diff options
Diffstat (limited to 'drivers/staging/iio/accel')
| -rw-r--r-- | drivers/staging/iio/accel/sca3000.h | 26 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/sca3000_core.c | 172 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/sca3000_ring.c | 2 |
3 files changed, 91 insertions, 109 deletions
diff --git a/drivers/staging/iio/accel/sca3000.h b/drivers/staging/iio/accel/sca3000.h index c1016c510dae..b284e5a6cac1 100644 --- a/drivers/staging/iio/accel/sca3000.h +++ b/drivers/staging/iio/accel/sca3000.h @@ -65,7 +65,8 @@ #define SCA3000_RING_BUF_ENABLE 0x80 #define SCA3000_RING_BUF_8BIT 0x40 -/* Free fall detection triggers an interrupt if the acceleration +/* + * Free fall detection triggers an interrupt if the acceleration * is below a threshold for equivalent of 25cm drop */ #define SCA3000_FREE_FALL_DETECT 0x10 @@ -73,8 +74,9 @@ #define SCA3000_MEAS_MODE_OP_1 0x01 #define SCA3000_MEAS_MODE_OP_2 0x02 -/* In motion detection mode the accelerations are band pass filtered - * (aprox 1 - 25Hz) and then a programmable threshold used to trigger +/* + * In motion detection mode the accelerations are band pass filtered + * (approx 1 - 25Hz) and then a programmable threshold used to trigger * and interrupt. */ #define SCA3000_MEAS_MODE_MOT_DET 0x03 @@ -99,8 +101,10 @@ #define SCA3000_REG_CTRL_SEL_MD_Y_TH 0x03 #define SCA3000_REG_CTRL_SEL_MD_X_TH 0x04 #define SCA3000_REG_CTRL_SEL_MD_Z_TH 0x05 -/* BE VERY CAREFUL WITH THIS, IF 3 BITS ARE NOT SET the device - will not function */ +/* + * BE VERY CAREFUL WITH THIS, IF 3 BITS ARE NOT SET the device + * will not function + */ #define SCA3000_REG_CTRL_SEL_OUT_CTRL 0x0B #define SCA3000_OUT_CTRL_PROT_MASK 0xE0 #define SCA3000_OUT_CTRL_BUF_X_EN 0x10 @@ -109,8 +113,9 @@ #define SCA3000_OUT_CTRL_BUF_DIV_4 0x02 #define SCA3000_OUT_CTRL_BUF_DIV_2 0x01 -/* Control which motion detector interrupts are on. - * For now only OR combinations are supported.x +/* + * Control which motion detector interrupts are on. + * For now only OR combinations are supported. */ #define SCA3000_MD_CTRL_PROT_MASK 0xC0 #define SCA3000_MD_CTRL_OR_Y 0x01 @@ -121,7 +126,8 @@ #define SCA3000_MD_CTRL_AND_X 0x10 #define SAC3000_MD_CTRL_AND_Z 0x20 -/* Some control registers of complex access methods requiring this register to +/* + * Some control registers of complex access methods requiring this register to * be used to remove a lock. */ #define SCA3000_REG_ADDR_UNLOCK 0x1e @@ -139,7 +145,8 @@ /* Values of multiplexed registers (write to ctrl_data after select) */ #define SCA3000_REG_ADDR_CTRL_DATA 0x22 -/* Measurement modes available on some sca3000 series chips. Code assumes others +/* + * Measurement modes available on some sca3000 series chips. Code assumes others * may become available in the future. * * Bypass - Bypass the low-pass filter in the signal channel so as to increase @@ -160,7 +167,6 @@ * struct sca3000_state - device instance state information * @us: the associated spi device * @info: chip variant information - * @indio_dev: device information used by the IIO core * @interrupt_handler_ws: event interrupt handler for all events * @last_timestamp: the timestamp of the last event * @mo_det_use_count: reference counter for the motion detection unit diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c index 7f6ccdfaf168..ed30e32e60de 100644 --- a/drivers/staging/iio/accel/sca3000_core.c +++ b/drivers/staging/iio/accel/sca3000_core.c @@ -32,7 +32,8 @@ enum sca3000_variant { e05, }; -/* Note where option modes are not defined, the chip simply does not +/* + * Note where option modes are not defined, the chip simply does not * support any. * Other chips in the sca3000 series use i2c and are not included here. * @@ -191,7 +192,6 @@ error_ret: return ret; } -/* Crucial that lock is called before calling this */ /** * sca3000_read_ctrl_reg() read from lock protected control register. * @@ -250,9 +250,8 @@ error_ret: } #endif /* SCA3000_DEBUG */ - /** - * sca3000_show_reg() - sysfs interface to read the chip revision number + * sca3000_show_rev() - sysfs interface to read the chip revision number **/ static ssize_t sca3000_show_rev(struct device *dev, struct device_attribute *attr, @@ -312,7 +311,7 @@ sca3000_show_available_measurement_modes(struct device *dev, } /** - * sca3000_show_measurmenet_mode() sysfs read of current mode + * sca3000_show_measurement_mode() sysfs read of current mode **/ static ssize_t sca3000_show_measurement_mode(struct device *dev, @@ -403,7 +402,8 @@ error_ret: } -/* Not even vaguely standard attributes so defined here rather than +/* + * Not even vaguely standard attributes so defined here rather than * in the relevant IIO core headers */ static IIO_DEVICE_ATTR(measurement_mode_available, S_IRUGO, @@ -450,6 +450,18 @@ static const struct iio_chan_spec sca3000_channels[] = { SCA3000_CHAN(2, IIO_MOD_Z), }; +static const struct iio_chan_spec sca3000_channels_with_temp[] = { + SCA3000_CHAN(0, IIO_MOD_X), + SCA3000_CHAN(1, IIO_MOD_Y), + SCA3000_CHAN(2, IIO_MOD_Z), + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + }, +}; + static u8 sca3000_addresses[3][3] = { [0] = {SCA3000_REG_ADDR_X_MSB, SCA3000_REG_CTRL_SEL_MD_X_TH, SCA3000_MD_CTRL_OR_X}, @@ -472,19 +484,30 @@ static int sca3000_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: mutex_lock(&st->lock); - if (st->mo_det_use_count) { - mutex_unlock(&st->lock); - return -EBUSY; - } - address = sca3000_addresses[chan->address][0]; - ret = sca3000_read_data_short(st, address, 2); - if (ret < 0) { - mutex_unlock(&st->lock); - return ret; + if (chan->type == IIO_ACCEL) { + if (st->mo_det_use_count) { + mutex_unlock(&st->lock); + return -EBUSY; + } + address = sca3000_addresses[chan->address][0]; + ret = sca3000_read_data_short(st, address, 2); + if (ret < 0) { + mutex_unlock(&st->lock); + return ret; + } + *val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF; + *val = ((*val) << (sizeof(*val)*8 - 13)) >> + (sizeof(*val)*8 - 13); + } else { + /* get the temperature when available */ + ret = sca3000_read_data_short(st, + SCA3000_REG_ADDR_TEMP_MSB, 2); + if (ret < 0) { + mutex_unlock(&st->lock); + return ret; + } + *val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5); } - *val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF; - *val = ((*val) << (sizeof(*val)*8 - 13)) >> - (sizeof(*val)*8 - 13); mutex_unlock(&st->lock); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: @@ -494,6 +517,10 @@ static int sca3000_read_raw(struct iio_dev *indio_dev, else /* temperature */ *val2 = 555556; return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + *val = -214; + *val2 = 600000; + return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } @@ -547,7 +574,7 @@ error_ret: return ret; } /** - * __sca3000_get_base_frequency() obtain mode specific base frequency + * __sca3000_get_base_freq() obtain mode specific base frequency * * lock must be held **/ @@ -663,7 +690,8 @@ error_free_lock: return ret ? ret : len; } -/* Should only really be registered if ring buffer support is compiled in. +/* + * Should only really be registered if ring buffer support is compiled in. * Does no harm however and doing it right would add a fair bit of complexity */ static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(sca3000_read_av_freq); @@ -672,37 +700,6 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, sca3000_read_frequency, sca3000_set_frequency); - -/** - * sca3000_read_temp() sysfs interface to get the temperature when available - * -* The alignment of data in here is downright odd. See data sheet. -* Converting this into a meaningful value is left to inline functions in -* userspace part of header. -**/ -static ssize_t sca3000_read_temp(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct sca3000_state *st = iio_priv(indio_dev); - int ret; - int val; - ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_TEMP_MSB, 2); - if (ret < 0) - goto error_ret; - val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5); - - return sprintf(buf, "%d\n", val); - -error_ret: - return ret; -} -static IIO_DEV_ATTR_TEMP_RAW(sca3000_read_temp); - -static IIO_CONST_ATTR_TEMP_SCALE("0.555556"); -static IIO_CONST_ATTR_TEMP_OFFSET("-214.6"); - /** * sca3000_read_thresh() - query of a threshold **/ @@ -782,33 +779,16 @@ static struct attribute *sca3000_attributes[] = { NULL, }; -static struct attribute *sca3000_attributes_with_temp[] = { - &iio_dev_attr_revision.dev_attr.attr, - &iio_dev_attr_measurement_mode_available.dev_attr.attr, - &iio_dev_attr_measurement_mode.dev_attr.attr, - &iio_dev_attr_sampling_frequency_available.dev_attr.attr, - &iio_dev_attr_sampling_frequency.dev_attr.attr, - /* Only present if temp sensor is */ - &iio_dev_attr_in_temp_raw.dev_attr.attr, - &iio_const_attr_in_temp_offset.dev_attr.attr, - &iio_const_attr_in_temp_scale.dev_attr.attr, - NULL, -}; - static const struct attribute_group sca3000_attribute_group = { .attrs = sca3000_attributes, }; -static const struct attribute_group sca3000_attribute_group_with_temp = { - .attrs = sca3000_attributes_with_temp, -}; - -/* RING RELATED interrupt handler */ -/* depending on event, push to the ring buffer event chrdev or the event one */ - /** * sca3000_event_handler() - handling ring and non ring events * + * Ring related interrupt handler. Depending on event, push to + * the ring buffer event chrdev or the event one. + * * This function is complicated by the fact that the devices can signify ring * and non ring events via the same interrupt line and they can only * be distinguished via a read of the relevant status register. @@ -820,7 +800,8 @@ static irqreturn_t sca3000_event_handler(int irq, void *private) int ret, val; s64 last_timestamp = iio_get_time_ns(); - /* Could lead if badly timed to an extra read of status reg, + /* + * Could lead if badly timed to an extra read of status reg, * but ensures no interrupt is missed. */ mutex_lock(&st->lock); @@ -935,7 +916,6 @@ static ssize_t sca3000_query_free_fall_mode(struct device *dev, * the device falls more than 25cm. This has not been tested due * to fragile wiring. **/ - static ssize_t sca3000_set_free_fall_mode(struct device *dev, struct device_attribute *attr, const char *buf, @@ -957,7 +937,7 @@ static ssize_t sca3000_set_free_fall_mode(struct device *dev, if (ret) goto error_ret; - /*if off and should be on*/ + /* if off and should be on */ if (val && !(st->rx[0] & protect_mask)) ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE, (st->rx[0] | SCA3000_FREE_FALL_DETECT)); @@ -972,7 +952,7 @@ error_ret: } /** - * sca3000_set_mo_det() simple on off control for motion detector + * sca3000_write_event_config() simple on off control for motion detector * * This is a per axis control, but enabling any will result in the * motion detector unit being enabled. @@ -992,13 +972,15 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev, int num = chan->channel2; mutex_lock(&st->lock); - /* First read the motion detector config to find out if - * this axis is on*/ + /* + * First read the motion detector config to find out if + * this axis is on + */ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL); if (ret < 0) goto exit_point; ctrlval = ret; - /* Off and should be on */ + /* if off and should be on */ if (state && !(ctrlval & sca3000_addresses[num][2])) { ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL, @@ -1021,7 +1003,7 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev, ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1); if (ret) goto exit_point; - /*if off and should be on*/ + /* if off and should be on */ if ((st->mo_det_use_count) && ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET)) ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE, @@ -1067,7 +1049,7 @@ static struct attribute_group sca3000_event_attribute_group = { * Devices use flash memory to store many of the register values * and hence can come up in somewhat unpredictable states. * Hence reset everything on driver load. - **/ + **/ static int sca3000_clean_setup(struct sca3000_state *st) { int ret; @@ -1107,9 +1089,11 @@ static int sca3000_clean_setup(struct sca3000_state *st) | SCA3000_INT_MASK_ACTIVE_LOW); if (ret) goto error_ret; - /* Select normal measurement mode, free fall off, ring off */ - /* Ring in 12 bit mode - it is fine to overwrite reserved bits 3,5 - * as that occurs in one of the example on the datasheet */ + /* + * Select normal measurement mode, free fall off, ring off + * Ring in 12 bit mode - it is fine to overwrite reserved bits 3,5 + * as that occurs in one of the example on the datasheet + */ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1); if (ret) goto error_ret; @@ -1133,16 +1117,6 @@ static const struct iio_info sca3000_info = { .driver_module = THIS_MODULE, }; -static const struct iio_info sca3000_info_with_temp = { - .attrs = &sca3000_attribute_group_with_temp, - .read_raw = &sca3000_read_raw, - .read_event_value = &sca3000_read_thresh, - .write_event_value = &sca3000_write_thresh, - .read_event_config = &sca3000_read_event_config, - .write_event_config = &sca3000_write_event_config, - .driver_module = THIS_MODULE, -}; - static int sca3000_probe(struct spi_device *spi) { int ret; @@ -1162,10 +1136,12 @@ static int sca3000_probe(struct spi_device *spi) indio_dev->dev.parent = &spi->dev; indio_dev->name = spi_get_device_id(spi)->name; - if (st->info->temp_output) - indio_dev->info = &sca3000_info_with_temp; - else { - indio_dev->info = &sca3000_info; + indio_dev->info = &sca3000_info; + if (st->info->temp_output) { + indio_dev->channels = sca3000_channels_with_temp; + indio_dev->num_channels = + ARRAY_SIZE(sca3000_channels_with_temp); + } else { indio_dev->channels = sca3000_channels; indio_dev->num_channels = ARRAY_SIZE(sca3000_channels); } @@ -1236,7 +1212,7 @@ static int sca3000_remove(struct spi_device *spi) struct iio_dev *indio_dev = spi_get_drvdata(spi); struct sca3000_state *st = iio_priv(indio_dev); - /* Must ensure no interrupts can be generated after this!*/ + /* Must ensure no interrupts can be generated after this! */ sca3000_stop_all_interrupts(st); if (spi->irq) free_irq(spi->irq, indio_dev); diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c index ea0af6d81d2b..198710651e0e 100644 --- a/drivers/staging/iio/accel/sca3000_ring.c +++ b/drivers/staging/iio/accel/sca3000_ring.c @@ -309,7 +309,7 @@ int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state) if (ret) goto error_ret; if (state) { - printk(KERN_INFO "supposedly enabling ring buffer\n"); + dev_info(&indio_dev->dev, "supposedly enabling ring buffer\n"); ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE, (st->rx[0] | SCA3000_RING_BUF_ENABLE)); |