This adds the freefall / motion interrupt source definitions to the driver. It is used in this series' next patch, for chips that don't support the transient interrupt source.
The iio event type is IIO_EV_TYPE_MAG since the threshold for comparison is no signed value. An interrupt occurs on positive and negative values when the magnitude crosses the threshold value. Signed-off-by: Martin Kepplinger <[email protected]> Signed-off-by: Christoph Muellner <[email protected]> --- drivers/iio/accel/mma8452.c | 45 ++++++++++++++++++++++++++++++++++++--------- 1 file changed, 36 insertions(+), 9 deletions(-) diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 57b12eb..d51ce63 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -37,9 +37,18 @@ #define MMA8452_DATA_CFG 0x0e #define MMA8452_HP_FILTER_CUTOFF 0x0f #define MMA8452_HP_FILTER_CUTOFF_SEL_MASK (BIT(0) | BIT(1)) +#define MMA8452_FF_MT_CFG 0x15 +#define MMA8452_FF_MT_CFG_OAE BIT(6) +#define MMA8452_FF_MT_CFG_ELE BIT(7) +#define MMA8452_FF_MT_SRC 0x16 +#define MMA8452_FF_MT_SRC_XHE BIT(1) +#define MMA8452_FF_MT_SRC_YHE BIT(3) +#define MMA8452_FF_MT_SRC_ZHE BIT(5) +#define MMA8452_FF_MT_THS 0x17 +#define MMA8452_FF_MT_THS_MASK 0x7f +#define MMA8452_FF_MT_COUNT 0x18 #define MMA8452_TRANSIENT_CFG 0x1d #define MMA8452_TRANSIENT_CFG_ELE BIT(4) -#define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1) #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0) #define MMA8452_TRANSIENT_SRC 0x1e #define MMA8452_TRANSIENT_SRC_XTRANSE BIT(1) @@ -73,6 +82,7 @@ #define MMA8452_DATA_CFG_HPF_MASK BIT(4) #define MMA8452_INT_DRDY BIT(0) +#define MMA8452_INT_FF_MT BIT(2) #define MMA8452_INT_TRANS BIT(5) #define MMA8452_DEVICE_ID 0x2a @@ -590,7 +600,8 @@ static int mma8452_write_event_config(struct iio_dev *indio_dev, else val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift); - val |= MMA8452_TRANSIENT_CFG_ELE; + val |= chip->ev_cfg_ele; + val |= MMA8452_FF_MT_CFG_OAE; return mma8452_change_config(data, chip->ev_cfg, val); } @@ -631,6 +642,7 @@ static irqreturn_t mma8452_interrupt(int irq, void *p) { struct iio_dev *indio_dev = p; struct mma8452_data *data = iio_priv(indio_dev); + const struct mma_chip_info *chip = data->chip_info; int ret = IRQ_NONE; int src; @@ -643,7 +655,10 @@ static irqreturn_t mma8452_interrupt(int irq, void *p) ret = IRQ_HANDLED; } - if (src & MMA8452_INT_TRANS) { + if ((src & MMA8452_INT_TRANS && + chip->ev_src == MMA8452_TRANSIENT_SRC) || + (src & MMA8452_INT_FF_MT && + chip->ev_src == MMA8452_FF_MT_SRC)) { mma8452_transient_interrupt(indio_dev); ret = IRQ_HANDLED; } @@ -704,6 +719,16 @@ static const struct iio_event_spec mma8452_transient_event[] = { }, }; +static const struct iio_event_spec mma8452_motion_event[] = { + { + .type = IIO_EV_TYPE_MAG, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_PERIOD) + }, +}; + /* * Threshold is configured in fixed 8G/127 steps regardless of * currently selected scale for measurement. @@ -987,13 +1012,15 @@ static int mma8452_probe(struct i2c_client *client, if (client->irq) { /* - * Although we enable the transient interrupt source once and - * for all here the transient event detection itself is not - * enabled until userspace asks for it by - * mma8452_write_event_config() + * Although we enable the interrupt sources once and for + * all here the event detection itself is not enabled until + * userspace asks for it by mma8452_write_event_config() */ - int supported_interrupts = MMA8452_INT_DRDY | MMA8452_INT_TRANS; - int enabled_interrupts = MMA8452_INT_TRANS; + int supported_interrupts = MMA8452_INT_DRDY | + MMA8452_INT_TRANS | + MMA8452_INT_FF_MT; + int enabled_interrupts = MMA8452_INT_TRANS | + MMA8452_INT_FF_MT; /* Assume wired to INT1 pin */ ret = i2c_smbus_write_byte_data(client, -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
