diff options
Diffstat (limited to 'drivers/iio/pressure/ms5611_core.c')
| -rw-r--r-- | drivers/iio/pressure/ms5611_core.c | 122 |
1 files changed, 110 insertions, 12 deletions
diff --git a/drivers/iio/pressure/ms5611_core.c b/drivers/iio/pressure/ms5611_core.c index 2f3d9b4aca4e..992ad8d3b67a 100644 --- a/drivers/iio/pressure/ms5611_core.c +++ b/drivers/iio/pressure/ms5611_core.c @@ -16,7 +16,11 @@ #include <linux/module.h> #include <linux/iio/iio.h> #include <linux/delay.h> +#include <linux/regulator/consumer.h> +#include <linux/iio/buffer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> #include "ms5611.h" static bool ms5611_prom_is_valid(u16 *prom, size_t len) @@ -133,17 +137,17 @@ static int ms5607_temp_and_pressure_compensate(struct ms5611_chip_info *chip_inf t = 2000 + ((chip_info->prom[6] * dt) >> 23); if (t < 2000) { - s64 off2, sens2, t2; + s64 off2, sens2, t2, tmp; t2 = (dt * dt) >> 31; - off2 = (61 * (t - 2000) * (t - 2000)) >> 4; - sens2 = off2 << 1; + tmp = (t - 2000) * (t - 2000); + off2 = (61 * tmp) >> 4; + sens2 = tmp << 1; if (t < -1500) { - s64 tmp = (t + 1500) * (t + 1500); - + tmp = (t + 1500) * (t + 1500); off2 += 15 * tmp; - sens2 += (8 * tmp); + sens2 += 8 * tmp; } t -= t2; @@ -173,6 +177,28 @@ static int ms5611_reset(struct iio_dev *indio_dev) return 0; } +static irqreturn_t ms5611_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ms5611_state *st = iio_priv(indio_dev); + s32 buf[4]; /* s32 (pressure) + s32 (temp) + 2 * s32 (timestamp) */ + int ret; + + mutex_lock(&st->lock); + ret = ms5611_read_temp_and_pressure(indio_dev, &buf[1], &buf[0]); + mutex_unlock(&st->lock); + if (ret < 0) + goto err; + + iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns()); + +err: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static int ms5611_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -201,11 +227,25 @@ static int ms5611_read_raw(struct iio_dev *indio_dev, default: return -EINVAL; } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_TEMP: + *val = 10; + return IIO_VAL_INT; + case IIO_PRESSURE: + *val = 0; + *val2 = 1000; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } } return -EINVAL; } +static const unsigned long ms5611_scan_masks[] = {0x3, 0}; + static struct ms5611_chip_info chip_info_tbl[] = { [MS5611] = { .temp_and_pressure_compensate = ms5611_temp_and_pressure_compensate, @@ -218,12 +258,29 @@ static struct ms5611_chip_info chip_info_tbl[] = { static const struct iio_chan_spec ms5611_channels[] = { { .type = IIO_PRESSURE, - .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_SCALE), + .scan_index = 0, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, { .type = IIO_TEMP, - .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), - } + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_SCALE), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(2), }; static const struct iio_info ms5611_info = { @@ -234,6 +291,18 @@ static const struct iio_info ms5611_info = { static int ms5611_init(struct iio_dev *indio_dev) { int ret; + struct regulator *vdd = devm_regulator_get(indio_dev->dev.parent, + "vdd"); + + /* Enable attached regulator if any. */ + if (!IS_ERR(vdd)) { + ret = regulator_enable(vdd); + if (ret) { + dev_err(indio_dev->dev.parent, + "failed to enable Vdd supply: %d\n", ret); + return ret; + } + } ret = ms5611_reset(indio_dev); if (ret < 0) @@ -242,7 +311,8 @@ static int ms5611_init(struct iio_dev *indio_dev) return ms5611_read_prom(indio_dev); } -int ms5611_probe(struct iio_dev *indio_dev, struct device *dev, int type) +int ms5611_probe(struct iio_dev *indio_dev, struct device *dev, + const char *name, int type) { int ret; struct ms5611_state *st = iio_priv(indio_dev); @@ -250,20 +320,48 @@ int ms5611_probe(struct iio_dev *indio_dev, struct device *dev, int type) mutex_init(&st->lock); st->chip_info = &chip_info_tbl[type]; indio_dev->dev.parent = dev; - indio_dev->name = dev->driver->name; + indio_dev->name = name; indio_dev->info = &ms5611_info; indio_dev->channels = ms5611_channels; indio_dev->num_channels = ARRAY_SIZE(ms5611_channels); indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->available_scan_masks = ms5611_scan_masks; ret = ms5611_init(indio_dev); if (ret < 0) return ret; - return devm_iio_device_register(dev, indio_dev); + ret = iio_triggered_buffer_setup(indio_dev, NULL, + ms5611_trigger_handler, NULL); + if (ret < 0) { + dev_err(dev, "iio triggered buffer setup failed\n"); + return ret; + } + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(dev, "unable to register iio device\n"); + goto err_buffer_cleanup; + } + + return 0; + +err_buffer_cleanup: + iio_triggered_buffer_cleanup(indio_dev); + + return ret; } EXPORT_SYMBOL(ms5611_probe); +int ms5611_remove(struct iio_dev *indio_dev) +{ + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + + return 0; +} +EXPORT_SYMBOL(ms5611_remove); + MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>"); MODULE_DESCRIPTION("MS5611 core driver"); MODULE_LICENSE("GPL v2"); |