linux-kernel - [PATCH V4 4/4] ARM: imx: cpuidle-imx7ulp: Stop mode disallowed when HSRUN

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Message-Id: <1586954449-17463-5-git-send-email-peng.fan@nxp.com>
Date:   Wed, 15 Apr 2020 20:40:49 +0800
From:   peng.fan@....com
To:     shawnguo@...nel.org, s.hauer@...gutronix.de, sboyd@...nel.org,
        robh+dt@...nel.org
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        Anson.Huang@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, abel.vesa@....com,
        Peng Fan <peng.fan@....com>
Subject: [PATCH V4 4/4] ARM: imx: cpuidle-imx7ulp: Stop mode disallowed when HSRUN

From: Peng Fan <peng.fan@....com>

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@....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 5aa5796cff0e..db542da4fe67 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -104,6 +104,7 @@ 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 393faf1e8382..1410ccfc71bd 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;
-- 
2.16.4