OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

OMAP3 SDRC: Move the clk stabilization delay to the right place 

The clock stabilization delay post a M2 divider change is needed
even before a SDRC interface clock re-enable and not only before
jumping back to SDRAM.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Rajendra Nayak 2009-07-24 19:44:02 -06:00 committed by paul
parent 8ff120e530
commit df56556e57
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/mach-omap2/sram34xx.S
View File

@ -127,6 +127,8 @@ skip_cs1_params:
blne lock_dll
bl sdram_in_selfrefresh @ put SDRAM in self refresh, idle SDRC
bl configure_core_dpll @ change the DPLL3 M2 divider
mov r12, r2
bl wait_clk_stable @ wait for SDRC to stabilize
bl enable_sdrc @ take SDRC out of idle
cmp r1, #SDRC_UNLOCK_DLL @ wait for DLL status to change
bleq wait_dll_unlock
@ -134,8 +136,6 @@ skip_cs1_params:
cmp r3, #1 @ if increasing SDRC clk rate,
beq return_to_sdram @ return to SDRAM code, otherwise,
bl configure_sdrc @ reprogram SDRC regs now
mov r12, r2
bl wait_clk_stable @ wait for SDRC to stabilize
return_to_sdram:
isb @ prevent speculative exec past here
mov r0, #0 @ return value