diff --git a/drivers/misc/cs40l20.c b/drivers/misc/cs40l20.c
index 749c6a7b58d9..5792abd6e6df 100644
--- a/drivers/misc/cs40l20.c
+++ b/drivers/misc/cs40l20.c
@@ -319,6 +319,53 @@ static ssize_t cs40l20_redc_measured_show(struct device *dev,
 	return snprintf(buf, PAGE_SIZE, "%d\n", redc_measured);
 }
 
+static ssize_t cs40l20_redc_stored_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	struct cs40l20_private *cs40l20 = cs40l20_get_private(dev);
+	int ret;
+	unsigned int val;
+
+	mutex_lock(&cs40l20->lock);
+	ret = regmap_read(cs40l20->regmap,
+			cs40l20_dsp_reg(cs40l20, "REDC_STORED",
+				CS40L20_XM_UNPACKED_TYPE), &val);
+	mutex_unlock(&cs40l20->lock);
+
+	if (ret) {
+		pr_err("Failed to read stored ReDC\n");
+		return ret;
+	}
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t cs40l20_redc_stored_store(struct device *dev,
+			struct device_attribute *attr,
+			const char *buf, size_t count)
+{
+	struct cs40l20_private *cs40l20 = cs40l20_get_private(dev);
+	int ret;
+	unsigned int val;
+
+	ret = kstrtou32(buf, 10, &val);
+	if (ret)
+		return -EINVAL;
+
+	mutex_lock(&cs40l20->lock);
+	ret = regmap_write(cs40l20->regmap,
+			cs40l20_dsp_reg(cs40l20, "REDC_STORED",
+				CS40L20_XM_UNPACKED_TYPE), val);
+	mutex_unlock(&cs40l20->lock);
+
+	if (ret) {
+		pr_err("Failed to store ReDC\n");
+		return ret;
+	}
+
+	return count;
+}
+
 static ssize_t cs40l20_dig_scale_show(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
@@ -369,6 +416,8 @@ static DEVICE_ATTR(f0_measured, 0660, cs40l20_f0_measured_show, NULL);
 static DEVICE_ATTR(f0_stored, 0660, cs40l20_f0_stored_show,
 		cs40l20_f0_stored_store);
 static DEVICE_ATTR(redc_measured, 0660, cs40l20_redc_measured_show, NULL);
+static DEVICE_ATTR(redc_stored, 0660, cs40l20_redc_stored_show,
+		cs40l20_redc_stored_store);
 static DEVICE_ATTR(dig_scale, 0660, cs40l20_dig_scale_show,
 		cs40l20_dig_scale_store);
 
@@ -379,6 +428,7 @@ static struct attribute *cs40l20_dev_attrs[] = {
 	&dev_attr_f0_measured.attr,
 	&dev_attr_f0_stored.attr,
 	&dev_attr_redc_measured.attr,
+	&dev_attr_redc_stored.attr,
 	&dev_attr_dig_scale.attr,
 	NULL,
 };
diff --git a/drivers/misc/cs40l20.h b/drivers/misc/cs40l20.h
index c16078766aea..14de2740857d 100644
--- a/drivers/misc/cs40l20.h
+++ b/drivers/misc/cs40l20.h
@@ -697,7 +697,7 @@
 #define CS40L20_XM_LIST_TERM		0xBEDEAD
 
 #define CS40L20_NUM_ALGOS_MAX		16
-#define CS40L20_FW_REV_MIN		0x000205
+#define CS40L20_FW_REV_MIN		0x000300
 
 #define CS40L20_ALGO_ID_SIZE		4
 #define CS40L20_COEFF_COUNT_SIZE	4