mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-01 14:44:12 +00:00
iio: humidity: hdc100x: Add margin to the conversion time
commit84edec86f4
upstream. The datasheets have the following note for the conversion time specification: "This parameter is specified by design and/or characterization and it is not tested in production." Parts have been seen that require more time to do 14-bit conversions for the relative humidity channel. The result is ENXIO due to the address phase of a transfer not getting an ACK. Delay an additional 1 ms per conversion to allow for additional margin. Fixes:4839367d99
("iio: humidity: add HDC100x support") Signed-off-by: Chris Lesiak <chris.lesiak@licor.com> Acked-by: Matt Ranostay <matt.ranostay@konsulko.com> Link: https://lore.kernel.org/r/20210614141820.2034827-1-chris.lesiak@licor.com Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
da7cb80905
commit
bcac522592
1 changed files with 4 additions and 2 deletions
|
@ -24,6 +24,8 @@
|
||||||
#include <linux/iio/trigger_consumer.h>
|
#include <linux/iio/trigger_consumer.h>
|
||||||
#include <linux/iio/triggered_buffer.h>
|
#include <linux/iio/triggered_buffer.h>
|
||||||
|
|
||||||
|
#include <linux/time.h>
|
||||||
|
|
||||||
#define HDC100X_REG_TEMP 0x00
|
#define HDC100X_REG_TEMP 0x00
|
||||||
#define HDC100X_REG_HUMIDITY 0x01
|
#define HDC100X_REG_HUMIDITY 0x01
|
||||||
|
|
||||||
|
@ -165,7 +167,7 @@ static int hdc100x_get_measurement(struct hdc100x_data *data,
|
||||||
struct iio_chan_spec const *chan)
|
struct iio_chan_spec const *chan)
|
||||||
{
|
{
|
||||||
struct i2c_client *client = data->client;
|
struct i2c_client *client = data->client;
|
||||||
int delay = data->adc_int_us[chan->address];
|
int delay = data->adc_int_us[chan->address] + 1*USEC_PER_MSEC;
|
||||||
int ret;
|
int ret;
|
||||||
__be16 val;
|
__be16 val;
|
||||||
|
|
||||||
|
@ -322,7 +324,7 @@ static irqreturn_t hdc100x_trigger_handler(int irq, void *p)
|
||||||
struct iio_dev *indio_dev = pf->indio_dev;
|
struct iio_dev *indio_dev = pf->indio_dev;
|
||||||
struct hdc100x_data *data = iio_priv(indio_dev);
|
struct hdc100x_data *data = iio_priv(indio_dev);
|
||||||
struct i2c_client *client = data->client;
|
struct i2c_client *client = data->client;
|
||||||
int delay = data->adc_int_us[0] + data->adc_int_us[1];
|
int delay = data->adc_int_us[0] + data->adc_int_us[1] + 2*USEC_PER_MSEC;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
/* dual read starts at temp register */
|
/* dual read starts at temp register */
|
||||||
|
|
Loading…
Reference in a new issue