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iio: mma8452: add freefall / motion interrupt source 

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.

Signed-off-by: Martin Kepplinger <martin.kepplinger@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Martin Kepplinger 2015-09-01 13:45:10 +02:00 committed by Jonathan Cameron
parent c5ea1b58e8
commit 60f562e74e
1 changed files with 36 additions and 8 deletions
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44
drivers/iio/accel/mma8452.c
View File

@ -42,6 +42,16 @@
#define MMA8452_DATA_CFG_HPF_MASK BIT(4) #define MMA8452_DATA_CFG_HPF_MASK BIT(4)
#define MMA8452_HP_FILTER_CUTOFF 0x0f #define MMA8452_HP_FILTER_CUTOFF 0x0f
#define MMA8452_HP_FILTER_CUTOFF_SEL_MASK GENMASK(1, 0) #define MMA8452_HP_FILTER_CUTOFF_SEL_MASK GENMASK(1, 0)
#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 0x1d
#define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0) #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0)
#define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1) #define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1)
@ -69,6 +79,7 @@
#define MMA8452_MAX_REG 0x31 #define MMA8452_MAX_REG 0x31
#define MMA8452_INT_DRDY BIT(0) #define MMA8452_INT_DRDY BIT(0)
#define MMA8452_INT_FF_MT BIT(2)
#define MMA8452_INT_TRANS BIT(5) #define MMA8452_INT_TRANS BIT(5)
#define MMA8452_DEVICE_ID 0x2a #define MMA8452_DEVICE_ID 0x2a
@ -613,7 +624,8 @@ static int mma8452_write_event_config(struct iio_dev *indio_dev,
else else
val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift); 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); return mma8452_change_config(data, chip->ev_cfg, val);
} }
@ -654,6 +666,7 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
{ {
struct iio_dev *indio_dev = p; struct iio_dev *indio_dev = p;
struct mma8452_data *data = iio_priv(indio_dev); struct mma8452_data *data = iio_priv(indio_dev);
const struct mma_chip_info *chip = data->chip_info;
int ret = IRQ_NONE; int ret = IRQ_NONE;
int src; int src;
@ -666,7 +679,10 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
ret = IRQ_HANDLED; 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); mma8452_transient_interrupt(indio_dev);
ret = IRQ_HANDLED; ret = IRQ_HANDLED;
} }
@ -728,6 +744,16 @@ 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 * Threshold is configured in fixed 8G/127 steps regardless of
* currently selected scale for measurement. * currently selected scale for measurement.
@ -1013,13 +1039,15 @@ static int mma8452_probe(struct i2c_client *client,
if (client->irq) { if (client->irq) {
/* /*
* Although we enable the transient interrupt source once and * Although we enable the interrupt sources once and for
* for all here the transient event detection itself is not * all here the event detection itself is not enabled until
* enabled until userspace asks for it by * userspace asks for it by mma8452_write_event_config()
* mma8452_write_event_config()
*/ */
int supported_interrupts = MMA8452_INT_DRDY | MMA8452_INT_TRANS; int supported_interrupts = MMA8452_INT_DRDY |
int enabled_interrupts = MMA8452_INT_TRANS; MMA8452_INT_TRANS |
MMA8452_INT_FF_MT;
int enabled_interrupts = MMA8452_INT_TRANS |
MMA8452_INT_FF_MT;
/* Assume wired to INT1 pin */ /* Assume wired to INT1 pin */
ret = i2c_smbus_write_byte_data(client, ret = i2c_smbus_write_byte_data(client,