Merge git://git.infradead.org/battery-2.6

* git://git.infradead.org/battery-2.6:
  pda_power: Add optional OTG transceiver and voltage regulator support
  pcf50633_charger: Remove unused mbc_set_status function
  pcf50633_charger: Enable periodic charging restart

2 files changed, 148 insertions, 29 deletions

diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
index 41aec2acbb9..e8b278f7178 100644
--- a/drivers/power/pcf50633-charger.c
+++ b/drivers/power/pcf50633-charger.c
@@ -36,6 +36,8 @@ struct pcf50633_mbc {
 
 	struct power_supply usb;
 	struct power_supply adapter;
+
+	struct delayed_work charging_restart_work;
 };
 
 int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
@@ -43,6 +45,8 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
 	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
 	int ret = 0;
 	u8 bits;
+	int charging_start = 1;
+	u8 mbcs2, chgmod;
 
 	if (ma >= 1000)
 		bits = PCF50633_MBCC7_USB_1000mA;
@@ -50,8 +54,10 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
 		bits = PCF50633_MBCC7_USB_500mA;
 	else if (ma >= 100)
 		bits = PCF50633_MBCC7_USB_100mA;
-	else
+	else {
 		bits = PCF50633_MBCC7_USB_SUSPEND;
+		charging_start = 0;
+	}
 
 	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
 					PCF50633_MBCC7_USB_MASK, bits);
@@ -60,6 +66,22 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
 	else
 		dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
 
+	/* Manual charging start */
+	mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
+	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+	/* If chgmod == BATFULL, setting chgena has no effect.
+	 * We need to set resume instead.
+	 */
+	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
+		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
+				PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
+	else
+		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
+				PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
+
+	mbc->usb_active = charging_start;
+
 	power_supply_changed(&mbc->usb);
 
 	return ret;
@@ -84,21 +106,6 @@ int pcf50633_mbc_get_status(struct pcf50633 *pcf)
 }
 EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
 
-void pcf50633_mbc_set_status(struct pcf50633 *pcf, int what, int status)
-{
-	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
-
-	if (what & PCF50633_MBC_USB_ONLINE)
-		mbc->usb_online = !!status;
-	if (what & PCF50633_MBC_USB_ACTIVE)
-		mbc->usb_active = !!status;
-	if (what & PCF50633_MBC_ADAPTER_ONLINE)
-		mbc->adapter_online = !!status;
-	if (what & PCF50633_MBC_ADAPTER_ACTIVE)
-		mbc->adapter_active = !!status;
-}
-EXPORT_SYMBOL_GPL(pcf50633_mbc_set_status);
-
 static ssize_t
 show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
 {
@@ -160,10 +167,44 @@ static struct attribute_group mbc_attr_group = {
 	.attrs	= pcf50633_mbc_sysfs_entries,
 };
 
+/* MBC state machine switches into charging mode when the battery voltage
+ * falls below 96% of a battery float voltage. But the voltage drop in Li-ion
+ * batteries is marginal(1~2 %) till about 80% of its capacity - which means,
+ * after a BATFULL, charging won't be restarted until 80%.
+ *
+ * This work_struct function restarts charging at regular intervals to make
+ * sure we don't discharge too much
+ */
+
+static void pcf50633_mbc_charging_restart(struct work_struct *work)
+{
+	struct pcf50633_mbc *mbc;
+	u8 mbcs2, chgmod;
+
+	mbc = container_of(work, struct pcf50633_mbc,
+				charging_restart_work.work);
+
+	mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
+	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
+		return;
+
+	/* Restart charging */
+	pcf50633_reg_set_bit_mask(mbc->pcf, PCF50633_REG_MBCC1,
+				PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
+	mbc->usb_active = 1;
+	power_supply_changed(&mbc->usb);
+
+	dev_info(mbc->pcf->dev, "Charging restarted\n");
+}
+
 static void
 pcf50633_mbc_irq_handler(int irq, void *data)
 {
 	struct pcf50633_mbc *mbc = data;
+	int chg_restart_interval =
+			mbc->pcf->pdata->charging_restart_interval;
 
 	/* USB */
 	if (irq == PCF50633_IRQ_USBINS) {
@@ -172,6 +213,7 @@ pcf50633_mbc_irq_handler(int irq, void *data)
 		mbc->usb_online = 0;
 		mbc->usb_active = 0;
 		pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
+		cancel_delayed_work_sync(&mbc->charging_restart_work);
 	}
 
 	/* Adapter */
@@ -186,7 +228,14 @@ pcf50633_mbc_irq_handler(int irq, void *data)
 	if (irq == PCF50633_IRQ_BATFULL) {
 		mbc->usb_active = 0;
 		mbc->adapter_active = 0;
-	}
+
+		if (chg_restart_interval > 0)
+			schedule_delayed_work(&mbc->charging_restart_work,
+							chg_restart_interval);
+	} else if (irq == PCF50633_IRQ_USBLIMON)
+		mbc->usb_active = 0;
+	else if (irq == PCF50633_IRQ_USBLIMOFF)
+		mbc->usb_active = 1;
 
 	power_supply_changed(&mbc->usb);
 	power_supply_changed(&mbc->adapter);
@@ -303,6 +352,9 @@ static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	INIT_DELAYED_WORK(&mbc->charging_restart_work,
+				pcf50633_mbc_charging_restart);
+
 	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
 	if (ret)
 		dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
@@ -328,6 +380,8 @@ static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
 	power_supply_unregister(&mbc->usb);
 	power_supply_unregister(&mbc->adapter);
 
+	cancel_delayed_work_sync(&mbc->charging_restart_work);
+
 	kfree(mbc);
 
 	return 0;
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index b56a704409d..a232de6a570 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -12,11 +12,14 @@
 
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/power_supply.h>
 #include <linux/pda_power.h>
+#include <linux/regulator/consumer.h>
 #include <linux/timer.h>
 #include <linux/jiffies.h>
+#include <linux/usb/otg.h>
 
 static inline unsigned int get_irq_flags(struct resource *res)
 {
@@ -35,6 +38,11 @@ static struct timer_list supply_timer;
 static struct timer_list polling_timer;
 static int polling;
 
+#ifdef CONFIG_USB_OTG_UTILS
+static struct otg_transceiver *transceiver;
+#endif
+static struct regulator *ac_draw;
+
 enum {
 	PDA_PSY_OFFLINE = 0,
 	PDA_PSY_ONLINE = 1,
@@ -104,18 +112,35 @@ static void update_status(void)
 
 static void update_charger(void)
 {
-	if (!pdata->set_charge)
-		return;
-
-	if (new_ac_status > 0) {
-		dev_dbg(dev, "charger on (AC)\n");
-		pdata->set_charge(PDA_POWER_CHARGE_AC);
-	} else if (new_usb_status > 0) {
-		dev_dbg(dev, "charger on (USB)\n");
-		pdata->set_charge(PDA_POWER_CHARGE_USB);
-	} else {
-		dev_dbg(dev, "charger off\n");
-		pdata->set_charge(0);
+	static int regulator_enabled;
+	int max_uA = pdata->ac_max_uA;
+
+	if (pdata->set_charge) {
+		if (new_ac_status > 0) {
+			dev_dbg(dev, "charger on (AC)\n");
+			pdata->set_charge(PDA_POWER_CHARGE_AC);
+		} else if (new_usb_status > 0) {
+			dev_dbg(dev, "charger on (USB)\n");
+			pdata->set_charge(PDA_POWER_CHARGE_USB);
+		} else {
+			dev_dbg(dev, "charger off\n");
+			pdata->set_charge(0);
+		}
+	} else if (ac_draw) {
+		if (new_ac_status > 0) {
+			regulator_set_current_limit(ac_draw, max_uA, max_uA);
+			if (!regulator_enabled) {
+				dev_dbg(dev, "charger on (AC)\n");
+				regulator_enable(ac_draw);
+				regulator_enabled = 1;
+			}
+		} else {
+			if (regulator_enabled) {
+				dev_dbg(dev, "charger off\n");
+				regulator_disable(ac_draw);
+				regulator_enabled = 0;
+			}
+		}
 	}
 }
 
@@ -194,6 +219,13 @@ static void polling_timer_func(unsigned long unused)
 		  jiffies + msecs_to_jiffies(pdata->polling_interval));
 }
 
+#ifdef CONFIG_USB_OTG_UTILS
+static int otg_is_usb_online(void)
+{
+	return (transceiver->state == OTG_STATE_B_PERIPHERAL);
+}
+#endif
+
 static int pda_power_probe(struct platform_device *pdev)
 {
 	int ret = 0;
@@ -227,6 +259,9 @@ static int pda_power_probe(struct platform_device *pdev)
 	if (!pdata->polling_interval)
 		pdata->polling_interval = 2000;
 
+	if (!pdata->ac_max_uA)
+		pdata->ac_max_uA = 500000;
+
 	setup_timer(&charger_timer, charger_timer_func, 0);
 	setup_timer(&supply_timer, supply_timer_func, 0);
 
@@ -240,6 +275,13 @@ static int pda_power_probe(struct platform_device *pdev)
 		pda_psy_usb.num_supplicants = pdata->num_supplicants;
 	}
 
+	ac_draw = regulator_get(dev, "ac_draw");
+	if (IS_ERR(ac_draw)) {
+		dev_dbg(dev, "couldn't get ac_draw regulator\n");
+		ac_draw = NULL;
+		ret = PTR_ERR(ac_draw);
+	}
+
 	if (pdata->is_ac_online) {
 		ret = power_supply_register(&pdev->dev, &pda_psy_ac);
 		if (ret) {
@@ -261,6 +303,13 @@ static int pda_power_probe(struct platform_device *pdev)
 		}
 	}
 
+#ifdef CONFIG_USB_OTG_UTILS
+	transceiver = otg_get_transceiver();
+	if (transceiver && !pdata->is_usb_online) {
+		pdata->is_usb_online = otg_is_usb_online;
+	}
+#endif
+
 	if (pdata->is_usb_online) {
 		ret = power_supply_register(&pdev->dev, &pda_psy_usb);
 		if (ret) {
@@ -300,10 +349,18 @@ usb_irq_failed:
 usb_supply_failed:
 	if (pdata->is_ac_online && ac_irq)
 		free_irq(ac_irq->start, &pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+	if (transceiver)
+		otg_put_transceiver(transceiver);
+#endif
 ac_irq_failed:
 	if (pdata->is_ac_online)
 		power_supply_unregister(&pda_psy_ac);
 ac_supply_failed:
+	if (ac_draw) {
+		regulator_put(ac_draw);
+		ac_draw = NULL;
+	}
 	if (pdata->exit)
 		pdata->exit(dev);
 init_failed:
@@ -327,6 +384,14 @@ 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);
+#ifdef CONFIG_USB_OTG_UTILS
+	if (transceiver)
+		otg_put_transceiver(transceiver);
+#endif
+	if (ac_draw) {
+		regulator_put(ac_draw);
+		ac_draw = NULL;
+	}
 	if (pdata->exit)
 		pdata->exit(dev);