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expo: cedit: Support writing settings to CMOS RAM

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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>
This commit is contained in:
Simon Glass
2023-08-14 16:40:37 -06:00
committed by Tom Rini
parent bcf2b7202e
commit eb6c71b562
9 changed files with 266 additions and 3 deletions
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30
test/boot/cedit.c
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@@ -155,3 +155,33 @@ static int cedit_env(struct unit_test_state *uts)
return 0;
}
BOOTSTD_TEST(cedit_env, 0);
/* Check the cedit write_cmos and read_cmos commands */
static int cedit_cmos(struct unit_test_state *uts)
{
struct scene_obj_menu *menu, *menu2;
struct video_priv *vid_priv;
extern struct expo *cur_exp;
struct scene *scn;
console_record_reset_enable();
ut_assertok(run_command("cedit load hostfs - cedit.dtb", 0));
ut_asserteq(ID_SCENE1, cedit_prepare(cur_exp, &vid_priv, &scn));
/* get the menus to fiddle with */
menu = scene_obj_find(scn, ID_CPU_SPEED, SCENEOBJT_MENU);
ut_assertnonnull(menu);
menu->cur_item_id = ID_CPU_SPEED_2;
menu2 = scene_obj_find(scn, ID_POWER_LOSS, SCENEOBJT_MENU);
ut_assertnonnull(menu2);
menu2->cur_item_id = ID_AC_MEMORY;
ut_assertok(run_command("cedit write_cmos -v", 0));
ut_assert_nextlinen("Write 2 bytes from offset 80 to 84");
ut_assert_console_end();
return 0;
}
BOOTSTD_TEST(cedit_cmos, 0);

5
test/boot/files/expo_layout.dts
View File

@@ -38,6 +38,9 @@
/* IDs for the menu items */
item-id = <ID_CPU_SPEED_1 ID_CPU_SPEED_2
ID_CPU_SPEED_3>;
start-bit = <0x400>;
bit-length = <2>;
};
power-loss {
@@ -49,6 +52,8 @@
"Memory";
item-id = <ID_AC_OFF ID_AC_ON ID_AC_MEMORY>;
start-bit = <0x422>;
bit-length = <2>;
};
};
};