diff --git a/include/configs/sequoia.h b/include/configs/sequoia.h
index 1f19621..b7f79c2 100644
--- a/include/configs/sequoia.h
+++ b/include/configs/sequoia.h
@@ -38,7 +38,9 @@
 #define CONFIG_440GRX		1		/* Specific PPC440GRx	*/
 #endif
 #define CONFIG_4xx		1		/* ... PPC4xx family	*/
-#define CONFIG_SYS_CLK_FREQ	33000000	/* external freq to pll	*/
+/* Detect Sequoia PLL input clock automatically via CPLD bit		*/
+#define CONFIG_SYS_CLK_FREQ    ((in8(CFG_BCSR_BASE + 3) & 0x80) ? \
+				3333333 : 33000000)
 
 #define CONFIG_BOARD_EARLY_INIT_F 1		/* Call board_early_init_f */
 #define CONFIG_MISC_INIT_R	1		/* Call misc_init_r	*/