Input: wm9713 - support five wire panels

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/touchscreen/wm9713.c b/drivers/input/touchscreen/wm9713.c
index 01278bd..8384587 100644 (file)
--- a/drivers/input/touchscreen/wm9713.c
+++ b/drivers/input/touchscreen/wm9713.c
@@ -85,6 +85,15 @@ module_param(delay, int, 0);
 MODULE_PARM_DESC(delay, "Set adc sample delay.");
 
 /*
+ * Set five_wire = 1 to use a 5 wire touchscreen.
+ *
+ * NOTE: Five wire mode does not allow for readback of pressure.
+ */
+static int five_wire;
+module_param(five_wire, int, 0);
+MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen.");
+
+/*
  * Set adc mask function.
  *
  * Sources of glitch noise, such as signals driving an LCD display, may feed
@@ -162,6 +171,19 @@ static void wm9713_phy_init(struct wm97xx *wm)
                         64000 / rpu);
        }
 
+       /* Five wire panel? */
+       if (five_wire) {
+               dig3 |= WM9713_45W;
+               dev_info(wm->dev, "setting 5-wire touchscreen mode.");
+
+               if (pil) {
+                       dev_warn(wm->dev,
+                                "Pressure measurement not supported in 5 "
+                                "wire mode, disabling\n");
+                       pil = 0;
+               }
+       }
+
        /* touchpanel pressure */
        if (pil == 2) {
                dig3 |= WM9712_PIL;

diff --git a/include/linux/wm97xx.h b/include/linux/wm97xx.h
index 4d13732..6f69968 100644 (file)
--- a/include/linux/wm97xx.h
+++ b/include/linux/wm97xx.h
@@ -100,6 +100,7 @@
 #define WM9713_ADCSEL_Y                0x0004  /* Y measurement */
 #define WM9713_ADCSEL_PRES     0x0008  /* Pressure measurement */
 #define WM9713_COO             0x0001  /* enable coordinate mode */
+#define WM9713_45W             0x1000  /* set for 5 wire panel */
 #define WM9713_PDEN            0x0800  /* measure only when pen down */
 #define WM9713_ADCSEL_MASK     0x00fe  /* ADC selection mask */
 #define WM9713_WAIT            0x0200  /* coordinate wait */