@@ -883,6 +883,18 @@ static const struct pinmux_ops zynq_pinmux_ops = {
 #define ZYNQ_PINCONF_SPEED	BIT(8)
 #define ZYNQ_PINCONF_PULLUP	BIT(12)
 
+#define ZYNQ_PINCONF_IOTYPE_SHIFT	9
+#define ZYNQ_PINCONF_IOTYPE_MASK	(7 << ZYNQ_PINCONF_IOTYPE_SHIFT)
+
+enum zynq_io_standards {
+	zynq_iostd_min,
+	zynq_iostd_lvcmos18,
+	zynq_iostd_lvcmos25,
+	zynq_iostd_lvcmos33,
+	zynq_iostd_hstl,
+	zynq_iostd_max
+};
+
 static int zynq_pinconf_cfg_get(struct pinctrl_dev *pctldev,
 				unsigned pin,
 				unsigned long *config)

@@ -918,6 +930,10 @@ static int zynq_pinconf_cfg_get(struct pinctrl_dev *pctldev,
 	case PIN_CONFIG_SLEW_RATE:
 		arg = !!(reg & ZYNQ_PINCONF_SPEED);
 		break;
+	case PIN_CONFIG_IOSTANDARD:
+		arg = reg & ZYNQ_PINCONF_IOTYPE_MASK;
+		arg >>= ZYNQ_PINCONF_IOTYPE_SHIFT;
+		break;
 	default:
 		return -ENOTSUPP;
 	}

@@ -969,6 +985,15 @@ static int zynq_pinconf_cfg_set(struct pinctrl_dev *pctldev,
 				reg &= ~ZYNQ_PINCONF_SPEED;
 
 			break;
+		case PIN_CONFIG_IOSTANDARD:
+			if (arg <= zynq_iostd_min || arg >= zynq_iostd_max) {
+				dev_warn(pctldev->dev,
+					 "unsupported IO standard '%u'\n",
+					 param);
+				break;
+			}
+			reg |= arg << ZYNQ_PINCONF_IOTYPE_SHIFT;
+			break;
 		default:
 			dev_warn(pctldev->dev,
 				 "unsupported configuration parameter '%u'\n",