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* dm: core: Add a function to bind a driver for a device tree nodeSimon Glass2015-04-29-1/+8
| | | | | | | | Some device tree nodes do not have compatible strings but do require drivers. This is pretty rare, and somewhat unfortunate. Add a function to permit creation of a driver for any device tree node. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Correct bug introduced in uclass_first/next_device()Simon Glass2015-04-28-0/+5
| | | | | | | | | | | | | | These functions now rely on uclass_find_first/next_device() and assume that they will either return failure (-ve error code) or a device. In fact, coming to the end of a list is not considered failure and they return 0 in that case. The logic to deal with this was replaced in commit acb9ca2a with just using uclass_get_device_tail(). Add back the missing logic. This bug was caught by unit tests but since they were broken for other reasons at the time, this was not noticed. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: drop device removal error path correctlyMasahiro Yamada2015-04-28-3/+3
| | | | | | | | Trivial bug fix for commit 5a87c4174d18 (dm: core: Drop device removal error path when not supported). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: Select device tree control correctly for SPLSimon Glass2015-04-23-6/+8
| | | | | | | Some boards will not use device tree for SPL even with driver model. Add the logic to support this. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Drop device removal error path when not supportedSimon Glass2015-04-23-10/+16
| | | | | | | | When CONFIG_DM_DEVICE_REMOVE is not enabled, such as in SPL, we cannot remove or unbind devices and do not expect to get errors when binding and probing devices. So drop the error path to reduce code size. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Remove unbind operations when not requiredSimon Glass2015-04-23-0/+4
| | | | | | | | The CONFIG_DM_DEVICE_REMOVE option takes out code related to removing devices. It should also remove the 'unbind' code since if we cannot remove we probably don't need to unbind. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Allow sequence alias support to be removed for SPLSimon Glass2015-04-23-13/+24
| | | | | | | | In many cases SPL only uses a single serial port and there is no need for alias sequence support. We will just use the serial port pointed to by stdout-path in the /chosen node. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Handle recursive unbinding of uclass devicesSimon Glass2015-04-22-2/+10
| | | | | | | | | | | | Since a device can have children in the same uclass as itself, we need to handle unbinding carefully: we must allow that unbinding a device in a uclass may cause another device in the same uclass to be unbound. Adjust the code to cope. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com> Tested-by: Joe Hershberger <joe.hershberger@ni.com>
* dm: core: remove type 'static' of function uclass_get_device_tail()Przemyslaw Marczak2015-04-22-11/+1
| | | | | | | | | | | Uclass API provides a few functions for get/find the device. To provide a complete function set of uclass-internal functions, for use by the drivers, the function uclass_get_device_tail() should be non-static. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: device: add function: dev_get_uclass_name()Przemyslaw Marczak2015-04-22-0/+8
| | | | | | | | | | | | | This commit extends the driver model device's API by function: - dev_get_uclass_name() And this function returns the device's uclass driver name if: - given dev pointer, is non_NULL otherwise, the NULL pointer is returned. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: device: add function: dev_get_driver_ops()Przemyslaw Marczak2015-04-22-0/+8
| | | | | | | | | | | | | | This commit extends the driver model device's API by function: - dev_get_driver_ops() And this function returns the device's driver's operations if given: - dev pointer, is non-NULL - dev->driver->ops pointer, is non-NULL in other case the, the NULL pointer is returned. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: uclass: add function: uclass_get_device_by_name()Przemyslaw Marczak2015-04-22-0/+11
| | | | | | | | | | | | | | | | | | | | | | This commit extends the driver model uclass's API by function: - uclass_get_device_by_name() And this function returns the device if: - uclass with given ID, exists, - device with exactly given name(dev->name), exists, - device probe, doesn't return an error. The returned device is activated and ready to use. Note: This function returns the first device, which name is equal to the given one. This means, that using this function you must assume, that the device name is unique in the given uclass's ID device list. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: uclass: add function: uclass_find_device_by_name()Przemyslaw Marczak2015-04-22-0/+24
| | | | | | | | | | | | | | | | | | | | | | | | This commit extends the driver model uclass's API by function: - uclass_find_device_by_name() And this function returns the device if: - uclass with given ID, exists, - device with exactly given name(dev->name), exists. The returned device is not activated - need to be probed before use. Note: This function returns the first device, which name is equal to the given one. This means, that using this function you must assume, that the device name is unique in the given uclass's ID device list. uclass-internal.h: cleanup - move the uclass_find_device_by_seq() declaration and description, near the other uclass_find*() functions. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: Extend struct udevice by '.uclass_platdata' field.Przemyslaw Marczak2015-04-22-4/+33
| | | | | | | | | | | | | | | | This commit adds 'uclass_platdata' field to 'struct udevice', which can be automatically allocated at bind. The allocation size is defined in 'struct uclass_driver' as 'per_device_platdata_auto_alloc_size'. New device's flag is added: DM_FLAG_ALLOC_UCLASS_PDATA, which is used for memory freeing at device unbind method. As for other udevice's fields, a complementary function is added: - dev_get_uclass_platdata() Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: add internal functions for getting the device without probePrzemyslaw Marczak2015-04-22-25/+34
| | | | | | | | | | | | | | | | This commit extends the uclass-internal functions by: - uclass_find_first_device() - uclass_find_next_device() For both functions, the returned device is not probed. After some cleanup, the above functions are called by: - uclass_first_device() - uclass_next_device() for which, the returned device is probed. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: Add device children and sibling functionsSimon Glass2015-04-18-0/+28
| | | | | | | | Add some utility functions to check for children and for the last sibling in a device's parent. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: core: Mark device as active before calling uclass probe() methodsSimon Glass2015-04-18-3/+5
| | | | | | | | | | The uclass pre-probe functions may end up calling back into the device in some circumstances. This can fail if recursion takes place. Adjust the ordering so that we mark the device as active early, then retract this later if needed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: core: Rename driver data function to dev_get_driver_data()Simon Glass2015-04-18-3/+3
| | | | | | | | | The existing get_get_of_data() function provides access to both the driver's compatible string and its driver data. However only the latter is actually useful. Update the interface to reflect this and fix up existing users. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: core: Convert driver_bind() to use constSimon Glass2015-04-18-5/+6
| | | | | | | | The driver is not modified by driver model, so update driver_bind() to recognise that. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: core: Support allocating driver-private data for DMASimon Glass2015-04-18-2/+17
| | | | | | | | | Some driver want to put DMA buffers in their private data. Add a flag to tell driver model to align driver-private data to a cache boundary so that DMA will work correctly in this case. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: core: Add a uclass pre_probe() method for devicesSimon Glass2015-04-16-2/+10
| | | | | | | | | | | | Some uclasses want to set up a device before it is probed. Add a method for this. An example is with PCI, where a PCI uclass wants to set up its private data for later use. This allows the device's uclass() method to make calls whcih use that data (for example, read PCI memory regions from device tree, set up bus numbers). Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Mark device as active before calling its probe() methodSimon Glass2015-04-16-3/+4
| | | | | | | | | | | | | | | | | | At present the device is not active when the probe() method is called. But some probe() methods want to set up the device and this can involve accessing it through normal methods. For example a PCI bus may wish to set up its PCI parameters using calls to pci_hose_write_config_dword() and similar. At present this does not work because every such call within the probe() method sees that the device is not active and attempts to probe it. Already we mark the device as probed before calling the uclass post_probe() method. This is a subtle change but I believe the new approach is better. Since the scope of the change is only the probe() method and all its callees it should still be within the control of the board author. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Add dev_get_uclass_priv() to access uclass private dataSimon Glass2015-04-16-0/+10
| | | | | | | | Add a convenience function to access the private data that a uclass stores for each of its devices. Convert over most existing uses for consistency and to provide an example for others. Signed-off-by: Simon Glass <sjg@chromium.org>
* kconfig: remove unneeded dependency on !SPL_BUILDMasahiro Yamada2015-02-24-10/+6
| | | | | | | Now CONFIG_SPL_BUILD is not defined in Kconfig, so "!depends on SPL_BUILD" and "if !SPL_BUILD" are redundant. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: Add support for all targets which requires MANUAL_RELOCMichal Simek2015-02-12-0/+64
| | | | | | | | | | Targets with CONFIG_NEEDS_MANUAL_RELOC do not use REL/RELA relocation (mostly only GOT) where functions aray are not updated. This patch is fixing function pointers for DM core and serial-uclass to ensure that relocated functions are called. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: introduce dev_get_addr interfacePeng Fan2015-02-12-0/+12
| | | | | | | | | Abstracting dev_get_addr can improve drivers that want to get device's address. Signed-off-by: Peng Fan <Peng.Fan@freescale.com> Acked-by: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Simon Glass <sjg@chromium.org>
* dm: Add Kconfig options for driver model SPL supportSimon Glass2015-02-12-0/+44
| | | | | | | The SPL support cannot be enabled yet, but we can add the Kconfig options in preparation for this. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Expand and complete Kconfig in drivers/Simon Glass2015-02-12-2/+4
| | | | | | | | Expand the help messages for each driver. Add missing Kconfig for I2C, SPI flash and thermal. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Ignore disabled devices when bindingSimon Glass2015-01-29-0/+5
| | | | | | | We don't want to bind devices which should never be used. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Allow uclass to set up a device's child before it is probedSimon Glass2015-01-29-0/+17
| | | | | | | | | 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 Glass2015-01-29-5/+16
| | | | | | | | | | | | 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 Glass2015-01-29-0/+8
| | | | | | | | | | | | | | 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 Glass2015-01-29-15/+13
| | | | | | | | | | | | | | | | 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 function to get a device's uclass IDSimon Glass2015-01-29-0/+5
| | | | | | | This is useful to check which uclass a device is in. 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 Glass2015-01-29-0/+12
| | | | | | | | 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 Glass2015-01-29-0/+4
| | | | | | | | | | | | | | 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 Glass2015-01-29-2/+32
| | | | | | | | | | | | 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: Allocate platform data when binding a deviceSimon Glass2015-01-29-13/+17
| | | | | | | | | | | | When using allocated platform data, allocate it when we bind the device. This makes it possible to fill in this information before the device is probed. This fits with the platform data model (when not using device tree), since platform data exists at bind-time. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Tidy up error handling in device_bind()Simon Glass2015-01-29-8/+10
| | | | | | | | Make the error handling more standard to make it easier to build on top of it. Also correct a bug in the error path where there is no parent. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: core: Set device tree node for root deviceSimon Glass2015-01-29-0/+3
| | | | | | | The root device corresponds to the root device tree node, so set this up. Also add a few notes to the documentation. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: device: Add newline to debug() messagesSimon Glass2014-12-11-3/+3
| | | | | | Some of these are missing a newline. Add it. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: remove unnecessary return condition in uclass lookupMasahiro Yamada2014-11-22-3/+0
| | | | | | | | | | These conditions never happen. - There is no real uclass with UCLASS_INVALID id. - uclass never becomes NULL because ll_entry_start() always returns a valid pointer. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: remove unnecessary return condition in driver lookupMasahiro Yamada2014-11-22-3/+0
| | | | | | | | | | The variable "drv" never becomes NULL because ll_entry_start() always returns a valid pointer even if there are no entries. The case "n_ents == 0" is covered by the following "for" loop. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: remove meaningless if conditionalMasahiro Yamada2014-11-22-2/+1
| | | | | | | | | | | | | | | | | | | | | If the variable "ret" is equal to "-ENOENT", it is trapped at [1] and never reaches [2]. At [3], the condition "ret != -ENOENT" is always true. if (ret == -ENOENT) { <------------------ [1] continue; } else if (ret == -ENODEV) { dm_dbg("Device '%s' has no compatible string\n", name); break; } else if (ret) { <------------------ [2] dm_warn("Device tree error at offset %d\n", offset); if (!result || ret != -ENOENT) <------------------ [3] result = ret; break; } Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: a trivial clean upMasahiro Yamada2014-11-22-3/+1
| | | | | Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: Add a function to bind a device by driver nameSimon Glass2014-11-22-0/+21
| | | | | | | | | In some cases we need to manually bind a device to a particular driver. Add a function to do this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> Acked-by: Heiko Schocher <hs@denx.de>
* dm: core: Add functions to find parent and OF dataSimon Glass2014-11-22-0/+5
| | | | | | | | Add dev_get_parent() as a convenience to obtain the parent of a device. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com> Acked-by: Heiko Schocher <hs@denx.de>
* dm: core: Allow access to the device's driver_id dataSimon Glass2014-11-22-6/+19
| | | | | | | | | When the device is created from a device tree node, it matches a compatible string. Allow access to that string and the associated data. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com> Acked-by: Heiko Schocher <hs@denx.de>
* dm: Allow device removal features to be droppedSimon Glass2014-11-21-169/+189
| | | | | | | | | For SPL we don't expect to need to remove a device. Save some code space by dropping this feature. The board config can define CONFIG_DM_DEVICE_REMOVE if this is in fact needed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com>
* dm: add entries to KconfigMasahiro Yamada2014-10-23-0/+6
| | | | | | | | Create entries of CONFIG_DM, CONFIG_DM_SERIAL, CONFIG_DM_GPIO and CONFIG_DM_SPI. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
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