power: supply: core: constify power_supply_battery_info::ocv_table

The power supply core never modifies the ocv table.
Reflect this in the API, so drivers can mark their static tables as
const.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20241005-power-supply-battery-const-v1-5-c1f721927048@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Author: t-8ch

drivers/power/supply/power_supply_core.c

@@ -777,7 +777,7 @@ int power_supply_get_battery_info(struct power_supply *psy,
 		tab_len = size / (2 * sizeof(__be32));
 		info->ocv_table_size[index] = tab_len;
 
-		table = info->ocv_table[index] =
+		info->ocv_table[index] = table =
 			devm_kcalloc(&psy->dev, tab_len, sizeof(*table), GFP_KERNEL);
 		if (!info->ocv_table[index]) {
 			power_supply_put_battery_info(psy, info);
@@ -1093,7 +1093,7 @@ EXPORT_SYMBOL_GPL(power_supply_get_maintenance_charging_setting);
  *
  * Return: the battery capacity.
  */
-int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
+int power_supply_ocv2cap_simple(const struct power_supply_battery_ocv_table *table,
 				int table_len, int ocv)
 {
 	int i, high, low;
@@ -1118,7 +1118,7 @@ int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
 }
 EXPORT_SYMBOL_GPL(power_supply_ocv2cap_simple);
 
-struct power_supply_battery_ocv_table *
+const struct power_supply_battery_ocv_table *
 power_supply_find_ocv2cap_table(struct power_supply_battery_info *info,
 				int temp, int *table_len)
 {
@@ -1149,7 +1149,7 @@ EXPORT_SYMBOL_GPL(power_supply_find_ocv2cap_table);
 int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info,
 				 int ocv, int temp)
 {
-	struct power_supply_battery_ocv_table *table;
+	const struct power_supply_battery_ocv_table *table;
 	int table_len;
 
 	table = power_supply_find_ocv2cap_table(info, temp, &table_len);

include/linux/power_supply.h

@@ -750,7 +750,7 @@ struct power_supply_battery_info {
 	int temp_alert_max;
 	int temp_min;
 	int temp_max;
-	struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX];
+	const struct power_supply_battery_ocv_table *ocv_table[POWER_SUPPLY_OCV_TEMP_MAX];
 	int ocv_table_size[POWER_SUPPLY_OCV_TEMP_MAX];
 	const struct power_supply_resistance_temp_table *resist_table;
 	int resist_table_size;
@@ -797,9 +797,9 @@ extern bool power_supply_battery_info_has_prop(struct power_supply_battery_info
 extern int power_supply_battery_info_get_prop(struct power_supply_battery_info *info,
 					      enum power_supply_property psp,
 					      union power_supply_propval *val);
-extern int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table,
+extern int power_supply_ocv2cap_simple(const struct power_supply_battery_ocv_table *table,
 				       int table_len, int ocv);
-extern struct power_supply_battery_ocv_table *
+extern const struct power_supply_battery_ocv_table *
 power_supply_find_ocv2cap_table(struct power_supply_battery_info *info,
 				int temp, int *table_len);
 extern int power_supply_batinfo_ocv2cap(struct power_supply_battery_info *info,