[Telink] Add the functionality for the TL7218X ML7-M board

- add the TL7218X ML7-M configuration and overlay files,
- support white and green LEDs,
- support Factory Reset and Lighting On/Off buttons,
- support USB-CDC.

build command:
west build -b tl7218x --  -DTLNK_7218X_ML7M_BOARD=y

Signed-off-by: Hao Wu <[email protected]>

Author: wuhaoTelink

examples/platform/telink/common.cmake

@@ -74,6 +74,15 @@ if(${TLNK_7218X_ML7G_BOARD} MATCHES y)
   if(NOT EXISTS "${ML_CONF_OVERLAY_FILE}")
     message(FATAL_ERROR "${ML_CONF_OVERLAY_FILE} doesn't exist")
   endif()
+elseif(${TLNK_7218X_ML7M_BOARD} MATCHES y)
+  set(ML_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}_ml7m.overlay")
+  if(NOT EXISTS "${ML_DTC_OVERLAY_FILE}")
+    message(FATAL_ERROR "${ML_DTC_OVERLAY_FILE} doesn't exist")
+  endif()
+  set(ML_CONF_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}_ml7m.conf")
+  if(NOT EXISTS "${ML_CONF_OVERLAY_FILE}")
+    message(FATAL_ERROR "${ML_CONF_OVERLAY_FILE} doesn't exist")
+  endif() 
 elseif(${TLNK_3218X_ML3M_BOARD} MATCHES y)
   set(ML_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}_ml3m.overlay")
   if(NOT EXISTS "${ML_DTC_OVERLAY_FILE}")

src/platform/telink/tl7218x_ml7m.conf

@@ -0,0 +1,9 @@
+CONFIG_CHIP_BUTTON_MANAGER_IRQ_MODE=y
+
+# Disable PWM because PE1~5 are used for PWM
+CONFIG_PWM=n
+
+# USB configuration (Disable it if need full logging)
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n
+CONFIG_USB_CDC_ACM_LOG_LEVEL_OFF=y

src/platform/telink/tl7218x_ml7m.overlay

@@ -0,0 +1,107 @@
+
+/ {
+	model = "telink,tl721x";
+	compatible = "telink,tl7218x";
+    
+	chosen {
+		zephyr,console = &cdc_acm_uart0;
+		zephyr,shell-uart = &cdc_acm_uart0;
+	};
+
+    aliases {
+        /delete-property/ mcuboot-button0;
+    };
+
+    leds {
+        compatible = "gpio-leds";
+
+		led_green: led_1 {
+            gpios = <&gpioe 2 GPIO_ACTIVE_HIGH>;
+            label = "LED Green";
+        };
+
+        led_white: led_2 {
+            gpios = <&gpioe 1 GPIO_ACTIVE_HIGH>;
+            label = "LED White";
+        };
+    };
+
+    keys {
+        compatible = "gpio-keys";
+
+        key_1: button_1 {
+            label = "User KEY1";
+            gpios = <&gpioe 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+        };
+
+        key_2: button_2 {
+            label = "User KEY2";
+            gpios = <&gpioe 5 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+        };
+    };
+
+	key_pool {
+		compatible = "gpio-keys";
+
+		inp {
+			gpios = <&gpioe 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+				<&gpioe 5 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+		};
+	};
+
+    led_pool {
+		compatible = "gpio-leds";
+
+		out {
+			gpios = <&gpioe 2 GPIO_ACTIVE_HIGH>,
+                    <&gpioe 1 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+    /delete-node/ pwm_pool;
+
+};
+
+
+&gpioe {
+	interrupts = <39 1>;
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&uart0_tx_pb6_default &uart0_rx_pb7_default>;
+	pinctrl-names = "default";
+};
+
+/* Disable LSPI in overlay */
+&lspi {
+    status = "disabled";
+};
+
+&pinctrl {
+	/* Set pad-mul-sel register value.
+	 * Note: Pins functions below (pinmux = <...>) depend on this value.
+	 */
+	pad-mul-sel = <1>;
+
+	/* UART0: TX(PB6), RX(PB7) */
+
+	uart0_tx_pb6_default: uart0_tx_pb6_default {
+		pinmux = <TLX_PINMUX_SET(TLX_PORT_B, TLX_PIN_6,
+			(TL721X_FUNC_UART0_TX | TL721X_PULL_UP))>;
+	};
+	uart0_rx_pb7_default: uart0_rx_pb7_default {
+		pinmux = <TLX_PINMUX_SET(TLX_PORT_B, TLX_PIN_7,
+			(TL721X_FUNC_UART0_RTX_IO | TL721X_PULL_UP))>;
+	};
+
+};
+
+/* USB configuration (Disable it if need full logging) */
+&zephyr_udc0 {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+	};
+};