summaryrefslogtreecommitdiff
path: root/drivers/iio
diff options
context:
space:
mode:
authorLars-Peter Clausen <lars@metafoo.de>2021-03-25 16:10:46 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2021-04-07 10:36:35 +0300
commita71654af0a2199503c02e996b386d335158e0818 (patch)
tree71201b36b8b1723552c351f86b6104e36f83a276 /drivers/iio
parent0d41da0374278b00f428177502d7362f750c2bc9 (diff)
downloadlinux-a71654af0a2199503c02e996b386d335158e0818.tar.xz
iio: inv_mpu6050: Make interrupt optional
The inv_mpu6050 driver requires an interrupt for buffered capture. But non buffered reading for measurements works just fine without an interrupt connected. Make the interrupt optional to support this case. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> Link: https://lore.kernel.org/r/20210325131046.13383-2-lars@metafoo.de Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/imu/inv_mpu6050/inv_mpu_core.c51
1 files changed, 32 insertions, 19 deletions
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 99ee0a218875..cda7b48981c9 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -1458,15 +1458,21 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
st->plat_data = *pdata;
}
- desc = irq_get_irq_data(irq);
- if (!desc) {
- dev_err(dev, "Could not find IRQ %d\n", irq);
- return -EINVAL;
- }
+ if (irq > 0) {
+ desc = irq_get_irq_data(irq);
+ if (!desc) {
+ dev_err(dev, "Could not find IRQ %d\n", irq);
+ return -EINVAL;
+ }
- irq_type = irqd_get_trigger_type(desc);
- if (!irq_type)
+ irq_type = irqd_get_trigger_type(desc);
+ if (!irq_type)
+ irq_type = IRQF_TRIGGER_RISING;
+ } else {
+ /* Doesn't really matter, use the default */
irq_type = IRQF_TRIGGER_RISING;
+ }
+
if (irq_type & IRQF_TRIGGER_RISING) // rising or both-edge
st->irq_mask = INV_MPU6050_ACTIVE_HIGH;
else if (irq_type == IRQF_TRIGGER_FALLING)
@@ -1592,18 +1598,25 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
indio_dev->info = &mpu_info;
- result = devm_iio_triggered_buffer_setup(dev, indio_dev,
- iio_pollfunc_store_time,
- inv_mpu6050_read_fifo,
- NULL);
- if (result) {
- dev_err(dev, "configure buffer fail %d\n", result);
- return result;
- }
- result = inv_mpu6050_probe_trigger(indio_dev, irq_type);
- if (result) {
- dev_err(dev, "trigger probe fail %d\n", result);
- return result;
+ if (irq > 0) {
+ /*
+ * The driver currently only supports buffered capture with its
+ * own trigger. So no IRQ, no trigger, no buffer
+ */
+ result = devm_iio_triggered_buffer_setup(dev, indio_dev,
+ iio_pollfunc_store_time,
+ inv_mpu6050_read_fifo,
+ NULL);
+ if (result) {
+ dev_err(dev, "configure buffer fail %d\n", result);
+ return result;
+ }
+
+ result = inv_mpu6050_probe_trigger(indio_dev, irq_type);
+ if (result) {
+ dev_err(dev, "trigger probe fail %d\n", result);
+ return result;
+ }
}
result = devm_iio_device_register(dev, indio_dev);