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powerpc/fsl-pci: Add PCI controller ATMU PM support

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Power supply for PCI controller ATMU registers is off when system go to
deep-sleep state. So ATMU registers should be re-setup during PCI
controllers resume from sleep.

Signed-off-by: Jia Hongtao <B38951@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Jia Hongtao 2012-11-08 10:11:07 +08:00 committed by Kumar Gala
parent b567d1c74e
commit a393d8977a
1 changed files with 35 additions and 2 deletions
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37
arch/powerpc/sysdev/fsl_pci.c
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@ -89,7 +89,7 @@ static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
return 0; return 0;
} }
static int __init setup_one_atmu(struct ccsr_pci __iomem *pci, static int setup_one_atmu(struct ccsr_pci __iomem *pci,
unsigned int index, const struct resource *res, unsigned int index, const struct resource *res,
resource_size_t offset) resource_size_t offset)
{ {
@ -126,7 +126,7 @@ static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
} }
/* atmu setup for fsl pci/pcie controller */ /* atmu setup for fsl pci/pcie controller */
static void __init setup_pci_atmu(struct pci_controller *hose, static void setup_pci_atmu(struct pci_controller *hose,
struct resource *rsrc) struct resource *rsrc)
{ {
struct ccsr_pci __iomem *pci; struct ccsr_pci __iomem *pci;
@ -902,9 +902,42 @@ static int __devinit fsl_pci_probe(struct platform_device *pdev)
return 0; return 0;
} }
#ifdef CONFIG_PM
static int fsl_pci_resume(struct device *dev)
{
struct pci_controller *hose;
struct resource pci_rsrc;
hose = pci_find_hose_for_OF_device(dev->of_node);
if (!hose)
return -ENODEV;
if (of_address_to_resource(dev->of_node, 0, &pci_rsrc)) {
dev_err(dev, "Get pci register base failed.");
return -ENODEV;
}
setup_pci_atmu(hose, &pci_rsrc);
return 0;
}
static const struct dev_pm_ops pci_pm_ops = {
.resume = fsl_pci_resume,
};
#define PCI_PM_OPS (&pci_pm_ops)
#else
#define PCI_PM_OPS NULL
#endif
static struct platform_driver fsl_pci_driver = { static struct platform_driver fsl_pci_driver = {
.driver = { .driver = {
.name = "fsl-pci", .name = "fsl-pci",
.pm = PCI_PM_OPS,
.of_match_table = pci_ids, .of_match_table = pci_ids,
}, },
.probe = fsl_pci_probe, .probe = fsl_pci_probe,