diff options
Diffstat (limited to 'drivers/iio/accel/fxls8962af-core.c')
| -rw-r--r-- | drivers/iio/accel/fxls8962af-core.c | 349 |
1 files changed, 343 insertions, 6 deletions
diff --git a/drivers/iio/accel/fxls8962af-core.c b/drivers/iio/accel/fxls8962af-core.c index 0019f1ea7df2..32989d91b982 100644 --- a/drivers/iio/accel/fxls8962af-core.c +++ b/drivers/iio/accel/fxls8962af-core.c @@ -22,6 +22,7 @@ #include <linux/regmap.h> #include <linux/iio/buffer.h> +#include <linux/iio/events.h> #include <linux/iio/iio.h> #include <linux/iio/kfifo_buf.h> #include <linux/iio/sysfs.h> @@ -30,6 +31,7 @@ #define FXLS8962AF_INT_STATUS 0x00 #define FXLS8962AF_INT_STATUS_SRC_BOOT BIT(0) +#define FXLS8962AF_INT_STATUS_SRC_SDCD_OT BIT(4) #define FXLS8962AF_INT_STATUS_SRC_BUF BIT(5) #define FXLS8962AF_INT_STATUS_SRC_DRDY BIT(7) #define FXLS8962AF_TEMP_OUT 0x01 @@ -73,6 +75,7 @@ #define FXLS8962AF_ASLP_COUNT_LSB 0x1e #define FXLS8962AF_INT_EN 0x20 +#define FXLS8962AF_INT_EN_SDCD_OT_EN BIT(5) #define FXLS8962AF_INT_EN_BUF_EN BIT(6) #define FXLS8962AF_INT_PIN_SEL 0x21 #define FXLS8962AF_INT_PIN_SEL_MASK GENMASK(7, 0) @@ -96,9 +99,21 @@ #define FXLS8962AF_ORIENT_THS_REG 0x2c #define FXLS8962AF_SDCD_INT_SRC1 0x2d +#define FXLS8962AF_SDCD_INT_SRC1_X_OT BIT(5) +#define FXLS8962AF_SDCD_INT_SRC1_X_POL BIT(4) +#define FXLS8962AF_SDCD_INT_SRC1_Y_OT BIT(3) +#define FXLS8962AF_SDCD_INT_SRC1_Y_POL BIT(2) +#define FXLS8962AF_SDCD_INT_SRC1_Z_OT BIT(1) +#define FXLS8962AF_SDCD_INT_SRC1_Z_POL BIT(0) #define FXLS8962AF_SDCD_INT_SRC2 0x2e #define FXLS8962AF_SDCD_CONFIG1 0x2f +#define FXLS8962AF_SDCD_CONFIG1_Z_OT_EN BIT(3) +#define FXLS8962AF_SDCD_CONFIG1_Y_OT_EN BIT(4) +#define FXLS8962AF_SDCD_CONFIG1_X_OT_EN BIT(5) +#define FXLS8962AF_SDCD_CONFIG1_OT_ELE BIT(7) #define FXLS8962AF_SDCD_CONFIG2 0x30 +#define FXLS8962AF_SDCD_CONFIG2_SDCD_EN BIT(7) +#define FXLS8962AF_SC2_REF_UPDM_AC GENMASK(6, 5) #define FXLS8962AF_SDCD_OT_DBCNT 0x31 #define FXLS8962AF_SDCD_WT_DBCNT 0x32 #define FXLS8962AF_SDCD_LTHS_LSB 0x33 @@ -151,7 +166,11 @@ struct fxls8962af_data { } scan; int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */ struct iio_mount_matrix orientation; + int irq; u8 watermark; + u8 enable_event; + u16 lower_thres; + u16 upper_thres; }; const struct regmap_config fxls8962af_regmap_conf = { @@ -238,7 +257,7 @@ static int fxls8962af_get_out(struct fxls8962af_data *data, } ret = regmap_bulk_read(data->regmap, chan->address, - &raw_val, (chan->scan_type.storagebits / 8)); + &raw_val, sizeof(data->lower_thres)); if (!is_active) fxls8962af_power_off(data); @@ -451,6 +470,15 @@ static int fxls8962af_write_raw(struct iio_dev *indio_dev, } } +static int fxls8962af_event_setup(struct fxls8962af_data *data, int state) +{ + /* Enable wakeup interrupt */ + int mask = FXLS8962AF_INT_EN_SDCD_OT_EN; + int value = state ? mask : 0; + + return regmap_update_bits(data->regmap, FXLS8962AF_INT_EN, mask, value); +} + static int fxls8962af_set_watermark(struct iio_dev *indio_dev, unsigned val) { struct fxls8962af_data *data = iio_priv(indio_dev); @@ -463,6 +491,217 @@ static int fxls8962af_set_watermark(struct iio_dev *indio_dev, unsigned val) return 0; } +static int __fxls8962af_set_thresholds(struct fxls8962af_data *data, + const struct iio_chan_spec *chan, + enum iio_event_direction dir, + int val) +{ + switch (dir) { + case IIO_EV_DIR_FALLING: + data->lower_thres = val; + return regmap_bulk_write(data->regmap, FXLS8962AF_SDCD_LTHS_LSB, + &data->lower_thres, sizeof(data->lower_thres)); + case IIO_EV_DIR_RISING: + data->upper_thres = val; + return regmap_bulk_write(data->regmap, FXLS8962AF_SDCD_UTHS_LSB, + &data->upper_thres, sizeof(data->upper_thres)); + default: + return -EINVAL; + } +} + +static int fxls8962af_read_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct fxls8962af_data *data = iio_priv(indio_dev); + int ret; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + switch (dir) { + case IIO_EV_DIR_FALLING: + ret = regmap_bulk_read(data->regmap, FXLS8962AF_SDCD_LTHS_LSB, + &data->lower_thres, sizeof(data->lower_thres)); + if (ret) + return ret; + + *val = sign_extend32(data->lower_thres, chan->scan_type.realbits - 1); + return IIO_VAL_INT; + case IIO_EV_DIR_RISING: + ret = regmap_bulk_read(data->regmap, FXLS8962AF_SDCD_UTHS_LSB, + &data->upper_thres, sizeof(data->upper_thres)); + if (ret) + return ret; + + *val = sign_extend32(data->upper_thres, chan->scan_type.realbits - 1); + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int fxls8962af_write_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct fxls8962af_data *data = iio_priv(indio_dev); + int ret, val_masked; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + if (val < -2048 || val > 2047) + return -EINVAL; + + if (data->enable_event) + return -EBUSY; + + val_masked = val & GENMASK(11, 0); + if (fxls8962af_is_active(data)) { + ret = fxls8962af_standby(data); + if (ret) + return ret; + + ret = __fxls8962af_set_thresholds(data, chan, dir, val_masked); + if (ret) + return ret; + + return fxls8962af_active(data); + } else { + return __fxls8962af_set_thresholds(data, chan, dir, val_masked); + } +} + +static int +fxls8962af_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct fxls8962af_data *data = iio_priv(indio_dev); + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + switch (chan->channel2) { + case IIO_MOD_X: + return !!(FXLS8962AF_SDCD_CONFIG1_X_OT_EN & data->enable_event); + case IIO_MOD_Y: + return !!(FXLS8962AF_SDCD_CONFIG1_Y_OT_EN & data->enable_event); + case IIO_MOD_Z: + return !!(FXLS8962AF_SDCD_CONFIG1_Z_OT_EN & data->enable_event); + default: + return -EINVAL; + } +} + +static int +fxls8962af_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, int state) +{ + struct fxls8962af_data *data = iio_priv(indio_dev); + u8 enable_event, enable_bits; + int ret, value; + + if (type != IIO_EV_TYPE_THRESH) + return -EINVAL; + + switch (chan->channel2) { + case IIO_MOD_X: + enable_bits = FXLS8962AF_SDCD_CONFIG1_X_OT_EN; + break; + case IIO_MOD_Y: + enable_bits = FXLS8962AF_SDCD_CONFIG1_Y_OT_EN; + break; + case IIO_MOD_Z: + enable_bits = FXLS8962AF_SDCD_CONFIG1_Z_OT_EN; + break; + default: + return -EINVAL; + } + + if (state) + enable_event = data->enable_event | enable_bits; + else + enable_event = data->enable_event & ~enable_bits; + + if (data->enable_event == enable_event) + return 0; + + ret = fxls8962af_standby(data); + if (ret) + return ret; + + /* Enable events */ + value = enable_event | FXLS8962AF_SDCD_CONFIG1_OT_ELE; + ret = regmap_write(data->regmap, FXLS8962AF_SDCD_CONFIG1, value); + if (ret) + return ret; + + /* + * Enable update of SDCD_REF_X/Y/Z values with the current decimated and + * trimmed X/Y/Z acceleration input data. This allows for acceleration + * slope detection with Data(n) to Data(n–1) always used as the input + * to the window comparator. + */ + value = enable_event ? + FXLS8962AF_SDCD_CONFIG2_SDCD_EN | FXLS8962AF_SC2_REF_UPDM_AC : + 0x00; + ret = regmap_write(data->regmap, FXLS8962AF_SDCD_CONFIG2, value); + if (ret) + return ret; + + ret = fxls8962af_event_setup(data, state); + if (ret) + return ret; + + data->enable_event = enable_event; + + if (data->enable_event) { + fxls8962af_active(data); + ret = fxls8962af_power_on(data); + } else { + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + + /* Not in buffered mode so disable power */ + ret = fxls8962af_power_off(data); + + iio_device_release_direct_mode(indio_dev); + } + + return ret; +} + +static const struct iio_event_spec fxls8962af_event[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE), + }, +}; + #define FXLS8962AF_CHANNEL(axis, reg, idx) { \ .type = IIO_ACCEL, \ .address = reg, \ @@ -481,6 +720,8 @@ static int fxls8962af_set_watermark(struct iio_dev *indio_dev, unsigned val) .shift = 4, \ .endianness = IIO_BE, \ }, \ + .event_spec = fxls8962af_event, \ + .num_event_specs = ARRAY_SIZE(fxls8962af_event), \ } #define FXLS8962AF_TEMP_CHANNEL { \ @@ -522,6 +763,10 @@ static const struct iio_info fxls8962af_info = { .read_raw = &fxls8962af_read_raw, .write_raw = &fxls8962af_write_raw, .write_raw_get_fmt = fxls8962af_write_raw_get_fmt, + .read_event_value = fxls8962af_read_event, + .write_event_value = fxls8962af_write_event, + .read_event_config = fxls8962af_read_event_config, + .write_event_config = fxls8962af_write_event_config, .read_avail = fxls8962af_read_avail, .hwfifo_set_watermark = fxls8962af_set_watermark, }; @@ -605,7 +850,8 @@ static int fxls8962af_buffer_predisable(struct iio_dev *indio_dev) ret = __fxls8962af_fifo_set_mode(data, false); - fxls8962af_active(data); + if (data->enable_event) + fxls8962af_active(data); return ret; } @@ -614,7 +860,10 @@ static int fxls8962af_buffer_postdisable(struct iio_dev *indio_dev) { struct fxls8962af_data *data = iio_priv(indio_dev); - return fxls8962af_power_off(data); + if (!data->enable_event) + fxls8962af_power_off(data); + + return 0; } static const struct iio_buffer_setup_ops fxls8962af_buffer_ops = { @@ -725,6 +974,45 @@ static int fxls8962af_fifo_flush(struct iio_dev *indio_dev) return count; } +static int fxls8962af_event_interrupt(struct iio_dev *indio_dev) +{ + struct fxls8962af_data *data = iio_priv(indio_dev); + s64 ts = iio_get_time_ns(indio_dev); + unsigned int reg; + u64 ev_code; + int ret; + + ret = regmap_read(data->regmap, FXLS8962AF_SDCD_INT_SRC1, ®); + if (ret) + return ret; + + if (reg & FXLS8962AF_SDCD_INT_SRC1_X_OT) { + ev_code = reg & FXLS8962AF_SDCD_INT_SRC1_X_POL ? + IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING; + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X, + IIO_EV_TYPE_THRESH, ev_code), ts); + } + + if (reg & FXLS8962AF_SDCD_INT_SRC1_Y_OT) { + ev_code = reg & FXLS8962AF_SDCD_INT_SRC1_Y_POL ? + IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING; + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X, + IIO_EV_TYPE_THRESH, ev_code), ts); + } + + if (reg & FXLS8962AF_SDCD_INT_SRC1_Z_OT) { + ev_code = reg & FXLS8962AF_SDCD_INT_SRC1_Z_POL ? + IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING; + iio_push_event(indio_dev, + IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X, + IIO_EV_TYPE_THRESH, ev_code), ts); + } + + return 0; +} + static irqreturn_t fxls8962af_interrupt(int irq, void *p) { struct iio_dev *indio_dev = p; @@ -738,7 +1026,15 @@ static irqreturn_t fxls8962af_interrupt(int irq, void *p) if (reg & FXLS8962AF_INT_STATUS_SRC_BUF) { ret = fxls8962af_fifo_flush(indio_dev); - if (ret) + if (ret < 0) + return IRQ_NONE; + + return IRQ_HANDLED; + } + + if (reg & FXLS8962AF_INT_STATUS_SRC_SDCD_OT) { + ret = fxls8962af_event_interrupt(indio_dev); + if (ret < 0) return IRQ_NONE; return IRQ_HANDLED; @@ -861,6 +1157,7 @@ int fxls8962af_core_probe(struct device *dev, struct regmap *regmap, int irq) data = iio_priv(indio_dev); dev_set_drvdata(dev, indio_dev); data->regmap = regmap; + data->irq = irq; ret = iio_read_mount_matrix(dev, &data->orientation); if (ret) @@ -930,6 +1227,9 @@ int fxls8962af_core_probe(struct device *dev, struct regmap *regmap, int irq) if (ret) return ret; + if (device_property_read_bool(dev, "wakeup-source")) + device_init_wakeup(dev, true); + return devm_iio_device_register(dev, indio_dev); } EXPORT_SYMBOL_GPL(fxls8962af_core_probe); @@ -955,9 +1255,46 @@ static int __maybe_unused fxls8962af_runtime_resume(struct device *dev) return fxls8962af_active(data); } +static int __maybe_unused fxls8962af_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct fxls8962af_data *data = iio_priv(indio_dev); + + if (device_may_wakeup(dev) && data->enable_event) { + enable_irq_wake(data->irq); + + /* + * Disable buffer, as the buffer is so small the device will wake + * almost immediately. + */ + if (iio_buffer_enabled(indio_dev)) + fxls8962af_buffer_predisable(indio_dev); + } else { + fxls8962af_runtime_suspend(dev); + } + + return 0; +} + +static int __maybe_unused fxls8962af_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct fxls8962af_data *data = iio_priv(indio_dev); + + if (device_may_wakeup(dev) && data->enable_event) { + disable_irq_wake(data->irq); + + if (iio_buffer_enabled(indio_dev)) + fxls8962af_buffer_postenable(indio_dev); + } else { + fxls8962af_runtime_resume(dev); + } + + return 0; +} + const struct dev_pm_ops fxls8962af_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, - pm_runtime_force_resume) + SET_SYSTEM_SLEEP_PM_OPS(fxls8962af_suspend, fxls8962af_resume) SET_RUNTIME_PM_OPS(fxls8962af_runtime_suspend, fxls8962af_runtime_resume, NULL) }; |