diff options
Diffstat (limited to 'drivers/mmc/core/sd.c')
| -rw-r--r-- | drivers/mmc/core/sd.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 6c6beb48f3a..fb18b301502 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -297,6 +297,24 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr) mmc_attach_bus(host, &mmc_sd_ops); + /* + * Sanity check the voltages that the card claims to + * support. + */ + if (ocr & 0x7F) { + printk(KERN_WARNING "%s: card claims to support voltages " + "below the defined range. These will be ignored.\n", + mmc_hostname(host)); + ocr &= ~0x7F; + } + + if (ocr & MMC_VDD_165_195) { + printk(KERN_WARNING "%s: SD card claims to support the " + "incompletely defined 'low voltage range'. This " + "will be ignored.\n", mmc_hostname(host)); + ocr &= ~MMC_VDD_165_195; + } + host->ocr = mmc_select_voltage(host, ocr); /* |