X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=cpu%2Fmpc85xx%2Fspeed.c;h=d9f9a8c38a7201d66c328923e2dad0533f94e40f;hb=6d0f6bcf337c5261c08fabe12982178c2c489d76;hp=d90d39767b6451217ed98c9f9acb6f64c3eea45b;hpb=38b189fe749824ea9b1c5422865e78b4b7eb2494;p=platform%2Fkernel%2Fu-boot.git

diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c
index d90d397..d9f9a8c 100644
--- a/cpu/mpc85xx/speed.c
+++ b/cpu/mpc85xx/speed.c
@@ -35,7 +35,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 void get_sys_info (sys_info_t * sysInfo)
 {
-	volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
+	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	uint plat_ratio,e500_ratio,half_freqSystemBus;
 
 	plat_ratio = (gur->porpllsr) & 0x0000003e;
@@ -54,7 +54,8 @@ void get_sys_info (sys_info_t * sysInfo)
 
 #ifdef CONFIG_DDR_CLK_FREQ
 	{
-		u32 ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9;
+		u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
+			>> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
 		if (ddr_ratio != 0x7)
 			sysInfo->freqDDRBus = ddr_ratio * CONFIG_DDR_CLK_FREQ;
 	}
@@ -65,8 +66,11 @@ void get_sys_info (sys_info_t * sysInfo)
 int get_clocks (void)
 {
 	sys_info_t sys_info;
+#ifdef CONFIG_MPC8544
+	volatile ccsr_gur_t *gur = (void *) CONFIG_SYS_MPC85xx_GUTS_ADDR;
+#endif
 #if defined(CONFIG_CPM2)
-	volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CFG_MPC85xx_CPM_ADDR;
+	volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR;
 	uint sccr, dfbrg;
 
 	/* set VCO = 4 * BRG */
@@ -78,8 +82,38 @@ int get_clocks (void)
 	gd->cpu_clk = sys_info.freqProcessor;
 	gd->bus_clk = sys_info.freqSystemBus;
 	gd->mem_clk = sys_info.freqDDRBus;
+
+	/*
+	 * The base clock for I2C depends on the actual SOC.  Unfortunately,
+	 * there is no pattern that can be used to determine the frequency, so
+	 * the only choice is to look up the actual SOC number and use the value
+	 * for that SOC. This information is taken from application note
+	 * AN2919.
+	 */
+#if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+	defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555)
 	gd->i2c1_clk = sys_info.freqSystemBus;
-	gd->i2c2_clk = sys_info.freqSystemBus;
+#elif defined(CONFIG_MPC8544)
+	/*
+	 * On the 8544, the I2C clock is the same as the SEC clock.  This can be
+	 * either CCB/2 or CCB/3, depending on the value of cfg_sec_freq. See
+	 * 4.4.3.3 of the 8544 RM.  Note that this might actually work for all
+	 * 85xx, but only the 8544 has cfg_sec_freq, so it's unknown if the
+	 * PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544.
+	 */
+	if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG)
+		gd->i2c1_clk = sys_info.freqSystemBus / 2;
+	else
+		gd->i2c1_clk = sys_info.freqSystemBus / 3;
+#else
+	/* Most 85xx SOCs use CCB/2, so this is the default behavior. */
+	gd->i2c1_clk = sys_info.freqSystemBus / 2;
+#endif
+	gd->i2c2_clk = gd->i2c1_clk;
+
+#if defined(CONFIG_MPC8536)
+	gd->sdhc_clk = gd->bus_clk / 2;
+#endif
 
 #if defined(CONFIG_CPM2)
 	gd->vco_out = 2*sys_info.freqSystemBus;