From: Rob Herring <r.herring@freescale.com>
Date: Fri, 16 Oct 2009 19:41:52 +0000 (-0500)
Subject: tsc2007: fail registration on i2c error
X-Git-Tag: v3.0.35-fsl~2501
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7f9ee3e6babf3dcfb199dc76d17d9cf8058c20ef;p=karo-tx-linux.git

tsc2007: fail registration on i2c error

Return an error on probe if i2c errors occur indicating the device
is not present.

Signed-off-by: Rob Herring <r.herring@freescale.com>
---

diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index fadc11545b1e..da7432726c99 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -300,6 +300,13 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 	ts->get_pendown_state = pdata->get_pendown_state;
 	ts->clear_penirq      = pdata->clear_penirq;
 
+	pdata->init_platform_hw();
+
+	if (tsc2007_xfer(ts, PWRDOWN) < 0) {
+		err = -ENODEV;
+		goto err_no_dev;
+	}
+
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input0", dev_name(&client->dev));
 
@@ -344,6 +351,8 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 		pdata->exit_platform_hw();
  err_free_mem:
 	input_free_device(input_dev);
+ err_no_dev:
+	pdata->exit_platform_hw();
 	kfree(ts);
 	return err;
 }