[Delta]: Add psuutil support for ag9032v1 (#1298)

Fix the bug of psu module for ag9032v1

Signed-off-by: neal <neal.tai@deltaww.com>

device/delta/x86_64-delta_ag9032v1-r0/plugins/psuutil.py

@@ -0,0 +1,57 @@
+import os.path
+
+try:
+    from sonic_psu.psu_base import PsuBase
+except ImportError as e:
+    raise ImportError (str(e) + "- required module not found")
+
+class PsuUtil(PsuBase):
+    """Platform-specific PSUutil class"""
+
+    def __init__(self):
+        PsuBase.__init__(self)
+
+        self.psu_path = "/sys/bus/i2c/devices/{}-0058/"
+        self.psu_oper_status = "in1_input"
+        self.psu_presence = "i2cget -y {} 0x50 0x00"
+
+
+    def get_num_psus(self):
+        """
+        Retrieves the number of PSUs available on the device
+
+        :return: An integer, the number of PSUs available on the device
+        """
+        return 2
+
+    def get_psu_status(self, index):
+        if index is None:
+            return False
+        Base_bus_number = 39
+        status = 0
+        #index from 1, psu attribute bus from 40
+        try:
+            with open(self.psu_path.format(index + Base_bus_number) + self.psu_oper_status, 'r') as power_status:
+                if int(power_status.read()) == 0 :
+                    return False
+                else:
+                    status = 1
+        except IOError:
+            return False
+        return status == 1
+
+    def get_psu_presence(self, index):
+        if index is None:
+            return False
+        Base_bus_number = 39
+        status = 0
+        try:
+            p = os.popen(self.psu_presence.format(index + Base_bus_number)+ "> /dev/null 2>&1")
+            if p.readline() != None:
+                status = 1
+            p.close()
+        except IOError:
+            return False
+        return status == 1
+
+

platform/broadcom/sonic-platform-modules-delta/ag9032v1/modules/dni_ag9032v1_psu.c

@@ -2,9 +2,9 @@
  * An hwmon driver for delta AG9032v1 PSU
  * dps_800ab_16_d.c - Support for DPS-800AB-16 D Power Supply Module
  *
- * Copyright (C) 2017 Delta Networks, Inc.
+ * Copyright (C) 2016 Delta Network Technology Corporation
  *
- * Aries Lin <aries.lin@deltaww.com>
+ * DNI <DNIsales@delta.com.tw>
  *
  * Based on ym2651y.c
  * Based on ad7414.c
@@ -361,6 +361,7 @@ static struct dps_800ab_16_d_data *dps_800ab_16_d_update_device( \
 			if (status < 0) {
 				dev_dbg(&client->dev, "reg %d, err %d\n",
 					regs_byte[i].reg, status);
+				*(regs_byte[i].value) = 0;
 			} else {
 				*(regs_byte[i].value) = status;
 			}
@@ -372,28 +373,31 @@ static struct dps_800ab_16_d_data *dps_800ab_16_d_update_device( \
 			if (status < 0) {
 				dev_dbg(&client->dev, "reg %d, err %d\n",
 					regs_word[i].reg, status);
+				*(regs_word[i].value) = 0;
 			} else {
 				*(regs_word[i].value) = status;
 			}
 		}
 
 		command = 0x9a;		/* PSU mfr_model */
+		//data->mfr_model[1] = '\0';
 		status = dps_800ab_16_d_read_block(client, command, 
-			data->mfr_model, ARRAY_SIZE(data->mfr_model) - 1);
-        	data->mfr_model[ARRAY_SIZE(data->mfr_model) - 1] = '\0';
-        	if (status < 0) {
-                	dev_dbg(&client->dev, "reg %d, err %d\n", command, 
-								status);
-        	}
-
-        	command = 0x9e;		/* PSU mfr_serial */
-        	status = dps_800ab_16_d_read_block(client, command, 
-			data->mfr_serial, ARRAY_SIZE(data->mfr_serial) - 1);
-        	data->mfr_serial[ARRAY_SIZE(data->mfr_serial) - 1] = '\0';
-        	if (status < 0) {
-                	dev_dbg(&client->dev, "reg %d, err %d\n", command, 
-								status);
-       		}	
+		data->mfr_model, ARRAY_SIZE(data->mfr_model) - 1);
+    	data->mfr_model[ARRAY_SIZE(data->mfr_model) - 1] = '\0';
+    	if (status < 0) {
+        	dev_dbg(&client->dev, "reg %d, err %d\n", command,status);
+        	data->mfr_model[1] = '\0';
+    	}
+
+    	command = 0x9e;		/* PSU mfr_serial */
+    	//data->mfr_serial[1] = '\0';
+    	status = dps_800ab_16_d_read_block(client, command, 
+		data->mfr_serial, ARRAY_SIZE(data->mfr_serial) - 1);
+    	data->mfr_serial[ARRAY_SIZE(data->mfr_serial) - 1] = '\0';
+    	if (status < 0) {
+            dev_dbg(&client->dev, "reg %d, err %d\n", command,status);
+            data->mfr_serial[1] = '\0';
+   		}	
 
 		data->valid = 1;
 	}