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Input: adxl34x - add support for ADXL346 orientation sensing

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Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Michael Hennerich 2010-06-25 08:44:10 -07:00 committed by Dmitry Torokhov
parent e27c729219
commit 671386bb23
2 changed files with 114 additions and 4 deletions
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62
drivers/input/misc/adxl34x.c
View file

@ -196,6 +196,8 @@ struct adxl34x {
struct axis_triple hwcal;
struct axis_triple saved;
char phys[32];
unsigned orient2d_saved;
unsigned orient3d_saved;
bool disabled; /* P: mutex */
bool opened; /* P: mutex */
bool fifo_delay;
@ -296,7 +298,7 @@ static irqreturn_t adxl34x_irq(int irq, void *handle)
{
struct adxl34x *ac = handle;
struct adxl34x_platform_data *pdata = &ac->pdata;
int int_stat, tap_stat, samples;
int int_stat, tap_stat, samples, orient, orient_code;
/*
* ACT_TAP_STATUS should be read before clearing the interrupt
@ -332,6 +334,36 @@ static irqreturn_t adxl34x_irq(int irq, void *handle)
pdata->ev_code_act_inactivity, 0);
}
/*
* ORIENTATION SENSING ADXL346 only
*/
if (pdata->orientation_enable) {
orient = AC_READ(ac, ORIENT);
if ((pdata->orientation_enable & ADXL_EN_ORIENTATION_2D) &&
(orient & ADXL346_2D_VALID)) {
orient_code = ADXL346_2D_ORIENT(orient);
/* Report orientation only when it changes */
if (ac->orient2d_saved != orient_code) {
ac->orient2d_saved = orient_code;
adxl34x_report_key_single(ac->input,
pdata->ev_codes_orient_2d[orient_code]);
}
}
if ((pdata->orientation_enable & ADXL_EN_ORIENTATION_3D) &&
(orient & ADXL346_3D_VALID)) {
orient_code = ADXL346_3D_ORIENT(orient) - 1;
/* Report orientation only when it changes */
if (ac->orient3d_saved != orient_code) {
ac->orient3d_saved = orient_code;
adxl34x_report_key_single(ac->input,
pdata->ev_codes_orient_3d[orient_code]);
}
}
}
if (int_stat & (DATA_READY | WATERMARK)) {
if (pdata->fifo_mode)
@ -641,7 +673,7 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
struct adxl34x *ac;
struct input_dev *input_dev;
const struct adxl34x_platform_data *pdata;
int err, range;
int err, range, i;
unsigned char revid;
if (!irq) {
@ -797,12 +829,34 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
AC_WRITE(ac, FIFO_CTL, FIFO_MODE(pdata->fifo_mode) |
SAMPLES(pdata->watermark));
if (pdata->use_int2)
if (pdata->use_int2) {
/* Map all INTs to INT2 */
AC_WRITE(ac, INT_MAP, ac->int_mask | OVERRUN);
else
} else {
/* Map all INTs to INT1 */
AC_WRITE(ac, INT_MAP, 0);
}
if (ac->model == 346 && ac->pdata.orientation_enable) {
AC_WRITE(ac, ORIENT_CONF,
ORIENT_DEADZONE(ac->pdata.deadzone_angle) |
ORIENT_DIVISOR(ac->pdata.divisor_length));
ac->orient2d_saved = 1234;
ac->orient3d_saved = 1234;
if (pdata->orientation_enable & ADXL_EN_ORIENTATION_3D)
for (i = 0; i < ARRAY_SIZE(pdata->ev_codes_orient_3d); i++)
__set_bit(pdata->ev_codes_orient_3d[i],
input_dev->keybit);
if (pdata->orientation_enable & ADXL_EN_ORIENTATION_2D)
for (i = 0; i < ARRAY_SIZE(pdata->ev_codes_orient_2d); i++)
__set_bit(pdata->ev_codes_orient_2d[i],
input_dev->keybit);
} else {
ac->pdata.orientation_enable = 0;
}
AC_WRITE(ac, INT_ENABLE, ac->int_mask | OVERRUN);

56
include/linux/input/adxl34x.h
View file

@ -288,6 +288,62 @@ struct adxl34x_platform_data {
u32 ev_code_ff; /* EV_KEY */
u32 ev_code_act_inactivity; /* EV_KEY */
/*
* Use ADXL34x INT2 instead of INT1
*/
u8 use_int2;
/*
* ADXL346 only ORIENTATION SENSING feature
* The orientation function of the ADXL346 reports both 2-D and
* 3-D orientation concurrently.
*/
#define ADXL_EN_ORIENTATION_2D 1
#define ADXL_EN_ORIENTATION_3D 2
#define ADXL_EN_ORIENTATION_2D_3D 3
u8 orientation_enable;
/*
* The width of the deadzone region between two or more
* orientation positions is determined by setting the Deadzone
* value. The deadzone region size can be specified with a
* resolution of 3.6deg. The deadzone angle represents the total
* angle where the orientation is considered invalid.
*/
#define ADXL_DEADZONE_ANGLE_0p0 0 /* !!!0.0 [deg] */
#define ADXL_DEADZONE_ANGLE_3p6 1 /* 3.6 [deg] */
#define ADXL_DEADZONE_ANGLE_7p2 2 /* 7.2 [deg] */
#define ADXL_DEADZONE_ANGLE_10p8 3 /* 10.8 [deg] */
#define ADXL_DEADZONE_ANGLE_14p4 4 /* 14.4 [deg] */
#define ADXL_DEADZONE_ANGLE_18p0 5 /* 18.0 [deg] */
#define ADXL_DEADZONE_ANGLE_21p6 6 /* 21.6 [deg] */
#define ADXL_DEADZONE_ANGLE_25p2 7 /* 25.2 [deg] */
u8 deadzone_angle;
/*
* To eliminate most human motion such as walking or shaking,
* a Divisor value should be selected to effectively limit the
* orientation bandwidth. Set the depth of the filter used to
* low-pass filter the measured acceleration for stable
* orientation sensing
*/
#define ADXL_LP_FILTER_DIVISOR_2 0
#define ADXL_LP_FILTER_DIVISOR_4 1
#define ADXL_LP_FILTER_DIVISOR_8 2
#define ADXL_LP_FILTER_DIVISOR_16 3
#define ADXL_LP_FILTER_DIVISOR_32 4
#define ADXL_LP_FILTER_DIVISOR_64 5
#define ADXL_LP_FILTER_DIVISOR_128 6
#define ADXL_LP_FILTER_DIVISOR_256 7
u8 divisor_length;
u32 ev_codes_orient_2d[4]; /* EV_KEY {+X, -X, +Y, -Y} */
u32 ev_codes_orient_3d[6]; /* EV_KEY {+Z, +Y, +X, -X, -Y, -Z} */
};
#endif