The MMC version is read from the reserved bits 125:122 in the CSD register,
theses bits are specified as SPEC_VERS by JEDEC in the eMMC standard JESD84.
Signed-off-by: Jules Maselbas <jmaselbas@xxxxxxxx>
---
drivers/mci/mci-core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index de1efe3bb9..5a8f81ecb8 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -936,15 +936,15 @@ static void mci_set_bus_width(struct mci *mci, enum mci_bus_width width)
/**
* Extract card's version from its CSD
* @param mci MCI instance
- * @return 0 on success
*/
static void mci_detect_version_from_csd(struct mci *mci)
{
int version;
if (mci->version == MMC_VERSION_UNKNOWN) {
- /* the version is coded in the bits 127:126 (left aligned) */
- version = (mci->csd[0] >> 26) & 0xf; /* FIXME why other width? */
+ /* this should only apply to MMC card, JESD84-B51 defines
+ * bits 125:122 as SPEC_VER (reserved bits in CSD) */
+ version = (mci->csd[0] >> 26) & 0xf;
switch (version) {
case 0:
--
2.45.0
