diff options
Diffstat (limited to 'drivers/pci/controller/pcie-rcar.c')
| -rw-r--r-- | drivers/pci/controller/pcie-rcar.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c index c8febb009454..6a4e435bd35f 100644 --- a/drivers/pci/controller/pcie-rcar.c +++ b/drivers/pci/controller/pcie-rcar.c @@ -46,6 +46,7 @@ /* Transfer control */ #define PCIETCTLR 0x02000 +#define DL_DOWN BIT(3) #define CFINIT 1 #define PCIETSTR 0x02004 #define DATA_LINK_ACTIVE 1 @@ -94,6 +95,7 @@ #define MACCTLR 0x011058 #define SPEED_CHANGE BIT(24) #define SCRAMBLE_DISABLE BIT(27) +#define PMSR 0x01105c #define MACS2R 0x011078 #define MACCGSPSETR 0x011084 #define SPCNGRSN BIT(31) @@ -1130,6 +1132,7 @@ static int rcar_pcie_probe(struct platform_device *pdev) pcie = pci_host_bridge_priv(bridge); pcie->dev = dev; + platform_set_drvdata(pdev, pcie); err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); if (err) @@ -1221,10 +1224,28 @@ err_free_bridge: return err; } +static int rcar_pcie_resume_noirq(struct device *dev) +{ + struct rcar_pcie *pcie = dev_get_drvdata(dev); + + if (rcar_pci_read_reg(pcie, PMSR) && + !(rcar_pci_read_reg(pcie, PCIETCTLR) & DL_DOWN)) + return 0; + + /* Re-establish the PCIe link */ + rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); + return rcar_pcie_wait_for_dl(pcie); +} + +static const struct dev_pm_ops rcar_pcie_pm_ops = { + .resume_noirq = rcar_pcie_resume_noirq, +}; + static struct platform_driver rcar_pcie_driver = { .driver = { .name = "rcar-pcie", .of_match_table = rcar_pcie_of_match, + .pm = &rcar_pcie_pm_ops, .suppress_bind_attrs = true, }, .probe = rcar_pcie_probe, |