diff options
Diffstat (limited to 'drivers/mmc/core/host.c')
-rw-r--r-- | drivers/mmc/core/host.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index d739e2b631fe..2ed2b4d5e5a5 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -590,11 +590,20 @@ EXPORT_SYMBOL(mmc_alloc_host); static int mmc_validate_host_caps(struct mmc_host *host) { - if (host->caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) { - dev_warn(host->parent, "missing ->enable_sdio_irq() ops\n"); + struct device *dev = host->parent; + u32 caps = host->caps, caps2 = host->caps2; + + if (caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) { + dev_warn(dev, "missing ->enable_sdio_irq() ops\n"); return -EINVAL; } + if (caps2 & (MMC_CAP2_HS400_ES | MMC_CAP2_HS400) && + !(caps & MMC_CAP_8_BIT_DATA)) { + dev_warn(dev, "drop HS400 support since no 8-bit bus\n"); + host->caps2 = caps2 & ~MMC_CAP2_HS400_ES & ~MMC_CAP2_HS400; + } + return 0; } |