diff options
Diffstat (limited to 'cpu/mpc8xx/speed.c')
| -rw-r--r-- | cpu/mpc8xx/speed.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/cpu/mpc8xx/speed.c b/cpu/mpc8xx/speed.c index ef32371..e1c3400 100644 --- a/cpu/mpc8xx/speed.c +++ b/cpu/mpc8xx/speed.c @@ -114,18 +114,18 @@ int get_clocks (void) /* * PIT setup: * - * We want to time for SPEED_PITC_COUNTS counts (of 8192 Hz), - * so the count value would be SPEED_PITC_COUNTS - 1. - * But there would be an uncertainty in the start time of 1/4 - * count since when we enable the PIT the count is not - * synchronized to the 32768 Hz oscillator. The trick here is - * to start the count higher and wait until the PIT count - * changes to the required value before starting timer 2. + * We want to time for SPEED_PITC_COUNTS counts (of 8192 Hz), + * so the count value would be SPEED_PITC_COUNTS - 1. + * But there would be an uncertainty in the start time of 1/4 + * count since when we enable the PIT the count is not + * synchronized to the 32768 Hz oscillator. The trick here is + * to start the count higher and wait until the PIT count + * changes to the required value before starting timer 2. * - * One count high should be enough, but occasionally the start - * is off by 1 or 2 counts of 32768 Hz. With the start value - * set two counts high it seems very reliable. - */ + * One count high should be enough, but occasionally the start + * is off by 1 or 2 counts of 32768 Hz. With the start value + * set two counts high it seems very reliable. + */ immr->im_sitk.sitk_pitck = KAPWR_KEY; /* PIT initialization */ immr->im_sit.sit_pitc = SPEED_PITC_INIT; @@ -163,10 +163,10 @@ int get_clocks (void) #else /* CONFIG_8xx_GCLK_FREQ */ /* - * If for some reason measuring the gclk frequency won't - * work, we return the hardwired value. - * (For example, the cogent CMA286-60 CPU module has no - * separate oscillator for PITRTCLK) + * If for some reason measuring the gclk frequency won't + * work, we return the hardwired value. + * (For example, the cogent CMA286-60 CPU module has no + * separate oscillator for PITRTCLK) */ gd->cpu_clk = CONFIG_8xx_GCLK_FREQ; |