Input: adxl34x - add support for ADXL346 orientation sensing

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>

1 files changed, 58 insertions, 4 deletions

diff --git a/drivers/input/misc/adxl34x.c b/drivers/input/misc/adxl34x.c
index 07f9ef631540..77fb40987059 100644
--- a/drivers/input/misc/adxl34x.c
+++ b/drivers/input/misc/adxl34x.c
@@ -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);