diff options
Diffstat (limited to 'arch/arm/mach-tegra/sleep-tegra30.S')
| -rw-r--r-- | arch/arm/mach-tegra/sleep-tegra30.S | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S index d29dfcce948..ada8821b48b 100644 --- a/arch/arm/mach-tegra/sleep-tegra30.S +++ b/arch/arm/mach-tegra/sleep-tegra30.S @@ -19,6 +19,7 @@ #include <asm/assembler.h> #include <asm/asm-offsets.h> +#include "fuse.h" #include "sleep.h" #include "flowctrl.h" @@ -43,14 +44,19 @@ ENDPROC(tegra30_hotplug_shutdown) * * Puts the current CPU in wait-for-event mode on the flow controller * and powergates it -- flags (in R0) indicate the request type. - * Must never be called for CPU 0. * - * corrupts r0-r4, r12 + * r10 = SoC ID + * corrupts r0-r4, r10-r12 */ ENTRY(tegra30_cpu_shutdown) cpu_id r3 + tegra_get_soc_id TEGRA_APB_MISC_VIRT, r10 + cmp r10, #TEGRA30 + bne _no_cpu0_chk @ It's not Tegra30 + cmp r3, #0 moveq pc, lr @ Must never be called for CPU 0 +_no_cpu0_chk: ldr r12, =TEGRA_FLOW_CTRL_VIRT cpu_to_csr_reg r1, r3 @@ -65,7 +71,9 @@ ENTRY(tegra30_cpu_shutdown) movw r12, \ FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG | \ FLOW_CTRL_CSR_ENABLE - mov r4, #(1 << 4) + cmp r10, #TEGRA30 + moveq r4, #(1 << 4) @ wfe bitmap + movne r4, #(1 << 8) @ wfi bitmap ARM( orr r12, r12, r4, lsl r3 ) THUMB( lsl r4, r4, r3 ) THUMB( orr r12, r12, r4 ) @@ -79,9 +87,20 @@ delay_1: cpsid a @ disable imprecise aborts. ldr r3, [r1] @ read CSR str r3, [r1] @ clear CSR + tst r0, #TEGRA30_POWER_HOTPLUG_SHUTDOWN + beq flow_ctrl_setting_for_lp2 + + /* flow controller set up for hotplug */ + mov r3, #FLOW_CTRL_WAITEVENT @ For hotplug + b flow_ctrl_done +flow_ctrl_setting_for_lp2: + /* flow controller set up for LP2 */ + cmp r10, #TEGRA30 moveq r3, #FLOW_CTRL_WAIT_FOR_INTERRUPT @ For LP2 - movne r3, #FLOW_CTRL_WAITEVENT @ For hotplug + movne r3, #FLOW_CTRL_WAITEVENT +flow_ctrl_done: + cmp r10, #TEGRA30 str r3, [r2] ldr r0, [r2] b wfe_war @@ -89,7 +108,8 @@ delay_1: __cpu_reset_again: dsb .align 5 - wfe @ CPU should be power gated here + wfeeq @ CPU should be power gated here + wfine wfe_war: b __cpu_reset_again |