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Input: ads7846 - make sure we do not change platform data 

Let's declare platform data a const pointer so that we don't accitentally
change it. Also fetch it with dev_get_platdata().

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2013-06-27 23:29:25 -07:00
parent 67bf12ca50
commit 57691a1e27
1 changed files with 5 additions and 5 deletions
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10
drivers/input/touchscreen/ads7846.c
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@ -961,9 +961,9 @@ static int ads7846_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(ads7846_pm, ads7846_suspend, ads7846_resume);
static int ads7846_setup_pendown(struct spi_device *spi,
struct ads7846 *ts)
struct ads7846 *ts,
const struct ads7846_platform_data *pdata)
{
struct ads7846_platform_data *pdata = spi->dev.platform_data;
int err;
/*
@ -1003,7 +1003,7 @@ static int ads7846_setup_pendown(struct spi_device *spi,
* use formula #2 for pressure, not #3.
*/
static void ads7846_setup_spi_msg(struct ads7846 *ts,
const struct ads7846_platform_data *pdata)
const struct ads7846_platform_data *pdata)
{
struct spi_message *m = &ts->msg[0];
struct spi_transfer *x = ts->xfer;
@ -1203,10 +1203,10 @@ static void ads7846_setup_spi_msg(struct ads7846 *ts,
static int ads7846_probe(struct spi_device *spi)
{
const struct ads7846_platform_data *pdata = dev_get_platdata(&spi->dev);
struct ads7846 *ts;
struct ads7846_packet *packet;
struct input_dev *input_dev;
struct ads7846_platform_data *pdata = spi->dev.platform_data;
unsigned long irq_flags;
int err;
@ -1281,7 +1281,7 @@ static int ads7846_probe(struct spi_device *spi)
ts->filter = ads7846_no_filter;
}
err = ads7846_setup_pendown(spi, ts);
err = ads7846_setup_pendown(spi, ts, pdata);
if (err)
goto err_cleanup_filter;