pm2301: Provide u9540 support for the pm2301 charger

AC charger driver for the DB9540 based platforms.

Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com>
Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Michel JAOUEN <michel.jaouen@stericsson.com>
Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com>

drivers/power/Kconfig

@@ -346,6 +346,13 @@ config AB8500_BM
 	help
 	  Say Y to include support for AB8500 battery management.
 
+config CHARGER_PM2301
+	bool "PM2301 Battery Charger Driver"
+	depends on AB8500_BM
+	help
+	  Say Y to include support for PM2301 charger driver.
+	  Depends on AB8500 battery management core.
+
 source "drivers/power/reset/Kconfig"
 
 endif # POWER_SUPPLY

drivers/power/Makefile

@@ -46,6 +46,7 @@ obj-$(CONFIG_CHARGER_LP8727)	+= lp8727_charger.o
 obj-$(CONFIG_CHARGER_LP8788)	+= lp8788-charger.o
 obj-$(CONFIG_CHARGER_GPIO)	+= gpio-charger.o
 obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o
+obj-$(CONFIG_CHARGER_PM2301)	+= pm2301_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o

drivers/power/ab8500_charger.c

@@ -2830,8 +2830,11 @@ static int ab8500_charger_remove(struct platform_device *pdev)
 	destroy_workqueue(di->charger_wq);
 
 	flush_scheduled_work();
-	power_supply_unregister(&di->usb_chg.psy);
-	power_supply_unregister(&di->ac_chg.psy);
+	if(di->usb_chg.enabled)
+		power_supply_unregister(&di->usb_chg.psy);
+	if(di->ac_chg.enabled)
+		power_supply_unregister(&di->ac_chg.psy);
+
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;
@@ -2899,6 +2902,7 @@ static int ab8500_charger_probe(struct platform_device *pdev)
 		ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
 	di->ac_chg.max_out_curr = ab8500_charger_current_map[
 		ARRAY_SIZE(ab8500_charger_current_map) - 1];
+	di->ac_chg.enabled = di->pdata->ac_enabled;
 
 	/* USB supply */
 	/* power_supply base class */
@@ -2917,7 +2921,7 @@ static int ab8500_charger_probe(struct platform_device *pdev)
 		ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
 	di->usb_chg.max_out_curr = ab8500_charger_current_map[
 		ARRAY_SIZE(ab8500_charger_current_map) - 1];
-
+	di->usb_chg.enabled = di->pdata->usb_enabled;
 
 	/* Create a work queue for the charger */
 	di->charger_wq =
@@ -2995,17 +2999,21 @@ static int ab8500_charger_probe(struct platform_device *pdev)
 	}
 
 	/* Register AC charger class */
-	ret = power_supply_register(di->dev, &di->ac_chg.psy);
-	if (ret) {
-		dev_err(di->dev, "failed to register AC charger\n");
-		goto free_charger_wq;
+	if(di->ac_chg.enabled) {
+		ret = power_supply_register(di->dev, &di->ac_chg.psy);
+		if (ret) {
+			dev_err(di->dev, "failed to register AC charger\n");
+			goto free_charger_wq;
+		}
 	}
 
 	/* Register USB charger class */
-	ret = power_supply_register(di->dev, &di->usb_chg.psy);
-	if (ret) {
-		dev_err(di->dev, "failed to register USB charger\n");
-		goto free_ac;
+	if(di->usb_chg.enabled) {
+		ret = power_supply_register(di->dev, &di->usb_chg.psy);
+		if (ret) {
+			dev_err(di->dev, "failed to register USB charger\n");
+			goto free_ac;
+		}
 	}
 
 	di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
@@ -3085,9 +3093,11 @@ free_irq:
 put_usb_phy:
 	usb_put_phy(di->usb_phy);
 free_usb:
-	power_supply_unregister(&di->usb_chg.psy);
+	if(di->usb_chg.enabled)
+		power_supply_unregister(&di->usb_chg.psy);
 free_ac:
-	power_supply_unregister(&di->ac_chg.psy);
+	if(di->ac_chg.enabled)
+		power_supply_unregister(&di->ac_chg.psy);
 free_charger_wq:
 	destroy_workqueue(di->charger_wq);
 	return ret;

include/linux/mfd/abx500/ab8500-bm.h

@@ -406,6 +406,8 @@ struct ab8500_charger_platform_data {
 	char **supplied_to;
 	size_t num_supplicants;
 	bool autopower_cfg;
+	bool ac_enabled;
+	bool usb_enabled;
 };
 
 struct ab8500_btemp_platform_data {

include/linux/mfd/abx500/ux500_chargalg.h

@@ -27,12 +27,14 @@ struct ux500_charger_ops {
  * @ops			ux500 charger operations
  * @max_out_volt	maximum output charger voltage in mV
  * @max_out_curr	maximum output charger current in mA
+ * @enabled		indicates if this charger is used or not
  */
 struct ux500_charger {
 	struct power_supply psy;
 	struct ux500_charger_ops ops;
 	int max_out_volt;
 	int max_out_curr;
+	bool enabled;
 };
 
 #endif

include/linux/pm2301_charger.h

@@ -0,0 +1,60 @@
+/*
+ * PM2301 charger driver.
+ *
+ * Copyright (C) 2012 ST Ericsson Corporation
+ *
+ * Contact: Olivier LAUNAY (olivier.launay@stericsson.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef __LINUX_PM2301_H
+#define __LINUX_PM2301_H
+
+/**
+ * struct pm2xxx_bm_charger_parameters - Charger specific parameters
+ * @ac_volt_max:	maximum allowed AC charger voltage in mV
+ * @ac_curr_max:	maximum allowed AC charger current in mA
+ */
+struct pm2xxx_bm_charger_parameters {
+	int ac_volt_max;
+	int ac_curr_max;
+};
+
+/**
+ * struct pm2xxx_bm_data - pm2xxx battery management data
+ * @enable_overshoot    flag to enable VBAT overshoot control
+ * @chg_params	  charger parameters
+ */
+struct pm2xxx_bm_data {
+	bool enable_overshoot;
+	const struct pm2xxx_bm_charger_parameters *chg_params;
+};
+
+struct pm2xxx_charger_platform_data {
+	char **supplied_to;
+	size_t num_supplicants;
+	int i2c_bus;
+	const char *label;
+	int irq_number;
+	int irq_type;
+};
+
+struct pm2xxx_platform_data {
+	struct pm2xxx_charger_platform_data *wall_charger;
+	struct pm2xxx_bm_data *battery;
+};
+
+#endif /* __LINUX_PM2301_H */