From d12a9c6240167bab5a49180cf642cc9e6e518bca Mon Sep 17 00:00:00 2001
From: Robin Gong <yibin.gong@nxp.com>
Date: Fri, 6 Aug 2021 00:19:06 +0800
Subject: [PATCH] LF-4265: mailbox: imx: fix wakeup failure from freeze mode
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.
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
---
drivers/mailbox/imx-mailbox.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index e5ef3b92589403..a5683e12b36d86 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
+#include <linux/suspend.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
@@ -80,6 +81,7 @@ struct imx_mu_priv {
const struct imx_mu_dcfg *dcfg;
struct clk *clk;
int irq;
+ bool suspend;
u32 xcr[4];
@@ -510,6 +512,9 @@ static irqreturn_t imx_mu_isr(int irq, void *p)
return IRQ_NONE;
}
+ if (priv->suspend)
+ pm_system_wakeup();
+
return IRQ_HANDLED;
}
@@ -922,6 +927,8 @@ static int __maybe_unused imx_mu_suspend_noirq(struct device *dev)
priv->xcr[i] = imx_mu_read(priv, priv->dcfg->xCR[i]);
}
+ priv->suspend = true;
+
return 0;
}
@@ -943,6 +950,8 @@ static int __maybe_unused imx_mu_resume_noirq(struct device *dev)
imx_mu_write(priv, priv->xcr[i], priv->dcfg->xCR[i]);
}
+ priv->suspend = false;
+
return 0;
}
--
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