diff --git a/drivers/ide/legacy/qd65xx.c b/drivers/ide/legacy/qd65xx.c
index 61d5889..5621963 100644
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -114,17 +114,18 @@
 
 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
 {
-	u8 active_cycle,recovery_cycle;
+	int clk = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
+	u8 act_cyc, rec_cyc;
 
-	if (system_bus_clock()<=33) {
-		active_cycle =   9  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 9);
-		recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
+	if (clk <= 33) {
+		act_cyc =  9 - IDE_IN(active_time   * clk / 1000 + 1, 2,  9);
+		rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
 	} else {
-		active_cycle =   8  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 1, 8);
-		recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
+		act_cyc =  8 - IDE_IN(active_time   * clk / 1000 + 1, 1,  8);
+		rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
 	}
 
-	return((recovery_cycle<<4) | 0x08 | active_cycle);
+	return (rec_cyc << 4) | 0x08 | act_cyc;
 }
 
 /*
@@ -135,10 +136,13 @@
 
 static u8 qd6580_compute_timing (int active_time, int recovery_time)
 {
-	u8 active_cycle   = 17 - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 17);
-	u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
+	int clk = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
+	u8 act_cyc, rec_cyc;
 
-	return((recovery_cycle<<4) | active_cycle);
+	act_cyc = 17 - IDE_IN(active_time   * clk / 1000 + 1, 2, 17);
+	rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
+
+	return (rec_cyc << 4) | act_cyc;
 }
 
 /*