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i.MX31: document timer precision option
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
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README.imx31
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README.imx31
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i.MX31 specific Configuration Options:
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--------------------------------------
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- Timer precision:
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CONFIG_MX31_TIMER_HIGH_PRECISION
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Enable higher precision timer. The low-precision timer
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(default) provides approximately 4% error, whereas the
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high-precision timer is about 0.4% accurate. The extra
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accuracy is achieved at the cost of higher computational
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overhead, which, in places where time is measured, should
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not be critical, so, it should be safe to enable this
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option.
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