mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 08:04:13 +08:00
6d2700a95f
request_mem_region returns a NULL pointer on error, comparing it against a number results in a warning: arch/mips/ralink/of.c: In function 'plat_of_remap_node': arch/mips/ralink/of.c:45:15: error: ordered comparison of pointer with integer zero [-Werror=extra] arch/mips/ralink/irq.c: In function 'intc_of_init': arch/mips/ralink/irq.c:167:15: error: ordered comparison of pointer with integer zero [-Werror=extra] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: John Crispin <john@phrozen.org> Cc: Tobias Wolf <dev-NTEO@vplace.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15045/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/*
|
|
* 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 <john@phrozen.org>
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sizes.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 <asm/prom.h>
|
|
|
|
#include "common.h"
|
|
|
|
__iomem void *rt_sysc_membase;
|
|
__iomem void *rt_memc_membase;
|
|
|
|
__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))
|
|
panic("Failed to request resources for %s", node);
|
|
|
|
return ioremap_nocache(res.start, resource_size(&res));
|
|
}
|
|
|
|
void __init device_tree_init(void)
|
|
{
|
|
unflatten_and_copy_device_tree();
|
|
}
|
|
|
|
static int memory_dtb;
|
|
|
|
static int __init early_init_dt_find_memory(unsigned long node,
|
|
const char *uname, int depth, void *data)
|
|
{
|
|
if (depth == 1 && !strcmp(uname, "memory@0"))
|
|
memory_dtb = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init plat_mem_setup(void)
|
|
{
|
|
void *dtb = NULL;
|
|
|
|
set_io_port_base(KSEG1);
|
|
|
|
/*
|
|
* Load the builtin devicetree. This causes the chosen node to be
|
|
* parsed resulting in our memory appearing. fw_passed_dtb is used
|
|
* by CONFIG_MIPS_APPENDED_RAW_DTB as well.
|
|
*/
|
|
if (fw_passed_dtb)
|
|
dtb = (void *)fw_passed_dtb;
|
|
else if (__dtb_start != __dtb_end)
|
|
dtb = (void *)__dtb_start;
|
|
|
|
__dt_setup_arch(dtb);
|
|
|
|
of_scan_flat_dt(early_init_dt_find_memory, NULL);
|
|
if (memory_dtb)
|
|
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
|
|
else if (soc_info.mem_size)
|
|
add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
|
|
BOOT_MEM_RAM);
|
|
else
|
|
detect_memory_region(soc_info.mem_base,
|
|
soc_info.mem_size_min * SZ_1M,
|
|
soc_info.mem_size_max * SZ_1M);
|
|
}
|
|
|
|
static int __init plat_of_setup(void)
|
|
{
|
|
__dt_register_buses(soc_info.compatible, "palmbus");
|
|
|
|
/* make sure that the reset controller is setup early */
|
|
ralink_rst_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(plat_of_setup);
|