Merge branch 'master' of git://www.denx.de/git/u-boot-mpc85xx

2 files changed, 31 insertions, 2 deletions

diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c
index bde6d1e963..bb87740baa 100644
--- a/cpu/mpc85xx/fdt.c
+++ b/cpu/mpc85xx/fdt.c
@@ -52,7 +52,7 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
 			if (*reg == id) {
 				fdt_setprop_string(blob, off, "status", "okay");
 			} else {
-				u32 val = *reg * SIZE_BOOT_ENTRY + spin_tbl_addr;
+				u64 val = *reg * SIZE_BOOT_ENTRY + spin_tbl_addr;
 				val = cpu_to_fdt32(val);
 				fdt_setprop_string(blob, off, "status",
 								"disabled");
diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c
index d90d39767b..699441b46a 100644
--- a/cpu/mpc85xx/speed.c
+++ b/cpu/mpc85xx/speed.c
@@ -65,6 +65,9 @@ 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 *) CFG_MPC85xx_GUTS_ADDR;
+#endif
 #if defined(CONFIG_CPM2)
 	volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CFG_MPC85xx_CPM_ADDR;
 	uint sccr, dfbrg;
@@ -78,8 +81,34 @@ 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 / 3;
+	else
+		gd->i2c1_clk = sys_info.freqSystemBus / 2;
+#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_CPM2)
 	gd->vco_out = 2*sys_info.freqSystemBus;