[PATCH v3 15/49] Input: atmel_mxt_ts - report failures in suspend/resume

[Jiada Wang <jiada_wang@mentor.com>]

From: Nick Dyer <nick.dyer@itdev.co.uk>

(cherry picked from ndyer/linux/for-upstream commit 93a57575403de4dd07cd64807d3c2ed7f2cca262)
[gdavis: Resolve forward port conflicts due to applying upstream
	 commit 96a938aa214e ("Input: atmel_mxt_ts - remove platform
	 data support").]
Signed-off-by: George G. Davis <george_davis@mentor.com>
[jiada: Fix compilation warning]
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 51 ++++++++++++++++++------
 1 file changed, 39 insertions(+), 12 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 25ac42967bc7..4615e1591af4 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3425,10 +3425,12 @@ static void mxt_reset_slots(struct mxt_data *data)
 	mxt_input_sync(data);
 }
 
-static void mxt_start(struct mxt_data *data)
+static int mxt_start(struct mxt_data *data)
 {
+	int ret = 0;
+
 	if (!data->suspended || data->in_bootloader)
-		return;
+		return 0;
 
 	switch (data->suspend_mode) {
 	case MXT_SUSPEND_T9_CTRL:
@@ -3453,28 +3455,42 @@ static void mxt_start(struct mxt_data *data)
 		 */
 		mxt_process_messages_until_invalid(data);
 
-		mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
+		ret = mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
+		if (ret)
+			return ret;
 
 		/* Recalibrate since chip has been in deep sleep */
-		mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
+		ret = mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
+		if (ret)
+			return ret;
+
+		ret = mxt_acquire_irq(data);
+		if (ret)
+			return ret;
 
-		mxt_acquire_irq(data);
 		break;
 	}
 
 	data->suspended = false;
+
+	return 0;
 }
 
-static void mxt_stop(struct mxt_data *data)
+static int mxt_stop(struct mxt_data *data)
 {
+	int ret;
+
 	if (data->suspended || data->in_bootloader)
-		return;
+		return 0;
 
 	switch (data->suspend_mode) {
 	case MXT_SUSPEND_T9_CTRL:
 		/* Touch disable */
-		mxt_write_object(data,
+		ret = mxt_write_object(data,
 				MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
+		if (ret)
+			return ret;
+
 		break;
 
 	case MXT_SUSPEND_REGULATOR:
@@ -3487,29 +3503,40 @@ static void mxt_stop(struct mxt_data *data)
 	default:
 		disable_irq(data->irq);
 
-		mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
+		ret = mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
+		if (ret)
+			return ret;
 
 		mxt_reset_slots(data);
 		break;
 	}
 
 	data->suspended = true;
+	return 0;
 }
 
 static int mxt_input_open(struct input_dev *dev)
 {
 	struct mxt_data *data = input_get_drvdata(dev);
+	int ret;
 
-	mxt_start(data);
+	ret = mxt_start(data);
 
-	return 0;
+	if (ret)
+		dev_err(&data->client->dev, "%s failed rc=%d\n", __func__, ret);
+
+	return ret;
 }
 
 static void mxt_input_close(struct input_dev *dev)
 {
 	struct mxt_data *data = input_get_drvdata(dev);
+	int ret;
 
-	mxt_stop(data);
+	ret = mxt_stop(data);
+
+	if (ret)
+		dev_err(&data->client->dev, "%s failed rc=%d\n", __func__, ret);
 }
 
 static int mxt_parse_device_properties(struct mxt_data *data)
-- 
2.19.2