diff options
Diffstat (limited to 'Documentation/driver-api/driver-model')
| -rw-r--r-- | Documentation/driver-api/driver-model/device.rst | 4 | ||||
| -rw-r--r-- | Documentation/driver-api/driver-model/devres.rst | 14 | ||||
| -rw-r--r-- | Documentation/driver-api/driver-model/driver.rst | 32 | ||||
| -rw-r--r-- | Documentation/driver-api/driver-model/overview.rst | 2 |
4 files changed, 36 insertions, 16 deletions
diff --git a/Documentation/driver-api/driver-model/device.rst b/Documentation/driver-api/driver-model/device.rst index 2b868d49d349..b9b022371e85 100644 --- a/Documentation/driver-api/driver-model/device.rst +++ b/Documentation/driver-api/driver-model/device.rst @@ -50,10 +50,10 @@ Attributes Attributes of devices can be exported by a device driver through sysfs. -Please see Documentation/filesystems/sysfs.txt for more information +Please see Documentation/filesystems/sysfs.rst for more information on how sysfs works. -As explained in Documentation/kobject.txt, device attributes must be +As explained in Documentation/core-api/kobject.rst, device attributes must be created before the KOBJ_ADD uevent is generated. The only way to realize that is by defining an attribute group. diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst index 46c13780994c..e0b58c392e4f 100644 --- a/Documentation/driver-api/driver-model/devres.rst +++ b/Documentation/driver-api/driver-model/devres.rst @@ -284,21 +284,13 @@ I2C IIO devm_iio_device_alloc() - devm_iio_device_free() devm_iio_device_register() - devm_iio_device_unregister() devm_iio_kfifo_allocate() - devm_iio_kfifo_free() devm_iio_triggered_buffer_setup() - devm_iio_triggered_buffer_cleanup() devm_iio_trigger_alloc() - devm_iio_trigger_free() devm_iio_trigger_register() - devm_iio_trigger_unregister() devm_iio_channel_get() - devm_iio_channel_release() devm_iio_channel_get_all() - devm_iio_channel_release_all() INPUT devm_input_allocate_device() @@ -322,6 +314,7 @@ IOMAP devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device devm_platform_ioremap_resource_wc() devm_platform_ioremap_resource_byname() + devm_platform_get_and_ioremap_resource() devm_iounmap() pcim_iomap() pcim_iomap_regions() : do request_region() and iomap() on multiple BARs @@ -372,6 +365,11 @@ MUX devm_mux_chip_register() devm_mux_control_get() +NET + devm_alloc_etherdev() + devm_alloc_etherdev_mqs() + devm_register_netdev() + PER-CPU MEM devm_alloc_percpu() devm_free_percpu() diff --git a/Documentation/driver-api/driver-model/driver.rst b/Documentation/driver-api/driver-model/driver.rst index 63887b813005..7d5040f6a3d8 100644 --- a/Documentation/driver-api/driver-model/driver.rst +++ b/Documentation/driver-api/driver-model/driver.rst @@ -4,7 +4,6 @@ Device Drivers See the kerneldoc for the struct device_driver. - Allocation ~~~~~~~~~~ @@ -167,9 +166,26 @@ the driver to that device. A driver's probe() may return a negative errno value to indicate that the driver did not bind to this device, in which case it should have -released all resources it allocated:: +released all resources it allocated. + +Optionally, probe() may return -EPROBE_DEFER if the driver depends on +resources that are not yet available (e.g., supplied by a driver that +hasn't initialized yet). The driver core will put the device onto the +deferred probe list and will try to call it again later. If a driver +must defer, it should return -EPROBE_DEFER as early as possible to +reduce the amount of time spent on setup work that will need to be +unwound and reexecuted at a later time. + +.. warning:: + -EPROBE_DEFER must not be returned if probe() has already created + child devices, even if those child devices are removed again + in a cleanup path. If -EPROBE_DEFER is returned after a child + device has been registered, it may result in an infinite loop of + .probe() calls to the same driver. + +:: - void (*sync_state)(struct device *dev); + void (*sync_state) (struct device *dev); sync_state is called only once for a device. It's called when all the consumer devices of the device have successfully probed. The list of consumers of the @@ -212,6 +228,8 @@ over management of devices from the bootloader, the usage of sync_state() is not restricted to that. Use it whenever it makes sense to take an action after all the consumers of a device have probed:: +:: + int (*remove) (struct device *dev); remove is called to unbind a driver from a device. This may be @@ -224,11 +242,15 @@ not. It should free any resources allocated specifically for the device; i.e. anything in the device's driver_data field. If the device is still present, it should quiesce the device and place -it into a supported low-power state:: +it into a supported low-power state. + +:: int (*suspend) (struct device *dev, pm_message_t state); -suspend is called to put the device in a low power state:: +suspend is called to put the device in a low power state. + +:: int (*resume) (struct device *dev); diff --git a/Documentation/driver-api/driver-model/overview.rst b/Documentation/driver-api/driver-model/overview.rst index d4d1e9b40e0c..e98d0ab4a9b6 100644 --- a/Documentation/driver-api/driver-model/overview.rst +++ b/Documentation/driver-api/driver-model/overview.rst @@ -121,4 +121,4 @@ device-specific data or tunable interfaces. More information about the sysfs directory layout can be found in the other documents in this directory and in the file -Documentation/filesystems/sysfs.txt. +Documentation/filesystems/sysfs.rst. |