diff options
| author | Paul Walmsley <paul@pwsan.com> | 2009-05-12 17:27:09 -0600 |
|---|---|---|
| committer | paul <paul@twilight.(none)> | 2009-05-12 17:27:09 -0600 |
| commit | d75d9e73cd59127a4d926a2bf5e9cdcc90f033d6 (patch) | |
| tree | 4c16d44d6fcf91df6d8b14c92ee389a89b958f7f /arch/arm/mach-omap2/sram34xx.S | |
| parent | 69d4255b139274f71faca28bc93bb49da8eb1a91 (diff) | |
OMAP3 clock: add interconnect barriers to CORE DPLL M2 change
Where necessary, add interconnect barriers to force posted writes to
complete before continuing.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/sram34xx.S')
| -rw-r--r-- | arch/arm/mach-omap2/sram34xx.S | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S index f4a356d5d2d..8d524f30563 100644 --- a/arch/arm/mach-omap2/sram34xx.S +++ b/arch/arm/mach-omap2/sram34xx.S @@ -66,22 +66,23 @@ unlock_dll: ldr r4, omap3_sdrc_dlla_ctrl ldr r5, [r4] orr r5, r5, #0x4 - str r5, [r4] + str r5, [r4] @ (no OCP barrier needed) bx lr lock_dll: ldr r4, omap3_sdrc_dlla_ctrl ldr r5, [r4] bic r5, r5, #0x4 - str r5, [r4] + str r5, [r4] @ (no OCP barrier needed) bx lr sdram_in_selfrefresh: ldr r4, omap3_sdrc_power @ read the SDRC_POWER register ldr r5, [r4] @ read the contents of SDRC_POWER orr r5, r5, #0x40 @ enable self refresh on idle req str r5, [r4] @ write back to SDRC_POWER register + ldr r5, [r4] @ posted-write barrier for SDRC ldr r4, omap3_cm_iclken1_core @ read the CM_ICLKEN1_CORE reg ldr r5, [r4] - bic r5, r5, #0x2 @ disable iclk bit for SRDC + bic r5, r5, #0x2 @ disable iclk bit for SDRC str r5, [r4] wait_sdrc_idle: ldr r4, omap3_cm_idlest1_core @@ -97,6 +98,7 @@ configure_core_dpll: and r5, r5, r6 orr r5, r5, r3, lsl #0x1B @ r3 contains the M2 val str r5, [r4] + ldr r5, [r4] @ posted-write barrier for CM mov r5, #0x800 @ wait for the clock to stabilise cmp r3, #2 bne wait_clk_stable @@ -152,6 +154,7 @@ configure_sdrc: str r1, [r4] ldr r4, omap3_sdrc_actim_ctrlb str r2, [r4] + ldr r2, [r4] @ posted-write barrier for SDRC bx lr omap3_sdrc_power: |