diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 5b84cbee030b..4ed056b18d31 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -253,6 +253,22 @@ static void cpg_rzt2h_mstp_write(struct cpg_mssr_priv *priv, u16 offset, u32 val
 	writel(value, base + RZT2H_MSTPCR_OFFSET(offset));
 }
 
+static void cpg_rzt2h_mstp_delay(u32 idx, bool bit_valid)
+{
+	unsigned int mask = bit_valid ? GENMASK(31, 0) : GENMASK(31, 5);
+
+	if (idx == (MOD_CLK_PACK(1204) & mask)) {
+		/* LCDC needs 100 dummy reads, or 142us */
+		udelay(142);
+	} else if (idx == (MOD_CLK_PACK(605) & mask)) {
+		/* RTC needs 300 dummy reads, or 428us */
+		udelay(428);
+	} else {
+		/* default 7 dummy reads, or 10us */
+		udelay(10);
+	}
+}
+
 static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
 {
 	struct mstp_clock *clock = to_mstp_clock(hw);
@@ -312,7 +328,7 @@ static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
 		 * register, we simply add a delay after the read operation.
 		 */
 		cpg_rzt2h_mstp_read(priv, priv->control_regs[reg]);
-		udelay(10);
+		cpg_rzt2h_mstp_delay(clock->index, true);
 		return 0;
 	}
 
@@ -1142,7 +1158,7 @@ static int cpg_mssr_resume_noirq(struct device *dev)
 			cpg_rzt2h_mstp_write(priv, priv->control_regs[reg], newval);
 			/* See cpg_mstp_clock_endisable() on why this is necessary. */
 			cpg_rzt2h_mstp_read(priv, priv->control_regs[reg]);
-			udelay(10);
+			cpg_rzt2h_mstp_delay(reg * 32, false);
 			continue;
 		} else
 			writel(newval, priv->pub.base0 + priv->control_regs[reg]);