diff --git a/arch/mips/mach-jz47xx/include/mach/jz4780.h b/arch/mips/mach-jz47xx/include/mach/jz4780.h
index 4422e50..880445d 100644
--- a/arch/mips/mach-jz47xx/include/mach/jz4780.h
+++ b/arch/mips/mach-jz47xx/include/mach/jz4780.h
@@ -60,7 +60,7 @@
 
 /* PLL setup */
 #define JZ4780_SYS_EXTAL	48000000
-#define JZ4780_SYS_MEM_SPEED	(CONFIG_SYS_MHZ * 1000000)
+#define JZ4780_SYS_MEM_SPEED	(1200 * 1000000)
 #define JZ4780_SYS_MEM_DIV	3
 #define JZ4780_SYS_AUDIO_SPEED	(768 * 1000000)
 
diff --git a/arch/mips/mach-jz47xx/jz4780/pll.c b/arch/mips/mach-jz47xx/jz4780/pll.c
index 323c634..4519b47 100644
--- a/arch/mips/mach-jz47xx/jz4780/pll.c
+++ b/arch/mips/mach-jz47xx/jz4780/pll.c
@@ -399,11 +399,7 @@
 			((2 - 1) << CPM_CPCCR_L2DIV_BIT) |
 			((1 - 1) << CPM_CPCCR_CDIV_BIT);
 
-	if (CONFIG_SYS_MHZ >= 1000)
-		clk_ctrl |= (12 - 1) << CPM_CPCCR_PDIV_BIT;
-	else
-		clk_ctrl |= (6 - 1) << CPM_CPCCR_PDIV_BIT;
-
+	clk_ctrl |= (12 - 1) << CPM_CPCCR_PDIV_BIT;
 	clrsetbits_le32(cpm_regs + CPM_CPCCR, 0x00ffffff, clk_ctrl);
 
 	while (readl(cpm_regs + CPM_CPCSR) & (CPM_CPCSR_CDIV_BUSY |
diff --git a/board/imgtec/ci20/ci20.c b/board/imgtec/ci20/ci20.c
index 7cbe49a..89f5e7a 100644
--- a/board/imgtec/ci20/ci20.c
+++ b/board/imgtec/ci20/ci20.c
@@ -350,10 +350,6 @@
 	.pulldn = 0x0e,
 };
 
-#if (CONFIG_SYS_MHZ != 1200)
-#error No DDR configuration for CPU speed
-#endif
-
 const struct jz4780_ddr_config *jz4780_get_ddr_config(void)
 {
 	const int board_revision = ci20_revision();
diff --git a/include/configs/ap121.h b/include/configs/ap121.h
index 099aac5..61cc073 100644
--- a/include/configs/ap121.h
+++ b/include/configs/ap121.h
@@ -6,8 +6,7 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define CONFIG_SYS_MHZ                  200
-#define CONFIG_SYS_MIPS_TIMER_FREQ      (CONFIG_SYS_MHZ * 1000000)
+#define CONFIG_SYS_MIPS_TIMER_FREQ      200000000
 
 #define CONFIG_SYS_SDRAM_BASE           0x80000000
 
diff --git a/include/configs/ap143.h b/include/configs/ap143.h
index 60b9e77..579b9b4 100644
--- a/include/configs/ap143.h
+++ b/include/configs/ap143.h
@@ -6,8 +6,7 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define CONFIG_SYS_MHZ                  325
-#define CONFIG_SYS_MIPS_TIMER_FREQ      (CONFIG_SYS_MHZ * 1000000)
+#define CONFIG_SYS_MIPS_TIMER_FREQ      325000000
 
 #define CONFIG_SYS_SDRAM_BASE           0x80000000
 
diff --git a/include/configs/ap152.h b/include/configs/ap152.h
index d165ead..283762f 100644
--- a/include/configs/ap152.h
+++ b/include/configs/ap152.h
@@ -6,8 +6,7 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define CONFIG_SYS_MHZ                  375
-#define CONFIG_SYS_MIPS_TIMER_FREQ      (CONFIG_SYS_MHZ * 1000000)
+#define CONFIG_SYS_MIPS_TIMER_FREQ      375000000
 
 #define CONFIG_SYS_SDRAM_BASE           0x80000000
 
diff --git a/include/configs/ci20.h b/include/configs/ci20.h
index 192da01..7e8a9fc 100644
--- a/include/configs/ci20.h
+++ b/include/configs/ci20.h
@@ -10,8 +10,7 @@
 #define __CONFIG_CI20_H__
 
 /* Ingenic JZ4780 clock configuration. */
-#define CONFIG_SYS_MHZ			1200
-#define CONFIG_SYS_MIPS_TIMER_FREQ	(CONFIG_SYS_MHZ * 1000000)
+#define CONFIG_SYS_MIPS_TIMER_FREQ	1200000000
 
 /* Memory configuration */
 #define CONFIG_SYS_MONITOR_LEN		(512 * 1024)
diff --git a/include/configs/malta.h b/include/configs/malta.h
index 5a42cee..080d8aa 100644
--- a/include/configs/malta.h
+++ b/include/configs/malta.h
@@ -18,8 +18,7 @@
 /*
  * CPU Configuration
  */
-#define CONFIG_SYS_MHZ			250	/* arbitrary value */
-#define CONFIG_SYS_MIPS_TIMER_FREQ	(CONFIG_SYS_MHZ * 1000000)
+#define CONFIG_SYS_MIPS_TIMER_FREQ	250000000
 
 /*
  * Memory map
diff --git a/include/configs/tplink_wdr4300.h b/include/configs/tplink_wdr4300.h
index f5466fd..1400a21 100644
--- a/include/configs/tplink_wdr4300.h
+++ b/include/configs/tplink_wdr4300.h
@@ -6,8 +6,7 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define CONFIG_SYS_MHZ			280
-#define CONFIG_SYS_MIPS_TIMER_FREQ	(CONFIG_SYS_MHZ * 1000000)
+#define CONFIG_SYS_MIPS_TIMER_FREQ	280000000
 
 #define CONFIG_SYS_SDRAM_BASE		0xa0000000
 
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 1855652..e679df4 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -872,7 +872,6 @@
 CONFIG_SYS_MEMORY_BASE
 CONFIG_SYS_MEM_RESERVE_SECURE
 CONFIG_SYS_MFD
-CONFIG_SYS_MHZ
 CONFIG_SYS_MIPS_TIMER_FREQ
 CONFIG_SYS_MMC_CD_PIN
 CONFIG_SYS_MMC_CLK_OD