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-rw-r--r--target/linux/ramips/patches-3.8/0006-MIPS-ralink-adds-OF-code.patch133
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
+