summaryrefslogtreecommitdiff
path: root/cpu/mpc86xx/speed.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpu/mpc86xx/speed.c')
-rw-r--r--cpu/mpc86xx/speed.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/cpu/mpc86xx/speed.c b/cpu/mpc86xx/speed.c
index 415ac9d..64a3479 100644
--- a/cpu/mpc86xx/speed.c
+++ b/cpu/mpc86xx/speed.c
@@ -28,6 +28,7 @@
#include <common.h>
#include <mpc86xx.h>
#include <asm/processor.h>
+#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -39,6 +40,7 @@ void get_sys_info(sys_info_t *sysInfo)
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile ccsr_gur_t *gur = &immap->im_gur;
uint plat_ratio, e600_ratio;
+ uint lcrr_div;
plat_ratio = (gur->porpllsr) & 0x0000003e;
plat_ratio >>= 1;
@@ -90,6 +92,22 @@ void get_sys_info(sys_info_t *sysInfo)
sysInfo->freqProcessor = e600_ratio + sysInfo->freqSystemBus;
break;
}
+
+#if defined(CONFIG_SYS_LBC_LCRR)
+ /* We will program LCRR to this value later */
+ lcrr_div = CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV;
+#else
+ {
+ volatile ccsr_lbc_t *lbc = &immap->im_lbc;
+ lcrr_div = in_be32(&lbc->lcrr) & LCRR_CLKDIV;
+ }
+#endif
+ if (lcrr_div == 2 || lcrr_div == 4 || lcrr_div == 8) {
+ sysInfo->freqLocalBus = sysInfo->freqSystemBus / (lcrr_div * 2);
+ } else {
+ /* In case anyone cares what the unknown value is */
+ sysInfo->freqLocalBus = lcrr_div;
+ }
}
@@ -105,6 +123,7 @@ int get_clocks(void)
get_sys_info(&sys_info);
gd->cpu_clk = sys_info.freqProcessor;
gd->bus_clk = sys_info.freqSystemBus;
+ gd->lbc_clk = sys_info.freqLocalBus;
/*
* The base clock for I2C depends on the actual SOC. Unfortunately,