[U-Boot] [PATCH 1/3] nand: allow demand initialization
Mike Frysinger
vapier at gentoo.org
Sun Oct 10 12:37:40 CEST 2010
Many people like the current nand_init() behavior where it is always
initialized during boot and the flash size shown, but there are cases
where we are willing to forgo this niceness for speed/functionality.
So allow nand_init() to be called multiple times, and push this call
down to the major NAND entry points rather than requiring the arch
board files to call it all the time.
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
common/cmd_nand.c | 2 ++
common/env_nand.c | 8 ++++++++
drivers/mtd/nand/nand.c | 7 +++++++
3 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 3f1d077..e0be7e5 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -309,6 +309,8 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
if (argc < 2)
goto usage;
+ nand_init();
+
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
diff --git a/common/env_nand.c b/common/env_nand.c
index 4e8307a..3dffebd 100644
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -359,6 +359,8 @@ void env_relocate_spec(void)
return;
}
+ nand_init();
+
if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
puts("No Valid Environment Area found\n");
@@ -404,6 +406,8 @@ void env_relocate_spec(void)
free(tmp_env1);
free(tmp_env2);
+#else
+ nand_init();
#endif /* ! ENV_IS_EMBEDDED */
}
#else /* ! CONFIG_ENV_OFFSET_REDUND */
@@ -418,6 +422,8 @@ void env_relocate_spec (void)
int ret;
char buf[CONFIG_ENV_SIZE];
+ nand_init();
+
#if defined(CONFIG_ENV_OFFSET_OOB)
ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
/*
@@ -439,6 +445,8 @@ void env_relocate_spec (void)
}
env_import(buf, 1);
+#else
+ nand_init();
#endif /* ! ENV_IS_EMBEDDED */
}
#endif /* CONFIG_ENV_OFFSET_REDUND */
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
index 47d6872..4a63d5c 100644
--- a/drivers/mtd/nand/nand.c
+++ b/drivers/mtd/nand/nand.c
@@ -81,6 +81,13 @@ void nand_init(void)
{
int i;
unsigned int size = 0;
+ static uint8_t initialized;
+
+ if (initialized)
+ return;
+ initialized = 1;
+ puts("NAND: ");
+
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
nand_init_chip(&nand_info[i], &nand_chip[i], base_address[i]);
size += nand_info[i].size / 1024;
--
1.7.3.1
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