bootm: Tidy up use of autostart env var
This has different semantics in different places. Go with the bootm method
and put it in a common function so that the behaviour is consistent in
U-Boot. Update the docs.
To be clear, this changes the way that 'bootelf' and standalone boot
work. Before, if autostart was set to "fred" or "YES", for example, they
would consider that a "yes". This may change behaviour for some boards,
but the only in-tree boards which mention autostart use "no" to disable
it, which will still work.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Wolfgang Denk <wd@denx.de>
diff --git a/cmd/elf.c b/cmd/elf.c
index d75b214..2b33c50 100644
--- a/cmd/elf.c
+++ b/cmd/elf.c
@@ -41,7 +41,6 @@
unsigned long addr; /* Address of the ELF image */
unsigned long rc; /* Return value from user code */
char *sload = NULL;
- const char *ep = env_get("autostart");
int rcode = 0;
/* Consume 'bootelf' */
@@ -69,7 +68,7 @@
else
addr = load_elf_image_shdr(addr);
- if (ep && !strcmp(ep, "no"))
+ if (!env_get_autostart())
return rcode;
printf("## Starting application at 0x%08lx ...\n", addr);