From 43f83a8f9963a11a9c3f41beecc363da21ae3602 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Tue, 27 May 2008 01:37:26 -0400
Subject: Input: wm9713 - support five wire panels
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---
drivers/input/touchscreen/wm9713.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
(limited to 'drivers/input/touchscreen')
diff --git a/drivers/input/touchscreen/wm9713.c b/drivers/input/touchscreen/wm9713.c
index 01278bd7e65c..838458792ea0 100644
--- a/drivers/input/touchscreen/wm9713.c
+++ b/drivers/input/touchscreen/wm9713.c
@@ -84,6 +84,15 @@ static int delay = 4;
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.
*
@@ -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;
--
cgit