[PATCH 4/4] ARM: imx: cpuidle-imx7ulp: Stop mode disallowed when HSRUN

peng.fan
2020-09-11T03:38:33Z

When cpu runs in HSRUN mode, cpuidle is not allowed to run into
Stop mode. So add imx7ulp_get_mode to get thr cpu run mode,
and use WAIT mode instead, when cpu in HSRUN mode.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
arch/arm/mach-imx/common.h | 1 +
arch/arm/mach-imx/cpuidle-imx7ulp.c | 14 +++++++++++---
arch/arm/mach-imx/pm-imx7ulp.c | 10 ++++++++++
3 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 72c3fcc32910..707ac650f1c2 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -103,6 +103,7 @@ void imx6_set_int_mem_clk_lpm(bool enable);
void imx6sl_set_wait_clk(bool enter);
int imx_mmdc_get_ddr_type(void);
int imx7ulp_set_lpm(enum ulp_cpu_pwr_mode mode);
+u32 imx7ulp_get_mode(void);

void imx_cpu_die(unsigned int cpu);
int imx_cpu_kill(unsigned int cpu);
diff --git a/arch/arm/mach-imx/cpuidle-imx7ulp.c b/arch/arm/mach-imx/cpuidle-imx7ulp.c
index ca86c967d19e..e7009d10b331 100644
--- a/arch/arm/mach-imx/cpuidle-imx7ulp.c
+++ b/arch/arm/mach-imx/cpuidle-imx7ulp.c
@@ -15,10 +15,18 @@
static int imx7ulp_enter_wait(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
- if (index == 1)
+ u32 mode;
+
+ if (index == 1) {
imx7ulp_set_lpm(ULP_PM_WAIT);
- else
- imx7ulp_set_lpm(ULP_PM_STOP);
+ } else {
+ mode = imx7ulp_get_mode();
+
+ if (mode == 3)
+ imx7ulp_set_lpm(ULP_PM_WAIT);
+ else
+ imx7ulp_set_lpm(ULP_PM_STOP);
+ }

cpu_do_idle();

diff --git a/arch/arm/mach-imx/pm-imx7ulp.c b/arch/arm/mach-imx/pm-imx7ulp.c
index 543ac69f5f70..eb1578f0bfa5 100644
--- a/arch/arm/mach-imx/pm-imx7ulp.c
+++ b/arch/arm/mach-imx/pm-imx7ulp.c
@@ -63,6 +63,16 @@ int imx7ulp_set_lpm(enum ulp_cpu_pwr_mode mode)
return 0;
}

+u32 imx7ulp_get_mode(void)
+{
+ u32 mode;
+
+ mode = readl_relaxed(smc1_base + SMC_PMCTRL) & BM_PMCTRL_RUNM;
+ mode >>= BP_PMCTRL_RUNM;
+
+ return mode;
+}
+
void __init imx7ulp_pm_init(void)
{
struct device_node *np;
--
2.28.0