From: "Chew, Chiau Ee" <chiau.ee.c...@intel.com>
This will add PCI mode suspend and resume callbacks
to support system suspend to and resume from S3.
Signed-off-by: Chew, Chiau Ee <chiau.ee.c...@intel.com>
Signed-off-by: Maurice Petallo <mauricex.r.peta...@intel.com>
---
drivers/dma/dw/pci.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c
index e89fc24..a47cac0 100644
--- a/drivers/dma/dw/pci.c
+++ b/drivers/dma/dw/pci.c
@@ -75,6 +75,39 @@ static void dw_pci_remove(struct pci_dev *pdev)
dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
}
+static int dw_dmac_pci_resume(struct device *dev)
+{
+ struct pci_dev *pci = to_pci_dev(dev);
+ struct dw_dma_chip *chip = pci_get_drvdata(pci);
+ int ret;
+
+ pci_set_power_state(pci, PCI_D0);
+ pci_restore_state(pci);
+ ret = pci_enable_device(pci);
+ if (ret)
+ return ret;
+ return dw_dma_resume(chip);
+};
+
+static int dw_dmac_pci_suspend(struct device *dev)
+{
+ struct pci_dev *pci = to_pci_dev(dev);
+ struct dw_dma_chip *chip = pci_get_drvdata(pci);
+ int ret;
+ ret = dw_dma_suspend(chip);
+ if (ret)
+ return ret;
+ pci_save_state(pci);
+ pci_disable_device(pci);
+ pci_set_power_state(pci, PCI_D3hot);
+ return 0;
+};
+
+static const struct dev_pm_ops dw_dma_pm_ops = {
+ .resume_noirq = dw_dmac_pci_resume,
+ .suspend_noirq = dw_dmac_pci_suspend,
+};
+
static DEFINE_PCI_DEVICE_TABLE(dw_pci_id_table) = {
/* Medfield */
{ PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata },
@@ -92,6 +125,9 @@ static struct pci_driver dw_pci_driver = {
.id_table = dw_pci_id_table,
.probe = dw_pci_probe,
.remove = dw_pci_remove,
+ .driver = {
+ .pm = &dw_dma_pm_ops,
+ },
};
module_pci_driver(dw_pci_driver);
--
1.7.10.4
--
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