diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c
index ad5c403b0c67..883c167c0670 100644
--- a/drivers/iio/adc/rzg2l_adc.c
+++ b/drivers/iio/adc/rzg2l_adc.c
@@ -504,7 +504,16 @@ static const struct rzg2l_adc_hw_params rzg2l_hw_params = {
 	.adivc = true
 };
 
+static const struct rzg2l_adc_hw_params rzg3s_hw_params = {
+	.num_channels = 9,
+	.default_adcmp = 0x1d,
+	.default_adsmp = { 0x7f, 0xff },
+	.adsmp_mask = GENMASK(7, 0),
+	.adint_inten_mask = GENMASK(11, 0),
+};
+
 static const struct of_device_id rzg2l_adc_match[] = {
+	{ .compatible = "renesas,r9a08g045-adc", .data = &rzg3s_hw_params },
 	{ .compatible = "renesas,rzg2l-adc", .data = &rzg2l_hw_params },
 	{ /* sentinel */ }
 };