hwmon: (occ) Add soft minimum power cap attribute

Export the power caps data for the soft minimum power cap through hwmon.

OpenBMC-Staging-Count: 1
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20220215151022.7498-5-eajames@linux.ibm.com
Signed-off-by: Joel Stanley <joel@jms.id.au>

drivers/hwmon/occ/common.c

@@ -674,6 +674,9 @@ static ssize_t occ_show_caps_3(struct device *dev,
 	case 7:
 		val = caps->user_source;
 		break;
+	case 8:
+		val = get_unaligned_be16(&caps->soft_min) * 1000000ULL;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -835,12 +838,13 @@ static int occ_setup_sensor_attrs(struct occ *occ)
 	case 1:
 		num_attrs += (sensors->caps.num_sensors * 7);
 		break;
-	case 3:
-		show_caps = occ_show_caps_3;
-		fallthrough;
 	case 2:
 		num_attrs += (sensors->caps.num_sensors * 8);
 		break;
+	case 3:
+		show_caps = occ_show_caps_3;
+		num_attrs += (sensors->caps.num_sensors * 9);
+		break;
 	default:
 		sensors->caps.num_sensors = 0;
 	}
@@ -1047,6 +1051,15 @@ static int occ_setup_sensor_attrs(struct occ *occ)
 			attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
 						     show_caps, NULL, 7, 0);
 			attr++;
+
+			if (sensors->caps.version > 2) {
+				snprintf(attr->name, sizeof(attr->name),
+					 "power%d_cap_min_soft", s);
+				attr->sensor = OCC_INIT_ATTR(attr->name, 0444,
+							     show_caps, NULL,
+							     8, 0);
+				attr++;
+			}
 		}
 	}