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From 071e97587a291d3a5bbd614a425f46b7f90310aa Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sun, 16 Mar 2014 04:40:48 +0000
Subject: [PATCH 08/57] MIPS: ralink: allow manual memory override
RT5350 relies on the bootloader setting up the memc correctly.
On sme boards the setup is incorrect leading to 32 MB being available but only 16 being recognized. Allow these boards to manually override the memory range
.
Signed-off-by: John Crispin <blogic@openwrt.org>
---
arch/mips/ralink/of.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -78,6 +78,17 @@ void __init device_tree_init(void)
free_bootmem(base, size);
}
+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)
{
set_io_port_base(KSEG1);
@@ -88,7 +99,10 @@ void __init plat_mem_setup(void)
*/
__dt_setup_arch(&__dtb_start);
- if (soc_info.mem_size)
+ 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
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