Re: [PATCH][V2] powerpc/fsl-pci: Add PCI controller ATMU PM support
From: Timur Tabi <hidden>
Date: 2012-11-07 15:58:01
Jia Hongtao wrote:
quoted hunk ↗ jump to hunk
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 <redacted> Signed-off-by: Li Yang <redacted> --- 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