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* dm: Rename dev_get_parentdata() to dev_get_parent_priv()Simon Glass2015-10-231-13/+13
| | | | | | | | The current name is inconsistent with other driver model data access functions. Rename it and fix up all users. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
* test: Generalize the unit test frameworkJoe Hershberger2015-05-211-19/+20
| | | | | | | | | Separate the ability to define tests and assert status of test functions from the dm tests so they can be used more consistently throughout all tests. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* dm: test: bus: Use a local variable to simplify codeSimon Glass2015-04-181-6/+10
| | | | | | | Adjust this test to avoid repeating the same code too often. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: core: Allow uclass to set up a device's child before it is probedSimon Glass2015-01-291-0/+46
| | | | | | | | | Some buses need to set up their devices before they can be used. This setup may well be common to all buses in a particular uclass. Support a common pre-probe method for the uclass, called before any bus devices are probed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Allow the uclass to set up a device's child after bindingSimon Glass2015-01-291-0/+26
| | | | | | | | | | | | For buses, after a child is bound, allow the uclass to perform some processing. This can be used to figure out the address of the child (e.g. the chip select for SPI slaves) so that it is ready to be probed. This avoids bus drivers having to repeat the same process, which really should be done by the uclass, since it is common. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Allow uclasses to specify private data for a device's childrenSimon Glass2015-01-291-2/+29
| | | | | | | | | | | | | | In many cases the per-child private data for a device's children is defined by the uclass rather than the individual driver. For example, a SPI bus needs to store information about each of its children, but all SPI drivers store the same information. It makes sense to allow the uclass to define this data. If the driver provides a size value for its per-child private data, then use it. Failng that, fall back to that provided by the uclass. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Add a flag to control sequence numberingSimon Glass2015-01-291-1/+2
| | | | | | | | | | | | | | | | At present we try to use the 'reg' property and device tree aliases to give devices a sequence number. The 'reg' property is often actually a memory address, so the sequence numbers thus-obtained are not useful. It would be better if the devices were just sequentially numbered in that case. In fact neither I2C nor SPI use this feature, so drop it. Some devices need us to look up an alias to number them within the uclass. Add a flag to control this, so it is not done unless it is needed. Adjust the tests to test this new behaviour. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Add a post_bind method for parentsSimon Glass2015-01-291-0/+35
| | | | | | | | Allow parent drivers to be called when a new child is bound to them. This allows a bus to set up information it needs for that child. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Allow uclasses to specify platdata for a device's childrenSimon Glass2015-01-291-2/+30
| | | | | | | | | | | | | | In many cases the child platform data for a device's children is defined by the uclass rather than the individual devices. For example, a SPI bus needs to know the chip select and speed for each of its children. It makes sense to allow this information to be defined the SPI uclass rather than each individual driver. If the device provides a size value for its child platdata, then use it. Failng that, fall back to that provided by the uclass. Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Allow parents to have platform data for their childrenSimon Glass2015-01-291-0/+81
| | | | | | | | | | | | For buses it is common for parents to need to know the address of the child on the bus, the bus speed to use for that child, and other information. This can be provided in platform data attached to each child. Add driver model support for this, including auto-allocation which can be requested using a new property to specify the size of the data. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Add functions for iterating through device childrenSimon Glass2014-10-221-0/+31
| | | | | | | | Buses need to iterate through their children in some situations. Add a few functions to make this easy. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: Add child_pre_probe() and child_post_remove() methodsSimon Glass2014-07-231-0/+68
| | | | | | | | | | | Some devices (particularly bus devices) must track their children, knowing when a new child is added so that it can be set up for communication on the bus. Add a child_pre_probe() method to provide this feature, and a corresponding child_post_remove() method. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Introduce per-child data for devicesSimon Glass2014-07-231-0/+65
| | | | | | | | | | | | | Some device types can have child devices and want to store information about them. For example a USB flash stick attached to a USB host controller would likely use this space. The controller can hold information about the USB state of each of its children. The data is stored attached to the child device in the 'parent_priv' member. It can be auto-allocated by dm when the child is probed. To do this, add a per_child_auto_alloc_size value to the parent driver. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add functions to access a device's childrenSimon Glass2014-07-231-0/+46
| | | | | | | | | | | | | | | | | Devices can have childen that can be addressed by a simple index, the sequence number or a device tree offset. Add functions to access a child in each of these ways. The index is typically used as a fallback when the sequence number is not available. For example we may use a serial UART with sequence number 0 as the console, but if no UART has sequence number 0, then we can fall back to just using the first UART (index 0). The device tree offset function is useful for buses, where they want to locate one of their children. The device tree can be scanned to find the offset of each child, and that offset can then find the device. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Provide a function to scan child FDT nodesSimon Glass2014-07-231-0/+63
At present only root nodes in the device tree are scanned for devices. But some devices can have children. For example a SPI bus may have several children for each of its chip selects. Add a function which scans subnodes and binds devices for each one. This can be used for the root node scan also, so change it. A device can call this function in its bind() or probe() methods to bind its children. Signed-off-by: Simon Glass <sjg@chromium.org>
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