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dm: Support driver model prior to relocation

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Initialise devices marked 'pre-reloc' and make them available prior to
relocation. Note that this requires pre-reloc malloc() to be available.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2014-07-23 06:55:04 -06:00
parent 00606d7e39
commit ab7cd62790
5 changed files with 60 additions and 22 deletions
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3
include/asm-generic/global_data.h
View File

@@ -65,7 +65,8 @@ typedef struct global_data {
struct global_data *new_gd; /* relocated global data */
#ifdef CONFIG_DM
struct udevice *dm_root;/* Root instance for Driver Model */
struct udevice *dm_root; /* Root instance for Driver Model */
struct udevice *dm_root_f; /* Pre-relocation root instance */
struct list_head uclass_root; /* Head of core tree */
#endif

13
include/dm/root.h
View File

@@ -44,6 +44,19 @@ int dm_scan_platdata(bool pre_reloc_only);
*/
int dm_scan_fdt(const void *blob, bool pre_reloc_only);
/**
* dm_init_and_scan() - Initialise Driver Model structures and scan for devices
*
* This function initialises the roots of the driver tree and uclass trees,
* then scans and binds available devices from platform data and the FDT.
* This calls dm_init() to set up Driver Model structures.
*
* @pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
* flag. If false bind all drivers.
* @return 0 if OK, -ve on error
*/
int dm_init_and_scan(bool pre_reloc_only);
/**
* dm_init() - Initialise Driver Model structures
*