[platform]AS7712 udpate kernel driver for port LED

device/accton/x86_64-accton_as7712_32x-r0/plugins/led_control.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+#
+# led_control.py
+# 
+# Platform-specific LED control functionality for SONiC
+#
+
+try:
+    from sonic_led.led_control_base import LedControlBase
+except ImportError, e:
+    raise ImportError (str(e) + " - required module not found")
+
+
+class LedControl(LedControlBase):
+    """Platform specific LED control class"""
+
+    SONIC_PORT_NAME_PREFIX = "Ethernet"
+
+    LED_SYSFS_PATH = "/sys/bus/platform/devices/accton_as7712_32x_led/leds/accton_as7712_32x_led::port{0}_led{1}/brightness"
+
+    QSFP_START_IDX = 0
+    QSFP_END_IDX = 31
+
+    LED_COLOR_OFF = 0
+    LED_COLOR_GREEN = 16
+    LED_COLOR_YELLOW = 14
+
+    def _port_name_to_qsfp_index(self, port_name):
+        # Strip "Ethernet" off port name
+        if not port_name.startswith(self.SONIC_PORT_NAME_PREFIX):
+            return -1
+
+        sonic_port_num = int(port_name[len(self.SONIC_PORT_NAME_PREFIX):])
+
+        # SONiC port nums are 0-based and increment by 4
+        return ((sonic_port_num/4) + 0)
+
+    # Concrete implementation of port_link_state_change() method
+    def port_link_state_change(self, port, state):
+        qsfp_index = self._port_name_to_qsfp_index(port)
+
+        # Ignore invalid QSFP indices
+        if not (self.QSFP_START_IDX <= qsfp_index <= self.QSFP_END_IDX):
+            return
+        # Light all 4 lanes for non-breakout
+        led_sysfs_paths = [ self.LED_SYSFS_PATH.format(qsfp_index, 0), 
+        		self.LED_SYSFS_PATH.format(qsfp_index, 1),
+        		self.LED_SYSFS_PATH.format(qsfp_index, 2),
+        		self.LED_SYSFS_PATH.format(qsfp_index, 3) ]
+
+        for led_sysfs_path in led_sysfs_paths:
+            led_file = open(led_sysfs_path, "w")
+            if state == "up":
+                led_file.write("%d" % self.LED_COLOR_GREEN)
+            else:
+                led_file.write("%d" % self.LED_COLOR_OFF)
+
+            led_file.close()
+
+    # Constructor
+    def __init__(self):
+        # Initialize: Turn all front panel QSFP LEDs off
+        for qsfp_index in range(self.QSFP_START_IDX, self.QSFP_END_IDX + 1):
+            for lane in range(0, 4):
+                led_sysfs_path = self.LED_SYSFS_PATH.format(qsfp_index, lane)
+                with open(led_sysfs_path, 'w') as led_file:
+                    led_file.write("%d" % self.LED_COLOR_OFF)
+
+