Jia Hongtao wrote:
> 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 <b38...@freescale.com>
> Signed-off-by: Li Yang <le...@freescale.com>
> ---
> arch/powerpc/sysdev/fsl_pci.c | 37 +++++++++++++++++++++++++++++++++++--
> 1 files changed, 35 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
> index ffb93ae..e6ab952 100644
> --- a/arch/powerpc/sysdev/fsl_pci.c
> +++ b/arch/powerpc/sysdev/fsl_pci.c
> @@ -89,7 +89,7 @@ static int fsl_pci_dma_set_mask(struct device *dev, u64
> dma_mask)
> 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,
> 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 */
> -static void __init setup_pci_atmu(struct pci_controller *hose,
> +static void setup_pci_atmu(struct pci_controller *hose,
> struct resource *rsrc)
> {
> struct ccsr_pci __iomem *pci;
> @@ -902,9 +902,42 @@ static int __devinit fsl_pci_probe(struct
> platform_device *pdev)
> 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)) {
> + pr_warning("Get pci register base failed");
> + return -ENOMEM;
dev_err
and it's not -ENOMEM. ENOMEM means that you've run out of memory. This
should also be 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 = {
> .driver = {
> .name = "fsl-pci",
> + .pm = PCI_PM_OPS,
> .of_match_table = pci_ids,
> },
> .probe = fsl_pci_probe,
>
--
Timur Tabi
Linux kernel developer at Freescale
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