diff options
| author | ernest.zhang <ernest.zhang@bayhubtech.com> | 2018-07-16 14:26:55 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-07-30 14:25:06 +0200 |
| commit | 02a3c0bd607402e4b7a5026f5a498291e8ade6f8 (patch) | |
| tree | cb2f7dfdd3d8f67d162bd69b98250556e4025a48 /drivers/mmc | |
| parent | 0086fc217d5d7ac2939c500733d1d046b9ac5012 (diff) | |
| download | linux-02a3c0bd607402e4b7a5026f5a498291e8ade6f8.tar.bz2 | |
mmc: sdhci: Add MSI interrupt support for O2 SD host
Add MSI interrupt support if the SD host device can support MSI interrupt.
Signed-off-by: ernest.zhang <ernest.zhang@bayhubtech.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-pci-o2micro.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c index 98e26ee1a972..77e9bc4aaee9 100644 --- a/drivers/mmc/host/sdhci-pci-o2micro.c +++ b/drivers/mmc/host/sdhci-pci-o2micro.c @@ -260,6 +260,29 @@ static void sdhci_pci_o2_fujin2_pci_init(struct sdhci_pci_chip *chip) pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL4, scratch_32); } +static void sdhci_pci_o2_enable_msi(struct sdhci_pci_chip *chip, + struct sdhci_host *host) +{ + int ret; + + ret = pci_find_capability(chip->pdev, PCI_CAP_ID_MSI); + if (!ret) { + pr_info("%s: unsupport msi, use INTx irq\n", + mmc_hostname(host->mmc)); + return; + } + + ret = pci_alloc_irq_vectors(chip->pdev, 1, 1, + PCI_IRQ_MSI | PCI_IRQ_MSIX); + if (ret < 0) { + pr_err("%s: enable PCI MSI failed, err=%d\n", + mmc_hostname(host->mmc), ret); + return; + } + + host->irq = pci_irq_vector(chip->pdev, 0); +} + int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot) { struct sdhci_pci_chip *chip; @@ -279,6 +302,8 @@ int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot) if (reg & 0x1) host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; + sdhci_pci_o2_enable_msi(chip, host); + if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) { ret = pci_read_config_dword(chip->pdev, O2_SD_MISC_SETTING, ®); |