regulator: tps65090: Make FETs more reliable by adding retries
An issue was discovered with tps65090 where sometimes the FETs wouldn't actually turn on when requested (they would report overcurrent). The most problematic FET was the one used for the LCD backlight on the Samsung ARM Chromebook (FET1). Problems were especially prevalent when the device was plugged in to AC power (when the backlight voltage was higher). Mitigate the problem by adding retries on the enables of the FETs, which works around the problem fairly effectively. Signed-off-by: NDoug Anderson <dianders@chromium.org> Signed-off-by: NSimon Glass <sjg@chromium.org> Signed-off-by: NMichael Spang <spang@chromium.org> Signed-off-by: NSean Paul <seanpaul@chromium.org> Reviewed-by: NSimon Glass <sjg@chromium.org> Signed-off-by: NMark Brown <broonie@linaro.org>
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