diff --git a/drivers/clk/clk-renesas-pcie.c b/drivers/clk/clk-renesas-pcie.c
index e6247141d0c0..3e98a16eba6b 100644
--- a/drivers/clk/clk-renesas-pcie.c
+++ b/drivers/clk/clk-renesas-pcie.c
@@ -144,8 +144,9 @@ static int rs9_regmap_i2c_read(void *context,
 static const struct regmap_config rs9_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
-	.cache_type = REGCACHE_NONE,
+	.cache_type = REGCACHE_FLAT,
 	.max_register = RS9_REG_BCP,
+	.num_reg_defaults_raw = 0x8,
 	.rd_table = &rs9_readable_table,
 	.wr_table = &rs9_writeable_table,
 	.reg_write = rs9_regmap_i2c_write,