expo: cedit: Support writing settings to CMOS RAM
Add a command to write cedit settings to CMOS RAM so that it can be
preserved across a reboot. This uses a simple bit-encoding, where each
field has a 'bit position' and a 'bit length' in the schema.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/cedit.c b/cmd/cedit.c
index b2548f4..95d5c22 100644
--- a/cmd/cedit.c
+++ b/cmd/cedit.c
@@ -10,6 +10,7 @@
#include <abuf.h>
#include <cedit.h>
#include <command.h>
+#include <dm.h>
#include <expo.h>
#include <fs.h>
#include <malloc.h>
@@ -176,6 +177,39 @@
return 0;
}
+static int do_cedit_write_cmos(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ struct udevice *dev;
+ bool verbose = false;
+ int ret;
+
+ if (check_cur_expo())
+ return CMD_RET_FAILURE;
+
+ if (argc > 1 && !strcmp(argv[1], "-v")) {
+ verbose = true;
+ argc--;
+ argv++;
+ }
+
+ if (argc > 1)
+ ret = uclass_get_device_by_name(UCLASS_RTC, argv[1], &dev);
+ else
+ ret = uclass_first_device_err(UCLASS_RTC, &dev);
+ if (ret) {
+ printf("Failed to get RTC device: %dE\n", ret);
+ return CMD_RET_FAILURE;
+ }
+
+ if (cedit_write_settings_cmos(cur_exp, dev, verbose)) {
+ printf("Failed to write settings to CMOS\n");
+ return CMD_RET_FAILURE;
+ }
+
+ return 0;
+}
+
static int do_cedit_run(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@@ -209,6 +243,7 @@
"cedit write_fdt <i/f> <dev[:part]> <filename> - write settings\n"
"cedit read_env [-v] - read settings from env vars\n"
"cedit write_env [-v] - write settings to env vars\n"
+ "cedit write_cmos [-v] [dev] - write settings to CMOS RAM\n"
"cedit run - run config editor";
#endif /* CONFIG_SYS_LONGHELP */
@@ -218,5 +253,6 @@
U_BOOT_SUBCMD_MKENT(write_fdt, 5, 1, do_cedit_write_fdt),
U_BOOT_SUBCMD_MKENT(read_env, 2, 1, do_cedit_read_env),
U_BOOT_SUBCMD_MKENT(write_env, 2, 1, do_cedit_write_env),
+ U_BOOT_SUBCMD_MKENT(write_cmos, 2, 1, do_cedit_write_cmos),
U_BOOT_SUBCMD_MKENT(run, 1, 1, do_cedit_run),
);