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-rw-r--r--cpu/mpc85xx/fdt.c2
-rw-r--r--cpu/mpc85xx/speed.c31
-rw-r--r--include/asm-ppc/immap_85xx.h4
3 files changed, 34 insertions, 3 deletions
diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c
index bde6d1e..bb87740 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 d90d397..699441b4 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;
diff --git a/include/asm-ppc/immap_85xx.h b/include/asm-ppc/immap_85xx.h
index 01cb2d7..dc6e278 100644
--- a/include/asm-ppc/immap_85xx.h
+++ b/include/asm-ppc/immap_85xx.h
@@ -1570,7 +1570,9 @@ typedef struct ccsr_gur {
#define MPC85xx_PORDEVSR_RIO_CTLS 0x00000008
#define MPC85xx_PORDEVSR_RIO_DEV_ID 0x00000007
uint pordbgmsr; /* 0xe0010 - POR debug mode status register */
- char res1[12];
+ uint pordevsr2; /* 0xe0014 - POR I/O device status regsiter 2 */
+#define MPC85xx_PORDEVSR2_SEC_CFG 0x00000020
+ char res1[8];
uint gpporcr; /* 0xe0020 - General-purpose POR configuration register */
char res2[12];
uint gpiocr; /* 0xe0030 - GPIO control register */