From: Jonathan Cameron Date: Sun, 14 Apr 2013 11:54:00 +0000 (+0100) Subject: iio:trigger:sysfs Move out of staging. X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e64e7d5c8c86ead27ed51a95687ba8327a9c4d2a;p=openwrt%2Fstaging%2Fblogic.git iio:trigger:sysfs Move out of staging. This simple driver is rather useful. No issues about its interface have been raised for some time hence the proposal to move it out of staging. Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index b2f963be3993..daa3dddbc77f 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -70,5 +70,8 @@ source "drivers/iio/gyro/Kconfig" source "drivers/iio/imu/Kconfig" source "drivers/iio/light/Kconfig" source "drivers/iio/magnetometer/Kconfig" +if IIO_TRIGGER + source "drivers/iio/trigger/Kconfig" +endif #IIO_TRIGGER endif # IIO diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index a0e8cdd67e4d..a349a9605d1f 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -21,3 +21,4 @@ obj-y += frequency/ obj-y += imu/ obj-y += light/ obj-y += magnetometer/ +obj-y += trigger/ diff --git a/drivers/iio/trigger/Kconfig b/drivers/iio/trigger/Kconfig new file mode 100644 index 000000000000..a4e68db2f23f --- /dev/null +++ b/drivers/iio/trigger/Kconfig @@ -0,0 +1,17 @@ +# +# Industrial I/O standalone triggers +# +menu "Triggers - standalone" + +config IIO_SYSFS_TRIGGER + tristate "SYSFS trigger" + depends on SYSFS + select IRQ_WORK + help + Provides support for using SYSFS entry as IIO triggers. + If unsure, say N (but it's safe to say "Y"). + + To compile this driver as a module, choose M here: the + module will be called iio-trig-sysfs. + +endmenu diff --git a/drivers/iio/trigger/Makefile b/drivers/iio/trigger/Makefile new file mode 100644 index 000000000000..e0b21831072f --- /dev/null +++ b/drivers/iio/trigger/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for triggers not associated with iio-devices +# + +obj-$(CONFIG_IIO_SYSFS_TRIGGER) += iio-trig-sysfs.o diff --git a/drivers/iio/trigger/iio-trig-sysfs.c b/drivers/iio/trigger/iio-trig-sysfs.c new file mode 100644 index 000000000000..b727bde8b7fe --- /dev/null +++ b/drivers/iio/trigger/iio-trig-sysfs.c @@ -0,0 +1,227 @@ +/* + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + * + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +struct iio_sysfs_trig { + struct iio_trigger *trig; + struct irq_work work; + int id; + struct list_head l; +}; + +static LIST_HEAD(iio_sysfs_trig_list); +static DEFINE_MUTEX(iio_syfs_trig_list_mut); + +static int iio_sysfs_trigger_probe(int id); +static ssize_t iio_sysfs_trig_add(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + int ret; + unsigned long input; + + ret = strict_strtoul(buf, 10, &input); + if (ret) + return ret; + ret = iio_sysfs_trigger_probe(input); + if (ret) + return ret; + return len; +} +static DEVICE_ATTR(add_trigger, S_IWUSR, NULL, &iio_sysfs_trig_add); + +static int iio_sysfs_trigger_remove(int id); +static ssize_t iio_sysfs_trig_remove(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + int ret; + unsigned long input; + + ret = strict_strtoul(buf, 10, &input); + if (ret) + return ret; + ret = iio_sysfs_trigger_remove(input); + if (ret) + return ret; + return len; +} + +static DEVICE_ATTR(remove_trigger, S_IWUSR, NULL, &iio_sysfs_trig_remove); + +static struct attribute *iio_sysfs_trig_attrs[] = { + &dev_attr_add_trigger.attr, + &dev_attr_remove_trigger.attr, + NULL, +}; + +static const struct attribute_group iio_sysfs_trig_group = { + .attrs = iio_sysfs_trig_attrs, +}; + +static const struct attribute_group *iio_sysfs_trig_groups[] = { + &iio_sysfs_trig_group, + NULL +}; + + +/* Nothing to actually do upon release */ +static void iio_trigger_sysfs_release(struct device *dev) +{ +} + +static struct device iio_sysfs_trig_dev = { + .bus = &iio_bus_type, + .groups = iio_sysfs_trig_groups, + .release = &iio_trigger_sysfs_release, +}; + +static void iio_sysfs_trigger_work(struct irq_work *work) +{ + struct iio_sysfs_trig *trig = container_of(work, struct iio_sysfs_trig, + work); + + iio_trigger_poll(trig->trig, 0); +} + +static ssize_t iio_sysfs_trigger_poll(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct iio_trigger *trig = to_iio_trigger(dev); + struct iio_sysfs_trig *sysfs_trig = iio_trigger_get_drvdata(trig); + + irq_work_queue(&sysfs_trig->work); + + return count; +} + +static DEVICE_ATTR(trigger_now, S_IWUSR, NULL, iio_sysfs_trigger_poll); + +static struct attribute *iio_sysfs_trigger_attrs[] = { + &dev_attr_trigger_now.attr, + NULL, +}; + +static const struct attribute_group iio_sysfs_trigger_attr_group = { + .attrs = iio_sysfs_trigger_attrs, +}; + +static const struct attribute_group *iio_sysfs_trigger_attr_groups[] = { + &iio_sysfs_trigger_attr_group, + NULL +}; + +static const struct iio_trigger_ops iio_sysfs_trigger_ops = { + .owner = THIS_MODULE, +}; + +static int iio_sysfs_trigger_probe(int id) +{ + struct iio_sysfs_trig *t; + int ret; + bool foundit = false; + mutex_lock(&iio_syfs_trig_list_mut); + list_for_each_entry(t, &iio_sysfs_trig_list, l) + if (id == t->id) { + foundit = true; + break; + } + if (foundit) { + ret = -EINVAL; + goto out1; + } + t = kmalloc(sizeof(*t), GFP_KERNEL); + if (t == NULL) { + ret = -ENOMEM; + goto out1; + } + t->id = id; + t->trig = iio_trigger_alloc("sysfstrig%d", id); + if (!t->trig) { + ret = -ENOMEM; + goto free_t; + } + + t->trig->dev.groups = iio_sysfs_trigger_attr_groups; + t->trig->ops = &iio_sysfs_trigger_ops; + t->trig->dev.parent = &iio_sysfs_trig_dev; + iio_trigger_set_drvdata(t->trig, t); + + init_irq_work(&t->work, iio_sysfs_trigger_work); + + ret = iio_trigger_register(t->trig); + if (ret) + goto out2; + list_add(&t->l, &iio_sysfs_trig_list); + __module_get(THIS_MODULE); + mutex_unlock(&iio_syfs_trig_list_mut); + return 0; + +out2: + iio_trigger_put(t->trig); +free_t: + kfree(t); +out1: + mutex_unlock(&iio_syfs_trig_list_mut); + return ret; +} + +static int iio_sysfs_trigger_remove(int id) +{ + bool foundit = false; + struct iio_sysfs_trig *t; + mutex_lock(&iio_syfs_trig_list_mut); + list_for_each_entry(t, &iio_sysfs_trig_list, l) + if (id == t->id) { + foundit = true; + break; + } + if (!foundit) { + mutex_unlock(&iio_syfs_trig_list_mut); + return -EINVAL; + } + + iio_trigger_unregister(t->trig); + iio_trigger_free(t->trig); + + list_del(&t->l); + kfree(t); + module_put(THIS_MODULE); + mutex_unlock(&iio_syfs_trig_list_mut); + return 0; +} + + +static int __init iio_sysfs_trig_init(void) +{ + device_initialize(&iio_sysfs_trig_dev); + dev_set_name(&iio_sysfs_trig_dev, "iio_sysfs_trigger"); + return device_add(&iio_sysfs_trig_dev); +} +module_init(iio_sysfs_trig_init); + +static void __exit iio_sysfs_trig_exit(void) +{ + device_unregister(&iio_sysfs_trig_dev); +} +module_exit(iio_sysfs_trig_exit); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Sysfs based trigger for the iio subsystem"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:iio-trig-sysfs"); diff --git a/drivers/staging/iio/trigger/Kconfig b/drivers/staging/iio/trigger/Kconfig index 1a051da62505..ae9fcd3382ea 100644 --- a/drivers/staging/iio/trigger/Kconfig +++ b/drivers/staging/iio/trigger/Kconfig @@ -18,17 +18,6 @@ config IIO_GPIO_TRIGGER help Provides support for using GPIO pins as IIO triggers. -config IIO_SYSFS_TRIGGER - tristate "SYSFS trigger" - depends on SYSFS - select IRQ_WORK - help - Provides support for using SYSFS entry as IIO triggers. - If unsure, say N (but it's safe to say "Y"). - - To compile this driver as a module, choose M here: the - module will be called iio-trig-sysfs. - config IIO_BFIN_TMR_TRIGGER tristate "Blackfin TIMER trigger" depends on BLACKFIN diff --git a/drivers/staging/iio/trigger/Makefile b/drivers/staging/iio/trigger/Makefile index b088b57da335..8a5304153b5b 100644 --- a/drivers/staging/iio/trigger/Makefile +++ b/drivers/staging/iio/trigger/Makefile @@ -4,5 +4,4 @@ obj-$(CONFIG_IIO_PERIODIC_RTC_TRIGGER) += iio-trig-periodic-rtc.o obj-$(CONFIG_IIO_GPIO_TRIGGER) += iio-trig-gpio.o -obj-$(CONFIG_IIO_SYSFS_TRIGGER) += iio-trig-sysfs.o obj-$(CONFIG_IIO_BFIN_TMR_TRIGGER) += iio-trig-bfin-timer.o diff --git a/drivers/staging/iio/trigger/iio-trig-sysfs.c b/drivers/staging/iio/trigger/iio-trig-sysfs.c deleted file mode 100644 index b727bde8b7fe..000000000000 --- a/drivers/staging/iio/trigger/iio-trig-sysfs.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * Copyright 2011 Analog Devices Inc. - * - * Licensed under the GPL-2. - * - */ - -#include -#include -#include -#include -#include -#include - -#include -#include - -struct iio_sysfs_trig { - struct iio_trigger *trig; - struct irq_work work; - int id; - struct list_head l; -}; - -static LIST_HEAD(iio_sysfs_trig_list); -static DEFINE_MUTEX(iio_syfs_trig_list_mut); - -static int iio_sysfs_trigger_probe(int id); -static ssize_t iio_sysfs_trig_add(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - int ret; - unsigned long input; - - ret = strict_strtoul(buf, 10, &input); - if (ret) - return ret; - ret = iio_sysfs_trigger_probe(input); - if (ret) - return ret; - return len; -} -static DEVICE_ATTR(add_trigger, S_IWUSR, NULL, &iio_sysfs_trig_add); - -static int iio_sysfs_trigger_remove(int id); -static ssize_t iio_sysfs_trig_remove(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - int ret; - unsigned long input; - - ret = strict_strtoul(buf, 10, &input); - if (ret) - return ret; - ret = iio_sysfs_trigger_remove(input); - if (ret) - return ret; - return len; -} - -static DEVICE_ATTR(remove_trigger, S_IWUSR, NULL, &iio_sysfs_trig_remove); - -static struct attribute *iio_sysfs_trig_attrs[] = { - &dev_attr_add_trigger.attr, - &dev_attr_remove_trigger.attr, - NULL, -}; - -static const struct attribute_group iio_sysfs_trig_group = { - .attrs = iio_sysfs_trig_attrs, -}; - -static const struct attribute_group *iio_sysfs_trig_groups[] = { - &iio_sysfs_trig_group, - NULL -}; - - -/* Nothing to actually do upon release */ -static void iio_trigger_sysfs_release(struct device *dev) -{ -} - -static struct device iio_sysfs_trig_dev = { - .bus = &iio_bus_type, - .groups = iio_sysfs_trig_groups, - .release = &iio_trigger_sysfs_release, -}; - -static void iio_sysfs_trigger_work(struct irq_work *work) -{ - struct iio_sysfs_trig *trig = container_of(work, struct iio_sysfs_trig, - work); - - iio_trigger_poll(trig->trig, 0); -} - -static ssize_t iio_sysfs_trigger_poll(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct iio_trigger *trig = to_iio_trigger(dev); - struct iio_sysfs_trig *sysfs_trig = iio_trigger_get_drvdata(trig); - - irq_work_queue(&sysfs_trig->work); - - return count; -} - -static DEVICE_ATTR(trigger_now, S_IWUSR, NULL, iio_sysfs_trigger_poll); - -static struct attribute *iio_sysfs_trigger_attrs[] = { - &dev_attr_trigger_now.attr, - NULL, -}; - -static const struct attribute_group iio_sysfs_trigger_attr_group = { - .attrs = iio_sysfs_trigger_attrs, -}; - -static const struct attribute_group *iio_sysfs_trigger_attr_groups[] = { - &iio_sysfs_trigger_attr_group, - NULL -}; - -static const struct iio_trigger_ops iio_sysfs_trigger_ops = { - .owner = THIS_MODULE, -}; - -static int iio_sysfs_trigger_probe(int id) -{ - struct iio_sysfs_trig *t; - int ret; - bool foundit = false; - mutex_lock(&iio_syfs_trig_list_mut); - list_for_each_entry(t, &iio_sysfs_trig_list, l) - if (id == t->id) { - foundit = true; - break; - } - if (foundit) { - ret = -EINVAL; - goto out1; - } - t = kmalloc(sizeof(*t), GFP_KERNEL); - if (t == NULL) { - ret = -ENOMEM; - goto out1; - } - t->id = id; - t->trig = iio_trigger_alloc("sysfstrig%d", id); - if (!t->trig) { - ret = -ENOMEM; - goto free_t; - } - - t->trig->dev.groups = iio_sysfs_trigger_attr_groups; - t->trig->ops = &iio_sysfs_trigger_ops; - t->trig->dev.parent = &iio_sysfs_trig_dev; - iio_trigger_set_drvdata(t->trig, t); - - init_irq_work(&t->work, iio_sysfs_trigger_work); - - ret = iio_trigger_register(t->trig); - if (ret) - goto out2; - list_add(&t->l, &iio_sysfs_trig_list); - __module_get(THIS_MODULE); - mutex_unlock(&iio_syfs_trig_list_mut); - return 0; - -out2: - iio_trigger_put(t->trig); -free_t: - kfree(t); -out1: - mutex_unlock(&iio_syfs_trig_list_mut); - return ret; -} - -static int iio_sysfs_trigger_remove(int id) -{ - bool foundit = false; - struct iio_sysfs_trig *t; - mutex_lock(&iio_syfs_trig_list_mut); - list_for_each_entry(t, &iio_sysfs_trig_list, l) - if (id == t->id) { - foundit = true; - break; - } - if (!foundit) { - mutex_unlock(&iio_syfs_trig_list_mut); - return -EINVAL; - } - - iio_trigger_unregister(t->trig); - iio_trigger_free(t->trig); - - list_del(&t->l); - kfree(t); - module_put(THIS_MODULE); - mutex_unlock(&iio_syfs_trig_list_mut); - return 0; -} - - -static int __init iio_sysfs_trig_init(void) -{ - device_initialize(&iio_sysfs_trig_dev); - dev_set_name(&iio_sysfs_trig_dev, "iio_sysfs_trigger"); - return device_add(&iio_sysfs_trig_dev); -} -module_init(iio_sysfs_trig_init); - -static void __exit iio_sysfs_trig_exit(void) -{ - device_unregister(&iio_sysfs_trig_dev); -} -module_exit(iio_sysfs_trig_exit); - -MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Sysfs based trigger for the iio subsystem"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:iio-trig-sysfs");