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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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13
include/cedit.h
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@@ -97,4 +97,17 @@ int cedit_write_settings_env(struct expo *exp, bool verbose);
*/
int cedit_read_settings_env(struct expo *exp, bool verbose);
/**
* cedit_write_settings_cmos() - Write settings to CMOS RAM
*
* Write settings to the defined places in CMOS RAM
*
* @exp: Expo to write settings from
* @dev: UCLASS_RTC device containing space for this information
* Returns 0 if OK, -ve on error
* @verbose: true to print a summary at the end
*/
int cedit_write_settings_cmos(struct expo *exp, struct udevice *dev,
bool verbose);
#endif /* __CEDIT_H */