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authorGuennadi Liakhovetski <lg@denx.de>2008-08-28 12:25:11 +0200
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2008-09-12 01:23:44 +0200
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treefab2ef38387eceef33a1bb35b5e9a50104c29dbc
parent1a6337b01351b82a45b0defa76f08744511c580b (diff)
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i.MX31: document timer precision option
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
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+i.MX31 specific Configuration Options:
+--------------------------------------
+
+- Timer precision:
+ CONFIG_MX31_TIMER_HIGH_PRECISION
+
+ Enable higher precision timer. The low-precision timer
+ (default) provides approximately 4% error, whereas the
+ high-precision timer is about 0.4% accurate. The extra
+ accuracy is achieved at the cost of higher computational
+ overhead, which, in places where time is measured, should
+ not be critical, so, it should be safe to enable this
+ option.