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net: ipa: rework ipa_aggr_granularity_val()

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The timer used for aggregation makes use of an internal 32 KHz clock.
The granularity of the timer is programmed by a field whose value is
computed by ipa_aggr_granularity_val().  Redefine the way that value
is computed by using a new TIMER_FREQUENCY constant representing the
underlying clock frequency.

Add two BUILD_BUG_ON() calls to ensure the value used is valid.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder
2020-06-29 16:55:21 -05:00
committed by David S. Miller
parent 8c96439724
commit 317a5740b7
2 changed files with 13 additions and 9 deletions
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5
drivers/net/ipa/ipa_main.c
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@@ -674,6 +674,11 @@ static void ipa_validate_build(void)
/* This is used as a divisor */
BUILD_BUG_ON(!IPA_AGGR_GRANULARITY);
/* Aggregation granularity value can't be 0, and must fit */
BUILD_BUG_ON(!ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY));
BUILD_BUG_ON(ipa_aggr_granularity_val(IPA_AGGR_GRANULARITY) >
field_max(AGGR_GRANULARITY));
#endif /* IPA_VALIDATE */
}