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Input: ad7879 - fix deficient device disable

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Input close or device disable should not interact with the exported
gpiolib functionality. However that's the case. __ad7879_disable()
clears the entire AD7879_REG_CTRL2, while it should just power down
the ADC and its reference.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Michael Hennerich 2011-08-02 15:41:37 -07:00 committed by Dmitry Torokhov
parent 0a7a8fff7b
commit 4fecc2088f
1 changed files with 3 additions and 1 deletions
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4
drivers/input/touchscreen/ad7879.c
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@ -249,12 +249,14 @@ static void __ad7879_enable(struct ad7879 *ts)
static void __ad7879_disable(struct ad7879 *ts) static void __ad7879_disable(struct ad7879 *ts)
{ {
u16 reg = (ts->cmd_crtl2 & ~AD7879_PM(-1)) |
AD7879_PM(AD7879_PM_SHUTDOWN);
disable_irq(ts->irq); disable_irq(ts->irq);
if (del_timer_sync(&ts->timer)) if (del_timer_sync(&ts->timer))
ad7879_ts_event_release(ts); ad7879_ts_event_release(ts);
ad7879_write(ts, AD7879_REG_CTRL2, AD7879_PM(AD7879_PM_SHUTDOWN)); ad7879_write(ts, AD7879_REG_CTRL2, reg);
} }