linux-kernel - [PATCH 3/5] iio: accel: adxl372: add sysfs for time registers

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Date:   Fri, 14 Feb 2020 11:29:17 +0200
From:   Alexandru Tachici <alexandru.tachici@...log.com>
To:     <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <jic23@...nel.org>
Subject: [PATCH 3/5] iio: accel: adxl372: add sysfs for time registers

Currently the driver configures adxl372 to work in loop mode.
The inactivity and activity timings  decide how fast the chip
will loop through the awake and waiting states.

This patch adds sysfs entries for the inactivity and activity
shared properties.

Signed-off-by: Alexandru Tachici <alexandru.tachici@...log.com>
---
 drivers/iio/accel/adxl372.c | 66 +++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index 538e5053a946..8bef6f2030ff 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -754,6 +754,70 @@ static IIO_DEVICE_ATTR(peak_fifo_mode_enable, 0644,
 		       adxl372_peak_fifo_en_get,
 		       adxl372_peak_fifo_en_set, 0);
 
+static ssize_t adxl372_time_activity_get(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct adxl372_state *st = iio_priv(dev_to_iio_dev(dev));
+
+	return sprintf(buf, "%d\n", st->act_time_ms);
+}
+
+static ssize_t adxl372_time_activity_set(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t len)
+{
+	struct adxl372_state *st = iio_priv(dev_to_iio_dev(dev));
+	unsigned int val;
+	int ret;
+
+	ret = kstrtouint(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	ret = adxl372_set_activity_time_ms(st, val);
+	if (ret < 0)
+		return ret;
+
+	return len;
+}
+
+static IIO_DEVICE_ATTR(time_activity, 0644,
+		       adxl372_time_activity_get,
+		       adxl372_time_activity_set, 0);
+
+static ssize_t adxl372_time_inactivity_get(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct adxl372_state *st = iio_priv(dev_to_iio_dev(dev));
+
+	return sprintf(buf, "%d\n", st->inact_time_ms);
+}
+
+static ssize_t adxl372_time_inactivity_set(struct device *dev,
+					   struct device_attribute *attr,
+					   const char *buf, size_t len)
+{
+	struct adxl372_state *st = iio_priv(dev_to_iio_dev(dev));
+	unsigned int val;
+	int ret;
+
+	ret = kstrtouint(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	ret = adxl372_set_inactivity_time_ms(st, val);
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+static IIO_DEVICE_ATTR(time_inactivity, 0644,
+		       adxl372_time_inactivity_get,
+		       adxl372_time_inactivity_set, 0);
+
 static ssize_t adxl372_show_filter_freq_avail(struct device *dev,
 					      struct device_attribute *attr,
 					      char *buf)
@@ -932,6 +996,8 @@ static struct attribute *adxl372_attributes[] = {
 	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
 	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
 	&iio_dev_attr_peak_fifo_mode_enable.dev_attr.attr,
+	&iio_dev_attr_time_inactivity.dev_attr.attr,
+	&iio_dev_attr_time_activity.dev_attr.attr,
 	NULL,
 };
 
-- 
2.20.1