From: Robin Gong <yibin.gong@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Peng Fan <peng.fan@xxxxxxx>
Signed-off-by: Robin Gong <yibin.gong@xxxxxxx>
Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
---
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 ffe36a6bef9e..b3a2772f0aa1 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>
#define IMX_MU_CHANS 16
@@ -76,6 +77,7 @@ struct imx_mu_priv {
const struct imx_mu_dcfg *dcfg;
struct clk *clk;
int irq;
+ bool suspend;
u32 xcr[4];
@@ -334,6 +336,9 @@ static irqreturn_t imx_mu_isr(int irq, void *p)
return IRQ_NONE;
}
+ if (priv->suspend)
+ pm_system_wakeup();
+
return IRQ_HANDLED;
}
@@ -702,6 +707,8 @@ 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;
}
@@ -723,6 +730,8 @@ 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;
}
--
2.25.1
