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path: root/drivers/mailbox
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Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/omap-mailbox.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index d837def4c390..e402aa23226d 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -88,6 +88,7 @@ struct omap_mbox_device {
struct device *dev;
struct mutex cfg_lock;
void __iomem *mbox_base;
+ u32 *irq_ctx;
u32 num_users;
u32 num_fifos;
u32 intr_type;
@@ -650,6 +651,44 @@ static const struct mbox_chan_ops omap_mbox_chan_ops = {
.shutdown = omap_mbox_chan_shutdown,
};
+#ifdef CONFIG_PM_SLEEP
+static int omap_mbox_suspend(struct device *dev)
+{
+ struct omap_mbox_device *mdev = dev_get_drvdata(dev);
+ u32 usr, reg;
+
+ if (pm_runtime_status_suspended(dev))
+ return 0;
+
+ for (usr = 0; usr < mdev->num_users; usr++) {
+ reg = MAILBOX_IRQENABLE(mdev->intr_type, usr);
+ mdev->irq_ctx[usr] = mbox_read_reg(mdev, reg);
+ }
+
+ return 0;
+}
+
+static int omap_mbox_resume(struct device *dev)
+{
+ struct omap_mbox_device *mdev = dev_get_drvdata(dev);
+ u32 usr, reg;
+
+ if (pm_runtime_status_suspended(dev))
+ return 0;
+
+ for (usr = 0; usr < mdev->num_users; usr++) {
+ reg = MAILBOX_IRQENABLE(mdev->intr_type, usr);
+ mbox_write_reg(mdev, mdev->irq_ctx[usr], reg);
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops omap_mbox_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(omap_mbox_suspend, omap_mbox_resume)
+};
+
static const struct of_device_id omap_mailbox_of_match[] = {
{
.compatible = "ti,omap2-mailbox",
@@ -777,6 +816,11 @@ static int omap_mbox_probe(struct platform_device *pdev)
if (IS_ERR(mdev->mbox_base))
return PTR_ERR(mdev->mbox_base);
+ mdev->irq_ctx = devm_kzalloc(&pdev->dev, num_users * sizeof(u32),
+ GFP_KERNEL);
+ if (!mdev->irq_ctx)
+ return -ENOMEM;
+
/* allocate one extra for marking end of list */
list = devm_kzalloc(&pdev->dev, (info_count + 1) * sizeof(*list),
GFP_KERNEL);
@@ -887,6 +931,7 @@ static struct platform_driver omap_mbox_driver = {
.remove = omap_mbox_remove,
.driver = {
.name = "omap-mailbox",
+ .pm = &omap_mbox_pm_ops,
.of_match_table = of_match_ptr(omap_mailbox_of_match),
},
};