mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-04 18:53:05 +00:00
c9e617a563
The pen down IRQ will toggle during each X,Y,Z measurement cycle. Even though the IRQ is disabled it will be latched and delivered when after enable_irq. Thus in the IRQ handler we must avoid starting a new measurement cycle when such an "unwanted" IRQ happens. Add a get_pendown_state platform function, which will probably determine this by reading the current GPIO level of the pen IRQ pin. Move the IRQ reenabling from the SPI RX function to the timer. After the last power down message the pen IRQ pin is still active for a while and get_pendown_state would report incorrectly a pen down state. When suspending we should check the ts->pending flag instead of ts->pendown, since the timer can be pending regardless of ts->pendown. Also if ts->pending is set we can be sure that the timer is running, so no need to rearm it. Similarly if ts->pending is not set we can be sure that the IRQ is enabled (and the timer is not). Signed-off-by: Imre Deak <imre.deak@nokia.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
23 lines
606 B
C
23 lines
606 B
C
/* linux/spi/ads7846.h */
|
|
|
|
/* Touchscreen characteristics vary between boards and models. The
|
|
* platform_data for the device's "struct device" holds this information.
|
|
*
|
|
* It's OK if the min/max values are zero.
|
|
*/
|
|
struct ads7846_platform_data {
|
|
u16 model; /* 7843, 7845, 7846. */
|
|
u16 vref_delay_usecs; /* 0 for external vref; etc */
|
|
u16 x_plate_ohms;
|
|
u16 y_plate_ohms;
|
|
|
|
u16 x_min, x_max;
|
|
u16 y_min, y_max;
|
|
u16 pressure_min, pressure_max;
|
|
|
|
u16 debounce_max; /* max number of readings per sample */
|
|
u16 debounce_tol; /* tolerance used for filtering */
|
|
|
|
int (*get_pendown_state)(void);
|
|
};
|
|
|