There was no way for user to know what UHS-I modes the SD card
supporting. We might not know, even the highest speed mode
failed to use and fell back to a lower speed mode.
This patch is to export sd3_bus_mode to user space to check.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx>
---
drivers/mmc/core/sd.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 6f054c4..13409c2 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -689,6 +689,7 @@ MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
+MMC_DEV_ATTR(sd3_bus_mode, "0x%08x\n", card->sw_caps.sd3_bus_mode);
static ssize_t mmc_dsr_show(struct device *dev,
@@ -753,6 +754,7 @@ static struct attribute *sd_std_attrs[] = {
&dev_attr_ocr.attr,
&dev_attr_rca.attr,
&dev_attr_dsr.attr,
+ &dev_attr_sd3_bus_mode.attr,
NULL,
};
--
2.7.4
