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@@ -340,6 +340,201 @@ static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
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blkcache_invalidate(block_dev->if_type, block_dev->devnum);
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return block_dev->block_erase(block_dev, start, blkcnt);
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}
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+
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+/**
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+ * struct blk_driver - Driver for block interface types
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+ *
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+ * This provides access to the block devices for each interface type. One
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+ * driver should be provided using U_BOOT_LEGACY_BLK() for each interface
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+ * type that is to be supported.
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+ *
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+ * @if_typename: Interface type name
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+ * @if_type: Interface type
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+ * @max_devs: Maximum number of devices supported
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+ * @desc: Pointer to list of devices for this interface type,
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+ * or NULL to use @get_dev() instead
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+ */
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+struct blk_driver {
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+ const char *if_typename;
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+ enum if_type if_type;
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+ int max_devs;
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+ struct blk_desc *desc;
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+ /**
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+ * get_dev() - get a pointer to a block device given its number
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+ *
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+ * Each interface allocates its own devices and typically
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+ * struct blk_desc is contained with the interface's data structure.
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+ * There is no global numbering for block devices. This method allows
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+ * the device for an interface type to be obtained when @desc is NULL.
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+ *
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+ * @devnum: Device number (0 for first device on that interface,
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+ * 1 for second, etc.
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+ * @descp: Returns pointer to the block device on success
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+ * @return 0 if OK, -ve on error
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+ */
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+ int (*get_dev)(int devnum, struct blk_desc **descp);
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+
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+ /**
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+ * select_hwpart() - Select a hardware partition
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+ *
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+ * Some devices (e.g. MMC) can support partitioning at the hardware
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+ * level. This is quite separate from the normal idea of
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+ * software-based partitions. MMC hardware partitions must be
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+ * explicitly selected. Once selected only the region of the device
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+ * covered by that partition is accessible.
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+ *
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+ * The MMC standard provides for two boot partitions (numbered 1 and 2),
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+ * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
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+ * Partition 0 is the main user-data partition.
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+ *
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+ * @desc: Block device descriptor
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+ * @hwpart: Hardware partition number to select. 0 means the main
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+ * user-data partition, 1 is the first partition, 2 is
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+ * the second, etc.
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+ * @return 0 if OK, other value for an error
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+ */
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+ int (*select_hwpart)(struct blk_desc *desc, int hwpart);
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+};
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+
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+/*
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+ * Declare a new U-Boot legacy block driver. New drivers should use driver
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+ * model (UCLASS_BLK).
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+ */
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+#define U_BOOT_LEGACY_BLK(__name) \
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+ ll_entry_declare(struct blk_driver, __name, blk_driver)
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+
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+struct blk_driver *blk_driver_lookup_type(int if_type);
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+
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#endif /* !CONFIG_BLK */
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+/**
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+ * blk_get_devnum_by_typename() - Get a block device by type and number
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+ *
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+ * This looks through the available block devices of the given type, returning
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+ * the one with the given @devnum.
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @return point to block device descriptor, or NULL if not found
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+ */
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+struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum);
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+
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+/**
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+ * blk_get_devnum_by_type() - Get a block device by type name, and number
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+ *
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+ * This looks up the block device type based on @if_typename, then calls
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+ * blk_get_devnum_by_type().
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+ *
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+ * @if_typename: Block device type name
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+ * @devnum: Device number
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+ * @return point to block device descriptor, or NULL if not found
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+ */
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+struct blk_desc *blk_get_devnum_by_typename(const char *if_typename,
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+ int devnum);
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+
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+/**
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+ * blk_dselect_hwpart() - select a hardware partition
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+ *
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+ * This selects a hardware partition (such as is supported by MMC). The block
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+ * device size may change as this effectively points the block device to a
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+ * partition at the hardware level. See the select_hwpart() method above.
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+ *
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+ * @desc: Block device descriptor for the device to select
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+ * @hwpart: Partition number to select
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+ * @return 0 if OK, -ve on error
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+ */
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+int blk_dselect_hwpart(struct blk_desc *desc, int hwpart);
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+
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+/**
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+ * blk_list_part() - list the partitions for block devices of a given type
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+ *
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+ * This looks up the partition type for each block device of type @if_type,
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+ * then displays a list of partitions.
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+ *
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+ * @if_type: Block device type
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+ * @return 0 if OK, -ENODEV if there is none of that type
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+ */
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+int blk_list_part(enum if_type if_type);
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+
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+/**
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+ * blk_list_devices() - list the block devices of a given type
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+ *
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+ * This lists each block device of the type @if_type, showing the capacity
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+ * as well as type-specific information.
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+ *
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+ * @if_type: Block device type
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+ */
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+void blk_list_devices(enum if_type if_type);
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+
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+/**
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+ * blk_show_device() - show information about a given block device
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+ *
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+ * This shows the block device capacity as well as type-specific information.
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @return 0 if OK, -ENODEV for invalid device number
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+ */
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+int blk_show_device(enum if_type if_type, int devnum);
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+
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+/**
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+ * blk_print_device_num() - show information about a given block device
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+ *
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+ * This is similar to blk_show_device() but returns an error if the block
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+ * device type is unknown.
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @return 0 if OK, -ENODEV for invalid device number, -ENOENT if the block
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+ * device is not connected
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+ */
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+int blk_print_device_num(enum if_type if_type, int devnum);
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+
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+/**
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+ * blk_print_part_devnum() - print the partition information for a device
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @return 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if
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+ * the interface type is not supported, other -ve on other error
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+ */
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+int blk_print_part_devnum(enum if_type if_type, int devnum);
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+
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+/**
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+ * blk_read_devnum() - read blocks from a device
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @blkcnt: Number of blocks to read
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+ * @buffer: Address to write data to
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+ * @return number of blocks read, or -ve error number on error
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+ */
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+ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
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+ lbaint_t blkcnt, void *buffer);
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+
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+/**
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+ * blk_write_devnum() - write blocks to a device
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @blkcnt: Number of blocks to write
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+ * @buffer: Address to read data from
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+ * @return number of blocks written, or -ve error number on error
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+ */
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+ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
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+ lbaint_t blkcnt, const void *buffer);
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+
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+/**
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+ * blk_select_hwpart_devnum() - select a hardware partition
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+ *
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+ * This is similar to blk_dselect_hwpart() but it looks up the interface and
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+ * device number.
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+ *
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+ * @if_type: Block device type
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+ * @devnum: Device number
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+ * @hwpart: Partition number to select
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+ * @return 0 if OK, -ve on error
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+ */
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+int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart);
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+
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#endif
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