MAX6639_NUM_CHANNELS
for (i = 0; i < MAX6639_NUM_CHANNELS; i++) {
u8 ppr[MAX6639_NUM_CHANNELS]; /* Pulses per rotation 0..3 for 1..4 ppr */
u8 rpm_range[MAX6639_NUM_CHANNELS]; /* Index in above rpm_ranges table */
u32 target_rpm[MAX6639_NUM_CHANNELS];