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-rw-r--r--drivers/input/touchscreen/wm9713.c22
1 files changed, 22 insertions, 0 deletions
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
@@ -85,6 +85,15 @@ module_param(delay, int, 0);
85MODULE_PARM_DESC(delay, "Set adc sample delay."); 85MODULE_PARM_DESC(delay, "Set adc sample delay.");
86 86
87/* 87/*
88 * Set five_wire = 1 to use a 5 wire touchscreen.
89 *
90 * NOTE: Five wire mode does not allow for readback of pressure.
91 */
92static int five_wire;
93module_param(five_wire, int, 0);
94MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen.");
95
96/*
88 * Set adc mask function. 97 * Set adc mask function.
89 * 98 *
90 * Sources of glitch noise, such as signals driving an LCD display, may feed 99 * 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)
162 64000 / rpu); 171 64000 / rpu);
163 } 172 }
164 173
174 /* Five wire panel? */
175 if (five_wire) {
176 dig3 |= WM9713_45W;
177 dev_info(wm->dev, "setting 5-wire touchscreen mode.");
178
179 if (pil) {
180 dev_warn(wm->dev,
181 "Pressure measurement not supported in 5 "
182 "wire mode, disabling\n");
183 pil = 0;
184 }
185 }
186
165 /* touchpanel pressure */ 187 /* touchpanel pressure */
166 if (pil == 2) { 188 if (pil == 2) {
167 dig3 |= WM9712_PIL; 189 dig3 |= WM9712_PIL;