Adding 800G-ZR codes and ability to check 150GHz grid spacing (#601)

* Adding 800G-ZR codes and ability to check 150GHz grid spacing

* Add test case for 150 GHz grid

Author: aditya-nexthop

sonic_platform_base/sonic_xcvr/api/public/c_cmis.py

@@ -96,7 +96,9 @@ def get_freq_grid(self):
         This function returns the configured frequency grid. Unit in GHz
         '''
         freq_grid = self.xcvr_eeprom.read(consts.GRID_SPACING)
-        if freq_grid == 7:
+        if freq_grid == 8:
+            return 150
+        elif freq_grid == 7:
             return 75
         elif freq_grid == 6:
             return 33

sonic_platform_base/sonic_xcvr/codes/public/sff8024.py

@@ -398,6 +398,9 @@ class Sff8024(XcvrCodes):
         85: '400GBASE-DR4-2 (placeholder)',
         86: '800GBASE-DR8 (placeholder)',
         87: '800GBASE-DR8-2 (placeholder)',
+        108: '800ZR-A (0x01) 150 GHz DWDM',
+        109: '800ZR-B (0x02) 150 GHz DWDM',
+        110: '800ZR-C (0x03) 150 GHz DWDM',
         115: '200GBASE-DR1 (Clause 180)',
         116: '200GBASE-DR1-2 (Clause 181)',
         117: '400GBASE-DR2 (Clause 180)',

tests/sonic_xcvr/test_ccmis.py

@@ -23,6 +23,7 @@ class TestCCmis(object):
     api = CCmisApi(eeprom, cdb)
 
     @pytest.mark.parametrize("mock_response, expected", [
+        (8, 150),
         (7, 75),
         (6, 33),
         (5, 100),