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Subject[PATCH] iio: imu/mpu6050: support dual-edge IRQ
Make mpu6050 usable on platforms which provide only any-edge interrupts.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 3 ++-
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 1 +
drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 6 ++++--
3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 0686e41bb8a1..36b6a3922d15 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -1239,9 +1239,10 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
}

irq_type = irqd_get_trigger_type(desc);
+ st->irq_ignore_spurious = irq_type == (IRQF_TRIGGER_RISING|IRQF_TRIGGER_FALLING);
if (!irq_type)
irq_type = IRQF_TRIGGER_RISING;
- if (irq_type == IRQF_TRIGGER_RISING)
+ if (irq_type == IRQF_TRIGGER_RISING || st->irq_ignore_spurious)
st->irq_mask = INV_MPU6050_ACTIVE_HIGH;
else if (irq_type == IRQF_TRIGGER_FALLING)
st->irq_mask = INV_MPU6050_ACTIVE_LOW;
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
index b096e010d4ee..94ee7b18b198 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
@@ -158,6 +158,7 @@ struct inv_mpu6050_state {
struct regmap *map;
int irq;
u8 irq_mask;
+ u8 irq_ignore_spurious;
unsigned skip_samples;
s64 chip_period;
s64 it_timestamp;
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
index 10d16ec5104b..52f02de3d9b0 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
@@ -184,8 +184,10 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
goto flush_fifo;
}
if (!(int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT)) {
- dev_warn(regmap_get_device(st->map),
- "spurious interrupt with status 0x%x\n", int_status);
+ if (!st->irq_ignore_spurious)
+ dev_warn(regmap_get_device(st->map),
+ "spurious interrupt with status 0x%x\n",
+ int_status);
goto end_session;
}

--
2.20.1
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