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path: root/drivers/mailbox/imx-mailbox.c
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Diffstat (limited to 'drivers/mailbox/imx-mailbox.c')
-rw-r--r--drivers/mailbox/imx-mailbox.c27
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 7906624a731c..97bf0acf51d8 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -12,6 +12,7 @@
#include <linux/mailbox_controller.h>
#include <linux/module.h>
#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
#include <linux/slab.h>
#define IMX_MU_xSR_GIPn(x) BIT(28 + (3 - (x)))
@@ -287,6 +288,7 @@ static int imx_mu_startup(struct mbox_chan *chan)
struct imx_mu_con_priv *cp = chan->con_priv;
int ret;
+ pm_runtime_get_sync(priv->dev);
if (cp->type == IMX_MU_TYPE_TXDB) {
/* Tx doorbell don't have ACK support */
tasklet_init(&cp->txdb_tasklet, imx_mu_txdb_tasklet,
@@ -323,6 +325,7 @@ static void imx_mu_shutdown(struct mbox_chan *chan)
if (cp->type == IMX_MU_TYPE_TXDB) {
tasklet_kill(&cp->txdb_tasklet);
+ pm_runtime_put_sync(priv->dev);
return;
}
@@ -341,6 +344,7 @@ static void imx_mu_shutdown(struct mbox_chan *chan)
}
free_irq(priv->irq, chan);
+ pm_runtime_put_sync(priv->dev);
}
static const struct mbox_chan_ops imx_mu_ops = {
@@ -508,7 +512,27 @@ static int imx_mu_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, priv);
- return devm_mbox_controller_register(dev, &priv->mbox);
+ ret = devm_mbox_controller_register(dev, &priv->mbox);
+ if (ret)
+ return ret;
+
+ pm_runtime_enable(dev);
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(dev);
+ goto disable_runtime_pm;
+ }
+
+ ret = pm_runtime_put_sync(dev);
+ if (ret < 0)
+ goto disable_runtime_pm;
+
+ return 0;
+
+disable_runtime_pm:
+ pm_runtime_disable(dev);
+ return ret;
}
static int imx_mu_remove(struct platform_device *pdev)
@@ -516,6 +540,7 @@ static int imx_mu_remove(struct platform_device *pdev)
struct imx_mu_priv *priv = platform_get_drvdata(pdev);
clk_disable_unprepare(priv->clk);
+ pm_runtime_disable(priv->dev);
return 0;
}