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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 <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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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 <[email protected]>
Cc: Simon Glass <[email protected]>
Acked-by: Simon Glass <[email protected]>
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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 <[email protected]>
Signed-off-by: Lokesh Vutla <[email protected]>
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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 <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Tested-by: Kever Yang <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
Acked-by: Simon Glass <[email protected]>
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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 <[email protected]>
Acked-by: Simon Glass <[email protected]>
Cc: Simon Glass <[email protected]>
Fixed space before tab:
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
Acked-by: Simon Glass <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Acked-by: Linus Walleij <[email protected]>
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Some boards will not use device tree for SPL even with driver model. Add
the logic to support this.
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
Acked-by: Simon Glass <[email protected]>
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We don't want to bind devices which should never be used.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Masahiro Yamada <[email protected]>
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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 <[email protected]>
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Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Simon Glass <[email protected]>
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Allow the caller to find out the device that was bound in response to this
call.
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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Add a new method which removes and unbinds all drivers.
Signed-off-by: Simon Glass <[email protected]>
Acked-by: Marek Vasut <[email protected]>
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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 <[email protected]>
Acked-by: Marek Vasut <[email protected]>
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lists.c / root.c do not include their own header and they
could potentially implement a different function. Therefore
actually include the headers.
cc: [email protected]
Signed-off-by: Jeroen Hofstee <[email protected]>
Acked-by: Simon Glass <[email protected]>
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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 <[email protected]>
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These files don't compile in some architectures. Fix it by adding the
missing headers.
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Marek Vasut <[email protected]>
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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 <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
Signed-off-by: Pavel Herrmann <[email protected]>
Signed-off-by: Viktor Křivák <[email protected]>
Signed-off-by: Tomas Hlavacek <[email protected]>
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