diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 735c501e7a06c2..bb93d8bcfd0844 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -18,6 +18,7 @@
 #include <linux/pm.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
+#include <linux/string_helpers.h>
 
 /* Since we request GPIOs from ourself */
 #include <linux/pinctrl/consumer.h>
@@ -1371,6 +1372,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 
 static int at91_pinctrl_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct at91_pinctrl *info;
 	struct pinctrl_pin_desc *pdesc;
 	int ret, i, j, k;
@@ -1394,9 +1396,19 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	for (i = 0, k = 0; i < gpio_banks; i++) {
+		char **pin_names;
+
+		pin_names = devm_kasprintf_strarray(dev, "pio", MAX_NB_GPIO_PER_BANK);
+		if (!names)
+			return -ENOMEM;
+
 		for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
+			char *pin_name = pin_names[j];
+
+			strreplace(pin_name, '-', i + 'A');
+
 			pdesc->number = k;
-			pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j);
+			pdesc->name = pin_name;
 			pdesc++;
 		}
 	}
@@ -1797,7 +1809,8 @@ static const struct of_device_id at91_gpio_of_match[] = {
 
 static int at91_gpio_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
 	struct at91_gpio_chip *at91_chip = NULL;
 	struct gpio_chip *chip;
 	struct pinctrl_gpio_range *range;
@@ -1866,16 +1879,14 @@ static int at91_gpio_probe(struct platform_device *pdev)
 			chip->ngpio = ngpio;
 	}
 
-	names = devm_kcalloc(&pdev->dev, chip->ngpio, sizeof(char *),
-			     GFP_KERNEL);
-
+	names = devm_kasprintf_strarray(dev, "pio", chip->ngpio);
 	if (!names) {
 		ret = -ENOMEM;
 		goto clk_enable_err;
 	}
 
 	for (i = 0; i < chip->ngpio; i++)
-		names[i] = devm_kasprintf(&pdev->dev, GFP_KERNEL, "pio%c%d", alias_idx + 'A', i);
+		strreplace('-', alias_idx + 'A');
 
 	chip->names = (const char *const *)names;