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    SubjectRe: [PATCH 3/6] IIO:CORE add global list of registered IIO devices.
    On 10/18/2011 05:29 PM, Jonathan Cameron wrote:
    > Needed for inkernel interfaces.
    >

    The bus_type structure keeps a list of all devices registered on that bus, so
    you should be able to use bus_for_each_dev and bus_find_device for iterating
    over the iio devices.

    > Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
    > ---
    > drivers/iio/iio.c | 9 +++++++++
    > include/linux/iio/iio.h | 1 +
    > 2 files changed, 10 insertions(+), 0 deletions(-)
    >
    > diff --git a/drivers/iio/iio.c b/drivers/iio/iio.c
    > index 9e6acc1..246a093 100644
    > --- a/drivers/iio/iio.c
    > +++ b/drivers/iio/iio.c
    > @@ -15,6 +15,9 @@
    > #include <linux/iio/iio.h>
    > #include <linux/iio/sysfs.h>
    >
    > +static DEFINE_MUTEX(iio_device_list_lock);
    > +static LIST_HEAD(iio_device_list);
    > +
    > static DEFINE_IDA(iio_ida);
    >
    > static struct bus_type iio_bus_type = {
    > @@ -91,6 +94,9 @@ static void iio_dev_release(struct device *device)
    > {
    > struct iio_dev *indio_dev = container_of(device, struct iio_dev, dev);
    > iio_device_unregister_sysfs(indio_dev);
    > + mutex_lock(&iio_device_list_lock);
    > + list_del(&indio_dev->dev_list_entry);
    > + mutex_unlock(&iio_device_list_lock);
    > }
    >
    > static struct device_type iio_dev_type = {
    > @@ -559,6 +565,9 @@ int iio_device_register(struct iio_dev *indio_dev)
    > if (ret)
    > goto error_free_sysfs;
    >
    > + mutex_lock(&iio_device_list_lock);
    > + list_add(&indio_dev->dev_list_entry, &iio_device_list);
    > + mutex_unlock(&iio_device_list_lock);
    > return 0;
    >
    > error_free_sysfs:
    > diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
    > index beedc5c..f14e7dc 100644
    > --- a/include/linux/iio/iio.h
    > +++ b/include/linux/iio/iio.h
    > @@ -192,6 +192,7 @@ struct iio_info {
    > * @info: [DRIVER] callbacks and constant info from driver
    > * @groups: [INTERN] attribute groups
    > * @groupcounter: [INTERN] index of next attribute group
    > + * @dev_list_entry: [INTERN] entry in global list of iio devices
    > **/
    > struct iio_dev {
    > int id;



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