[PATCH V2] ARM: imx: suspend/resume: use outer_disable/resume

From: Peng Fan
Date: Tue Dec 26 2017 - 21:15:04 EST


Use outer_disable/resume for suspend/resume.
With the two APIs used, code could be simplified and easy to extend
to introduce l2c_write_sec for i.MX platforms when moving Linux Kernel
runs in non-secure world.

Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Sascha Hauer <kernel@xxxxxxxxxxxxxx>
Cc: Fabio Estevam <fabio.estevam@xxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Dong Aisheng <aisheng.dong@xxxxxxx>
---

V2:
Fix 6SX booting. The V1 patch does not take 6SX low power idle into
consideration.
Tested on 6Q-SDB and 6SX-SDB.

arch/arm/mach-imx/cpuidle-imx6sx.c | 2 ++
arch/arm/mach-imx/pm-imx6.c | 2 ++
arch/arm/mach-imx/suspend-imx6.S | 24 ------------------------
3 files changed, 4 insertions(+), 24 deletions(-)

diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c
index c5a5c3a70ab1..b35841d133dc 100644
--- a/arch/arm/mach-imx/cpuidle-imx6sx.c
+++ b/arch/arm/mach-imx/cpuidle-imx6sx.c
@@ -49,7 +49,9 @@ static int imx6sx_enter_wait(struct cpuidle_device *dev,
cpu_pm_enter();
cpu_cluster_pm_enter();

+ outer_disable();
cpu_suspend(0, imx6sx_idle_finish);
+ outer_resume();

cpu_cluster_pm_exit();
cpu_pm_exit();
diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c
index ecdf071653d4..153a0afc7645 100644
--- a/arch/arm/mach-imx/pm-imx6.c
+++ b/arch/arm/mach-imx/pm-imx6.c
@@ -392,8 +392,10 @@ static int imx6q_pm_enter(suspend_state_t state)
imx6_enable_rbc(true);
imx_gpc_pre_suspend(true);
imx_anatop_pre_suspend();
+ outer_disable();
/* Zzz ... */
cpu_suspend(0, imx6q_suspend_finish);
+ outer_resume();
if (cpu_is_imx6q() || cpu_is_imx6dl())
imx_smp_prepare();
imx_anatop_post_resume();
diff --git a/arch/arm/mach-imx/suspend-imx6.S b/arch/arm/mach-imx/suspend-imx6.S
index 76ee2ceec8d5..324f6b165e82 100644
--- a/arch/arm/mach-imx/suspend-imx6.S
+++ b/arch/arm/mach-imx/suspend-imx6.S
@@ -74,24 +74,6 @@

.align 3

- .macro sync_l2_cache
-
- /* sync L2 cache to drain L2's buffers to DRAM. */
-#ifdef CONFIG_CACHE_L2X0
- ldr r11, [r0, #PM_INFO_MX6Q_L2_V_OFFSET]
- teq r11, #0
- beq 6f
- mov r6, #0x0
- str r6, [r11, #L2X0_CACHE_SYNC]
-1:
- ldr r6, [r11, #L2X0_CACHE_SYNC]
- ands r6, r6, #0x1
- bne 1b
-6:
-#endif
-
- .endm
-
.macro resume_mmdc

/* restore MMDC IO */
@@ -185,9 +167,6 @@ ENTRY(imx6_suspend)
str r9, [r11, #MX6Q_SRC_GPR1]
str r1, [r11, #MX6Q_SRC_GPR2]

- /* need to sync L2 cache before DSM. */
- sync_l2_cache
-
ldr r11, [r0, #PM_INFO_MX6Q_MMDC_V_OFFSET]
/*
* put DDR explicitly into self-refresh and
@@ -342,8 +321,5 @@ ENDPROC(imx6_suspend)

ENTRY(v7_cpu_resume)
bl v7_invalidate_l1
-#ifdef CONFIG_CACHE_L2X0
- bl l2c310_early_resume
-#endif
b cpu_resume
ENDPROC(v7_cpu_resume)
--
2.14.1