diff options
Diffstat (limited to 'arch/arm/mach-mx6/mx6_suspend.S')
| -rw-r--r-- | arch/arm/mach-mx6/mx6_suspend.S | 80 |
1 files changed, 73 insertions, 7 deletions
diff --git a/arch/arm/mach-mx6/mx6_suspend.S b/arch/arm/mach-mx6/mx6_suspend.S index 1987581e56aa..f712700a8e68 100644 --- a/arch/arm/mach-mx6/mx6_suspend.S +++ b/arch/arm/mach-mx6/mx6_suspend.S @@ -233,6 +233,11 @@ wait_for_pll_lock: bic r6, r6, #0x2000000 str r6, [r3, #0x14] +periph_clk_switch1: + ldr r6, [r3, #0x48] + cmp r6, #0 + bne periph_clk_switch1 + /* Set the dividers to default value. */ ldr r6, [r3, #0x14] bic r6, r6, #0x70000 @@ -241,14 +246,9 @@ wait_for_pll_lock: str r6, [r3, #0x14] ahb_podf1: - ldr r0, [r3, #0x48] - cmp r0, #0 - bne ahb_podf1 - -periph_clk_switch1: ldr r6, [r3, #0x48] cmp r6, #0 - bne periph_clk_switch1 + bne ahb_podf1 /* Move MMDC back to PLL2_PFD2_400 */ ldr r6, [r3, #0x14] @@ -262,7 +262,7 @@ mmdc_loop2: /* Set DDR clock to divide by 1. */ ldr r6, [r3, #0x14] - bic r6, r0, #0x38 + bic r6, r6, #0x38 str r6, [r3, #0x14] mmdc_div1: @@ -1099,6 +1099,12 @@ set ddr iomux to low power mode ldr r1, =CCM_BASE_ADDR add r1, r1, #PERIPBASE_VIRT ldr r0, [r1] + ldr r1, =GPC_BASE_ADDR + add r1, r1, #PERIPBASE_VIRT + ldr r0, [r1] + ldr r1, =CCM_BASE_ADDR + add r1, r1, #PERIPBASE_VIRT + ldr r0, [r1] #ifdef CONFIG_MX6_INTER_LDO_BYPASS ldr r1, =ANATOP_BASE_ADDR add r1, r1, #PERIPBASE_VIRT @@ -1173,6 +1179,66 @@ save resume pointer into SRC_GPR1 add r1, r1, #PERIPBASE_VIRT str r3, [r1, #SRC_GPR1_OFFSET] + /* Mask all GPC interrupts before + * enabling the RBC counters to + * avoid the counter starting too + * early if an interupt is already + * pending. + */ + ldr r3, =GPC_BASE_ADDR + add r3, r3, #PERIPBASE_VIRT + ldr r4, [r3, #0x08] + ldr r5, [r3, #0x0c] + ldr r6, [r3, #0x10] + ldr r7, [r3, #0x14] + + ldr r8, =0xffffffff + str r8, [r3, #0x08] + str r8, [r3, #0x0c] + str r8, [r3, #0x10] + str r8, [r3, #0x14] + + /* Enable the RBC bypass counter here + * to hold off the interrupts. + * RBC counter = 32 (1ms) + * Minimum RBC delay should be + * 400us for the analog LDOs to + * power down. + */ + ldr r1, =CCM_BASE_ADDR + add r1, r1, #PERIPBASE_VIRT + ldr r8, [r1, #0x0] + ldr r0, =0x7E00000 + bic r8, r8, r0 + ldr r0, =0x4000000 + orr r8, r8, r0 + str r8, [r1, #0x0] + + /* Enable the counter. */ + ldr r8, [r1, #0x0] + orr r8, r8, #0x8000000 + str r8, [r1, #0x0] + + /* Unmask all the GPC interrupts. */ + str r4, [r3, #0x08] + str r5, [r3, #0x0c] + str r6, [r3, #0x10] + str r7, [r3, #0x14] + + /* Now delay for a short while (3usec) + * ARM is at 1GHz at this point + * so a short loop should be enough. + * This delay is required to ensure that + * the RBC counter can start counting in case an + * interrupt is already pending or in case an interrupt + * arrives just as ARM is about to assert DSM_request. + */ + ldr r4, =2000 +rbc_loop: + sub r4, r4, #0x1 + cmp r4, #0x0 + bne rbc_loop + #ifdef CONFIG_MX6_INTER_LDO_BYPASS ldr r1, =ANATOP_BASE_ADDR add r1, r1, #PERIPBASE_VIRT |