diff options
Diffstat (limited to 'drivers/net/ipa/ipa_main.c')
| -rw-r--r-- | drivers/net/ipa/ipa_main.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c index 62d82d48aed6..ba1bfc30210a 100644 --- a/drivers/net/ipa/ipa_main.c +++ b/drivers/net/ipa/ipa_main.c @@ -287,6 +287,21 @@ ipa_hardware_config_qsb(struct ipa *ipa, const struct ipa_data *data) iowrite32(val, ipa->reg_virt + IPA_REG_QSB_MAX_READS_OFFSET); } +/* The internal inactivity timer clock is used for the aggregation timer */ +#define TIMER_FREQUENCY 32000 /* 32 KHz inactivity timer clock */ + +/* Compute the value to use in the COUNTER_CFG register AGGR_GRANULARITY + * field to represent the given number of microseconds. The value is one + * less than the number of timer ticks in the requested period. 0 is not + * a valid granularity value. + */ +static u32 ipa_aggr_granularity_val(u32 usec) +{ + /* assert(usec != 0); */ + + return DIV_ROUND_CLOSEST(usec * TIMER_FREQUENCY, USEC_PER_SEC) - 1; +} + /* IPA uses unified Qtime starting at IPA v4.5, implementing various * timestamps and timers independent of the IPA core clock rate. The * Qtimer is based on a 56-bit timestamp incremented at each tick of |