rtc: rv3028: Fix backup-switchover-mode crash

Commit "rtc: rv3028: Mirror BSM and TCE/TCR to EEPROM" was a
forward-port from rpi-5.9.y, and between then and rpi-5.15.y the
rv3028_eeprom_read function was changed from requiring a regmap
pointer to a pointer to the rv3028_data structure. However,
because the declaration specifies a void * pointer, the compiler issues
no warning and the added call to rv3028_eeprom_read leads to an
exception when backup-switchover-mode is used.

See: #2912

Signed-off-by: Phil Elwell <[email protected]>

drivers/rtc/rtc-rv3028.c

@@ -963,8 +963,7 @@ static int rv3028_probe(struct i2c_client *client)
 	}
 
 	if (backup_mask) {
-		ret = rv3028_eeprom_read((void *)(rv3028->regmap),
-					 RV3028_BACKUP,
+		ret = rv3028_eeprom_read((void *)rv3028, RV3028_BACKUP,
 					 (void *)&backup, 1);
 		/* Write register and EEPROM if needed */
 		if (!ret && (backup & backup_mask) != backup_bits) {