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.

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>

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 544de2db645313daced083bcc928aac217b5085b..8b1399e5d7bf7cbe2d3e7aefb5108c0bc688cd6b 100644 (file)
--- 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;
 }