mmc: core: Collect common code for card ocr validation

Since mmc_select_voltage now only gets called from the attach sequence,
it makes sense to move the out of spec validations of the card ocr into
this function.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 63672aba0e98..bcb507771eeb 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1357,6 +1357,16 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
 {
         int bit;
 
+        /*
+         * Sanity check the voltages that the card claims to
+         * support.
+         */
+        if (ocr & 0x7F) {
+                dev_warn(mmc_dev(host),
+                "card claims to support voltages below defined range\n");
+                ocr &= ~0x7F;
+        }
+
         ocr &= host->ocr_avail;
         if (!ocr) {
                 dev_warn(mmc_dev(host), "no support for card's volts\n");