Add MSI interrupt support if the SD host device can support MSI interrupt. Changes: Enable MSI interrupt if the MSI capability bit is set in capability register.
Signed-off-by: ernest.zhang <[email protected]> --- drivers/mmc/host/sdhci-pci-o2micro.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c index a918984..7d04f4b 100644 --- a/drivers/mmc/host/sdhci-pci-o2micro.c +++ b/drivers/mmc/host/sdhci-pci-o2micro.c @@ -391,6 +391,23 @@ int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot) if (reg & 0x1) host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; +#if defined(CONFIG_PCI_MSI) + if (pci_find_capability(chip->pdev, PCI_CAP_ID_MSI)) { + ret = pci_enable_msi(chip->pdev); + if (!ret) { + host->irq = chip->pdev->irq; + pr_info("%s: use MSI irq, irq=%d\n", + mmc_hostname(host->mmc), host->irq); + } else { + pr_err("%s: enable PCI MSI failed, err=%d\n", + mmc_hostname(host->mmc), ret); + } + } else { + pr_info("%s: unsupport msi, use INTx irq\n", + mmc_hostname(host->mmc)); + } +#endif + if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) { ret = pci_read_config_dword(chip->pdev, O2_SD_MISC_SETTING, ®); -- 2.7.4
