forked from Minki/linux
10d0c9705e
usual for this cycle with lots of clean-up.
- Cross arch clean-up and consolidation of early DT scanning code.
- Clean-up and removal of arch prom.h headers. Makes arch specific
prom.h optional on all but Sparc.
- Addition of interrupts-extended property for devices connected to
multiple interrupt controllers.
- Refactoring of DT interrupt parsing code in preparation for deferred
probe of interrupts.
- ARM cpu and cpu topology bindings documentation.
- Various DT vendor binding documentation updates.
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Merge tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring:
"DeviceTree updates for 3.13. This is a bit larger pull request than
usual for this cycle with lots of clean-up.
- Cross arch clean-up and consolidation of early DT scanning code.
- Clean-up and removal of arch prom.h headers. Makes arch specific
prom.h optional on all but Sparc.
- Addition of interrupts-extended property for devices connected to
multiple interrupt controllers.
- Refactoring of DT interrupt parsing code in preparation for
deferred probe of interrupts.
- ARM cpu and cpu topology bindings documentation.
- Various DT vendor binding documentation updates"
* tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits)
powerpc: add missing explicit OF includes for ppc
dt/irq: add empty of_irq_count for !OF_IRQ
dt: disable self-tests for !OF_IRQ
of: irq: Fix interrupt-map entry matching
MIPS: Netlogic: replace early_init_devtree() call
of: Add Panasonic Corporation vendor prefix
of: Add Chunghwa Picture Tubes Ltd. vendor prefix
of: Add AU Optronics Corporation vendor prefix
of/irq: Fix potential buffer overflow
of/irq: Fix bug in interrupt parsing refactor.
of: set dma_mask to point to coherent_dma_mask
of: add vendor prefix for PHYTEC Messtechnik GmbH
DT: sort vendor-prefixes.txt
of: Add vendor prefix for Cadence
of: Add empty for_each_available_child_of_node() macro definition
arm/versatile: Fix versatile irq specifications.
of/irq: create interrupts-extended property
microblaze/pci: Drop PowerPC-ism from irq parsing
of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code.
of/irq: Use irq_of_parse_and_map()
...
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
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*/
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/init.h>
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#include <linux/sizes.h>
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#include <linux/of_fdt.h>
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#include <linux/kernel.h>
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#include <linux/bootmem.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <asm/reboot.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/prom.h>
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#include "common.h"
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__iomem void *rt_sysc_membase;
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__iomem void *rt_memc_membase;
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extern struct boot_param_header __dtb_start;
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__iomem void *plat_of_remap_node(const char *node)
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{
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struct resource res;
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, node);
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if (!np)
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panic("Failed to find %s node", node);
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if (of_address_to_resource(np, 0, &res))
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panic("Failed to get resource for %s", node);
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if ((request_mem_region(res.start,
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resource_size(&res),
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res.name) < 0))
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panic("Failed to request resources for %s", node);
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return ioremap_nocache(res.start, resource_size(&res));
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}
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void __init device_tree_init(void)
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{
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unsigned long base, size;
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void *fdt_copy;
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if (!initial_boot_params)
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return;
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base = virt_to_phys((void *)initial_boot_params);
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size = be32_to_cpu(initial_boot_params->totalsize);
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/* Before we do anything, lets reserve the dt blob */
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reserve_bootmem(base, size, BOOTMEM_DEFAULT);
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/* The strings in the flattened tree are referenced directly by the
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* device tree, so copy the flattened device tree from init memory
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* to regular memory.
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*/
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fdt_copy = alloc_bootmem(size);
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memcpy(fdt_copy, initial_boot_params, size);
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initial_boot_params = fdt_copy;
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unflatten_device_tree();
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/* free the space reserved for the dt blob */
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free_bootmem(base, size);
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}
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void __init plat_mem_setup(void)
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{
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set_io_port_base(KSEG1);
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/*
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* Load the builtin devicetree. This causes the chosen node to be
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* parsed resulting in our memory appearing
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*/
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__dt_setup_arch(&__dtb_start);
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if (soc_info.mem_size)
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add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
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BOOT_MEM_RAM);
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else
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detect_memory_region(soc_info.mem_base,
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soc_info.mem_size_min * SZ_1M,
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soc_info.mem_size_max * SZ_1M);
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}
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static int __init plat_of_setup(void)
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{
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static struct of_device_id of_ids[3];
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int len = sizeof(of_ids[0].compatible);
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if (!of_have_populated_dt())
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panic("device tree not present");
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strlcpy(of_ids[0].compatible, soc_info.compatible, len);
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strncpy(of_ids[1].compatible, "palmbus", len);
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if (of_platform_populate(NULL, of_ids, NULL, NULL))
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panic("failed to populate DT");
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/* make sure ithat the reset controller is setup early */
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ralink_rst_init();
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return 0;
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}
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arch_initcall(plat_of_setup);
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