From d75d9e73cd59127a4d926a2bf5e9cdcc90f033d6 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Tue, 12 May 2009 17:27:09 -0600 Subject: [PATCH] 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 --- arch/arm/mach-omap2/sram34xx.S | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S index f4a356d5d2d8..8d524f305633 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: -- 2.39.5