diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index d2656581a6085..4a446259a184e 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -189,11 +189,9 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
 				ret = regmap_write(map, reg, d->mask_buf[i]);
 			if (d->chip->clear_ack) {
 				if (d->chip->ack_invert && !ret)
-					ret = regmap_write(map, reg,
-							   d->mask_buf[i]);
+					ret = regmap_write(map, reg, UINT_MAX);
 				else if (!ret)
-					ret = regmap_write(map, reg,
-							   ~d->mask_buf[i]);
+					ret = regmap_write(map, reg, 0);
 			}
 			if (ret != 0)
 				dev_err(d->map->dev, "Failed to ack 0x%x: %d\n",
@@ -556,11 +554,9 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
 						data->status_buf[i]);
 			if (chip->clear_ack) {
 				if (chip->ack_invert && !ret)
-					ret = regmap_write(map, reg,
-							data->status_buf[i]);
+					ret = regmap_write(map, reg, UINT_MAX);
 				else if (!ret)
-					ret = regmap_write(map, reg,
-							~data->status_buf[i]);
+					ret = regmap_write(map, reg, 0);
 			}
 			if (ret != 0)
 				dev_err(map->dev, "Failed to ack 0x%x: %d\n",
@@ -817,13 +813,9 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode,
 					d->status_buf[i] & d->mask_buf[i]);
 			if (chip->clear_ack) {
 				if (chip->ack_invert && !ret)
-					ret = regmap_write(map, reg,
-						(d->status_buf[i] &
-						 d->mask_buf[i]));
+					ret = regmap_write(map, reg, UINT_MAX);
 				else if (!ret)
-					ret = regmap_write(map, reg,
-						~(d->status_buf[i] &
-						  d->mask_buf[i]));
+					ret = regmap_write(map, reg, 0);
 			}
 			if (ret != 0) {
 				dev_err(map->dev, "Failed to ack 0x%x: %d\n",