[PATCH v2 4/6] Input: goodix - Push error logging up into i2c_read and i2c_write helpers

[Hans de Goede <hdegoede@redhat.com>]

Make the goodix_i2c_read() and goodix_i2c_write*() helpers log errors
themselves. This allows removing all the error logging from their callers.

This already results in a nice cleanup with the current code and it also
helps to make the upcoming support for controllers without flash cleaner.

Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/input/touchscreen/goodix.c | 68 ++++++++++++------------------
 1 file changed, 28 insertions(+), 40 deletions(-)

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 7ab4a19fb2bf..2205ebb9325e 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -172,7 +172,13 @@ int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len)
 	msgs[1].buf   = buf;
 
 	ret = i2c_transfer(client->adapter, msgs, 2);
-	return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0);
+	if (ret >= 0)
+		ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO);
+
+	if (ret)
+		dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n",
+			len, reg, ret);
+	return ret;
 }
 
 /**
@@ -203,8 +209,15 @@ int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len)
 	msg.len = len + 2;
 
 	ret = i2c_transfer(client->adapter, &msg, 1);
+	if (ret >= 0)
+		ret = (ret == 1 ? 0 : -EIO);
+
 	kfree(addr_buf);
-	return ret < 0 ? ret : (ret != 1 ? -EIO : 0);
+
+	if (ret)
+		dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n",
+			len, reg, ret);
+	return ret;
 }
 
 int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
@@ -244,13 +257,9 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 	 */
 	max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
 	do {
-		error = goodix_i2c_read(ts->client, addr, data,
-					header_contact_keycode_size);
-		if (error) {
-			dev_err(&ts->client->dev, "I2C transfer error: %d\n",
-					error);
+		error = goodix_i2c_read(ts->client, addr, data, header_contact_keycode_size);
+		if (error)
 			return error;
-		}
 
 		if (data[0] & GOODIX_BUFFER_STATUS_READY) {
 			touch_num = data[0] & 0x0f;
@@ -260,10 +269,8 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 			if (touch_num > 1) {
 				addr += header_contact_keycode_size;
 				data += header_contact_keycode_size;
-				error = goodix_i2c_read(ts->client,
-						addr, data,
-						ts->contact_size *
-							(touch_num - 1));
+				error = goodix_i2c_read(ts->client, addr, data,
+							ts->contact_size * (touch_num - 1));
 				if (error)
 					return error;
 			}
@@ -373,9 +380,7 @@ static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
 	struct goodix_ts_data *ts = dev_id;
 
 	goodix_process_events(ts);
-
-	if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0)
-		dev_err(&ts->client->dev, "I2C write end_cmd error\n");
+	goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0);
 
 	return IRQ_HANDLED;
 }
@@ -500,11 +505,9 @@ int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
 		return error;
 
 	error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len);
-	if (error) {
-		dev_err(&ts->client->dev, "Failed to write config data: %d",
-			error);
+	if (error)
 		return error;
-	}
+
 	dev_dbg(&ts->client->dev, "Config sent successfully.");
 
 	/* Let the firmware reconfigure itself, so sleep for 10ms */
@@ -890,8 +893,6 @@ static void goodix_read_config(struct goodix_ts_data *ts)
 	error = goodix_i2c_read(ts->client, ts->chip->config_addr,
 				ts->config, ts->chip->config_len);
 	if (error) {
-		dev_warn(&ts->client->dev, "Error reading config: %d\n",
-			 error);
 		ts->int_trigger_type = GOODIX_INT_TRIGGER;
 		ts->max_touch_num = GOODIX_MAX_CONTACTS;
 		return;
@@ -922,10 +923,8 @@ static int goodix_read_version(struct goodix_ts_data *ts)
 	char id_str[GOODIX_ID_MAX_LEN + 1];
 
 	error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
-	if (error) {
-		dev_err(&ts->client->dev, "read version failed: %d\n", error);
+	if (error)
 		return error;
-	}
 
 	memcpy(id_str, buf, GOODIX_ID_MAX_LEN);
 	id_str[GOODIX_ID_MAX_LEN] = 0;
@@ -951,13 +950,10 @@ static int goodix_i2c_test(struct i2c_client *client)
 	u8 test;
 
 	while (retry++ < 2) {
-		error = goodix_i2c_read(client, GOODIX_REG_ID,
-					&test, 1);
+		error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1);
 		if (!error)
 			return 0;
 
-		dev_err(&client->dev, "i2c test failed attempt %d: %d\n",
-			retry, error);
 		msleep(20);
 	}
 
@@ -1178,10 +1174,8 @@ static int goodix_ts_probe(struct i2c_client *client,
 	}
 
 	error = goodix_read_version(ts);
-	if (error) {
-		dev_err(&client->dev, "Read version failed.\n");
+	if (error)
 		return error;
-	}
 
 	ts->chip = goodix_get_chip_data(ts->id);
 
@@ -1249,10 +1243,8 @@ static int __maybe_unused goodix_suspend(struct device *dev)
 
 	usleep_range(5000, 6000);
 
-	error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND,
-				    GOODIX_CMD_SCREEN_OFF);
+	error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, GOODIX_CMD_SCREEN_OFF);
 	if (error) {
-		dev_err(&ts->client->dev, "Screen off command failed\n");
 		goodix_irq_direction_input(ts);
 		goodix_request_irq(ts);
 		return -EAGAIN;
@@ -1293,12 +1285,8 @@ static int __maybe_unused goodix_resume(struct device *dev)
 	if (error)
 		return error;
 
-	error = goodix_i2c_read(ts->client, ts->chip->config_addr,
-				&config_ver, 1);
-	if (error)
-		dev_warn(dev, "Error reading config version: %d, resetting controller\n",
-			 error);
-	else if (config_ver != ts->config[0])
+	error = goodix_i2c_read(ts->client, ts->chip->config_addr, &config_ver, 1);
+	if (!error && config_ver != ts->config[0])
 		dev_info(dev, "Config version mismatch %d != %d, resetting controller\n",
 			 config_ver, ts->config[0]);
 
-- 
2.31.1