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| author | Michael Hennerich <michael.hennerich@analog.com> | 2011-08-02 15:41:37 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-08-02 22:17:44 -0700 |
| commit | 4fecc2088fd02ce8a6580c12822987d3c6bab9b8 (patch) | |
| tree | cc8aa9b806e1494f018c634c62936854b8275e62 /drivers/input/touchscreen | |
| parent | 0a7a8fff7b8a3bc2d3528af07c9c88083250303d (diff) | |
| download | lwn-4fecc2088fd02ce8a6580c12822987d3c6bab9b8.tar.gz lwn-4fecc2088fd02ce8a6580c12822987d3c6bab9b8.zip | |
Input: ad7879 - fix deficient device disable
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>
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/ad7879.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index bc3b5187f3a3..131f9d1c921b 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -249,12 +249,14 @@ static void __ad7879_enable(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); if (del_timer_sync(&ts->timer)) ad7879_ts_event_release(ts); - ad7879_write(ts, AD7879_REG_CTRL2, AD7879_PM(AD7879_PM_SHUTDOWN)); + ad7879_write(ts, AD7879_REG_CTRL2, reg); } |