diff options
| author | JuenKit Yip | 2023-06-17 00:00:16 +0800 |
|---|---|---|
| committer | Guenter Roeck | 2023-06-17 09:14:39 -0700 |
| commit | af5ab550125f1bbae0ba89ed8e1994a11f40b96a (patch) | |
| tree | 7d0d3992e6c6287c27e7c267962aa9215d33d092 | |
| parent | 3d2c211c0d2b5955b4ec9a1af7d59e8bed00c7fe (diff) | |
hwmon: (sht3x) Add new non-stardard sysfs attribute
Add "repeatability" attribute to sysfs, it could be
read or written to control the sensor.
Signed-off-by: JuenKit Yip <JuenKit_Yip@hotmail.com>
Link: https://lore.kernel.org/r/DB4PR10MB6261B507C7656E3568DA33E39258A@DB4PR10MB6261.EURPRD10.PROD.OUTLOOK.COM
[groeck: Fixed multi-line alignment; dropped check of unsigned against < 0]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | Documentation/hwmon/sht3x.rst | 12 | ||||
| -rw-r--r-- | drivers/hwmon/sht3x.c | 33 |
2 files changed, 40 insertions, 5 deletions
diff --git a/Documentation/hwmon/sht3x.rst b/Documentation/hwmon/sht3x.rst index b4aa561f03ab..87864ffd1777 100644 --- a/Documentation/hwmon/sht3x.rst +++ b/Documentation/hwmon/sht3x.rst @@ -28,11 +28,6 @@ The device communicates with the I2C protocol. Sensors can have the I2C addresses 0x44 or 0x45, depending on the wiring. See Documentation/i2c/instantiating-devices.rst for methods to instantiate the device. -There is only one option configurable by means of sht3x_data: - - repeatability: high repeatability is used by default and using it is - strongly recommended. - Even if sht3x sensor supports clock-strech(blocking mode) and non-strench (non-blocking mode) in single-shot mode, this driver only supports the latter. @@ -83,4 +78,11 @@ heater_enable: heater enable, heating element removes excess humidity from update_interval: update interval, 0 for single shot, interval in msec for periodic measurement. If the interval is not supported by the sensor, the next faster interval is chosen +repeatability: write or read repeatability, higher repeatability means + longer measurement duration, lower noise level and + larger energy consumption: + + - 0: low repeatability + - 1: medium repeatability + - 2: high repeatability =================== ============================================================ diff --git a/drivers/hwmon/sht3x.c b/drivers/hwmon/sht3x.c index 111b86d9adb5..cbfb219cef2d 100644 --- a/drivers/hwmon/sht3x.c +++ b/drivers/hwmon/sht3x.c @@ -637,6 +637,37 @@ out: return count; } +static ssize_t repeatability_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct sht3x_data *data = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", data->repeatability); +} + +static ssize_t repeatability_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + int ret; + u8 val; + + struct sht3x_data *data = dev_get_drvdata(dev); + + ret = kstrtou8(buf, 0, &val); + if (ret) + return ret; + + if (val > 2) + return -EINVAL; + + data->repeatability = val; + + return count; +} + static SENSOR_DEVICE_ATTR_RO(temp1_input, temp1_input, 0); static SENSOR_DEVICE_ATTR_RO(humidity1_input, humidity1_input, 0); static SENSOR_DEVICE_ATTR_RW(temp1_max, temp1_limit, limit_max); @@ -653,6 +684,7 @@ static SENSOR_DEVICE_ATTR_RO(temp1_alarm, temp1_alarm, 0); static SENSOR_DEVICE_ATTR_RO(humidity1_alarm, humidity1_alarm, 0); static SENSOR_DEVICE_ATTR_RW(heater_enable, heater_enable, 0); static SENSOR_DEVICE_ATTR_RW(update_interval, update_interval, 0); +static SENSOR_DEVICE_ATTR_RW(repeatability, repeatability, 0); static struct attribute *sht3x_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, @@ -669,6 +701,7 @@ static struct attribute *sht3x_attrs[] = { &sensor_dev_attr_humidity1_alarm.dev_attr.attr, &sensor_dev_attr_heater_enable.dev_attr.attr, &sensor_dev_attr_update_interval.dev_attr.attr, + &sensor_dev_attr_repeatability.dev_attr.attr, NULL }; |