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authorSimon Glass <sjg@chromium.org>2016-05-01 13:52:30 -0600
committerSimon Glass <sjg@chromium.org>2016-05-17 09:54:43 -0600
commitcd0fb55b640b2991c1d29122d252a360037ed903 (patch)
tree65333e1eec999d760682765b6913d9ec0d94abb5 /include
parent69f45cd53b8ad8bc3afef2cf2410baf58fe75a6f (diff)
downloadtalos-obmc-uboot-cd0fb55b640b2991c1d29122d252a360037ed903.tar.gz
talos-obmc-uboot-cd0fb55b640b2991c1d29122d252a360037ed903.zip
dm: blk: Add functions to select a hardware partition
The block device uclass does not currently support selecting a particular hardware partition but this is needed for MMC. Add it so that the blk API can support MMC properly. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
-rw-r--r--include/blk.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/include/blk.h b/include/blk.h
index 82b2c1a706..3fa373e208 100644
--- a/include/blk.h
+++ b/include/blk.h
@@ -211,6 +211,25 @@ struct blk_ops {
*/
unsigned long (*erase)(struct udevice *dev, lbaint_t start,
lbaint_t blkcnt);
+
+ /**
+ * select_hwpart() - select a particular hardware partition
+ *
+ * Some devices (e.g. MMC) can support partitioning at the hardware
+ * level. This is quite separate from the normal idea of
+ * software-based partitions. MMC hardware partitions must be
+ * explicitly selected. Once selected only the region of the device
+ * covered by that partition is accessible.
+ *
+ * The MMC standard provides for two boot partitions (numbered 1 and 2),
+ * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
+ *
+ * @desc: Block device to update
+ * @hwpart: Hardware partition number to select. 0 means the raw
+ * device, 1 is the first partition, 2 is the second, etc.
+ * @return 0 if OK, -ve on error
+ */
+ int (*select_hwpart)(struct udevice *dev, int hwpart);
};
#define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops)
@@ -329,6 +348,17 @@ int blk_unbind_all(int if_type);
*/
int blk_find_max_devnum(enum if_type if_type);
+/**
+ * blk_select_hwpart() - select a hardware partition
+ *
+ * Select a hardware partition if the device supports it (typically MMC does)
+ *
+ * @dev: Device to update
+ * @hwpart: Partition number to select
+ * @return 0 if OK, -ve on error
+ */
+int blk_select_hwpart(struct udevice *dev, int hwpart);
+
#else
#include <errno.h>
/*
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