diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 23395fc5b267..0dd306d2c7f1 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -322,6 +322,7 @@ static irqreturn_t xadc_zynq_interrupt_handler(int irq, void *devid)
 
 #define XADC_ZYNQ_TCK_RATE_MAX 50000000
 #define XADC_ZYNQ_IGAP_DEFAULT 20
+#define XADC_ZYNQ_PCAP_RATE_MAX 200000000
 
 static int xadc_zynq_setup(struct platform_device *pdev,
 	struct iio_dev *indio_dev, int irq)
@@ -332,6 +333,7 @@ static int xadc_zynq_setup(struct platform_device *pdev,
 	unsigned int div;
 	unsigned int igap;
 	unsigned int tck_rate;
+	int ret;
 
 	/* TODO: Figure out how to make igap and tck_rate configurable */
 	igap = XADC_ZYNQ_IGAP_DEFAULT;
@@ -343,6 +345,13 @@ static int xadc_zynq_setup(struct platform_device *pdev,
 	if (!pcap_rate)
 		return -EINVAL;
 
+	if (pcap_rate > XADC_ZYNQ_PCAP_RATE_MAX) {
+		ret = clk_set_rate(xadc->clk,
+				   (unsigned long)XADC_ZYNQ_PCAP_RATE_MAX);
+		if (ret)
+			return ret;
+	}
+
 	if (tck_rate > pcap_rate / 2) {
 		div = 2;
 	} else {
@@ -368,6 +377,12 @@ static int xadc_zynq_setup(struct platform_device *pdev,
 			XADC_ZYNQ_CFG_REDGE | XADC_ZYNQ_CFG_WEDGE |
 			tck_div | XADC_ZYNQ_CFG_IGAP(igap));
 
+	if (pcap_rate > XADC_ZYNQ_PCAP_RATE_MAX) {
+		ret = clk_set_rate(xadc->clk, pcap_rate);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }