linux-kernel - [PATCH 16/20] Input: atmel_mxt_ts

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1331640263-18935-17-git-send-email-djkurtz@chromium.org>
Date:	Tue, 13 Mar 2012 20:04:19 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	Iiro Valkonen <iiro.valkonen@...el.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Benson Leung <bleung@...omium.org>,
	Yufeng Shen <miletus@...omium.org>,
	Daniel Kurtz <djkurtz@...omium.org>
Subject: [PATCH 16/20] Input: atmel_mxt_ts - refactor get info

Read whole info block in one i2c transaction.
And then re-read the matrix size after applying pdata config, since
it may have changed.
Note, however, that the matrix x & y size are just displayed for
information purposes.  They aren't actually used by the driver itself.

Also, parse and info print the firmware major and minor version numbers.

Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |   63 +++++-------------------------
 1 files changed, 10 insertions(+), 53 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 0277381..1a9ed26 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -711,41 +711,6 @@ static void mxt_handle_pdata(struct mxt_data *data)
 	}
 }
 
-static int mxt_get_info(struct mxt_data *data)
-{
-	struct i2c_client *client = data->client;
-	struct mxt_info *info = &data->info;
-	int error;
-	u8 val;
-
-	error = mxt_read_reg(client, MXT_FAMILY_ID, 1, &val);
-	if (error)
-		return error;
-	info->family_id = val;
-
-	error = mxt_read_reg(client, MXT_VARIANT_ID, 1, &val);
-	if (error)
-		return error;
-	info->variant_id = val;
-
-	error = mxt_read_reg(client, MXT_VERSION, 1, &val);
-	if (error)
-		return error;
-	info->version = val;
-
-	error = mxt_read_reg(client, MXT_BUILD, 1, &val);
-	if (error)
-		return error;
-	info->build = val;
-
-	error = mxt_read_reg(client, MXT_OBJECT_NUM, 1, &val);
-	if (error)
-		return error;
-	info->object_num = val;
-
-	return 0;
-}
-
 static int mxt_get_object_table(struct mxt_data *data)
 {
 	struct i2c_client *client = data->client;
@@ -787,11 +752,11 @@ static int mxt_get_object_table(struct mxt_data *data)
 static int mxt_initialize(struct mxt_data *data)
 {
 	struct i2c_client *client = data->client;
+	struct device *dev = &client->dev;
 	struct mxt_info *info = &data->info;
 	int error;
-	u8 val;
 
-	error = mxt_get_info(data);
+	error = mxt_read_reg(client, MXT_FAMILY_ID, sizeof(*info), info);
 	if (error)
 		return error;
 
@@ -818,26 +783,18 @@ static int mxt_initialize(struct mxt_data *data)
 			MXT_COMMAND_RESET, 1);
 	msleep(MXT_RESET_TIME);
 
-	/* Update matrix size at info struct */
-	error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, 1, &val);
-	if (error)
-		return error;
-	info->matrix_xsize = val;
-
-	error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, 1, &val);
+	/* Update matrix size, since it may have been modified by pdata */
+	error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, 2,
+			     &info->matrix_xsize);
 	if (error)
 		return error;
-	info->matrix_ysize = val;
 
-	dev_info(&client->dev,
-			"Family ID: %d Variant ID: %d Version: %d Build: %d\n",
-			info->family_id, info->variant_id, info->version,
-			info->build);
+	dev_info(dev, "Family ID: %d Variant ID: %d Major.Minor.Build: %d.%d.%d\n",
+		 info->family_id, info->variant_id, info->version >> 4,
+		 info->version & 0xf, info->build);
 
-	dev_info(&client->dev,
-			"Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
-			info->matrix_xsize, info->matrix_ysize,
-			info->object_num);
+	dev_info(dev, "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
+		 info->matrix_xsize, info->matrix_ysize, info->object_num);
 
 	return 0;
 }
-- 
1.7.7.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/