Messages in this thread Patch in this message | | | From | Chew Chiau Ee <> | Subject | [PATCH] dma: dw: Add suspend and resume handling for PCI mode DW_DMAC. | Date | Tue, 10 Dec 2013 22:06:13 +0800 |
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From: Chew, Chiau Ee <chiau.ee.chew@intel.com>
This is to disable/enable DW_DMAC hw during suspend/resume.
Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/dma/dw/pci.c | 33 +++++++++++++++++++++++++++++++++ 1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c index e89fc24..97bc3a2 100644 --- a/drivers/dma/dw/pci.c +++ b/drivers/dma/dw/pci.c @@ -75,6 +75,36 @@ static void dw_pci_remove(struct pci_dev *pdev) dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); } +#ifdef CONFIG_PM_SLEEP + +static int dw_pci_suspend_noirq(struct device *dev) +{ + struct pci_dev *pci = to_pci_dev(dev); + struct dw_dma_chip *chip = pci_get_drvdata(pci); + + return dw_dma_suspend(chip); +}; + +static int dw_pci_resume_noirq(struct device *dev) +{ + struct pci_dev *pci = to_pci_dev(dev); + struct dw_dma_chip *chip = pci_get_drvdata(pci); + + return dw_dma_resume(chip); +}; + +#else /* !CONFIG_PM_SLEEP */ + +#define dw_pci_suspend_noirq NULL +#define dw_pci_resume_noirq NULL + +#endif /* !CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops dw_pci_dev_pm_ops = { + .suspend_noirq = dw_pci_suspend_noirq, + .resume_noirq = dw_pci_resume_noirq, +}; + static DEFINE_PCI_DEVICE_TABLE(dw_pci_id_table) = { /* Medfield */ { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, @@ -92,6 +122,9 @@ static struct pci_driver dw_pci_driver = { .id_table = dw_pci_id_table, .probe = dw_pci_probe, .remove = dw_pci_remove, + .driver = { + .pm = &dw_pci_dev_pm_ops, + }, }; module_pci_driver(dw_pci_driver); -- 1.7.4.4
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