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path: root/drivers/iio/accel/mma9553.c
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Diffstat (limited to 'drivers/iio/accel/mma9553.c')
-rw-r--r--drivers/iio/accel/mma9553.c148
1 files changed, 59 insertions, 89 deletions
diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
index 365a109aaaef..8bfc61824fb2 100644
--- a/drivers/iio/accel/mma9553.c
+++ b/drivers/iio/accel/mma9553.c
@@ -63,8 +63,8 @@
#define MMA9553_MASK_STATUS_STEPCHG BIT(13)
#define MMA9553_MASK_STATUS_ACTCHG BIT(12)
#define MMA9553_MASK_STATUS_SUSP BIT(11)
-#define MMA9553_MASK_STATUS_ACTIVITY (BIT(10) | BIT(9) | BIT(8))
-#define MMA9553_MASK_STATUS_VERSION 0x00FF
+#define MMA9553_MASK_STATUS_ACTIVITY GENMASK(10, 8)
+#define MMA9553_MASK_STATUS_VERSION GENMASK(7, 0)
#define MMA9553_REG_STEPCNT 0x02
#define MMA9553_REG_DISTANCE 0x04
@@ -76,14 +76,15 @@
#define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
#define MMA9553_DEFAULT_GPIO_POLARITY 0
-/* Bitnum used for gpio configuration = bit number in high status byte */
-#define STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
+/* Bitnum used for GPIO configuration = bit number in high status byte */
+#define MMA9553_STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
+#define MMA9553_MAX_BITNUM MMA9553_STATUS_TO_BITNUM(BIT(16))
#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
/*
* The internal activity level must be stable for ACTTHD samples before
- * ACTIVITY is updated.The ACTIVITY variable contains the current activity
+ * ACTIVITY is updated. The ACTIVITY variable contains the current activity
* level and is updated every time a step is detected or once a second
* if there are no steps.
*/
@@ -351,11 +352,11 @@ static int mma9553_conf_gpio(struct mma9553_data *data)
* This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
*/
if (activity_enabled && ev_step_detect->enabled)
- bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
+ bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
else if (ev_step_detect->enabled)
- bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
+ bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
else if (activity_enabled)
- bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
+ bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
else /* Reset */
appid = MMA9551_APPID_NONE;
@@ -363,9 +364,12 @@ static int mma9553_conf_gpio(struct mma9553_data *data)
return 0;
/* Save initial values for activity and stepcnt */
- if (activity_enabled || ev_step_detect->enabled)
- mma9553_read_activity_stepcnt(data, &data->activity,
- &data->stepcnt);
+ if (activity_enabled || ev_step_detect->enabled) {
+ ret = mma9553_read_activity_stepcnt(data, &data->activity,
+ &data->stepcnt);
+ if (ret < 0)
+ return ret;
+ }
ret = mma9551_gpio_config(data->client,
MMA9553_DEFAULT_GPIO_PIN,
@@ -396,13 +400,13 @@ static int mma9553_init(struct mma9553_data *data)
sizeof(data->conf), (u16 *) &data->conf);
if (ret < 0) {
dev_err(&data->client->dev,
- "device is not MMA9553L: failed to read cfg regs\n");
+ "failed to read configuration registers\n");
return ret;
}
- /* Reset gpio */
- data->gpio_bitnum = -1;
+ /* Reset GPIO */
+ data->gpio_bitnum = MMA9553_MAX_BITNUM;
ret = mma9553_conf_gpio(data);
if (ret < 0)
return ret;
@@ -436,6 +440,32 @@ static int mma9553_init(struct mma9553_data *data)
return mma9551_set_device_state(data->client, true);
}
+static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
+ u16 *tmp)
+{
+ bool powered_on;
+ int ret;
+
+ /*
+ * The HW only counts steps and other dependent
+ * parameters (speed, distance, calories, activity)
+ * if power is on (from enabling an event or the
+ * step counter).
+ */
+ powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on) {
+ dev_err(&data->client->dev, "No channels enabled\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
+ reg, tmp);
+ mutex_unlock(&data->mutex);
+ return ret;
+}
+
static int mma9553_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
@@ -444,69 +474,30 @@ static int mma9553_read_raw(struct iio_dev *indio_dev,
int ret;
u16 tmp;
u8 activity;
- bool powered_on;
switch (mask) {
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_STEPS:
- /*
- * The HW only counts steps and other dependent
- * parameters (speed, distance, calories, activity)
- * if power is on (from enabling an event or the
- * step counter */
- powered_on =
- mma9553_is_any_event_enabled(data, false, 0) ||
- data->stepcnt_enabled;
- if (!powered_on) {
- dev_err(&data->client->dev,
- "No channels enabled\n");
- return -EINVAL;
- }
- mutex_lock(&data->mutex);
- ret = mma9551_read_status_word(data->client,
- MMA9551_APPID_PEDOMETER,
+ ret = mma9553_read_status_word(data,
MMA9553_REG_STEPCNT,
&tmp);
- mutex_unlock(&data->mutex);
if (ret < 0)
return ret;
*val = tmp;
return IIO_VAL_INT;
case IIO_DISTANCE:
- powered_on =
- mma9553_is_any_event_enabled(data, false, 0) ||
- data->stepcnt_enabled;
- if (!powered_on) {
- dev_err(&data->client->dev,
- "No channels enabled\n");
- return -EINVAL;
- }
- mutex_lock(&data->mutex);
- ret = mma9551_read_status_word(data->client,
- MMA9551_APPID_PEDOMETER,
+ ret = mma9553_read_status_word(data,
MMA9553_REG_DISTANCE,
&tmp);
- mutex_unlock(&data->mutex);
if (ret < 0)
return ret;
*val = tmp;
return IIO_VAL_INT;
case IIO_ACTIVITY:
- powered_on =
- mma9553_is_any_event_enabled(data, false, 0) ||
- data->stepcnt_enabled;
- if (!powered_on) {
- dev_err(&data->client->dev,
- "No channels enabled\n");
- return -EINVAL;
- }
- mutex_lock(&data->mutex);
- ret = mma9551_read_status_word(data->client,
- MMA9551_APPID_PEDOMETER,
+ ret = mma9553_read_status_word(data,
MMA9553_REG_STATUS,
&tmp);
- mutex_unlock(&data->mutex);
if (ret < 0)
return ret;
@@ -531,38 +522,17 @@ static int mma9553_read_raw(struct iio_dev *indio_dev,
case IIO_VELOCITY: /* m/h */
if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
return -EINVAL;
- powered_on =
- mma9553_is_any_event_enabled(data, false, 0) ||
- data->stepcnt_enabled;
- if (!powered_on) {
- dev_err(&data->client->dev,
- "No channels enabled\n");
- return -EINVAL;
- }
- mutex_lock(&data->mutex);
- ret = mma9551_read_status_word(data->client,
- MMA9551_APPID_PEDOMETER,
- MMA9553_REG_SPEED, &tmp);
- mutex_unlock(&data->mutex);
+ ret = mma9553_read_status_word(data,
+ MMA9553_REG_SPEED,
+ &tmp);
if (ret < 0)
return ret;
*val = tmp;
return IIO_VAL_INT;
case IIO_ENERGY: /* Cal or kcal */
- powered_on =
- mma9553_is_any_event_enabled(data, false, 0) ||
- data->stepcnt_enabled;
- if (!powered_on) {
- dev_err(&data->client->dev,
- "No channels enabled\n");
- return -EINVAL;
- }
- mutex_lock(&data->mutex);
- ret = mma9551_read_status_word(data->client,
- MMA9551_APPID_PEDOMETER,
+ ret = mma9553_read_status_word(data,
MMA9553_REG_CALORIES,
&tmp);
- mutex_unlock(&data->mutex);
if (ret < 0)
return ret;
*val = tmp;
@@ -789,7 +759,7 @@ static int mma9553_write_event_config(struct iio_dev *indio_dev,
mutex_unlock(&data->mutex);
- return ret;
+ return 0;
err_conf_gpio:
if (state) {
@@ -897,7 +867,7 @@ static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
/*
* HW expects 0 for female and 1 for male,
- * while iio index is 0 for male and 1 for female
+ * while iio index is 0 for male and 1 for female.
*/
return !gender;
}
@@ -944,11 +914,11 @@ static const struct iio_event_spec mma9553_activity_events[] = {
},
};
-static const char * const calibgender_modes[] = { "male", "female" };
+static const char * const mma9553_calibgender_modes[] = { "male", "female" };
static const struct iio_enum mma9553_calibgender_enum = {
- .items = calibgender_modes,
- .num_items = ARRAY_SIZE(calibgender_modes),
+ .items = mma9553_calibgender_modes,
+ .num_items = ARRAY_SIZE(mma9553_calibgender_modes),
.get = mma9553_get_calibgender_mode,
.set = mma9553_set_calibgender_mode,
};
@@ -1110,16 +1080,16 @@ static int mma9553_gpio_probe(struct i2c_client *client)
dev = &client->dev;
- /* data ready gpio interrupt pin */
+ /* data ready GPIO interrupt pin */
gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
if (IS_ERR(gpio)) {
- dev_err(dev, "acpi gpio get index failed\n");
+ dev_err(dev, "ACPI GPIO get index failed\n");
return PTR_ERR(gpio);
}
ret = gpiod_to_irq(gpio);
- dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
return ret;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.