From: Daniel Kurtz <djkurtz@chromium.org>
Date: Thu, 28 Jun 2012 13:08:13 +0000 (+0800)
Subject: Input: atmel_mxt_ts - optimize writing of object table entries
X-Git-Tag: master-2012-08-06~78^2^2~13^2~13
X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=cf94bc09c89c923d339c68cf89360c02578ceee3;p=~andy%2Flinux

Input: atmel_mxt_ts - optimize writing of object table entries

Write each object using a single bulk i2c write transfer.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index dd2577b796a..99d5210c7ae 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -655,7 +655,8 @@ static int mxt_check_reg_init(struct mxt_data *data)
 	struct mxt_object *object;
 	struct device *dev = &data->client->dev;
 	int index = 0;
-	int i, j, config_offset;
+	int i, size;
+	int ret;
 
 	if (!pdata->config) {
 		dev_dbg(dev, "No cfg data defined, skipping reg init\n");
@@ -668,18 +669,17 @@ static int mxt_check_reg_init(struct mxt_data *data)
 		if (!mxt_object_writable(object->type))
 			continue;
 
-		for (j = 0;
-		     j < (object->size + 1) * (object->instances + 1);
-		     j++) {
-			config_offset = index + j;
-			if (config_offset > pdata->config_length) {
-				dev_err(dev, "Not enough config data!\n");
-				return -EINVAL;
-			}
-			mxt_write_object(data, object->type, j,
-					 pdata->config[config_offset]);
+		size = (object->size + 1) * (object->instances + 1);
+		if (index + size > pdata->config_length) {
+			dev_err(dev, "Not enough config data!\n");
+			return -EINVAL;
 		}
-		index += (object->size + 1) * (object->instances + 1);
+
+		ret = __mxt_write_reg(data->client, object->start_address,
+				size, &pdata->config[index]);
+		if (ret)
+			return ret;
+		index += size;
 	}
 
 	return 0;