diff options
Diffstat (limited to 'cpu/mpc86xx/speed.c')
| -rw-r--r-- | cpu/mpc86xx/speed.c | 19 |
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, |