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authorOctavian Purdila <octavian.purdila@intel.com>2015-01-31 01:00:03 +0100
committerJonathan Cameron <jic23@kernel.org>2015-02-08 11:36:41 +0100
commit802a3aef30917cc20279d17fe4d0e8568d5c7814 (patch)
treed15955f47661585e23950d6d48b50418a2999c71 /drivers/iio/accel/bmc150-accel.c
parentiio: buffer: refactor buffer attributes setup (diff)
downloadlinux-802a3aef30917cc20279d17fe4d0e8568d5c7814.tar.xz
linux-802a3aef30917cc20279d17fe4d0e8568d5c7814.zip
iio: bmc150: refactor slope duration and threshold update
Move the slope duration and threshold update in a separate function to reduce code duplicate between chip init and motion interrupt setup. Also move the slope update code from the interrupt setup function to the trigger set state function so that we can later refactor the interrupt code. Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/accel/bmc150-accel.c')
-rw-r--r--drivers/iio/accel/bmc150-accel.c97
1 files changed, 47 insertions, 50 deletions
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
index 066d0c04072c..2b6b80d700e4 100644
--- a/drivers/iio/accel/bmc150-accel.c
+++ b/drivers/iio/accel/bmc150-accel.c
@@ -269,6 +269,37 @@ static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
return -EINVAL;
}
+static int bmc150_accel_update_slope(struct bmc150_accel_data *data)
+{
+ int ret, val;
+
+ ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6,
+ data->slope_thres);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_6\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_5\n");
+ return ret;
+ }
+
+ val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur;
+ ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5,
+ val);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error write reg_int_5\n");
+ return ret;
+ }
+
+ dev_dbg(&data->client->dev, "%s: %x %x\n", __func__, data->slope_thres,
+ data->slope_dur);
+
+ return ret;
+}
+
static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
{
int ret;
@@ -307,32 +338,12 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
data->range = BMC150_ACCEL_DEF_RANGE_4G;
- /* Set default slope duration */
- ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_int_5\n");
- return ret;
- }
- data->slope_dur |= BMC150_ACCEL_DEF_SLOPE_DURATION;
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_5,
- data->slope_dur);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_int_5\n");
- return ret;
- }
- dev_dbg(&data->client->dev, "slope_dur %x\n", data->slope_dur);
-
- /* Set default slope thresholds */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_6,
- BMC150_ACCEL_DEF_SLOPE_THRESHOLD);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_int_6\n");
- return ret;
- }
+ /* Set default slope duration and thresholds */
data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
- dev_dbg(&data->client->dev, "slope_thres %x\n", data->slope_thres);
+ data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
+ ret = bmc150_accel_update_slope(data);
+ if (ret < 0)
+ return ret;
/* Set default as latched interrupts */
ret = i2c_smbus_write_byte_data(data->client,
@@ -375,24 +386,6 @@ static int bmc150_accel_setup_any_motion_interrupt(
}
if (status) {
- /* Set slope duration (no of samples) */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_5,
- data->slope_dur);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error write reg_int_5\n");
- return ret;
- }
-
- /* Set slope thresholds */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_6,
- data->slope_thres);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error write reg_int_6\n");
- return ret;
- }
-
/*
* New data interrupt is always non-latched,
* which will have higher priority, so no need
@@ -732,7 +725,7 @@ static int bmc150_accel_read_event(struct iio_dev *indio_dev,
*val = data->slope_thres;
break;
case IIO_EV_INFO_PERIOD:
- *val = data->slope_dur & BMC150_ACCEL_SLOPE_DUR_MASK;
+ *val = data->slope_dur;
break;
default:
return -EINVAL;
@@ -755,11 +748,10 @@ static int bmc150_accel_write_event(struct iio_dev *indio_dev,
switch (info) {
case IIO_EV_INFO_VALUE:
- data->slope_thres = val;
+ data->slope_thres = val & 0xFF;
break;
case IIO_EV_INFO_PERIOD:
- data->slope_dur &= ~BMC150_ACCEL_SLOPE_DUR_MASK;
- data->slope_dur |= val & BMC150_ACCEL_SLOPE_DUR_MASK;
+ data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK;
break;
default:
return -EINVAL;
@@ -1056,10 +1048,15 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig,
mutex_unlock(&data->mutex);
return ret;
}
- if (data->motion_trig == trig)
- ret = bmc150_accel_setup_any_motion_interrupt(data, state);
- else
+
+ if (data->motion_trig == trig) {
+ ret = bmc150_accel_update_slope(data);
+ if (!ret)
+ ret = bmc150_accel_setup_any_motion_interrupt(data,
+ state);
+ } else {
ret = bmc150_accel_setup_new_data_interrupt(data, state);
+ }
if (ret < 0) {
bmc150_accel_set_power_state(data, false);
mutex_unlock(&data->mutex);