Add CMD_FUSE_WRITEBUFF config option to add and enable fuse writebuff
sub-system command. Add fuse_writebuff function to be invoked on
writebuff command.
Signed-off-by: Harsha Vardhan V M <h...@ti.com>
Reviewed-by: Tom Rini <tr...@konsulko.com>
---
cmd/Kconfig | 8 ++++++++
cmd/fuse.c | 30 +++++++++++++++++++++++++-----
include/fuse.h | 9 +++++++++
3 files changed, 42 insertions(+), 5 deletions(-)
diff --git a/cmd/Kconfig b/cmd/Kconfig
index cd391d422ae..81c59becc2d 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1236,6 +1236,14 @@ config CMD_FUSE
which control the behaviour of the device. The command uses the
fuse_...() API.
+config CMD_FUSE_WRITEBUFF
+ bool "Support for the fuse writebuff"
+ depends on CMD_FUSE
+ help
+ This allows programming fuses, which control the behaviour of
+ the device, using a structured buffer in memory. The command
+ uses the fuse_writebuff() API.
+
config CMD_GPIO
bool "gpio"
help
diff --git a/cmd/fuse.c b/cmd/fuse.c
index a23cedba90f..6c42c096809 100644
--- a/cmd/fuse.c
+++ b/cmd/fuse.c
@@ -43,11 +43,18 @@ static int do_fuse(struct cmd_tbl *cmdtp, int flag, int
argc,
argc -= 2 + confirmed;
argv += 2 + confirmed;
- if (argc < 2)
- return CMD_RET_USAGE;
+ if (IS_ENABLED(CONFIG_CMD_FUSE_WRITEBUFF) && !strcmp(op, "writebuff")) {
+ if (argc == 1)
+ addr = simple_strtoul(argv[0], NULL, 16);
+ else
+ return CMD_RET_USAGE;
+ } else {
+ if (argc < 2)
+ return CMD_RET_USAGE;
- bank = simple_strtoul(argv[0], NULL, 0);
- word = simple_strtoul(argv[1], NULL, 0);
+ bank = simple_strtoul(argv[0], NULL, 0);
+ word = simple_strtoul(argv[1], NULL, 0);
+ }
if (!strcmp(op, "read")) {
if (argc == 2)
@@ -161,6 +168,15 @@ static int do_fuse(struct cmd_tbl *cmdtp, int flag, int
argc,
if (ret)
goto err;
}
+ } else if (IS_ENABLED(CONFIG_CMD_FUSE_WRITEBUFF) && !strcmp(op,
"writebuff")) {
+ printf("Programming fuses using a structured buffer in memory "
+ "starting at addr 0x%lx\n", addr);
+ if (!confirmed && !confirm_prog())
+ return CMD_RET_FAILURE;
+
+ ret = fuse_writebuff(addr);
+ if (ret)
+ goto err;
} else {
return CMD_RET_USAGE;
}
@@ -186,5 +202,9 @@ U_BOOT_CMD(
"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
" several fuse words, starting at 'word' (PERMANENT)\n"
"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
- " several fuse words, starting at 'word'"
+ " several fuse words, starting at 'word'\n"
+#ifdef CONFIG_CMD_FUSE_WRITEBUFF
+ "fuse writebuff [-y] <addr> - program fuse data\n"
+ " using a structured buffer in memory starting at 'addr'\n"
+#endif /* CONFIG_CMD_FUSE_WRITEBUFF */
);
diff --git a/include/fuse.h b/include/fuse.h
index 4519821af7e..902b5f56a74 100644
--- a/include/fuse.h
+++ b/include/fuse.h
@@ -12,6 +12,7 @@
#define _FUSE_H_
#include <linux/types.h>
+#include <linux/errno.h>
/*
* Read/Sense/Program/Override interface:
@@ -25,5 +26,13 @@ int fuse_read(u32 bank, u32 word, u32 *val);
int fuse_sense(u32 bank, u32 word, u32 *val);
int fuse_prog(u32 bank, u32 word, u32 val);
int fuse_override(u32 bank, u32 word, u32 val);
+#ifdef CONFIG_CMD_FUSE_WRITEBUFF
+int fuse_writebuff(ulong addr);
+#else
+static inline int fuse_writebuff(ulong addr)
+{
+ return -EPERM;
+}
+#endif /* CONFIG_CMD_FUSE_WRITEBUFF */
#endif /* _FUSE_H_ */
--
2.34.1
