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path: root/include/linux/of_fdt.h
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2019-05-24of/fdt: Remove dead code and mark functions with __initStephen Boyd
Some functions in here are never called, and others are only called during __init. Remove the dead code and some dead exports for functions that don't exist (I'm looking at you of_fdt_get_string!). Mark some functions with __init so we can throw them away after we boot up and poke at the FDT blob too. Cc: Hsin-Yi Wang <hsinyi@chromium.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Rob Herring <robh@kernel.org>
2018-11-23x86/headers: Fix -Wmissing-prototypes warningYi Wang
When building the kernel with W=1 we get a lot of -Wmissing-prototypes warnings, which are trivial in nature and easy to fix - and which may mask some real future bugs if the prototypes get out of sync with the function definition. This patch fixes most of -Wmissing-prototypes warnings which are in the root directory of arch/x86/kernel, not including the subdirectories. These are the warnings fixed in this patch: arch/x86/kernel/signal.c:865:17: warning: no previous prototype for ‘sys32_x32_rt_sigreturn’ [-Wmissing-prototypes] arch/x86/kernel/signal_compat.c:164:6: warning: no previous prototype for ‘sigaction_compat_abi’ [-Wmissing-prototypes] arch/x86/kernel/traps.c:625:46: warning: no previous prototype for ‘sync_regs’ [-Wmissing-prototypes] arch/x86/kernel/traps.c:640:24: warning: no previous prototype for ‘fixup_bad_iret’ [-Wmissing-prototypes] arch/x86/kernel/traps.c:929:13: warning: no previous prototype for ‘trap_init’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:270:28: warning: no previous prototype for ‘smp_x86_platform_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:301:16: warning: no previous prototype for ‘smp_kvm_posted_intr_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:314:16: warning: no previous prototype for ‘smp_kvm_posted_intr_wakeup_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq.c:328:16: warning: no previous prototype for ‘smp_kvm_posted_intr_nested_ipi’ [-Wmissing-prototypes] arch/x86/kernel/irq_work.c:16:28: warning: no previous prototype for ‘smp_irq_work_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/irqinit.c:79:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes] arch/x86/kernel/quirks.c:672:13: warning: no previous prototype for ‘early_platform_quirks’ [-Wmissing-prototypes] arch/x86/kernel/tsc.c:1499:15: warning: no previous prototype for ‘calibrate_delay_is_known’ [-Wmissing-prototypes] arch/x86/kernel/process.c:653:13: warning: no previous prototype for ‘arch_post_acpi_subsys_init’ [-Wmissing-prototypes] arch/x86/kernel/process.c:717:15: warning: no previous prototype for ‘arch_randomize_brk’ [-Wmissing-prototypes] arch/x86/kernel/process.c:784:6: warning: no previous prototype for ‘do_arch_prctl_common’ [-Wmissing-prototypes] arch/x86/kernel/reboot.c:869:6: warning: no previous prototype for ‘nmi_panic_self_stop’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:176:27: warning: no previous prototype for ‘smp_reboot_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:260:28: warning: no previous prototype for ‘smp_reschedule_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:281:28: warning: no previous prototype for ‘smp_call_function_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/smp.c:291:28: warning: no previous prototype for ‘smp_call_function_single_interrupt’ [-Wmissing-prototypes] arch/x86/kernel/ftrace.c:840:6: warning: no previous prototype for ‘arch_ftrace_update_trampoline’ [-Wmissing-prototypes] arch/x86/kernel/ftrace.c:934:7: warning: no previous prototype for ‘arch_ftrace_trampoline_func’ [-Wmissing-prototypes] arch/x86/kernel/ftrace.c:946:6: warning: no previous prototype for ‘arch_ftrace_trampoline_free’ [-Wmissing-prototypes] arch/x86/kernel/crash.c:114:6: warning: no previous prototype for ‘crash_smp_send_stop’ [-Wmissing-prototypes] arch/x86/kernel/crash.c:351:5: warning: no previous prototype for ‘crash_setup_memmap_entries’ [-Wmissing-prototypes] arch/x86/kernel/crash.c:424:5: warning: no previous prototype for ‘crash_load_segments’ [-Wmissing-prototypes] arch/x86/kernel/machine_kexec_64.c:372:7: warning: no previous prototype for ‘arch_kexec_kernel_image_load’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:12:16: warning: no previous prototype for ‘__native_queued_spin_unlock’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:18:6: warning: no previous prototype for ‘pv_is_native_spin_unlock’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:24:16: warning: no previous prototype for ‘__native_vcpu_is_preempted’ [-Wmissing-prototypes] arch/x86/kernel/paravirt-spinlocks.c:30:6: warning: no previous prototype for ‘pv_is_native_vcpu_is_preempted’ [-Wmissing-prototypes] arch/x86/kernel/kvm.c:258:1: warning: no previous prototype for ‘do_async_page_fault’ [-Wmissing-prototypes] arch/x86/kernel/jailhouse.c:200:6: warning: no previous prototype for ‘jailhouse_paravirt’ [-Wmissing-prototypes] arch/x86/kernel/check.c:91:13: warning: no previous prototype for ‘setup_bios_corruption_check’ [-Wmissing-prototypes] arch/x86/kernel/check.c:139:6: warning: no previous prototype for ‘check_for_bios_corruption’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:32:13: warning: no previous prototype for ‘early_init_dt_scan_chosen_arch’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:42:13: warning: no previous prototype for ‘add_dtb’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:108:6: warning: no previous prototype for ‘x86_of_pci_init’ [-Wmissing-prototypes] arch/x86/kernel/devicetree.c:314:13: warning: no previous prototype for ‘x86_dtb_init’ [-Wmissing-prototypes] arch/x86/kernel/tracepoint.c:16:5: warning: no previous prototype for ‘trace_pagefault_reg’ [-Wmissing-prototypes] arch/x86/kernel/tracepoint.c:22:6: warning: no previous prototype for ‘trace_pagefault_unreg’ [-Wmissing-prototypes] arch/x86/kernel/head64.c:113:22: warning: no previous prototype for ‘__startup_64’ [-Wmissing-prototypes] arch/x86/kernel/head64.c:262:15: warning: no previous prototype for ‘__startup_secondary_64’ [-Wmissing-prototypes] arch/x86/kernel/head64.c:350:12: warning: no previous prototype for ‘early_make_pgtable’ [-Wmissing-prototypes] [ mingo: rewrote the changelog, fixed build errors. ] Signed-off-by: Yi Wang <wang.yi59@zte.com.cn> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akataria@vmware.com Cc: akpm@linux-foundation.org Cc: andy.shevchenko@gmail.com Cc: anton@enomsg.org Cc: ard.biesheuvel@linaro.org Cc: bhe@redhat.com Cc: bhelgaas@google.com Cc: bp@alien8.de Cc: ccross@android.com Cc: devicetree@vger.kernel.org Cc: douly.fnst@cn.fujitsu.com Cc: dwmw@amazon.co.uk Cc: dyoung@redhat.com Cc: ebiederm@xmission.com Cc: frank.rowand@sony.com Cc: frowand.list@gmail.com Cc: ivan.gorinov@intel.com Cc: jailhouse-dev@googlegroups.com Cc: jan.kiszka@siemens.com Cc: jgross@suse.com Cc: jroedel@suse.de Cc: keescook@chromium.org Cc: kexec@lists.infradead.org Cc: konrad.wilk@oracle.com Cc: kvm@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: luto@kernel.org Cc: m.mizuma@jp.fujitsu.com Cc: namit@vmware.com Cc: oleg@redhat.com Cc: pasha.tatashin@oracle.com Cc: pbonzini@redhat.com Cc: prarit@redhat.com Cc: pravin.shedge4linux@gmail.com Cc: rajvi.jingar@intel.com Cc: rkrcmar@redhat.com Cc: robh+dt@kernel.org Cc: robh@kernel.org Cc: rostedt@goodmis.org Cc: takahiro.akashi@linaro.org Cc: thomas.lendacky@amd.com Cc: tony.luck@intel.com Cc: up2wing@gmail.com Cc: virtualization@lists.linux-foundation.org Cc: zhe.he@windriver.com Cc: zhong.weidong@zte.com.cn Link: http://lkml.kernel.org/r/1542852249-19820-1-git-send-email-wang.yi59@zte.com.cn Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-08of/fdt: use memblock_virt_alloc for early allocRob Herring
memblock_virt_alloc() works for both memblock and bootmem, so use it and make early_init_dt_alloc_memory_arch a static function. The arches using bootmem define early_init_dt_alloc_memory_arch as either: __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS)) or: alloc_bootmem_align(size, align) Both of these evaluate to the same thing as does memblock_virt_alloc for bootmem. So we can disable the arch specific functions by making early_init_dt_alloc_memory_arch static and they can be removed in subsequent commits. Cc: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
2018-01-08of: Use SPDX license tag for DT filesRob Herring
Convert remaining DT files to use SPDX-License-Identifier tags. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Reviewed-by: Frank Rowand <frank.rowand@sony.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Rob Herring <robh@kernel.org>
2018-01-05of/fdt: Fix #ifdef dependency of early flattree declarationsGeert Uytterhoeven
If OF_FLATTREE=y, but OF_EARLY_FLATTREE=n: drivers/tty/serial/earlycon.o: In function `param_setup_earlycon': earlycon.c:(.init.text+0x3a4): undefined reference to `early_init_dt_scan_chosen_stdout' Fix this by moving the early flattree forward declarations and dummy implementations inside an #ifdef CONFIG_OF_EARLY_FLATTREE block. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2017-06-22of: make of_fdt_is_compatible() staticFrank Rowand
The callers of of_fdt_is_compatible() are all in fdt.c so make it static. Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
2017-05-09of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandleNicholas Piggin
Introduce primitives for FDT parsing. These will be used for powerpc cpufeatures node scanning, which has quite complex structure but should be processed early. Cc: devicetree@vger.kernel.org Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-12-12of/fdt: mark hotpluggable memoryReza Arbab
When movable nodes are enabled, any node containing only hotpluggable memory is made movable at boot time. On x86, hotpluggable memory is discovered by parsing the ACPI SRAT, making corresponding calls to memblock_mark_hotplug(). If we introduce a dt property to describe memory as hotpluggable, configs supporting early fdt may then also do this marking and use movable nodes. Link: http://lkml.kernel.org/r/1479160961-25840-5-git-send-email-arbab@linux.vnet.ibm.com Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com> Tested-by: Balbir Singh <bsingharora@gmail.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Alistair Popple <apopple@au1.ibm.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Bharata B Rao <bharata@linux.vnet.ibm.com> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Stewart Smith <stewart@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-28of/serial: move earlycon early_param handling to serialLeif Lindholm
We have multiple "earlycon" early_param handlers - merge the DT one into the main earlycon one. It's a cleanup that also will be useful to defer setting up DT console until ACPI/DT decision is made. Rename the exported function to avoid clashing with the function from arch/microblaze/kernel/prom.c Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: Christopher Covington <cov@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-07-06FDT: Add a helper to get the subnode by given nameShannon Zhao
Sometimes it needs to check if there is a subnode of given node in FDT by given name. Introduce this helper to get the subnode if it exists. CC: Rob Herring <robh@kernel.org> Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Rob Herring <robh@kernel.org> Tested-by: Julien Grall <julien.grall@arm.com>
2016-05-16drivers/of: Return allocated memory from of_fdt_unflatten_tree()Gavin Shan
This returns the allocate memory chunk, storing the unflattened device tree, from of_fdt_unflatten_tree() so that memory chunk can be released on demand in PowerNV PCI hotplug driver. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Rob Herring <robh@kernel.org>
2016-05-16drivers/of: Specify parent node in of_fdt_unflatten_tree()Gavin Shan
This adds one more argument to of_fdt_unflatten_tree() to specify the parent node of the FDT blob that is going to be unflattened. In the result, the function can be used to unflatten FDT blob that represents device sub-tree in PowerNV PCI hotplug driver. Cc: Jyri Sarha <jsarha@ti.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Jyri Sarha <jsarha@ti.com> Signed-off-by: Rob Herring <robh@kernel.org>
2016-02-06of: earlycon: Move address translation to of_setup_earlycon()Peter Hurley
Cleanup the early DT/earlycon separation; remove the 'addr' parameter from of_setup_earlycon() and get the uart phys addr directly with a new wrapper function, of_flat_dt_translate_addr(). Limit fdt_translate_address() to file scope. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-07-01Merge tag 'devicetree-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux Pull devicetree updates from Grant Likely: "A whole lot of bug fixes. Nothing stands out here except the ability to enable CONFIG_OF on every architecture, and an import of a newer version of dtc" * tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (22 commits) of/irq: Rename "intc_desc" to "of_intc_desc" to fix OF on sh of/irq: Fix pSeries boot failure Documentation: DT: Fix a typo in the filename "lantiq,<chip>-pinumx.txt" of: define of_find_node_by_phandle for !CONFIG_OF of/address: use atomic allocation in pci_register_io_range() of: Add vendor prefix for Zodiac Inflight Innovations dt/fdt: add empty versions of early_init_dt_*_memory_arch of: clean-up unnecessary libfdt include paths of: make unittest select OF_EARLY_FLATTREE instead of depend on it of: make CONFIG_OF user selectable MIPS: prepare for user enabling of CONFIG_OF of/fdt: fix argument name and add comments of unflatten_dt_node() of: return NUMA_NO_NODE from fallback of_node_to_nid() tps6507x.txt: Remove executable permission of/overlay: Grammar s/an negative/a negative/ of/fdt: Make fdt blob input parameters of unflatten functions const of: add helper function to retrive match data of: Grammar s/property exist/property exists/ of: Move OF flags to be visible even when !CONFIG_OF scripts/dtc: Update to upstream version 9d3649bd3be245c9 ...
2015-06-02of/fdt: split off FDT self reservation from memreserve processingArd Biesheuvel
This splits off the reservation of the memory occupied by the FDT binary itself from the processing of the memory reservations it contains. This is necessary because the physical address of the FDT, which is needed to perform the reservation, may not be known to the FDT driver core, i.e., it may be mapped outside the linear direct mapping, in which case __pa() returns a bogus value. Cc: Russell King <linux@arm.linux.org.uk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-05-28of/fdt: Make fdt blob input parameters of unflatten functions constGeert Uytterhoeven
Operations to unflatten fdt blobs never modify the input blobs, hence make them const. Now we no longer need to cast arbitrary const data to "void *" when calling of_fdt_unflatten_tree(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2015-04-14of/fdt: Add endianness helper function for early init codeKevin Cernekee
Provide a libfdt-based equivalent for of_device_is_big_endian(), suitable for use in the early_init_* functions. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rob Herring <robh@kernel.org>
2014-07-29of: Add memory limiting function for flattened devicetreesLaura Abbott
Buggy bootloaders may pass bogus memory entries in the devicetree. Add of_fdt_limit_memory to add an upper bound on the number of entries that can be present in the devicetree. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-29of: Split early_init_dt_scan into two partsLaura Abbott
Currently, early_init_dt_scan validates the header, sets the boot params, and scans for chosen/memory all in one function. Split this up into two separate functions (validation/setting boot params in one, scanning in another) to allow for additional setup between boot params and scanning the memory. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> [glikely: s/early_init_dt_scan_all/early_init_dt_scan_nodes/] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-05-20of/fdt: add FDT address translation supportRob Herring
Copy u-boot's FDT address translation code from common/fdt_support. This code was originally based on the kernel's unflattened DT address parsing code. This commit can be reverted once relicensing of this code to GPLv2/BSD is done and it is added to libfdt. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-04-30of: push struct boot_param_header and defines into powerpcRob Herring
Now powerpc is the only user of struct boot_param_header and FDT defines, so they can be moved into the powerpc architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: convert initial_boot_params to opaque pointerRob Herring
Now that all accesses to FDT header data has been converted to accessor helpers, initial_boot_params can become an opaque pointer. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: introduce of_get_flat_dt_sizeRob Herring
Add a wrapper function to retrieve the FDT size from the FDT header. This is primarily to avoid libfdt include paths for the whole kernel. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: use libfdt accessors for header dataRob Herring
With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: Convert FDT functions to use libfdtRob Herring
The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: update of_get_flat_dt_prop in prep for libfdtRob Herring
Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: remove unused of_scan_flat_dt_by_pathRob Herring
of_scan_flat_dt_by_path is unused anywhere in the kernel, so remove it. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-30of/fdt: consolidate built-in dtb section variablesRob Herring
Unify the various architectures __dtb_start and __dtb_end definitions moving them into of_fdt.h. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: James Hogan <james.hogan@imgtec.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-metag@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-xtensa@linux-xtensa.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-03-11drivers: of: add initialization code for static reserved memoryMarek Szyprowski
This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-01-09powerpc: introduce early_get_first_memblock_infoKevin Hao
For a relocatable kernel since it can be loaded at any place, there is no any relation between the kernel start addr and the memstart_addr. So we can't calculate the memstart_addr from kernel start addr. And also we can't wait to do the relocation after we get the real memstart_addr from device tree because it is so late. So introduce a new function we can use to get the first memblock address and size in a very early stage (before machine_init). Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
2013-10-09of: introduce common FDT machine related functionsRob Herring
Introduce common of_flat_dt_match_machine and of_flat_dt_get_machine_name functions to unify architectures' handling of machine level model and compatible properties. Several architectures match the root compatible string with an arch specific list of machine descriptors duplicating the same search algorithm. Create a common implementation with a simple architecture specific hook to iterate over each machine's match table. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-10-09of: remove early_init_dt_setup_initrd_archRob Herring
All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-10-09of: Introduce common early_init_dt_scanRob Herring
Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-10-09of: create unflatten_and_copy_device_treeRob Herring
Several architectures using DT support built-in dtb's in the init section. These platforms need to copy the dtb from init since the strings are referenced after unflattening. Every arch has their own copying routine which do the same thing. Create a common function, unflatten_and_copy_device_tree, to copy the dtb when unflattening the dtb. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-09-10Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds
Pull device tree core updates from Grant Likely: "Generally minor changes. A bunch of bug fixes, particularly for initialization and some refactoring. Most notable change if feeding the entire flattened tree into the random pool at boot. May not be significant, but shouldn't hurt either" Tim Bird questions whether the boot time cost of the random feeding may be noticeable. And "add_device_randomness()" is definitely not some speed deamon of a function. * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: of/platform: add error reporting to of_amba_device_create() irq/of: Fix comment typo for irq_of_parse_and_map of: Feed entire flattened device tree into the random pool of/fdt: Clean up casting in unflattening path of/fdt: Remove duplicate memory clearing on FDT unflattening gpio: implement gpio-ranges binding document fix of: call __of_parse_phandle_with_args from of_parse_phandle of: introduce of_parse_phandle_with_fixed_args of: move of_parse_phandle() of: move documentation of of_parse_phandle_with_args of: Fix missing memory initialization on FDT unflattening of: consolidate definition of early_init_dt_alloc_memory_arch() of: Make of_get_phy_mode() return int i.s.o. const int include: dt-binding: input: create a DT header defining key codes. of/platform: Staticize of_platform_device_create_pdata() of: Specify initrd location using 64-bit dt: Typo fix OF: make of_property_for_each_{u32|string}() use parameters if OF is not enabled
2013-08-27drivers: of: add function to scan fdt nodes given by pathMarek Szyprowski
Add a function to scan the flattened device-tree starting from the node given by the path. It is used to extract information (like reserved memory), which is required on early boot before we can unflatten the tree. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Acked-by: Tomasz Figa <t.figa@samsung.com> Reviewed-by: Rob Herring <rob.herring@calxeda.com>
2013-07-24of: Specify initrd location using 64-bitSantosh Shilimkar
On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2011-12-27ARM/of: allow *machine_desc.dt_compat to be constUwe Kleine-König
This allows dt_compat to point to a constant list of compatible strings. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2011-08-04Revert "dt: add of_alias_scan and of_alias_get_id"Grant Likely
This reverts commit 750f463a749e28464151ad26938d11b07b1c43cb. of_alias_* still needs work to be generalized for 'promtree' dt platforms, and to no implicitly create entries for available ids. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-03dt: add of_alias_scan and of_alias_get_idShawn Guo
The patch adds function of_alias_scan to populate a global lookup table with the properties of 'aliases' node and function of_alias_get_id for drivers to find alias id from the lookup table. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> [grant.likely: add locking and rework parse loop] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-15dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch()Grant Likely
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>
2011-01-08of/flattree: forward declare struct device_node in of_fdt.hGrant Likely
This patch forward declares struct device_node to fix a compile error when of_fdt.h is included, but of.h is not. Alternately, including linux/of.h could have been added to of_fdt.h, but that pulls in a lot of unnecessary declarations when only working with the flattened form. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-01of/flattree: Add of_flat_dt_match() helper functionGrant Likely
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 Neuendorffer
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: Add non-boottime device tree functionsStephen Neuendorffer
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>
2010-10-21of/flattree: Eliminate need to provide early_init_dt_scan_chosen_archGrant Likely
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>
2010-04-28of/flattree: Make unflatten_device_tree() safe to call from any archGrant Likely
This patch makes unflatten_device_tree() safe to call from any arch setup code with the following changes: - Make sure initial_boot_params actually points to a device tree blob before unflattening - Make sure the initial_boot_params->magic field is correct - If CONFIG_OF_FLATTREE is not set, then make unflatten_device_tree() an empty static inline function. This patch also adds some additional debug output to the top of unflatten_device_tree(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-04-28of/flattree: make of_fdt.h safe to unconditionally include.Grant Likely
If CONFIG_OF_FLATTREE is not set, then don't process the body of linux/of_fdt.h Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-14of/flattree: Don't assume HAVE_LMBJeremy Kerr
We don't always have lmb available, so make arches provide an early_init_dt_alloc_memory_arch() to handle the allocation of memory in the fdt code. When we don't have lmb.h included, we need asm/page.h for __va. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-14of: Remove old and misplaced function declarationsGrant Likely
The following functions don't exist: finish_device_tree() print_properties() prom_n_intr_cells() prom_get_irq_senses() The following functions are in drivers/of/base.c, so the declaration belongs in of.h instead of of_fdt.h of_machine_is_compatible() prom_add_property() prom_remove_property() prom_update_property() Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu>