diff options
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/omap-mailbox.c | 45 |
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), }, }; |