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dm: core: Create a struct for device runtime info

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At present when driver model needs to change a device it simply updates
the struct udevice structure. But with of-platdata-inst most of the fields
are not modified at runtime. In fact, typically only the flags need to
change.

For systems running SPL from read-only memory it is convenient to separate
out the runtime information, so that the devices don't need to be copied
before being used.

Create a new udevice_rt table, similar to the existing driver_rt. For now
it just holds the flags, although they are not used in this patch.

Add a new Kconfig for the driver_rt data, since this is not needed when
of-platdata-inst is used.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2021-03-15 17:25:36 +13:00
parent 95a5825f31
commit ab933d8026
5 changed files with 63 additions and 4 deletions
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16
include/asm-generic/global_data.h
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@@ -215,10 +215,14 @@ struct global_data {
* @uclass_root_s.
*/
struct list_head *uclass_root;
# if CONFIG_IS_ENABLED(OF_PLATDATA)
# if CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT)
/** @dm_driver_rt: Dynamic info about the driver */
struct driver_rt *dm_driver_rt;
# endif
#if CONFIG_IS_ENABLED(OF_PLATDATA_RT)
/** @dm_udevice_rt: Dynamic info about the udevice */
struct udevice_rt *dm_udevice_rt;
# endif
#endif
#ifdef CONFIG_TIMER
/**
@@ -483,7 +487,7 @@ struct global_data {
#define gd_set_of_root(_root)
#endif
#if CONFIG_IS_ENABLED(OF_PLATDATA)
#if CONFIG_IS_ENABLED(OF_PLATDATA_DRIVER_RT)
#define gd_set_dm_driver_rt(dyn) gd->dm_driver_rt = dyn
#define gd_dm_driver_rt() gd->dm_driver_rt
#else
@@ -491,6 +495,14 @@ struct global_data {
#define gd_dm_driver_rt() NULL
#endif
#if CONFIG_IS_ENABLED(OF_PLATDATA_RT)
#define gd_set_dm_udevice_rt(dyn) gd->dm_udevice_rt = dyn
#define gd_dm_udevice_rt() gd->dm_udevice_rt
#else
#define gd_set_dm_udevice_rt(dyn)
#define gd_dm_udevice_rt() NULL
#endif
#ifdef CONFIG_GENERATE_ACPI_TABLE
#define gd_acpi_ctx() gd->acpi_ctx
#else