diff mbox

[v5,4/4] Input: cyttsp - perform hard reset of the chip during probe

Message ID f5311f917c21caf5ba0cb8cca8220c43f46f0d0c.1453414661.git.oreste.salerno@tomtom.com (mailing list archive)
State Accepted
Headers show

Commit Message

Oreste Salerno Jan. 21, 2016, 10:21 p.m. UTC 
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 <oreste.salerno@tomtom.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox

Patch

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index d91668d..0fd0956 100644
--- 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;
@@ -663,6 +673,8 @@  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);