Integrate linux-imx-kuk/merge_ucb1400_read_fix
Commit: seco-ne/kernel/linux-imx-kuk@b065a0ed
driver:ucb1400: Remove sleep at beginning of poll_touch function
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Commit: seco-ne/kernel/linux-imx-kuk@786faa8a
driver:ucb1400: Add debug messages
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Commit: seco-ne/kernel/linux-imx-kuk@e7a0798a
driver:ucb1400: Add short sleep for pen-down debounce
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Commit: seco-ne/kernel/linux-imx-kuk@f8565c27
dts:mc3: Reduce UCB1400 debounce to 50 ms
The debounce period of 100 ms makes the touch input to slow. Reduce the time to 50 ms.
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Commit: seco-ne/kernel/linux-imx-kuk@3e1d1b0b
driver:ucb1400: Re-enable pen-down detection via bias mode
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Commit: seco-ne/kernel/linux-imx-kuk@3e36514d
driver:ucb1400: Disable pressure measurement
Remove the pressure measurement according to the old driver.
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Commit: seco-ne/kernel/linux-imx-kuk@332dad21
driver:ucb1400: Adapt the pen-down detection to old driver
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Commit: seco-ne/kernel/linux-imx-kuk@1dbf1c98
driver:ucb1400: Determine chip revision during probing
The chip revision is determined from the AC97_RESET register value.