diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/accel/mma8452.c | 106 |
1 files changed, 68 insertions, 38 deletions
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 2d5ee4607081..85283eab2ea7 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -87,30 +87,34 @@ static int mma8452_drdy(struct mma8452_data *data) return ret; if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY) return 0; + msleep(20); } dev_err(&data->client->dev, "data not ready\n"); + return -EIO; } static int mma8452_read(struct mma8452_data *data, __be16 buf[3]) { int ret = mma8452_drdy(data); + if (ret < 0) return ret; - return i2c_smbus_read_i2c_block_data(data->client, - MMA8452_OUT_X, 3 * sizeof(__be16), (u8 *) buf); + + return i2c_smbus_read_i2c_block_data(data->client, MMA8452_OUT_X, + 3 * sizeof(__be16), (u8 *)buf); } -static ssize_t mma8452_show_int_plus_micros(char *buf, - const int (*vals)[2], int n) +static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2], + int n) { size_t len = 0; while (n-- > 0) - len += scnprintf(buf + len, PAGE_SIZE - len, - "%d.%06d ", vals[n][0], vals[n][1]); + len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", + vals[n][0], vals[n][1]); /* replace trailing space by newline */ buf[len - 1] = '\n'; @@ -119,7 +123,7 @@ static ssize_t mma8452_show_int_plus_micros(char *buf, } static int mma8452_get_int_plus_micros_index(const int (*vals)[2], int n, - int val, int val2) + int val, int val2) { while (n-- > 0) if (val == vals[n][0] && val2 == vals[n][1]) @@ -143,7 +147,7 @@ static const int mma8452_samp_freq[8][2] = { * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048 * The userspace interface uses m/s^2 and we declare micro units * So scale factor is given by: - * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665 + * g * N * 1000000 / 2048 for N = 2, 4, 8 and g = 9.80665 */ static const int mma8452_scales[3][2] = { {0, 9577}, {0, 19154}, {0, 38307} @@ -174,17 +178,19 @@ static const int mma8452_hp_filter_cutoff[8][4][2] = { }; static ssize_t mma8452_show_samp_freq_avail(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, + char *buf) { return mma8452_show_int_plus_micros(buf, mma8452_samp_freq, - ARRAY_SIZE(mma8452_samp_freq)); + ARRAY_SIZE(mma8452_samp_freq)); } static ssize_t mma8452_show_scale_avail(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, + char *buf) { return mma8452_show_int_plus_micros(buf, mma8452_scales, - ARRAY_SIZE(mma8452_scales)); + ARRAY_SIZE(mma8452_scales)); } static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev, @@ -201,22 +207,23 @@ static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev, static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mma8452_show_samp_freq_avail); static IIO_DEVICE_ATTR(in_accel_scale_available, S_IRUGO, - mma8452_show_scale_avail, NULL, 0); + mma8452_show_scale_avail, NULL, 0); static IIO_DEVICE_ATTR(in_accel_filter_high_pass_3db_frequency_available, - S_IRUGO, mma8452_show_hp_cutoff_avail, NULL, 0); + S_IRUGO, mma8452_show_hp_cutoff_avail, NULL, 0); static int mma8452_get_samp_freq_index(struct mma8452_data *data, - int val, int val2) + int val, int val2) { return mma8452_get_int_plus_micros_index(mma8452_samp_freq, - ARRAY_SIZE(mma8452_samp_freq), val, val2); + ARRAY_SIZE(mma8452_samp_freq), + val, val2); } -static int mma8452_get_scale_index(struct mma8452_data *data, - int val, int val2) +static int mma8452_get_scale_index(struct mma8452_data *data, int val, int val2) { return mma8452_get_int_plus_micros_index(mma8452_scales, - ARRAY_SIZE(mma8452_scales), val, val2); + ARRAY_SIZE(mma8452_scales), + val, val2); } static int mma8452_get_hp_filter_index(struct mma8452_data *data, @@ -262,25 +269,31 @@ static int mma8452_read_raw(struct iio_dev *indio_dev, mutex_unlock(&data->lock); if (ret < 0) return ret; - *val = sign_extend32( - be16_to_cpu(buffer[chan->scan_index]) >> 4, 11); + + *val = sign_extend32(be16_to_cpu(buffer[chan->scan_index]) >> 4, + 11); + return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK; *val = mma8452_scales[i][0]; *val2 = mma8452_scales[i][1]; + return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_SAMP_FREQ: i = mma8452_get_odr_index(data); *val = mma8452_samp_freq[i][0]; *val2 = mma8452_samp_freq[i][1]; + return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_CALIBBIAS: - ret = i2c_smbus_read_byte_data(data->client, MMA8452_OFF_X + - chan->scan_index); + ret = i2c_smbus_read_byte_data(data->client, + MMA8452_OFF_X + chan->scan_index); if (ret < 0) return ret; + *val = sign_extend32(ret, 7); + return IIO_VAL_INT; case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: if (data->data_cfg & MMA8452_DATA_CFG_HPF_MASK) { @@ -291,21 +304,23 @@ static int mma8452_read_raw(struct iio_dev *indio_dev, *val = 0; *val2 = 0; } + return IIO_VAL_INT_PLUS_MICRO; } + return -EINVAL; } static int mma8452_standby(struct mma8452_data *data) { return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, - data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE); + data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE); } static int mma8452_active(struct mma8452_data *data) { return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, - data->ctrl_reg1); + data->ctrl_reg1); } static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val) @@ -330,6 +345,7 @@ static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val) ret = 0; fail: mutex_unlock(&data->lock); + return ret; } @@ -346,6 +362,7 @@ static int mma8452_set_hp_filter_frequency(struct mma8452_data *data, MMA8452_HP_FILTER_CUTOFF); if (reg < 0) return reg; + reg &= ~MMA8452_HP_FILTER_CUTOFF_SEL_MASK; reg |= i; @@ -370,21 +387,26 @@ static int mma8452_write_raw(struct iio_dev *indio_dev, data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK; data->ctrl_reg1 |= i << MMA8452_CTRL_DR_SHIFT; + return mma8452_change_config(data, MMA8452_CTRL_REG1, - data->ctrl_reg1); + data->ctrl_reg1); case IIO_CHAN_INFO_SCALE: i = mma8452_get_scale_index(data, val, val2); if (i < 0) return i; + data->data_cfg &= ~MMA8452_DATA_CFG_FS_MASK; data->data_cfg |= i; + return mma8452_change_config(data, MMA8452_DATA_CFG, - data->data_cfg); + data->data_cfg); case IIO_CHAN_INFO_CALIBBIAS: if (val < -128 || val > 127) return -EINVAL; - return mma8452_change_config(data, MMA8452_OFF_X + - chan->scan_index, val); + + return mma8452_change_config(data, + MMA8452_OFF_X + chan->scan_index, + val); case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: if (val == 0 && val2 == 0) { @@ -395,8 +417,9 @@ static int mma8452_write_raw(struct iio_dev *indio_dev, if (ret < 0) return ret; } + return mma8452_change_config(data, MMA8452_DATA_CFG, - data->data_cfg); + data->data_cfg); default: return -EINVAL; @@ -421,6 +444,7 @@ static int mma8452_read_thresh(struct iio_dev *indio_dev, return ret; *val = ret & MMA8452_TRANSIENT_THS_MASK; + return IIO_VAL_INT; case IIO_EV_INFO_PERIOD: @@ -433,6 +457,7 @@ static int mma8452_read_thresh(struct iio_dev *indio_dev, mma8452_get_odr_index(data)]; *val = us / USEC_PER_SEC; *val2 = us % USEC_PER_SEC; + return IIO_VAL_INT_PLUS_MICRO; case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: @@ -449,6 +474,7 @@ static int mma8452_read_thresh(struct iio_dev *indio_dev, if (ret < 0) return ret; } + return IIO_VAL_INT_PLUS_MICRO; default: @@ -483,6 +509,7 @@ static int mma8452_write_thresh(struct iio_dev *indio_dev, return mma8452_change_config(data, MMA8452_TRANSIENT_COUNT, steps); + case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: reg = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_CFG); @@ -497,6 +524,7 @@ static int mma8452_write_thresh(struct iio_dev *indio_dev, if (ret < 0) return ret; } + return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, reg); default: @@ -606,15 +634,16 @@ static irqreturn_t mma8452_trigger_handler(int irq, void *p) u8 buffer[16]; /* 3 16-bit channels + padding + ts */ int ret; - ret = mma8452_read(data, (__be16 *) buffer); + ret = mma8452_read(data, (__be16 *)buffer); if (ret < 0) goto done; iio_push_to_buffers_with_timestamp(indio_dev, buffer, - iio_get_time_ns()); + iio_get_time_ns()); done: iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; } @@ -672,10 +701,10 @@ static struct attribute_group mma8452_event_attribute_group = { .modified = 1, \ .channel2 = IIO_MOD_##axis, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ - BIT(IIO_CHAN_INFO_CALIBBIAS), \ + BIT(IIO_CHAN_INFO_CALIBBIAS), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ - BIT(IIO_CHAN_INFO_SCALE) | \ - BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ + BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ .scan_index = idx, \ .scan_type = { \ .sign = 's', \ @@ -778,6 +807,7 @@ static int mma8452_trigger_setup(struct iio_dev *indio_dev) return ret; indio_dev->trig = trig; + return 0; } @@ -847,7 +877,7 @@ static int mma8452_probe(struct i2c_client *client, data->data_cfg = MMA8452_DATA_CFG_FS_2G; ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG, - data->data_cfg); + data->data_cfg); if (ret < 0) return ret; @@ -889,14 +919,14 @@ static int mma8452_probe(struct i2c_client *client, } data->ctrl_reg1 = MMA8452_CTRL_ACTIVE | - (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT); + (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT); ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, data->ctrl_reg1); if (ret < 0) goto trigger_cleanup; ret = iio_triggered_buffer_setup(indio_dev, NULL, - mma8452_trigger_handler, NULL); + mma8452_trigger_handler, NULL); if (ret < 0) goto trigger_cleanup; |