mmc: core: Add in support to expose PRV for v4 MMCs
The JEDEC MMC v4 spec defines a new PRV value in place of the original
fwrev and hwrev specified in v1. We can expose this in the kernel to enable
user space to more easily determine the product revision of a given MMC.
Signed-off-by: Bernie Thompson <[email protected]>
Reviewed-by: Ulf Hansson <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
index 0d98fac..189bab0 100644
--- a/Documentation/mmc/mmc-dev-attrs.txt
+++ b/Documentation/mmc/mmc-dev-attrs.txt
@@ -22,6 +22,7 @@
manfid Manufacturer ID (from CID Register)
name Product Name (from CID Register)
oemid OEM/Application ID (from CID Register)
+ prv Product Revision (from CID Register) (SD and MMCv4 only)
serial Product Serial Number (from CID Register)
erase_size Erase group size
preferred_erase_size Preferred erase size
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index c8f3d6e..d584f7c 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -96,6 +96,7 @@
card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
+ card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
card->cid.month = UNSTUFF_BITS(resp, 12, 4);
card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
@@ -627,6 +628,7 @@
MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
+MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
card->ext_csd.enhanced_area_offset);
@@ -645,6 +647,7 @@
&dev_attr_manfid.attr,
&dev_attr_name.attr,
&dev_attr_oemid.attr,
+ &dev_attr_prv.attr,
&dev_attr_serial.attr,
&dev_attr_enhanced_area_offset.attr,
&dev_attr_enhanced_area_size.attr,
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 61b2c30..f31725b 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -17,6 +17,7 @@
struct mmc_cid {
unsigned int manfid;
char prod_name[8];
+ unsigned char prv;
unsigned int serial;
unsigned short oemid;
unsigned short year;
