This is now a very simple trigger indeed but useful in many common cases.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
#
menu "Triggers - standalone"
+config IIO_INTERRUPT_TRIGGER
+ tristate "Generic interrupt trigger"
+ help
+ Provides support for using an interrupt of any type as an IIO
+ trigger. This may be provided by a gpio driver for example.
+
+ To compile this driver as a module, choose M here: the
+ module will be called iio-trig-interrupt.
+
config IIO_SYSFS_TRIGGER
tristate "SYSFS trigger"
depends on SYSFS
# Makefile for triggers not associated with iio-devices
#
+obj-$(CONFIG_IIO_INTERRUPT_TRIGGER) += iio-trig-interrupt.o
obj-$(CONFIG_IIO_SYSFS_TRIGGER) += iio-trig-sysfs.o
--- /dev/null
+/*
+ * Industrial I/O - generic interrupt based trigger support
+ *
+ * Copyright (c) 2008-2013 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+
+
+struct iio_interrupt_trigger_info {
+ unsigned int irq;
+};
+
+static irqreturn_t iio_interrupt_trigger_poll(int irq, void *private)
+{
+ /* Timestamp not currently provided */
+ iio_trigger_poll(private, 0);
+ return IRQ_HANDLED;
+}
+
+static const struct iio_trigger_ops iio_interrupt_trigger_ops = {
+ .owner = THIS_MODULE,
+};
+
+static int iio_interrupt_trigger_probe(struct platform_device *pdev)
+{
+ struct iio_interrupt_trigger_info *trig_info;
+ struct iio_trigger *trig;
+ unsigned long irqflags;
+ struct resource *irq_res;
+ int irq, ret = 0;
+
+ irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+ if (irq_res == NULL)
+ return -ENODEV;
+
+ irqflags = (irq_res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED;
+
+ irq = irq_res->start;
+
+ trig = iio_trigger_alloc("irqtrig%d", irq_res->start);
+ if (!trig) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+
+ trig_info = kzalloc(sizeof(*trig_info), GFP_KERNEL);
+ if (!trig_info) {
+ ret = -ENOMEM;
+ goto error_put_trigger;
+ }
+ iio_trigger_set_drvdata(trig, trig_info);
+ trig_info->irq = irq;
+ trig->ops = &iio_interrupt_trigger_ops;
+ ret = request_irq(irq, iio_interrupt_trigger_poll,
+ irqflags, trig->name, trig);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "request IRQ-%d failed", irq);
+ goto error_free_trig_info;
+ }
+
+ ret = iio_trigger_register(trig);
+ if (ret)
+ goto error_release_irq;
+ platform_set_drvdata(pdev, trig);
+
+ return 0;
+
+/* First clean up the partly allocated trigger */
+error_release_irq:
+ free_irq(irq, trig);
+error_free_trig_info:
+ kfree(trig_info);
+error_put_trigger:
+ iio_trigger_put(trig);
+error_ret:
+ return ret;
+}
+
+static int iio_interrupt_trigger_remove(struct platform_device *pdev)
+{
+ struct iio_trigger *trig;
+ struct iio_interrupt_trigger_info *trig_info;
+
+ trig = platform_get_drvdata(pdev);
+ trig_info = iio_trigger_get_drvdata(trig);
+ iio_trigger_unregister(trig);
+ free_irq(trig_info->irq, trig);
+ kfree(trig_info);
+ iio_trigger_put(trig);
+
+ return 0;
+}
+
+static struct platform_driver iio_interrupt_trigger_driver = {
+ .probe = iio_interrupt_trigger_probe,
+ .remove = iio_interrupt_trigger_remove,
+ .driver = {
+ .name = "iio_interrupt_trigger",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(iio_interrupt_trigger_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Interrupt trigger for the iio subsystem");
+MODULE_LICENSE("GPL v2");
Provides support for using periodic capable real time
clocks as IIO triggers.
-config IIO_INTERRUPT_TRIGGER
- tristate "Generic interrupt trigger"
- help
- Provides support for using interrupts of various types as IIO
- triggers. These may be provided by a gpio driver for example.
-
config IIO_BFIN_TMR_TRIGGER
tristate "Blackfin TIMER trigger"
depends on BLACKFIN
#
obj-$(CONFIG_IIO_PERIODIC_RTC_TRIGGER) += iio-trig-periodic-rtc.o
-obj-$(CONFIG_IIO_INTERRUPT_TRIGGER) += iio-trig-interrupt.o
obj-$(CONFIG_IIO_BFIN_TMR_TRIGGER) += iio-trig-bfin-timer.o
+++ /dev/null
-/*
- * Industrial I/O - generic interrupt based trigger support
- *
- * Copyright (c) 2008-2013 Jonathan Cameron
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/trigger.h>
-
-
-struct iio_interrupt_trigger_info {
- unsigned int irq;
-};
-
-static irqreturn_t iio_interrupt_trigger_poll(int irq, void *private)
-{
- /* Timestamp not currently provided */
- iio_trigger_poll(private, 0);
- return IRQ_HANDLED;
-}
-
-static const struct iio_trigger_ops iio_interrupt_trigger_ops = {
- .owner = THIS_MODULE,
-};
-
-static int iio_interrupt_trigger_probe(struct platform_device *pdev)
-{
- struct iio_interrupt_trigger_info *trig_info;
- struct iio_trigger *trig;
- unsigned long irqflags;
- struct resource *irq_res;
- int irq, ret = 0;
-
- irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-
- if (irq_res == NULL)
- return -ENODEV;
-
- irqflags = (irq_res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED;
-
- irq = irq_res->start;
-
- trig = iio_trigger_alloc("irqtrig%d", irq_res->start);
- if (!trig) {
- ret = -ENOMEM;
- goto error_ret;
- }
-
- trig_info = kzalloc(sizeof(*trig_info), GFP_KERNEL);
- if (!trig_info) {
- ret = -ENOMEM;
- goto error_put_trigger;
- }
- iio_trigger_set_drvdata(trig, trig_info);
- trig_info->irq = irq;
- trig->ops = &iio_interrupt_trigger_ops;
- ret = request_irq(irq, iio_interrupt_trigger_poll,
- irqflags, trig->name, trig);
- if (ret) {
- dev_err(&pdev->dev,
- "request IRQ-%d failed", irq);
- goto error_free_trig_info;
- }
-
- ret = iio_trigger_register(trig);
- if (ret)
- goto error_release_irq;
- platform_set_drvdata(pdev, trig);
-
- return 0;
-
-/* First clean up the partly allocated trigger */
-error_release_irq:
- free_irq(irq, trig);
-error_free_trig_info:
- kfree(trig_info);
-error_put_trigger:
- iio_trigger_put(trig);
-error_ret:
- return ret;
-}
-
-static int iio_interrupt_trigger_remove(struct platform_device *pdev)
-{
- struct iio_trigger *trig;
- struct iio_interrupt_trigger_info *trig_info;
-
- trig = platform_get_drvdata(pdev);
- trig_info = iio_trigger_get_drvdata(trig);
- iio_trigger_unregister(trig);
- free_irq(trig_info->irq, trig);
- kfree(trig_info);
- iio_trigger_put(trig);
-
- return 0;
-}
-
-static struct platform_driver iio_interrupt_trigger_driver = {
- .probe = iio_interrupt_trigger_probe,
- .remove = iio_interrupt_trigger_remove,
- .driver = {
- .name = "iio_interrupt_trigger",
- .owner = THIS_MODULE,
- },
-};
-
-module_platform_driver(iio_interrupt_trigger_driver);
-
-MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
-MODULE_DESCRIPTION("Interrupt trigger for the iio subsystem");
-MODULE_LICENSE("GPL v2");
projects / deliverable / linux.git / commitdiff
