summaryrefslogtreecommitdiffstats
path: root/drivers/iio/imu/adis_trigger.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/iio/imu/adis_trigger.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/iio/imu/adis_trigger.c')
-rw-r--r--drivers/iio/imu/adis_trigger.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
new file mode 100644
index 000000000..f890bf842
--- /dev/null
+++ b/drivers/iio/imu/adis_trigger.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Common library for ADIS16XXX devices
+ *
+ * Copyright 2012 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/export.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/imu/adis.h>
+
+static int adis_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state)
+{
+ struct adis *adis = iio_trigger_get_drvdata(trig);
+
+ return adis_enable_irq(adis, state);
+}
+
+static const struct iio_trigger_ops adis_trigger_ops = {
+ .set_trigger_state = &adis_data_rdy_trigger_set_state,
+};
+
+static int adis_validate_irq_flag(struct adis *adis)
+{
+ unsigned long direction = adis->irq_flag & IRQF_TRIGGER_MASK;
+
+ /* We cannot mask the interrupt so ensure it's not enabled at request */
+ if (adis->data->unmasked_drdy)
+ adis->irq_flag |= IRQF_NO_AUTOEN;
+ /*
+ * Typically this devices have data ready either on the rising edge or
+ * on the falling edge of the data ready pin. This checks enforces that
+ * one of those is set in the drivers... It defaults to
+ * IRQF_TRIGGER_RISING for backward compatibility with devices that
+ * don't support changing the pin polarity.
+ */
+ if (direction == IRQF_TRIGGER_NONE) {
+ adis->irq_flag |= IRQF_TRIGGER_RISING;
+ return 0;
+ } else if (direction != IRQF_TRIGGER_RISING &&
+ direction != IRQF_TRIGGER_FALLING) {
+ dev_err(&adis->spi->dev, "Invalid IRQ mask: %08lx\n",
+ adis->irq_flag);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * devm_adis_probe_trigger() - Sets up trigger for a managed adis device
+ * @adis: The adis device
+ * @indio_dev: The IIO device
+ *
+ * Returns 0 on success or a negative error code
+ */
+int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
+{
+ int ret;
+
+ adis->trig = devm_iio_trigger_alloc(&adis->spi->dev, "%s-dev%d",
+ indio_dev->name,
+ iio_device_id(indio_dev));
+ if (!adis->trig)
+ return -ENOMEM;
+
+ adis->trig->ops = &adis_trigger_ops;
+ iio_trigger_set_drvdata(adis->trig, adis);
+
+ ret = adis_validate_irq_flag(adis);
+ if (ret)
+ return ret;
+
+ ret = devm_request_irq(&adis->spi->dev, adis->spi->irq,
+ &iio_trigger_generic_data_rdy_poll,
+ adis->irq_flag,
+ indio_dev->name,
+ adis->trig);
+ if (ret)
+ return ret;
+
+ return devm_iio_trigger_register(&adis->spi->dev, adis->trig);
+}
+EXPORT_SYMBOL_NS_GPL(devm_adis_probe_trigger, IIO_ADISLIB);
+