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path: root/drivers/of
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2011-01-15dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch()Grant Likely1-7/+1
The physical address is never used by the device tree code when allocating memory for unflattening. Change the architecture's alloc hook to return the virutal address instead. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-10Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds7-201/+388
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (29 commits) of/flattree: forward declare struct device_node in of_fdt.h ipmi: explicitly include of_address.h and of_irq.h sparc: explicitly cast negative phandle checks to s32 powerpc/405: Fix missing #{address,size}-cells in i2c node powerpc/5200: dts: refactor dts files powerpc/5200: dts: Change combatible strings on localbus powerpc/5200: dts: remove unused properties powerpc/5200: dts: rename nodes to prepare for refactoring dts files of/flattree: Update dtc to current mainline. of/device: Don't register disabled devices powerpc/dts: fix syntax bugs in bluestone.dts of: Fixes for OF probing on little endian systems of: make drivers depend on CONFIG_OF instead of CONFIG_PPC_OF of/flattree: Add of_flat_dt_match() helper function of_serial: explicitly include of_irq.h of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree of/flattree: Reorder unflatten_dt_node of/flattree: Refactor unflatten_dt_node of/flattree: Add non-boottime device tree functions of/flattree: Add Kconfig for EARLY_FLATTREE ... Fix up trivial conflict in arch/sparc/prom/tree_32.c as per Grant.
2011-01-03of/device: Don't register disabled devicesGrant Likely1-8/+14
Device nodes with the property status="disabled" are not usable and so don't register them when parsing the device tree for devices. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Hollis Blanchard <hollis_blanchard@mentor.com> Cc: Deepak Saxena <deepak_saxena@mentor.com> Cc: Scott Wood <scottwood@freescale.com>, Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-01-01of/flattree: Add of_flat_dt_match() helper functionGrant Likely1-2/+35
This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-12-29of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_treeStephen Neuendorffer1-51/+98
unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Reorder unflatten_dt_nodeStephen Neuendorffer1-109/+109
Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Refactor unflatten_dt_nodeStephen Neuendorffer1-11/+16
unflatten_dt_node is a helper function that does most of the work to convert a device tree blob into tree of device nodes. This code now uses a passed-in blob instead of using the single boot-time blob, allowing it to be called in more contexts. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Add non-boottime device tree functionsStephen Neuendorffer1-54/+79
In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Add Kconfig for EARLY_FLATTREEStephen Neuendorffer2-0/+8
The device tree code is now in two pieces: some which can be used generically on any platform which selects CONFIG_OF_FLATTREE, and some early which is used at boot time on only a few architectures. This patch segregates the early code so that only those architectures which care about it need compile it. This also means that some of the requirements in the early code (such as a cmd_line variable) that most architectures (e.g. X86) don't provide can be ignored. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> [grant.likely@secretlab.ca: remove extra blank line addition] [grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check] [grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend on OF_FLATTREE] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24of/i2c: Fix request module by aliasDavid Daney1-1/+1
If we are registering an i2c device that has a device tree node like this real-world example: rtc@68 { compatible = "dallas,ds1337"; reg = <0x68>; }; of_i2c_register_devices() will try to load a module called ds1337.ko. There is no such module, so it will fail. If we look in modules.alias we will find entries like these: . . . alias i2c:ds1339 rtc_ds1307 alias i2c:ds1338 rtc_ds1307 alias i2c:ds1337 rtc_ds1307 alias i2c:ds1307 rtc_ds1307 alias i2c:ds1374 rtc_ds1374 . . . The module we want is really called rtc_ds1307.ko. If we request a module called "i2c:ds1337", the userspace module loader will do the right thing (unless it is busybox) and load rtc_ds1307.ko. So we add the I2C_MODULE_PREFIX to the request_module() string. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24of/mdio: Fix some endianness problems.David Daney1-9/+17
In of_mdiobus_register(), the __be32 *addr variable is dereferenced. This will not work on little-endian targets. Also since it is unsigned, checking for less than zero is redundant. Fix these two issues. Signed-off-by: David Daney <ddaney@caviumnetworks.com> [grant.likely@secretlab.ca: removed goto] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23of/address: use proper endianess in get_flagsSebastian Andrzej Siewior1-26/+28
This patch changes u32 to __be32 for all "ranges", "prop" and "addr" and such. Those variables are pointing to the device tree which contains integers in big endian format. Most functions are doing it right because of_read_number() is doing the right thing for them. of_bus_isa_get_flags(), of_bus_pci_get_flags() and of_bus_isa_map() were accessing the data directly and were doing it wrong. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-01of/net: Move of_get_mac_address() to a common source file.David Daney3-0/+53
There are two identical implementations of of_get_mac_address(), one each in arch/powerpc/kernel/prom_parse.c and arch/microblaze/kernel/prom_parse.c. Move this function to a new common file of_net.{c,h} and adjust all the callers to include the new header. Signed-off-by: David Daney <ddaney@caviumnetworks.com> [grant.likely@secretlab.ca: protect header with #ifdef] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-21of/mips: Cleanup some include directives/files.David Daney1-0/+1
The __init directives should go on the definitions of things, not the declaration, also __init is meaningless for inline functions, so remove it from prom.h. This allows us to get rid of a useless #include, but most of the rest of them are useless too, so kill them as well. If of_i2c.c needs irq definitions, it should include linux/irq.h directly, not assume indirect inclusion via asm/prom.h. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-21of/flattree: Eliminate need to provide early_init_dt_scan_chosen_archGrant Likely1-2/+0
This patch refactors the early init parsing of the chosen node so that architectures aren't forced to provide an empty implementation of early_init_dt_scan_chosen_arch. Instead, if an architecture wants to do something different, it can either use a wrapper function around early_init_dt_scan_chosen(), or it can replace it altogether. This patch was written in preparation to adding device tree support to both x86 ad MIPS. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: David Daney <ddaney@caviumnetworks.com>
2010-10-21of/device: Rework to use common platform_device_alloc() for allocating devicesGrant Likely2-31/+20
The current code allocates and manages platform_devices created from the device tree manually. It also uses an unsafe shortcut for allocating the platform_device and the resource table at the same time. (which I added in the last rework; sorry). This patch refactors the code to use platform_device_alloc() for allocating new devices. This reduces the amount of custom code implemented by of_platform, eliminates the unsafe alloc trick, and has the side benefit of letting the platform_bus code manage freeing the device data and resources when the device is freed. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michal Simek <monstr@monstr.eu>
2010-10-12of: use __be32 types for big-endian device tree dataJeremy Kerr2-3/+3
Use the sparse annotations so we can keep track of endianness. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-12of/irq: remove references to NO_IRQ in drivers/of/platform.cAndres Salomon2-7/+42
Instead of referencing NO_IRQ in platform.c, define some helper functions in irq.c to call instead from platform.c. Keep NO_IRQ usage local to irq.c, and define NO_IRQ if not defined in headers. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-12of/promtree: add package-to-path support to pdtAndres Salomon1-1/+42
package-to-path is a PROM function which tells us the real (full) name of the node. This provides a hook for that in the prom ops struct, and makes use of it in the pdt code when attempting to determine a node's name. If the hook is available, try using it (falling back to looking at the "name" property if it fails). Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-12of/promtree: add of_pdt namespace to pdt codeAndres Salomon1-20/+20
For symbols still lacking namespace qualifiers, add an of_pdt_ prefix. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-12of/promtree: no longer call prom_ functions directly; use an ops structureAndres Salomon1-22/+18
Rather than assuming an architecture defines prom_getchild and friends, define an ops struct with hooks for the various prom functions that pdt.c needs. This ops struct is filled in by the arch-(and sometimes firmware-)specific code, and passed to of_pdt_build_devicetree. Update sparc code to define the ops struct as well. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-10of/promtree: make drivers/of/pdt.c no longer sparc-onlyAndres Salomon3-16/+44
Clean up pdt.c: - make build dependent upon config OF_PROMTREE - #ifdef out the sparc-specific stuff - create pdt-specific header Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-09sparc: break out some PROM device-tree building code out into drivers/ofAndres Salomon1-0/+215
Transitioning into making this useful for architectures other than sparc. This is a verbatim copy of all functions/variables that've been moved. Signed-off-by: Andres Salomon <dilinger@queued.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-08-06of/device: Replace struct of_device with struct platform_deviceGrant Likely1-1/+1
of_device is just an alias for platform_device, so remove it entirely. Also replace to_of_device() with to_platform_device() and update comment blocks. This patch was initially generated from the following semantic patch, and then edited by hand to pick up the bits that coccinelle didn't catch. @@ @@ -struct of_device +struct platform_device Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: David S. Miller <davem@davemloft.net>
2010-08-01of/platform: Register of_platform_drivers with an "of:" prefixGrant Likely1-0/+16
Currently there are some drivers in tree which register both a platform_driver and an of_platform_driver with the same name. This is a temporary situation until all the relevant of_platform_drivers are converted to be normal platform_drivers. Until then, this patch gives all the of_platform_drivers an "of:" prefix to protect against bogus matches and namespace conflicts.
2010-07-30of/spi: call of_register_spi_devices() from spi core codeAnatolij Gustschin1-4/+6
Move of_register_spi_devices() call from drivers to spi_register_master(). Also change the function to use the struct device_node pointer from master spi device instead of passing it as function argument. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-30of/device: Make of_device_make_bus_id() usable by other code.Grant Likely1-1/+1
The AMBA bus should also use of_device_make_bus_id() when populating device out of device tree data. This patch makes the function non-static, and adds a suitable prototype in of_device.h Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of/irq: Fix endian issues in parsing interrupt specifiersGrant Likely1-6/+7
This patch fixes some instances where interrupt specifiers are dereferenced directly instead of doing a be32_to_cpu() conversion first. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: Fix phandle endian issuesGrant Likely3-11/+11
The flat tree code wasn't fixing the endianness on phandle values when unflattening the tree, and the code in drivers/of wasn't always doing a be32_to_cpu before trying to dereference the phandle values. This patch fixes them. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of/flattree: fix of_flat_dt_is_compatible() to match the full compatible stringStuart Yoder1-1/+1
With the current string comparison, a device tree compatible of "foo-bar" would match as compatible with a driver looking for "foo". This patch fixes the function to use the of_compat_cmp() macro so that it does the right thing on all platforms (If sparc ever uses this code, it will still want the strncasecmp() behaviour). Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: remove of_default_bus_idsJonas Bonn1-3/+1
This list used was by only two platforms with all other platforms defining an own list of valid bus id's to pass to of_platform_bus_probe. This patch: i) copies the default list to the two platforms that depended on it (powerpc) ii) remove the usage of of_default_bus_ids in of_platform_bus_probe iii) removes the definition of the list from all architectures that defined it Passing a NULL 'matches' parameter to of_platform_bus_probe is still valid; the function returns no error in that case as the NULL value is equivalent to an empty list. Signed-off-by: Jonas Bonn <jonas@southpole.se> [grant.likely@secretlab.ca: added __initdata annotations, warn on and return error on missing match table, and fix whitespace errors] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: make of_find_device_by_node genericJonas Bonn1-0/+20
There's no need for this function to be architecture specific and all four architectures defining it had the same definition. The function has been moved to drivers/of/platform.c. Signed-off-by: Jonas Bonn <jonas@southpole.se> [grant.likely@secretlab.ca: moved to drivers/of/platform.c, simplified code, and added kerneldoc comment] Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
2010-07-24of/device: Replace of_device with platform_device in includes and core codeGrant Likely2-23/+23
of_device is currently just an #define alias to platform_device until it gets removed entirely. This patch removes references to it from the include directories and the core drivers/of code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
2010-07-24of/device: Protect against binding of_platform_drivers to non-OF devicesGrant Likely1-1/+6
There is an unlikely chance of this situation is occurring, but it is easy to protect against. If a matching entry cannot be found in the of_match_table, then don't bind the driver. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: Merge of_platform_bus_type with platform_bus_typeGrant Likely2-3/+69
of_platform_bus was being used in the same manner as the platform_bus. The only difference being that of_platform_bus devices are generated from data in the device tree, and platform_bus devices are usually statically allocated in platform code. Having them separate causes the problem of device drivers having to be registered twice if it was possible for the same device to appear on either bus. This patch removes of_platform_bus_type and registers all of_platform bus devices and drivers on the platform bus instead. A previous patch made the of_device structure an alias for the platform_device structure, and a shim is used to adapt of_platform_drivers to the platform bus. After all of of_platform_bus drivers are converted to be normal platform drivers, the shim code can be removed. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
2010-07-18of/device: Fix build errors for non-ppc and non-microblazeGrant Likely1-0/+6
Only powerpc and microblaze supply (struct device *)->archdata.dma_mask. This patch stops referencing it on other architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-18of/flattree: Fix crash when device tree absentGrant Likely1-0/+2
This patch fixes the condition where device tree support is compiled in, but no device tree was proved by firmware. It makes of_platform_bus_probe() explicitly check for a NULL device tree pointer. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-14of/flattree: Use common ALIGN() macro instead of arch specific _ALIGNGrant Likely1-10/+10
There's no reason to use the powerpc-specific _ALIGN macro in the fdt code. Replace it with ALIGN() from kernel.h Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-By: Jeremy Kerr <jeremy.kerr@canonical.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-07-14drivers/of: fix build error when CONFIG_PPC_DCR is setGrant Likely1-0/+4
Commit 94c0931983ee9d1cd96c32d52ac64c17464f0bbd (of: Merge of_device_alloc() and of_device_make_bus_id()) moved code that does calls a dcr routine without including the correct header which causes the following build error on some powerpc configurations: drivers/of/platform.c: In function 'of_device_make_bus_id': drivers/of/platform.c:437: error: implicit declaration of function 'of_translate_dcr_address' This patch adds the appropriate header to drivers/of/platform.c Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05proc: unify PROC_DEVICETREE configAndres Salomon1-0/+8
Microblaze and PPC both use PROC_DEVICETREE, and OLPC will as well.. put the Kconfig option into fs/ rather than in arch/*/Kconfig. Signed-off-by: Andres Salomon <dilinger@queued.net> [grant.likely@secretlab.ca: changed depends to PROC_FS && !SPARC] [grant.likely@secretlab.ca: moved to drivers/of/Kconfig] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of: Put all CONFIG_OF dependencies into a Kconfig menu blockGrant Likely1-9/+16
All of the options in drivers/of/Kconfig depend on CONFIG_OF. Putting all of them inside a menu block simplifies the dependency statements. It also creates a logical group for adding user selectable OF options. This patch also changes (PPC_OF || MICROBLAZE) statements to (!SPARC) so that those options are available to other architectures (and in fact the !SPARC conditions should probably be re-evalutated since the code is more generic now) This patch also moves the definition of CONFIG_DTC from arch/* to drivers/of/Kconfig Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of: define CONFIG_OF globally so architectures can select itStephen Rothwell1-0/+3
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of: Fix missing includeGrant Likely1-0/+1
Fix a build failure on ARM Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of: refactor of_modalias_node() and remove explicit match table.Grant Likely1-55/+9
This patch tightens up the behaviour of of_modalias_node() to be more predicatable and to eliminate the explicit of_modalias_tablep[] that is currently used to override the first entry in the compatible list of a device. The override table was needed originally because spi and i2c drivers had no way to do of-style matching. Now that all devices can have an of_node pointer, and all drivers can have an of_match_table, the explicit override table is no longer needed because each driver can specify its own OF-style match data. The mpc8349emitx-mcu driver is modified to explicitly specify the correct device to bind against. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of/i2c: Generalize OF supportGrant Likely2-22/+30
This patch cleans up the i2c OF support code to make it selectable by all architectures and allow for automatic registration of i2c devices. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of/device: Add OF style matching helper functionGrant Likely1-1/+1
Add of_driver_match_device() helper function. This function can be used by bus types to determine if a driver works with a device when using OF style matching. If CONFIG_OF is unselected, then it is a nop. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Greg Kroah-Hartman <gregkh@suse.de> CC: Michal Simek <monstr@monstr.eu> CC: Grant Likely <grant.likely@secretlab.ca> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: linux-kernel@vger.kernel.org CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org CC: devicetree-discuss@lists.ozlabs.org
2010-07-05of/gpio: fix of_gpio includesGrant Likely1-3/+4
drivers/of/gpio.c is missing includes for of_irq and struct device which cause build failures on ARM. This patch adds the correct include files and removes the unneeded kernel.h include Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of/gpio: add default of_xlate function if device has a node pointerAnton Vorontsov1-9/+24
Implement generic OF gpio hooks and thus make device-enabled GPIO chips (i.e. the ones that have gpio_chip->dev specified) automatically attach to the OpenFirmware subsystem. Which means that now we can handle I2C and SPI GPIO chips almost* transparently. * "Almost" because some chips still require platform data, and for these chips OF-glue is still needed, though with this change the glue will be much smaller. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Bill Gatliff <bgat@billgatliff.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jean Delvare <khali@linux-fr.org> Cc: Andrew Morton <akpm@linux-foundation.org> CC: linux-kernel@vger.kernel.org CC: devicetree-discuss@lists.ozlabs.org
2010-07-05of/gpio: stop using device_node data pointer to find gpio_chipGrant Likely1-3/+12
Currently the kernel uses the struct device_node.data pointer to resolve a struct gpio_chip pointer from a device tree node. However, the .data member doesn't provide any type checking and there aren't any rules enforced on what it should be used for. There's no guarantee that the data stored in it actually points to an gpio_chip pointer. Instead of relying on the .data pointer, this patch modifies the code to add a lookup function which scans through the registered gpio_chips and returns the gpio_chip that has a pointer to the specified device_node. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Andrew Morton <akpm@linux-foundation.org> CC: Anton Vorontsov <avorontsov@ru.mvista.com> CC: Grant Likely <grant.likely@secretlab.ca> CC: David Brownell <dbrownell@users.sourceforge.net> CC: Bill Gatliff <bgat@billgatliff.com> CC: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Jean Delvare <khali@linux-fr.org> CC: linux-kernel@vger.kernel.org CC: devicetree-discuss@lists.ozlabs.org
2010-07-05of/gpio: Kill of_gpio_chip and add members directly to gpio_chipAnton Vorontsov1-26/+24
The OF gpio infrastructure is great for describing GPIO connections within the device tree. However, using a GPIO binding still requires changes to the gpio controller just to add an of_gpio structure. In most cases, the gpio controller doesn't actually need any special support and the simple OF gpio mapping function is more than sufficient. Additional, the current scheme of using of_gpio_chip requires a convoluted scheme to maintain 1:1 mappings between of_gpio_chip and gpio_chip instances. If the struct of_gpio_chip data members were moved into struct gpio_chip, then it would simplify the processing of OF gpio bindings, and it would make it trivial to use device tree OF connections on existing gpiolib controller drivers. This patch eliminates the of_gpio_chip structure and moves the relevant fields into struct gpio_chip (conditional on CONFIG_OF_GPIO). This move simplifies the existing code and prepares for adding automatic device tree support to existing drivers. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Bill Gatliff <bgat@billgatliff.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jean Delvare <khali@linux-fr.org>
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