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* test: dm: Add additional GPIO testsSimon Glass2014-10-23-0/+38
| | | | | | Add tests for gpio_requestf() and for memory leaks. Signed-off-by: Simon Glass <sjg@chromium.org>
* test: dm: Support memory leak checking as a core featureSimon Glass2014-10-23-16/+32
| | | | | | | | Check the state of the malloc() heap before each test is run, so that tests can verify that all is well at the end. Provide helper functions to mark the heap and to check that it returns to its initial state. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: gpio: Add gpio_requestf() helper for printf() stringsSimon Glass2014-10-23-0/+18
| | | | | | | Add a helper which permits a printf()-style format string for the requester string. Signed-off-by: Simon Glass <sjg@chromium.org>
* test: dm: Update GPIO tests for new gpio_request() methodSimon Glass2014-10-23-22/+33
| | | | | | | Now that gpio_request() is handled by the uclass, updates the tests accordingly. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: sf: Add tests for SPI flashSimon Glass2014-10-22-1/+60
| | | | | | | | | Add a simple test for SPI that uses SPI flash. It operates by creating a SPI flash file and using the 'sf test' command to test that all operations work correctly. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: spi: Add testsSimon Glass2014-10-22-0/+130
| | | | | | | These tests use SPI flash (and the sandbox emulation) to operate. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* dm: core: Add functions for iterating through device childrenSimon Glass2014-10-22-0/+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 Glass2014-07-23-0/+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 Glass2014-07-23-0/+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 Glass2014-07-23-0/+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 Glass2014-07-23-26/+117
| | | | | | | | | | | | | | 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>
* dm: Avoid accessing uclasses before they are readySimon Glass2014-07-23-0/+14
| | | | | | Don't allow access to uclasses before they have been initialised. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Allow a device to be found by its FDT offsetSimon Glass2014-07-23-0/+30
| | | | | | | | Each device that was bound from a device tree has an node that caused it to be bound. Add functions that find and return a device based on a device tree offset. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Display the sequence number for each deviceSimon Glass2014-07-23-0/+2
| | | | | | Add this information to 'dm tree' and 'dm uclass' commands. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Introduce device sequence numberingSimon Glass2014-07-23-2/+63
| | | | | | | | | | | | | | | | | | | | | | | | | In U-Boot it is pretty common to number devices from 0 and access them on the command line using this numbering. While it may come to pass that we will move away from this numbering, the possibility seems remote at present. Given that devices within a uclass will have an implied numbering, it makes sense to build this into driver model as a core feature. The cost is fairly small in terms of code and data space. With each uclass having numbered devices we can ask for SPI port 0 or serial port 1 and receive a single device. Devices typically request a sequence number using aliases in the device tree. These are resolved when the device is probed, to deal with conflicts. Sequence numbers need not be sequential and holes are permitted. At present there is no support for sequence numbers using static platform data. It could easily be added to 'struct driver_info' if needed, but it seems better to add features as we find a use for them, and the use of -1 to mean 'no sequence' makes the default value somewhat painful. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Avoid activating devices in 'dm uclass' commandSimon Glass2014-07-23-3/+3
| | | | | | | | This command currently activates devices as it lists them. This is not desirable since it changes the system state. Fix it and avoid printing a newline if there are no devices in a uclass. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Move device display into its own functionSimon Glass2014-07-23-8/+19
| | | | | | | The device display for 'dm tree' and 'dm uclass' is mostly the same, so move it into a common function. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Allow drivers to be marked 'before relocation'Simon Glass2014-07-23-13/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | Driver model currently only operates after relocation is complete. In this state U-Boot typically has a small amount of memory available. In adding support for driver model prior to relocation we must try to use as little memory as possible. In addition, on some machines the memory has not be inited and/or the CPU is not running at full speed or the data cache is off. These can reduce execution performance, so the less initialisation that is done before relocation the better. An immediately-obvious improvement is to only initialise drivers which are actually going to be used before relocation. On many boards the only such driver is a serial UART, so this provides a very large potential benefit. Allow drivers to mark themselves as 'pre-reloc' which means that they will be initialised prior to relocation. This can be done either with a driver flag or with a 'dm,pre-reloc' device tree property. To support this, the various dm scanning function now take a 'pre_reloc_only' parameter which indicates that only drivers marked pre-reloc should be bound. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Make sure that the root device is probedSimon Glass2014-07-23-1/+1
| | | | | | | | | The root device should be probed just like any other device. The effect of this is to mark the device as activated, so that it can be removed (along with its children) if required. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
* dm: Use an explicit expect value in core testsSimon Glass2014-07-23-6/+12
| | | | | | | Rather than reusing the 'reg' property, use an explicit property for the expected ping value used in testing. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Use '*' to indicate a device is activatedSimon Glass2014-06-21-5/+6
| | | | | | | | Make both dm enumeration commands support showing whether a driver is active or not, and use a consistent indicator (an asterisk). Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
* dm: Fix printf() strings in the 'dm' commandSimon Glass2014-06-20-4/+4
| | | | | | | The values here are int, but the map_to_sysmem() call can return a long. Add a cast to deal with this. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Allow driver model tests only for sandboxSimon Glass2014-06-20-2/+11
| | | | | | | The GPIO tests require the sandbox GPIO driver, so cannot be run on other platforms. Similarly for the 'dm test' command. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Rename struct device_id to udevice_idSimon Glass2014-06-20-1/+1
| | | | | | | It is best to avoid having any occurence of 'struct device' in driver model, so rename to achieve this. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: rename device struct to udeviceHeiko Schocher2014-05-27-45/+46
| | | | | | | | | | | | using UBI and DM together leads in compiler error, as both define a "struct device", so rename "struct device" in include/dm/device.h to "struct udevice", as we use linux code (MTD/UBI/UBIFS some USB code,...) and cannot change the linux "struct device" Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Marek Vasut <marex@denx.de>
* dm: Add GPIO support and testsSimon Glass2014-03-04-0/+111
| | | | | | | | | | | | | | | | | | | | | | | | | | Add driver model support for GPIOs. Since existing GPIO drivers do not use driver model, this feature must be enabled by CONFIG_DM_GPIO. After all GPO drivers are converted over we can perhaps remove this config. Tests are provided for the sandbox implementation, and are a sufficient sanity check for basic operation. The GPIO uclass understands the concept of named banks of GPIOs, with each GPIO device providing a single bank. Within each bank the GPIOs are numbered using an offset from 0 to n-1. For example a bank named 'b' with 20 offsets will provide GPIOs named b0 to b19. Anonymous GPIO banks are also supported, and are just numbered without any prefix. Each time a GPIO driver is added to the uclass, the GPIOs are renumbered accordinging, so there is always a global GPIO numbering order. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com> Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com> Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
* dm: Add a 'dm' command for testingSimon Glass2014-03-04-0/+134
| | | | | | | | | | | This command is not required for driver model operation, but can be useful for testing. It provides simple dumps of internal data structures. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com> Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com> Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
* dm: Add basic testsSimon Glass2014-03-04-0/+1162
Add some tests of driver model functionality. Coverage includes: - basic init - binding of drivers to devices using platform_data - automatic probing of devices when referenced - availability of platform data to devices - lifecycle from bind to probe to remove to unbind - renumbering within a uclass when devices are probed/removed - calling driver-defined operations - deactivation of drivers when removed - memory leak across creation and destruction of drivers/uclasses - uclass init/destroy methods - automatic probe/remove of children/parents when needed This function is enabled for sandbox, using CONFIG_DM_TEST. Signed-off-by: Simon Glass <sjg@chromium.org>
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