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Paul Walmsley
197234520b
The receive FIFO wakeup latency estimate in the omap-serial driver is three orders of magnitude too small. This effectively prevents the MPU from going to a low-power state when CONFIG_CPU_IDLE=y. This is a major power management regression and masks some other FIFO-related bugs in the driver. Fix by correcting the most egregious problem in the RX wakeup latency estimate. There are several other flaws in the estimator; these will be fixed by a separate patch series intended for 3.4. The difference in low-power states with this patch can be observed via debugfs in pm_debug/count. This estimate does not have any effect when CONFIG_CPU_IDLE=n. Signed-off-by: Paul Walmsley <[email protected]> Cc: Tomi Valkeinen <[email protected]> Cc: Alan Cox <[email protected]> Acked-by: Govindraj.R <[email protected]> Reviewed-by: Kevin Hilman <[email protected]> Tested-by: Kevin Hilman <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>