------+------------+-------------------------------------+
+| USB       | on-chip    | USB device                          |
++-----------+------------+-------------------------------------+
 
 The default configuration can be found in the defconfig file:
 
@@ -106,6 +108,13 @@ Serial Port
 
 The KL25Z UART0 is used for the console.
 
+USB
+===
+
+The KL25Z SoC has a USB OTG (USBOTG) controller that supports both
+device and host functions through its mini USB connector (USB KL25Z).
+Only USB device function is supported in Zephyr at the moment.
+
 Programming and Debugging
 *************************
 

boards/arm/frdm_kl25z/frdm_kl25z.dts

@@ -70,3 +70,9 @@
 	status = "ok";
 	current-speed = <115200>;
 };
+
+&usbd {
+	compatible = "nxp,kinetis-usbd";
+	status = "ok";
+	num-bidir-endpoints = <8>;
+};

boards/arm/frdm_kl25z/frdm_kl25z.yaml

@@ -15,3 +15,4 @@ supported:
   - adc
   - i2c
   - gpio
+  - usb_device

dts/arm/nxp/nxp_kl25z.dtsi

@@ -137,6 +137,16 @@
 			gpio-controller;
 			#gpio-cells = <2>;
 		};
+
+		usbd: usbd@40072000 {
+			compatible = "nxp,kinetis-usbd";
+			reg = <0x40072000 0x1000>;
+			interrupts = <24 1>;
+			interrupt-names = "usb_otg";
+			num-bidir-endpoints = <16>;
+			status = "disabled";
+			label = "USBD";
+		};
 	};
 };