diff options
Diffstat (limited to 'cpu/mpc86xx')
| -rw-r--r-- | cpu/mpc86xx/speed.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/cpu/mpc86xx/speed.c b/cpu/mpc86xx/speed.c index 7e884f8..da5b58b 100644 --- a/cpu/mpc86xx/speed.c +++ b/cpu/mpc86xx/speed.c @@ -105,8 +105,20 @@ int get_clocks(void) get_sys_info(&sys_info); gd->cpu_clk = sys_info.freqProcessor; gd->bus_clk = sys_info.freqSystemBus; + + /* + * 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. + */ +#ifdef CONFIG_MPC8610 gd->i2c1_clk = sys_info.freqSystemBus; - gd->i2c2_clk = sys_info.freqSystemBus; +#else + gd->i2c1_clk = sys_info.freqSystemBus / 2; +#endif + gd->i2c2_clk = gd->i2c1_clk; if (gd->cpu_clk != 0) return 0; |