Input: cyttsp - perform hard reset of the chip during probe

Since we removed support for calling an init() callback from the platform data, introduce a function which initializes the chip by performing a hard reset, using the reset gpio defined in the device properties. Signed-off-by: Oreste Salerno <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
jledet · Jan 27, 2016 · 8fb81d2 · 8fb81d2
1 parent 707b61b
commit 8fb81d2
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
@@ -240,6 +240,16 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
 	return retval;
 }
 
+static void cyttsp_hard_reset(struct cyttsp *ts)
+{
+	if (ts->reset_gpio) {
+		gpiod_set_value_cansleep(ts->reset_gpio, 1);
+		msleep(CY_DELAY_DFLT);
+		gpiod_set_value_cansleep(ts->reset_gpio, 0);
+		msleep(CY_DELAY_DFLT);
+	}
+}
+
 static int cyttsp_soft_reset(struct cyttsp *ts)
 {
 	unsigned long timeout;
@@ -666,6 +676,8 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 
 	disable_irq(ts->irq);
 
+	cyttsp_hard_reset(ts);
+
 	error = cyttsp_power_on(ts);
 	if (error)
 		return ERR_PTR(error);