pda_power: add init and exit function callbacks

This adds init/exit function callbacks to pda_power, to
provide a place where the platform code can request/free
GPIOs that it wants to use in the is_ac_online, is_usb_online
and set_charge functions.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

drivers/power/pda_power.c

@@ -209,6 +209,12 @@ static int pda_power_probe(struct platform_device *pdev)
 
 	pdata = pdev->dev.platform_data;
 
+	if (pdata->init) {
+		ret = pdata->init(dev);
+		if (ret < 0)
+			goto init_failed;
+	}
+
 	update_status();
 	update_charger();
 
@@ -298,6 +304,9 @@ static int pda_power_probe(struct platform_device *pdev)
 	if (pdata->is_ac_online)
 		power_supply_unregister(&pda_psy_ac);
 ac_supply_failed:
+	if (pdata->exit)
+		pdata->exit(dev);
+init_failed:
 wrongid:
 	return ret;
 }
@@ -318,6 +327,8 @@ static int pda_power_remove(struct platform_device *pdev)
 		power_supply_unregister(&pda_psy_usb);
 	if (pdata->is_ac_online)
 		power_supply_unregister(&pda_psy_ac);
+	if (pdata->exit)
+		pdata->exit(dev);
 
 	return 0;
 }

include/linux/pda_power.h

@@ -16,10 +16,14 @@
 #define PDA_POWER_CHARGE_AC  (1 << 0)
 #define PDA_POWER_CHARGE_USB (1 << 1)
 
+struct device;
+
 struct pda_power_pdata {
+	int (*init)(struct device *dev);
 	int (*is_ac_online)(void);
 	int (*is_usb_online)(void);
 	void (*set_charge)(int flags);
+	void (*exit)(struct device *dev);
 
 	char **supplied_to;
 	size_t num_supplicants;