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path: root/drivers/core/root.c
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2018-09-18dm: core: Scan "/firmware" node by defaultRajan Vaja
All Linux firmware drivers are put under "/firmware" node and it has support to populate "/firmware" node by default. u-boot and Linux can share same DTB. In this case, driver probe for devices under "/firmware" will not be invoked as "/firmware" does not have its own "compatible" property. This patch scans "/firmware" node by default like "/clocks". Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-09-18dm: core: Move "/clock" node scan into functionRajan Vaja
Create separate function for scanning node by path and move "/clock" node scan code into that function. This will be usable if scanning of more node is required. Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-04-01dm: core: make fixed-clock dt scan live dt compatibleAndy Yan
dm_scan_fdt_node can't work when live dt is active, we should use dm_scan_fdt_live instead. Signed-off-by: Andy Yan <andy.yan@rock-chips.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-03-05libfdt: move headers to <linux/libfdt.h> and <linux/libfdt_env.h>Masahiro Yamada
Thomas reported U-Boot failed to build host tools if libfdt-devel package is installed because tools include libfdt headers from /usr/include/ instead of using internal ones. This commit moves the header code: include/libfdt.h -> include/linux/libfdt.h include/libfdt_env.h -> include/linux/libfdt_env.h and replaces include directives: #include <libfdt.h> -> #include <linux/libfdt.h> #include <libfdt_env.h> -> #include <linux/libfdt_env.h> Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-01-15dm: core: parse chosen nodeRob Clark
This is the node that would contain, for example, the framebuffer setup by an earlier stage. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-10-04dm: replace dm_dbg() with pr_debug()Masahiro Yamada
As we discussed before in ML, dm_dbg() causes undefined reference error if #define DEBUG is added to users, but not drivers/core/util.c We do not need this macro because we can use pr_debug() instead, and it is pretty easy to enable it for the DM core by using ccflags-y. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-09-11dm: core: add clocks node scanPatrice Chotard
Currently, all fixed-clock declared in "clocks" node in device tree can be binded by clk_fixed_rate.c driver only if each of them have the "simple-bus" compatible string. This constraint has been invoked here [1]. This patch offers a solution to avoid adding "simple-bus" compatible string to nodes that are not busses. [1] https://patchwork.ozlabs.org/patch/558837/ Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-06-01dm: core: Scan the live tree when setting up driver modelSimon Glass
When starting up driver model with a live tree we need to scan the tree for devices. Add code to handle this. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01dm: core: Update lists_bind_fdt() to use ofnodeSimon Glass
Adjust this function to use an ofnode instead of an offset, so it can be used with livetree. This involves updating all callers. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01dm: core: Add ofnode to represent device tree nodesSimon Glass
With live tree we need a struct device_node * to reference a node. With the existing flat tree, we need an int offset. We need to unify these into a single value which can represent both. Add an ofnode union for this and adjust existing code to move to this. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01dm: core: Dont export dm_scan_fdt_node()Simon Glass
This function is only used in one place. It is better to just declare it internally since there is a simpler replacement for use outside the driver-model core code. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-04-04dm: core: Add dm_remove_devices_flags() and hook it into device_remove()Stefan Roese
The new function dm_remove_devices_flags() is intented for driver specific last-stage cleanup operations before the OS is started. This patch adds this functionality and hooks it into the common device_remove() function. Drivers wanting to use this feature for some last-stage removal calls, need to add one of the DM_REMOVE_xx flags to their driver .flags. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-04dm: core: Add flags parameter to device_remove()Stefan Roese
This patch adds the flags parameter to device_remove() and changes all calls to this function to provide the default value of DM_REMOVE_NORMAL for "normal" device removal. This is in preparation for the driver specific pre-OS (e.g. DMA cancelling) remove support. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org>
2017-03-22dm: core: Fix Handling of global_data moving in SPLLokesh Vutla
commit 2f11cd9121658 ("dm: core: Handle global_data moving in SPL") handles relocation of GD in SPL if spl_init() is called before board_init_r(). So, uclass_root.next need not be initialized always and accessing uclass_root.next->prev gives an abort. Update the uclass_root only if it is available. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2017-03-16dm: allow limiting pre-reloc markings to spl or tplHeiko Stübner
Right now the u-boot,dm-pre-reloc flag will make each marked node always appear in both spl and tpl. But systems needing an additional tpl might have special constraints for each, like the spl needing to be very tiny. So introduce two additional flags to mark nodes for only spl or tpl environments and introduce a function dm_fdt_pre_reloc to automate the necessary checks in code instances checking for pre-relocation flags. The behaviour of the original flag stays untouched and still marks a node for both spl and tpl. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Kever Yang <kever.yang@rock-chips.com>
2017-02-08dm: core: Replace of_offset with accessorSimon Glass
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-12-02dm: core: Handle global_data moving in SPLSimon Glass
When CONFIG_SPL_STACK_R is enabled, and spl_init() is called before board_init_r(), spl_relocate_stack_gd() will move global_data to a new place in memory. This affects driver model since it uses a list for the uclasses. Unless this is updated the list will become invalid. When looking for a non-existent uclass, such as when adding a new one, the loop in uclass_find() may continue forever, thus causing a hang. Add a function to correct this rather obscure bug. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-27dm: core: Add a function to bind child devicesSimon Glass
We currently use dm_scan_fdt_node() to bind devices. It is an internal function and it requires the caller to know whether we are pre- or post- relocation. This requirement has become quite common in drivers, so the current function is not ideal. Add a new function with fewer arguments, that does not require internal headers. This can be used directly as a post_bind() method if needed. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14dm: core: Don't use device tree with of-platdataSimon Glass
When CONFIG_SPL_OF_PLATDATA is enabled we should not access the device tree. Remove all references to this in the core driver-model code. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-06-19dm: add manual relocation for devicesAngelo Dureghello
Some architectures as m68k still need to use CONFIG_NEEDS_MANUAL_RELOC, and are not still using the device tree. Signed-off-by: Angelo Dureghello <angelo@sysam.it> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-12dm: core: Add option to configure an offset for the address translationStefan Roese
Some platforms need to ability to configure an offset to the standard addresses extracted from the device-tree. This patch allows this by adding a function to DM to configure this offset (if needed). Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Simon Glass <sjg@chromium.org> Cc: Simon Glass <sjg@chromium.org> Fixed space before tab: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-11-19dm: core: Add missing entries for manual relocationMichal Simek
Patches: "dm: core: Add a post_bind method for parents" (sha1: 0118ce79577f9b0881f99a6e4f8a79cd5014cb87) "dm: core: Add a uclass pre_probe() method for devices" (sha1: 02c07b3741f1b825934b1a6eb8f23530532dc426) "dm: core: Allow the uclass to set up a device's child after binding" (sha1: 081f2fcbd9a95ba10677065359791f8fea3f8c58) "dm: core: Allow uclass to set up a device's child before it is probed" (sha1: 83c7e434c9dd3ca81f8b763e23c1881b973bcf2f) Adds new entries to struct driver and struct uclass_driver without extending code for manual relocation. This patch fixes it for all architectures which requires MANUAL_RELOC. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
2015-09-02dm: Provide better debugging when a device fails to bindSimon Glass
All devices should bind without error. But when they don't, they can cause driver model init to fail. A real situation where this can happen is when there is a missing uclass. Add a debug() call to dm_scan_fdt_node to make this easier to track. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-18of: clean up OF_CONTROL ifdef conditionalsMasahiro Yamada
We have flipped CONFIG_SPL_DISABLE_OF_CONTROL. We have cleansing devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear away the ugly logic in include/fdtdec.h: #ifdef CONFIG_OF_CONTROL # if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL) # define OF_CONTROL 0 # else # define OF_CONTROL 1 # endif #else # define OF_CONTROL 0 #endif Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute. It refers to CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for SPL. Also, we no longer have to cancel CONFIG_OF_CONTROL in include/config_uncmd_spl.h and scripts/Makefile.spl. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2015-04-23dm: core: Select device tree control correctly for SPLSimon Glass
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>
2015-02-12dm: Add support for all targets which requires MANUAL_RELOCMichal Simek
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>
2015-01-29dm: core: Ignore disabled devices when bindingSimon Glass
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>
2015-01-29dm: core: Set device tree node for root deviceSimon Glass
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>
2014-11-22dm: core: a trivial clean upMasahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
2014-09-10dm: Adjust lists_bind_fdt() to return the bound deviceSimon Glass
Allow the caller to find out the device that was bound in response to this call. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-07-23dm: Add dm_scan_other() to locate board-specific devicesSimon Glass
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>
2014-07-23dm: Provide a function to scan child FDT nodesSimon Glass
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>
2014-07-23dm: Support driver model prior to relocationSimon Glass
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>
2014-07-23dm: Allow drivers to be marked 'before relocation'Simon Glass
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>
2014-07-23dm: Provide a way to shut down driver modelSimon Glass
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>
2014-07-23dm: Make sure that the root device is probedSimon Glass
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>
2014-07-18dm: add missing includesJeroen Hofstee
lists.c / root.c do not include their own header and they could potentially implement a different function. Therefore actually include the headers. cc: sjg@chromium.org Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> Acked-by: Simon Glass <sjg@chromium.org>
2014-06-20dm: Cast away the const-ness of the global_data pointerSimon Glass
In a very few cases we need to adjust the driver model root device, such as when setting it up at initialisation. Add a macro to make this easier. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-20dm: Add missing header files in lists and rootSimon Glass
These files don't compile in some architectures. Fix it by adding the missing headers. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-05-27dm: rename device struct to udeviceHeiko Schocher
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>
2014-03-04dm: Add base driver model supportSimon Glass
Add driver model functionality for generic board. This includes data structures and base code for registering devices and uclasses (groups of devices with the same purpose, e.g. all I2C ports will be in the same uclass). The feature is enabled with CONFIG_DM. 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>