- 25 11月, 2014 2 次提交
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由 Grant Likely 提交于
To simplify subsystem setup code, make empty stubs for the of_reconfig_*() methods. This is particularly useful for registering and unregistering the notifiers so that it doesn't impact the flow of the subsystem setup code. Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Pantelis Antoniou 提交于
Introduce of_reconfig_get_state_change() which allows an of notifier to query about device state changes. Signed-off-by: NPantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 19 11月, 2014 1 次提交
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由 Kevin Cernekee 提交于
This function can only return true or false; using a bool makes it more obvious to the reader. Signed-off-by: NKevin Cernekee <cernekee@gmail.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 05 11月, 2014 1 次提交
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由 Thierry Reding 提交于
Signed-off-by: NThierry Reding <treding@nvidia.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 04 11月, 2014 3 次提交
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由 Grant Likely 提交于
The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: NGrant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
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由 Sebastian Reichel 提交于
Introduce signed 32bit integer of_property_read method. Signed-off-by: NSebastian Reichel <sre@kernel.org> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Grant Likely 提交于
The string property read helpers will run off the end of the buffer if it is handed a malformed string property. Rework the parsers to make sure that doesn't happen. At the same time add new test cases to make sure the functions behave themselves. The original implementations of of_property_read_string_index() and of_property_count_strings() both open-coded the same block of parsing code, each with it's own subtly different bugs. The fix here merges functions into a single helper and makes the original functions static inline wrappers around the helper. One non-bugfix aspect of this patch is the addition of a new wrapper, of_property_read_string_array(). The new wrapper is needed by the device_properties feature that Rafael is working on and planning to merge for v3.19. The implementation is identical both with and without the new static inline wrapper, so it just got left in to reduce the churn on the header file. Signed-off-by: NGrant Likely <grant.likely@linaro.org> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Darren Hart <darren.hart@intel.com> Cc: <stable@vger.kernel.org> # v3.3+: Drop selftest hunks that don't apply
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- 05 10月, 2014 1 次提交
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由 Pantelis Antoniou 提交于
Introduce support for dynamic device tree resolution. Using it, it is possible to prepare a device tree that's been loaded on runtime to be modified and inserted at the kernel live tree. Export of of_resolve and bug fix of double free by Guenter Roeck <groeck@juniper.net> Signed-off-by: NPantelis Antoniou <pantelis.antoniou@konsulko.com> [grant.likely: Don't need to select CONFIG_OF_DYNAMIC and CONFIG_OF_DEVICE] [grant.likely: Don't need to depend on OF or !SPARC] [grant.likely: Factor out duplicate code blocks into single function] Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 24 7月, 2014 3 次提交
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由 Pantelis Antoniou 提交于
Introducing DT transactional support. A DT transaction is a method which allows one to apply changes in the live tree, in such a way that either the full set of changes take effect, or the state of the tree can be rolled-back to the state it was before it was attempted. An applied transaction can be rolled-back at any time. Documentation is in Documentation/devicetree/changesets.txt Signed-off-by: NPantelis Antoniou <pantelis.antoniou@konsulko.com> [glikely: Removed device notifiers and reworked to be more consistent] Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Grant Likely 提交于
Currently, devicetree reconfig notifiers get emitted before the change is applied to the tree, but that behaviour is problematic if the receiver wants the determine the new state of the tree. The current users don't care, but the changeset code to follow will be making multiple changes at once. Reorder notifiers to get emitted after the change has been applied to the tree so that callbacks see the new tree state. At the same time, fixup the existing callbacks to expect the new order. There are a few callbacks that compare the old and new values of a changed property. Put both property pointers into the of_prop_reconfig structure. The current notifiers also allow the notifier callback to fail and cancel the change to the tree, but that feature isn't actually used. It really isn't valid to ignore a tree modification provided by firmware anyway, so remove the ability to cancel a change to the tree. Signed-off-by: NGrant Likely <grant.likely@linaro.org> Cc: Nathan Fontenot <nfont@austin.ibm.com>
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由 Grant Likely 提交于
All of the DT modification functions are split into two parts, the first part manipulates the DT data structure, and the second part updates sysfs, but the code isn't very consistent about how the second half is called. They don't all enforce the same rules about when it is valid to update sysfs, and there isn't any clarity on locking. The transactional DT modification feature that is coming also needs access to these functions so that it can perform all the structure changes together, and then all the sysfs updates as a second stage instead of doing each one at a time. Fix up the second have by creating a separate __of_*_sysfs() function for each of the helpers. The new functions have consistent naming (ie. of_node_add() becomes __of_attach_node_sysfs()) and all of them now defer if of_init hasn't been called yet. Callers of the new functions must hold the of_mutex to ensure there are no race conditions with of_init(). The mutex ensures that there will only ever be one writer to the tree at any given time. There can still be any number of readers and the raw_spin_lock is still used to make sure access to the data structure is still consistent. Finally, put the function prototypes into of_private.h so they are accessible to the transaction code. Signed-off-by: NPantelis Antoniou <pantelis.antoniou@konsulko.com> [grant.likely: Changed suffix from _post to _sysfs to match existing code] [grant.likely: Reorganized to eliminate trivial wrappers] Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 07 7月, 2014 1 次提交
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由 Grant Likely 提交于
of_platform_destroy does not work properly, since the tree population test was iterating on all devices having as its parent the given platform device. The check was intended to check whether any other platform or amba devices created by of_platform_populate were still populated, but instead checked for every kind of device. This is wrong, since platform devices typically create a subsystem regular device and set themselves as parents. Instead, go ahead and call the unregister functions for any devices created with of_platform_populate. The driver core will take care of unbinding drivers, and drivers are responsible for getting rid of any child devices that weren't created by of_platform_populate. Signed-off-by: NGrant Likely <grant.likely@linaro.org> Signed-off-by: NPantelis Antoniou <pantelis.antoniou@konsulko.com>
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- 27 6月, 2014 2 次提交
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由 Grant Likely 提交于
The evh_bytechan, hvc_opal and hvc_vio drivers all open code the parsing of the stdout node in the device tree. This patch simplifies the driver by removing the duplicated functionality. Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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由 Grant Likely 提交于
The devicetree has a binding for specifying the console device in the /chosen node, but the kernel doesn't use it consistently. This change adds an API for testing if a device node is a console, and adds a preferred console entry if it is. At the same time this patch removes the of_device_is_stdout_path() API since it is unused. Signed-off-by: NGrant Likely <grant.likely@linaro.org> Tested-by: NSascha Hauer <s.hauer@pengutronix.de>
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- 21 5月, 2014 1 次提交
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由 Rob Herring 提交于
We now have several OF match tables using linker sections that are nearly the same definition. The only variation is the callback function prototype. Create a common define for creating linker section OF match table entries which each table declaration can use. Acked-by: NGrant Likely <grant.likely@linaro.org> Signed-off-by: NRob Herring <robh@kernel.org>
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- 16 5月, 2014 1 次提交
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由 Pawel Moll 提交于
In "Device Tree powered" systems, platform devices are usually massively populated with of_platform_populate() call, executed at some level of initcalls, either by generic architecture or by platform-specific code. There are situations though where certain devices must be created (and bound with drivers) before all the others. This presents a challenge, as devices created explicitly would be created again by of_platform_populate(). This patch tries to solve that issue in a generic way, adding a "populated" flag for a DT node description. Subsequent of_platform_populate() will skip such nodes (and its children) in a similar way to the non-available ones. This patch also adds of_platform_depopulate() as an operation complementary to the _populate() one. It removes a platform or an amba device populated from the Device Tree, together with its all children (leaving, however, devices without associated of_node untouched) clearing the "populated" flag on the way. Signed-off-by: NPawel Moll <pawel.moll@arm.com> Reviewed-by: NRob Herring <robh@kernel.org> Acked-by: NGrant Likely <grant.likely@linaro.org>
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- 15 5月, 2014 1 次提交
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由 Stephen Rothwell 提交于
Make the CONFIG_OF=n prototpe of of_node_full_name() mateh the CONFIG_OF=y version. Fixes compile warnings like this: sound/soc/soc-core.c: In function 'soc_check_aux_dev': sound/soc/soc-core.c:1667:3: warning: passing argument 1 of 'of_node_full_name' discards 'const' qualifier from pointer target type [enabled by default] codecname = of_node_full_name(aux_dev->codec_of_node); when CONFIG_OF is not defined. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 18 4月, 2014 1 次提交
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由 Alexander Shiyan 提交于
Add an empty version of of_find_node_by_path(). This fixes following build error for asoc tree: sound/soc/fsl/fsl_ssi.c: In function 'fsl_ssi_probe': sound/soc/fsl/fsl_ssi.c:1471:2: error: implicit declaration of function 'of_find_node_by_path' [-Werror=implicit-function-declaration] sprop = of_get_property(of_find_node_by_path("/"), "compatible", NULL); Reported-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NAlexander Shiyan <shc_work@mail.ru> Signed-off-by: NRob Herring <robh@kernel.org>
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- 19 3月, 2014 1 次提交
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由 Pantelis Antoniou 提交于
After the move to having device nodes be proper kobjects the lifecycle of the node needs to be controlled better. At first convert of_add_node() in the unflattened functions to of_init_node() which initializes the kobject so that of_node_get/put work correctly even before of_init is called. Afterwards introduce of_node_is_initialized & of_node_is_attached that query the underlying kobject about the state (attached means kobj is visible in sysfs) Using that make sure the lifecycle of the tree is correct at all times. Signed-off-by: NPantelis Antoniou <panto@antoniou-consulting.com> [grant.likely: moved of_node_init() calls, fixed up locking, and dropped __of_populate() hunks] Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 12 3月, 2014 2 次提交
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由 Grant Likely 提交于
The same data is now available in sysfs, so we can remove the code that exports it in /proc and replace it with a symlink to the sysfs version. Tested on versatile qemu model and mpc5200 eval board. More testing would be appreciated. v5: Fixed up conflicts with mainline changes Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David S. Miller <davem@davemloft.net> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
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由 Grant Likely 提交于
Device tree nodes are already treated as objects, and we already want to expose them to userspace which is done using the /proc filesystem today. Right now the kernel has to do a lot of work to keep the /proc view in sync with the in-kernel representation. If device_nodes are switched to be kobjects then the device tree code can be a whole lot simpler. It also turns out that switching to using /sysfs from /proc results in smaller code and data size, and the userspace ABI won't change if /proc/device-tree symlinks to /sys/firmware/devicetree/base. v7: Add missing sysfs_bin_attr_init() v6: Add __of_add_property() early init fixes from Pantelis v5: Rename firmware/ofw to firmware/devicetree Fix updating property values in sysfs v4: Fixed build error on Powerpc Fixed handling of dynamic nodes on powerpc v3: Fixed handling of duplicate attribute and child node names v2: switch to using sysfs bin_attributes which solve the problem of reporting incorrect property size. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Tested-by: NSascha Hauer <s.hauer@pengutronix.de> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David S. Miller <davem@davemloft.net> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
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- 12 2月, 2014 1 次提交
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由 Heiko Stuebner 提交于
The need to know the number of array elements in a property is a common pattern. To prevent duplication of open-coded implementations add a helper static function that also centralises strict sanity checking and DTB format details, as well as a set of wrapper functions for u8, u16, u32 and u64. Suggested-by: NMark Rutland <mark.rutland@arm.com> Signed-off-by: NHeiko Stuebner <heiko.stuebner@bqreaders.com> Acked-by: NRob Herring <robh@kernel.org> Acked-by: NGrant Likely <grant.likely@linaro.org> Acked-by: NMark Rutland <mark.rutland@arm.com> Signed-off-by: NMark Brown <broonie@linaro.org>
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- 05 2月, 2014 2 次提交
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由 Rob Herring 提交于
Commit 00b2c76a "include/linux/of.h: make for_each_child_of_node() reference its args when CONFIG_OF=n" fixed warnings for unused variables, but introduced variable "used uninitialized" warnings. Simply initializing the variables would result in "set but not used" warnings with W=1. Fix both types of warnings by making all the for_each macros unconditional and rely on the dummy static inline functions to initialize and reference any variables. Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: NRob Herring <robh@kernel.org> Acked-by: NGrant Likely <grant.likely@linaro.org>
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由 Andreas Herrmann 提交于
arm-smmu driver uses of_parse_phandle_with_args when parsing DT information to determine stream IDs for a master device. Thus the number of stream IDs per master device is bound by MAX_PHANDLE_ARGS. To support Calxeda ECX-2000 hardware arm-smmu driver requires a slightly higher value for MAX_PHANDLE_ARGS as this hardware has 10 stream IDs for one master device. Increasing it to 16 seems a reasonable choice. Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Cc: Andreas Herrmann <herrmann.der.user@googlemail.com> Acked-by: NRob Herring <robh@kernel.org> Signed-off-by: NAndreas Herrmann <andreas.herrmann@calxeda.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 03 2月, 2014 1 次提交
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由 Pantelis Antoniou 提交于
Helper functions for working with device node flags. Signed-off-by: NPantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 24 1月, 2014 1 次提交
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由 David Howells 提交于
Make for_each_child_of_node() reference its args when CONFIG_OF=n to avoid warnings like: drivers/leds/leds-pwm.c:88:22: warning: unused variable 'node' [-Wunused-variable] struct device_node *node = pdev->dev.of_node; ^ Signed-off-by: NDavid Howells <dhowells@redhat.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 04 11月, 2013 1 次提交
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由 Sylwester Nawrocki 提交于
Add this empty macro definition so users can be compiled without excluding this macro call with preprocessor directives when CONFIG_OF is disabled. Signed-off-by: NSylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com> Signed-off-by: NRob Herring <rob.herring@calxeda.com>
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- 31 10月, 2013 1 次提交
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由 Sudeep KarkadaNagesha 提交于
Since the definition of_find_next_cache_node is architecture independent, the existing definition in powerpc can be moved to driver/of/base.c Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 26 10月, 2013 1 次提交
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由 Bryan Wu 提交于
Some drivers keep counting available child by themselves. So introduce a new simple API like of_get_child_count() but for available childs. Cc: Josh Wu <josh.wu@atmel.com> Signed-off-by: NBryan Wu <cooloney@gmail.com> Acked-by: NRob Herring <rob.herring@calxeda.com>
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- 24 10月, 2013 1 次提交
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由 Grant Likely 提交于
It is sometimes useful for debug to get the contents of an of_phandle_args structure out into the kernel log. Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 10 10月, 2013 2 次提交
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由 Rob Herring 提交于
The dependency on prom.h by the core DT code is now removed and only sparc needs to include prom.h for the core code. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NGrant Likely <grant.likely@linaro.org>
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由 Rob Herring 提交于
Implement of_node_to_nid as weak function to remove the dependency on asm/prom.h. This is in preparation to make prom.h optional. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NGrant Likely <grant.likely@linaro.org>
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- 30 8月, 2013 1 次提交
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由 Stephen Warren 提交于
This is identical to of_parse_phandle_with_args(), except that the number of argument cells is fixed, rather than being parsed out of the node referenced by each phandle. Signed-off-by: NStephen Warren <swarren@nvidia.com> Acked-by: NMark Rutland <mark.rutland@arm.com> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 21 8月, 2013 1 次提交
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由 Sudeep KarkadaNagesha 提交于
This patch moves the generalized implementation of of_get_cpu_node from PowerPC to DT core library, thereby adding support for retrieving cpu node for a given logical cpu index on any architecture. The CPU subsystem can now use this function to assign of_node in the cpu device while registering CPUs. It is recommended to use these helper function only in pre-SMP/early initialisation stages to retrieve CPU device node pointers in logical ordering. Once the cpu devices are registered, it can be retrieved easily from cpu device of_node which avoids unnecessary parsing and matching. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Acked-by: NRob Herring <rob.herring@calxeda.com> Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
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- 13 8月, 2013 1 次提交
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由 Sascha Hauer 提交于
devicetrees may have a linux,stdout-path property in the chosen node describing the console device. This adds a helper function to match a device against this property so a driver can call add_preferred_console for a matching device. Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Acked-by: NRob Herring <rob.herring@calxeda.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 24 7月, 2013 1 次提交
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I am getting a few |warning: unused variable ‘p’ [-Wunused-variable] |warning: unused variable ‘prop’ [-Wunused-variable] in the case where CONFIG_OF is not defined and the parameters are only used in the loop macro. Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: NGrant Likely <grant.likely@linaro.org>
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- 02 5月, 2013 1 次提交
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由 David Howells 提交于
Move some bits from linux/proc_fs.h to linux/of.h, signal.h and tty.h. Also move proc_tty_init() and proc_device_tree_init() to fs/proc/internal.h as they're internal to procfs. Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: NGrant Likely <grant.likely@secretlab.ca> cc: devicetree-discuss@lists.ozlabs.org cc: linux-arch@vger.kernel.org cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Jri Slaby <jslaby@suse.cz> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 12 4月, 2013 1 次提交
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由 Rob Herring 提交于
Add an empty version of of_device_is_available. Signed-off-by: NRob Herring <rob.herring@calxeda.com>
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- 10 4月, 2013 1 次提交
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由 Alexander Shiyan 提交于
Fixes build error on x86_64 allmodconfig, introduced by commit 5ab3a89a ("mfd: syscon: Add non-DT support"). drivers/regulator/anatop-regulator.c: In function 'anatop_regulator_probe': drivers/regulator/anatop-regulator.c:134:2: error: implicit declaration of function 'of_get_parent' [-Werror=implicit-function-declaration] Signed-off-by: NAlexander Shiyan <shc_work@mail.ru> Acked-by: NRob Herring <rob.herring@calxeda.com> Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
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- 04 4月, 2013 1 次提交
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由 Tony Prisk 提交于
This patch adds an of_property_read_u32_index() function to allow reading a single indexed u32 value from a property containing multiple u32 values. Signed-off-by: NTony Prisk <linux@prisktech.co.nz> Reviewed-by: NStephen Warren <swarren@nvidia.com> Acked-by: NLinus Walleij <linus.walleij@linaro.org> Acked-by: NRob Herring <robherring2@gmail.com>
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