diff options
Diffstat (limited to 'drivers/iio/humidity')
| -rw-r--r-- | drivers/iio/humidity/dht11.c | 6 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_i2c.c | 8 |
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c index 9c47bc98f3ac..2a22ad920333 100644 --- a/drivers/iio/humidity/dht11.c +++ b/drivers/iio/humidity/dht11.c @@ -71,7 +71,8 @@ * a) select an implementation using busy loop polling on those systems * b) use the checksum to do some probabilistic decoding */ -#define DHT11_START_TRANSMISSION 18 /* ms */ +#define DHT11_START_TRANSMISSION_MIN 18000 /* us */ +#define DHT11_START_TRANSMISSION_MAX 20000 /* us */ #define DHT11_MIN_TIMERES 34000 /* ns */ #define DHT11_THRESHOLD 49000 /* ns */ #define DHT11_AMBIG_LOW 23000 /* ns */ @@ -228,7 +229,8 @@ static int dht11_read_raw(struct iio_dev *iio_dev, ret = gpio_direction_output(dht11->gpio, 0); if (ret) goto err; - msleep(DHT11_START_TRANSMISSION); + usleep_range(DHT11_START_TRANSMISSION_MIN, + DHT11_START_TRANSMISSION_MAX); ret = gpio_direction_input(dht11->gpio); if (ret) goto err; diff --git a/drivers/iio/humidity/hts221_i2c.c b/drivers/iio/humidity/hts221_i2c.c index 367ecd509f31..8333c0296c0e 100644 --- a/drivers/iio/humidity/hts221_i2c.c +++ b/drivers/iio/humidity/hts221_i2c.c @@ -10,6 +10,7 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/acpi.h> #include <linux/i2c.h> #include <linux/slab.h> #include "hts221.h" @@ -83,6 +84,12 @@ static int hts221_i2c_probe(struct i2c_client *client, return hts221_probe(iio_dev); } +static const struct acpi_device_id hts221_acpi_match[] = { + {"SMO9100", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, hts221_acpi_match); + static const struct of_device_id hts221_i2c_of_match[] = { { .compatible = "st,hts221", }, {}, @@ -99,6 +106,7 @@ static struct i2c_driver hts221_driver = { .driver = { .name = "hts221_i2c", .of_match_table = of_match_ptr(hts221_i2c_of_match), + .acpi_match_table = ACPI_PTR(hts221_acpi_match), }, .probe = hts221_i2c_probe, .id_table = hts221_i2c_id_table, |
