Input: ads7846 - support swapping x and y axes

Signed-off-by: Michael Roth <mroth@nessie.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 2b01e56568f8..b5ad252f5cf1 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -97,6 +97,8 @@ struct ads7846 {
         u16                     x_plate_ohms;
         u16                     pressure_max;
 
+        bool                    swap_xy;
+
         struct ads7846_packet   *packet;
 
         struct spi_transfer     xfer[18];
@@ -599,6 +601,10 @@ static void ads7846_rx(void *ads)
                         dev_dbg(&ts->spi->dev, "DOWN\n");
 #endif
                 }
+
+                if (ts->swap_xy)
+                        swap(x, y);
+
                 input_report_abs(input, ABS_X, x);
                 input_report_abs(input, ABS_Y, y);
                 input_report_abs(input, ABS_PRESSURE, Rt);
@@ -917,6 +923,7 @@ static int __devinit ads7846_probe(struct spi_device *spi)
         ts->spi = spi;
         ts->input = input_dev;
         ts->vref_mv = pdata->vref_mv;
+        ts->swap_xy = pdata->swap_xy;
 
         hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
         ts->timer.function = ads7846_timer;
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index 2ea20320c093..51948eb6927a 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -17,6 +17,7 @@ struct ads7846_platform_data {
         u16     vref_mv;                /* external vref value, milliVolts */
         bool    keep_vref_on;           /* set to keep vref on for differential
                                          * measurements as well */
+        bool    swap_xy;                /* swap x and y axes */
 
         /* Settling time of the analog signals; a function of Vcc and the
          * capacitance on the X/Y drivers.  If set to non-zero, two samples