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Subject[PATCH 5.10 557/599] mailbox: imx: fix wakeup failure from freeze mode
Date
From: Robin Gong <yibin.gong@nxp.com>

commit 892cb524ae8a27bf5e42f711318371acd9a9f74a upstream.

Since IRQF_NO_SUSPEND used for imx mailbox driver, that means this irq
can't be used for wakeup source so that can't wakeup from freeze mode.
Add pm_system_wakeup() to wakeup from freeze mode.

Fixes: b7b2796b9b31e("mailbox: imx: ONLY IPC MU needs IRQF_NO_SUSPEND flag")
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mailbox/imx-mailbox.c | 9 +++++++++
1 file changed, 9 insertions(+)

--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
+#include <linux/suspend.h>
#include <linux/slab.h>

#define IMX_MU_xSR_GIPn(x) BIT(28 + (3 - (x)))
@@ -66,6 +67,7 @@ struct imx_mu_priv {
const struct imx_mu_dcfg *dcfg;
struct clk *clk;
int irq;
+ bool suspend;

u32 xcr;

@@ -277,6 +279,9 @@ static irqreturn_t imx_mu_isr(int irq, v
return IRQ_NONE;
}

+ if (priv->suspend)
+ pm_system_wakeup();
+
return IRQ_HANDLED;
}

@@ -326,6 +331,8 @@ static int imx_mu_startup(struct mbox_ch
break;
}

+ priv->suspend = true;
+
return 0;
}

@@ -543,6 +550,8 @@ static int imx_mu_probe(struct platform_

clk_disable_unprepare(priv->clk);

+ priv->suspend = false;
+
return 0;

disable_runtime_pm:

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