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authorLokesh Vutla <lokeshvutla@ti.com>2012-05-29 19:26:42 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-07-07 14:07:34 +0200
commit784229cc25feee0bb3f2bba6c1318f4d73c293e0 (patch)
tree51de64df72aa525b099a2c84531de51d351d2609 /arch/arm/cpu
parent702395073fa746f0dcfe6f16f781b4d84645fc40 (diff)
downloadu-boot-linaro-stable-784229cc25feee0bb3f2bba6c1318f4d73c293e0.tar.gz
OMAP4+: Handle sdram init after warm reset
EMIF and DDR device state are preserved in warmreset. Redoing the full initialisation would cause unexpected behaviour. Do only partial initialisation to account for frequency change. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: R Sricharan <r.sricharan@ti.com> Signed-off-by: Senthilvadivu Guruswamy <svadivu@ti.com>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv7/omap-common/emif-common.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
index 23cf6199e..edc63fa9c 100644
--- a/arch/arm/cpu/armv7/omap-common/emif-common.c
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -990,7 +990,7 @@ struct lpddr2_device_details *emif_get_device_details(u32 emif_nr, u8 cs,
return NULL;
/* Do the minimum init for mode register accesses */
- if (!running_from_sdram()) {
+ if (!(running_from_sdram() || warm_reset())) {
phy = get_ddr_phy_ctrl_1(get_sys_clk_freq() / 2, RL_BOOT);
writel(phy, &emif->emif_ddr_phy_ctrl_1);
}
@@ -1070,7 +1070,7 @@ static void do_sdram_init(u32 base)
* Changing the timing registers in EMIF can happen(going from one
* OPP to another)
*/
- if (!in_sdram) {
+ if (!(in_sdram || warm_reset())) {
if (omap_revision() != OMAP5432_ES1_0)
lpddr2_init(base, regs);
else
@@ -1242,7 +1242,7 @@ void sdram_init(void)
in_sdram = running_from_sdram();
debug("in_sdram = %d\n", in_sdram);
- if (!in_sdram) {
+ if (!(in_sdram || warm_reset())) {
if (omap_rev != OMAP5432_ES1_0)
bypass_dpll(&prcm->cm_clkmode_dpll_core);
else
@@ -1252,8 +1252,10 @@ void sdram_init(void)
do_sdram_init(EMIF1_BASE);
do_sdram_init(EMIF2_BASE);
- if (!in_sdram) {
+ if (!in_sdram)
dmm_init(DMM_BASE);
+
+ if (!(in_sdram || warm_reset())) {
emif_post_init_config(EMIF1_BASE);
emif_post_init_config(EMIF2_BASE);
}