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lib: utils/fdt: Allow dynamic registration of FDT fixup callbacks

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It should possible to fixup FDT from any part of OpenSBI so add
fdt_register_general_fixup() which allows dynamic registration of
FDT fixup callbacks.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
This commit is contained in:
Anup Patel
2024-08-06 10:40:46 +05:30
committed by Anup Patel
parent fdd7263536
commit 9d760b810e
2 changed files with 48 additions and 0 deletions
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15
include/sbi_utils/fdt/fdt_fixup.h
View File

@@ -9,6 +9,8 @@
#ifndef __FDT_FIXUP_H__
#define __FDT_FIXUP_H__
#include <sbi/sbi_list.h>
struct sbi_cpu_idle_state {
const char *name;
uint32_t suspend_param;
@@ -93,6 +95,19 @@ void fdt_plic_fixup(void *fdt);
*/
int fdt_reserved_memory_fixup(void *fdt);
/** Representation of a general fixup */
struct fdt_general_fixup {
struct sbi_dlist head;
const char *name;
void (*do_fixup)(struct fdt_general_fixup *f, void *fdt);
};
/** Register a general fixup */
int fdt_register_general_fixup(struct fdt_general_fixup *fixup);
/** UnRegister a general fixup */
void fdt_unregister_general_fixup(struct fdt_general_fixup *fixup);
/**
* General device tree fix-up
*

33
lib/utils/fdt/fdt_fixup.c
View File

@@ -401,8 +401,38 @@ void fdt_config_fixup(void *fdt)
fdt_nop_node(fdt, config_offset);
}
static SBI_LIST_HEAD(fixup_list);
int fdt_register_general_fixup(struct fdt_general_fixup *fixup)
{
struct fdt_general_fixup *f;
if (!fixup || !fixup->name || !fixup->do_fixup)
return SBI_EINVAL;
sbi_list_for_each_entry(f, &fixup_list, head) {
if (f == fixup)
return SBI_EALREADY;
}
SBI_INIT_LIST_HEAD(&fixup->head);
sbi_list_add_tail(&fixup->head, &fixup_list);
return 0;
}
void fdt_unregister_general_fixup(struct fdt_general_fixup *fixup)
{
if (!fixup)
return;
sbi_list_del(&fixup->head);
}
void fdt_fixups(void *fdt)
{
struct fdt_general_fixup *f;
fdt_aplic_fixup(fdt);
fdt_imsic_fixup(fdt);
@@ -416,4 +446,7 @@ void fdt_fixups(void *fdt)
#endif
fdt_config_fixup(fdt);
sbi_list_for_each_entry(f, &fixup_list, head)
f->do_fixup(f, fdt);
}