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path: root/drivers/input/touchscreen/wm97xx-core.c
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Diffstat (limited to 'drivers/input/touchscreen/wm97xx-core.c')
-rw-r--r--drivers/input/touchscreen/wm97xx-core.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
index cbfef1ea7e3..6b75c9f660a 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -125,6 +125,8 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
{
int power_adc = 0, auxval;
u16 power = 0;
+ int rc = 0;
+ int timeout = 0;
/* get codec */
mutex_lock(&wm->codec_mutex);
@@ -143,7 +145,9 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
/* Turn polling mode on to read AUX ADC */
wm->pen_probably_down = 1;
- wm->codec->poll_sample(wm, adcsel, &auxval);
+
+ while (rc != RC_VALID && timeout++ < 5)
+ rc = wm->codec->poll_sample(wm, adcsel, &auxval);
if (power_adc)
wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000);
@@ -152,8 +156,15 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel)
wm->pen_probably_down = 0;
+ if (timeout >= 5) {
+ dev_err(wm->dev,
+ "timeout reading auxadc %d, disabling digitiser\n",
+ adcsel);
+ wm->codec->dig_enable(wm, false);
+ }
+
mutex_unlock(&wm->codec_mutex);
- return auxval & 0xfff;
+ return (rc == RC_VALID ? auxval & 0xfff : -EBUSY);
}
EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc);
@@ -684,8 +695,7 @@ static int wm97xx_probe(struct device *dev)
touch_reg_err:
platform_device_put(wm->touch_dev);
touch_err:
- platform_device_unregister(wm->battery_dev);
- wm->battery_dev = NULL;
+ platform_device_del(wm->battery_dev);
batt_reg_err:
platform_device_put(wm->battery_dev);
batt_err: