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authorMarek Vasut <marex@denx.de>2012-05-29 19:43:13 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-07-07 14:07:29 +0200
commite3ddc646031551627c4eeae4598f8862251a3f94 (patch)
tree032ac5adc0dc06de2177b590c636058f49c28748
parenteeacb73b8e0823b400eda5022e56e9f5a59b37a0 (diff)
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i.MX28: Add function to adjust memory parameters
This function can be overridden at run-time and allows implementors of new boards based on the i.MX28 chip to fine-tune the memory params. It is possible to write into the dram_vals array because when the SPL runs, it is located SRAM. Therefore the location is writable. There is no possibility of these data to be read-only. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Wolfgang Denk <wd@denx.de> Cc: Detlev Zundel <dzu@denx.de> Cc: Stefano Babic <sbabic@denx.de> Cc: Fabio Estevam <festevam@gmail.com>
-rw-r--r--arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c
index 9fa5d29..e17a4d7 100644
--- a/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c
+++ b/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c
@@ -82,10 +82,18 @@ uint32_t dram_vals[] = {
0x00000000, 0x00010001
};
+void __mx28_adjust_memory_params(uint32_t *dram_vals)
+{
+}
+void mx28_adjust_memory_params(uint32_t *dram_vals)
+ __attribute__((weak, alias("__mx28_adjust_memory_params")));
+
void init_m28_200mhz_ddr2(void)
{
int i;
+ mx28_adjust_memory_params(dram_vals);
+
for (i = 0; i < ARRAY_SIZE(dram_vals); i++)
writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
}