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* 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>
* dm: core: Add support for simple-busSimon Glass2014-10-22-0/+34
| | | | | | | Add a driver for the simple-bus nodes, which allows devices within these nodes to be bound. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Allow parents to pass data to children during probeSimon Glass2014-10-22-1/+8
| | | | | | | | | | | Buses sometimes want to pass data to their children when they are probed. For example, a SPI bus may want to tell the slave device about the chip select it is connected to. Add a new function to permit the parent data to be supplied to the child. 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/+27
| | | | | | | | 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: simplify the loop in lists_driver_lookup_name()Masahiro Yamada2014-10-22-8/+1
| | | | | | | | | | | | | | | | | | | | if (strncmp(name, entry->name, len)) continue; /* Full match */ if (len == strlen(entry->name)) return entry; is equivalent to: if (!strcmp(name, entry->name)) return entry; The latter is simpler. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Igor Grinberg <grinberg@compulab.co.il>
* dm: do not check the existence of uclass operationMasahiro Yamada2014-10-22-4/+0
| | | | | | | | | | | | | | | | | | The function uclass_add() checks uc_drv->ops as follows: if (uc_drv->ops) { dm_warn("No ops for uclass id %d\n", id); return -EINVAL; } It seems odd because it warns "No ops" when uc_drv->ops has non-NULL pointer. (Looks opposite.) Anyway, most of UCLASS_DRIVER entries have no .ops member. This check makes no sense. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* kbuild: refactor some makefilesMasahiro Yamada2014-09-24-1/+1
| | | | | | | | | | | | | | | | | | [1] Move driver/core/, driver/input/ and drivers/input/ entries from the top Makefile to drivers/Makefile [2] Remove the conditional by CONFIG_DM in drivers/core/Makefile because the whole drivers/core directory is already selected by CONFIG_DM in the upper level [3] Likewise for CONFIG_DM_DEMO in drivers/demo/Makefile [4] Simplify common/Makefile - both CONFIG_DDR_SPD and CONFIG_SPD_EEPROM are boolean macros so they can directly select objects Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Marek Vasut <marex@denx.de>
* kconfig: add blank Kconfig filesMasahiro Yamada2014-09-24-0/+0
| | | | | | | | This would be useful to start moving various config options. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
* dm: avoid dev->req_seq overflowRobert Baldyga2014-09-23-0/+2
| | | | | | | | | | | | | Since dev->req_seq value is initialized from "reg" property of fdt node, there is posibility, that address value contained in fdt is greater than INT_MAX, and then value in dev->req_seq is negative which led to probe() fail. This patch fix this problem by ensuring that req_seq is positive, unless it's one of errno codes. Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
* dm: core: Allow device_bind() to used without CONFIG_OF_CONTROLSimon Glass2014-09-23-2/+5
| | | | | | | | The sequence number support in driver model requires device tree control. It should be skipped if CONFIG_OF_CONTROL is not defined, and should not require functions from fdtdec. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Adjust lists_bind_fdt() to return the bound deviceSimon Glass2014-09-10-4/+8
| | | | | | | Allow the caller to find out the device that was bound in response to this call. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add dm_scan_other() to locate board-specific devicesSimon Glass2014-07-23-0/+8
| | | | | | | | Some boards will have devices which are not in the device tree and do not have platform data. They may be programnatically created, for example. Add a hook which boards can use to bind those devices early in boot. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Improve errors and warnings in lists_bind_fdt()Simon Glass2014-07-23-3/+13
| | | | | | | Add a debug message for when a device tree node has no driver. Also reword the warning when a device fails to bind, which was misleading. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Add child_pre_probe() and child_post_remove() methodsSimon Glass2014-07-23-1/+15
| | | | | | | | | | | 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/+26
| | | | | | | | | | | | | 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/+93
| | | | | | | | | | | | | | | | | 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 Glass2014-07-23-15/+18
| | | | | | | | | | | | | | 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/+2
| | | | | | 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/+35
| | | | | | | | 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: Introduce device sequence numberingSimon Glass2014-07-23-0/+106
| | | | | | | | | | | | | | | | | | | | | | | | | 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: Move uclass error checking/probing into a functionSimon Glass2014-07-23-6/+22
| | | | | | Several functions will use this same pattern, so bring it into a function. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Support driver model prior to relocationSimon Glass2014-07-23-0/+25
| | | | | | | Initialise devices marked 'pre-reloc' and make them available prior to relocation. Note that this requires pre-reloc malloc() to be available. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Allow drivers to be marked 'before relocation'Simon Glass2014-07-23-9/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | 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: Provide a way to shut down driver modelSimon Glass2014-07-23-0/+8
| | | | | | | Add a new method which removes and unbinds all drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
* dm: Make sure that the root device is probedSimon Glass2014-07-23-0/+3
| | | | | | | | | 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>
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