diff options
Diffstat (limited to 'target/linux/ramips/patches-3.8/0006-MIPS-ralink-adds-OF-code.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.8/0006-MIPS-ralink-adds-OF-code.patch | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.8/0006-MIPS-ralink-adds-OF-code.patch b/target/linux/ramips/patches-3.8/0006-MIPS-ralink-adds-OF-code.patch new file mode 100644 index 0000000000..d8b632d708 --- /dev/null +++ b/target/linux/ramips/patches-3.8/0006-MIPS-ralink-adds-OF-code.patch @@ -0,0 +1,133 @@ +From 3a5bfe7bdbfd37c9206d7c6dfd7eb9664ccc5038 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Sun, 20 Jan 2013 22:02:01 +0100 +Subject: [PATCH 06/14] MIPS: ralink: adds OF code + +Until there is a generic MIPS way of handing the DTB over from bootloader to +kernel we rely on a built in devicetrees. The OF code also remaps those register +ranges that we use global in our drivers. + +Signed-off-by: John Crispin <blogic@openwrt.org> +Signed-off-by: Gabor Juhos <juhosg@openwrt.org> +Patchwork: http://patchwork.linux-mips.org/patch/4895/ +--- + arch/mips/ralink/of.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 107 insertions(+) + create mode 100644 arch/mips/ralink/of.c + +diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c +new file mode 100644 +index 0000000..4165e70 +--- /dev/null ++++ b/arch/mips/ralink/of.c +@@ -0,0 +1,107 @@ ++/* ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ * ++ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> ++ * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org> ++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org> ++ */ ++ ++#include <linux/io.h> ++#include <linux/clk.h> ++#include <linux/init.h> ++#include <linux/of_fdt.h> ++#include <linux/kernel.h> ++#include <linux/bootmem.h> ++#include <linux/of_platform.h> ++#include <linux/of_address.h> ++ ++#include <asm/reboot.h> ++#include <asm/bootinfo.h> ++#include <asm/addrspace.h> ++ ++#include "common.h" ++ ++__iomem void *rt_sysc_membase; ++__iomem void *rt_memc_membase; ++ ++extern struct boot_param_header __dtb_start; ++ ++__iomem void *plat_of_remap_node(const char *node) ++{ ++ struct resource res; ++ struct device_node *np; ++ ++ np = of_find_compatible_node(NULL, NULL, node); ++ if (!np) ++ panic("Failed to find %s node", node); ++ ++ if (of_address_to_resource(np, 0, &res)) ++ panic("Failed to get resource for %s", node); ++ ++ if ((request_mem_region(res.start, ++ resource_size(&res), ++ res.name) < 0)) ++ panic("Failed to request resources for %s", node); ++ ++ return ioremap_nocache(res.start, resource_size(&res)); ++} ++ ++void __init device_tree_init(void) ++{ ++ unsigned long base, size; ++ void *fdt_copy; ++ ++ if (!initial_boot_params) ++ return; ++ ++ base = virt_to_phys((void *)initial_boot_params); ++ size = be32_to_cpu(initial_boot_params->totalsize); ++ ++ /* Before we do anything, lets reserve the dt blob */ ++ reserve_bootmem(base, size, BOOTMEM_DEFAULT); ++ ++ /* The strings in the flattened tree are referenced directly by the ++ * device tree, so copy the flattened device tree from init memory ++ * to regular memory. ++ */ ++ fdt_copy = alloc_bootmem(size); ++ memcpy(fdt_copy, initial_boot_params, size); ++ initial_boot_params = fdt_copy; ++ ++ unflatten_device_tree(); ++ ++ /* free the space reserved for the dt blob */ ++ free_bootmem(base, size); ++} ++ ++void __init plat_mem_setup(void) ++{ ++ set_io_port_base(KSEG1); ++ ++ /* ++ * Load the builtin devicetree. This causes the chosen node to be ++ * parsed resulting in our memory appearing ++ */ ++ __dt_setup_arch(&__dtb_start); ++} ++ ++static int __init plat_of_setup(void) ++{ ++ static struct of_device_id of_ids[3]; ++ int len = sizeof(of_ids[0].compatible); ++ ++ if (!of_have_populated_dt()) ++ panic("device tree not present"); ++ ++ strncpy(of_ids[0].compatible, soc_info.compatible, len); ++ strncpy(of_ids[1].compatible, "palmbus", len); ++ ++ if (of_platform_populate(NULL, of_ids, NULL, NULL)) ++ panic("failed to populate DT\n"); ++ ++ return 0; ++} ++ ++arch_initcall(plat_of_setup); +-- +1.7.10.4 + |