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iio: st_sensors: make interrupt optional 

Some sensors such as magnetometers and pressure sensors doesn't
have interrupts at all, and thus no DRDY setting applies. Make
the assignment of an interrupt optional, and do not call
st_sensors_set_drdy_int_pin() if there is no drdy (data ready)
pin specified.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Linus Walleij 2015-04-30 15:15:47 +02:00 committed by Jonathan Cameron
parent 3337c9ff17
commit d2bc431868
1 changed files with 11 additions and 1 deletions
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12
drivers/iio/common/st_sensors/st_sensors_core.c
View File

@ -245,6 +245,16 @@ static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev,
{
struct st_sensor_data *sdata = iio_priv(indio_dev);
/* Sensor does not support interrupts */
if (sdata->sensor_settings->drdy_irq.addr == 0) {
if (pdata->drdy_int_pin)
dev_info(&indio_dev->dev,
"DRDY on pin INT%d specified, but sensor "
"does not support interrupts\n",
pdata->drdy_int_pin);
return 0;
}
switch (pdata->drdy_int_pin) {
case 1:
if (sdata->sensor_settings->drdy_irq.mask_int1 == 0) {
@ -285,7 +295,7 @@ static struct st_sensors_platform_data *st_sensors_of_probe(struct device *dev,
if (!of_property_read_u32(np, "st,drdy-int-pin", &val) && (val <= 2))
pdata->drdy_int_pin = (u8) val;
else
pdata->drdy_int_pin = defdata ? defdata->drdy_int_pin : 1;
pdata->drdy_int_pin = defdata ? defdata->drdy_int_pin : 0;
return pdata;
}