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authorRajendra Nayak <rnayak@ti.com>2009-07-24 21:44:02 -0400
committerpaul <paul@twilight.(none)>2009-07-24 22:10:35 -0400
commitdf56556e571234cf26072cd58c01ac3520986b44 (patch)
tree6160ddc198741c1f759f966185a81aceae5966ca /arch
parent8ff120e5303e27e03aba7b774e86fd43eaf90376 (diff)
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-omap2/sram34xx.S4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S
index e6b112590d7d..82aa4a3d160c 100644
--- a/arch/arm/mach-omap2/sram34xx.S
+++ b/arch/arm/mach-omap2/sram34xx.S
@@ -127,6 +127,8 @@ skip_cs1_params:
127 blne lock_dll 127 blne lock_dll
128 bl sdram_in_selfrefresh @ put SDRAM in self refresh, idle SDRC 128 bl sdram_in_selfrefresh @ put SDRAM in self refresh, idle SDRC
129 bl configure_core_dpll @ change the DPLL3 M2 divider 129 bl configure_core_dpll @ change the DPLL3 M2 divider
130 mov r12, r2
131 bl wait_clk_stable @ wait for SDRC to stabilize
130 bl enable_sdrc @ take SDRC out of idle 132 bl enable_sdrc @ take SDRC out of idle
131 cmp r1, #SDRC_UNLOCK_DLL @ wait for DLL status to change 133 cmp r1, #SDRC_UNLOCK_DLL @ wait for DLL status to change
132 bleq wait_dll_unlock 134 bleq wait_dll_unlock
@@ -134,8 +136,6 @@ skip_cs1_params:
134 cmp r3, #1 @ if increasing SDRC clk rate, 136 cmp r3, #1 @ if increasing SDRC clk rate,
135 beq return_to_sdram @ return to SDRAM code, otherwise, 137 beq return_to_sdram @ return to SDRAM code, otherwise,
136 bl configure_sdrc @ reprogram SDRC regs now 138 bl configure_sdrc @ reprogram SDRC regs now
137 mov r12, r2
138 bl wait_clk_stable @ wait for SDRC to stabilize
139return_to_sdram: 139return_to_sdram:
140 isb @ prevent speculative exec past here 140 isb @ prevent speculative exec past here
141 mov r0, #0 @ return value 141 mov r0, #0 @ return value