Messages in this thread | | | Subject | Re: [PATCH V4 3/3] mmc: sdhci: Add MSI interrupt support for O2 SD host | From | Adrian Hunter <> | Date | Thu, 29 Mar 2018 15:44:50 +0300 |
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On 09/03/18 16:04, ernest.zhang wrote: > 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 <ernest.zhang@bayhubtech.com> > --- > 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)
Do you really need to check 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, ®); >
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