struct pcf50633_mbc {
struct pcf50633 *pcf;
- int adapter_active;
int adapter_online;
- int usb_active;
int usb_online;
struct power_supply usb;
struct power_supply adapter;
-
- struct delayed_work charging_restart_work;
+ struct power_supply ac;
};
int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
u8 bits;
int charging_start = 1;
u8 mbcs2, chgmod;
+ unsigned int mbcc5;
- if (ma >= 1000)
+ if (ma >= 1000) {
bits = PCF50633_MBCC7_USB_1000mA;
- else if (ma >= 500)
+ ma = 1000;
+ } else if (ma >= 500) {
bits = PCF50633_MBCC7_USB_500mA;
- else if (ma >= 100)
+ ma = 500;
+ } else if (ma >= 100) {
bits = PCF50633_MBCC7_USB_100mA;
- else {
+ ma = 100;
+ } else {
bits = PCF50633_MBCC7_USB_SUSPEND;
charging_start = 0;
+ ma = 0;
}
ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
else
dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
- /* Manual charging start */
- mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
+ /*
+ * We limit the charging current to be the USB current limit.
+ * The reason is that on pcf50633, when it enters PMU Standby mode,
+ * which it does when the device goes "off", the USB current limit
+ * reverts to the variant default. In at least one common case, that
+ * default is 500mA. By setting the charging current to be the same
+ * as the USB limit we set here before PMU standby, we enforce it only
+ * using the correct amount of current even when the USB current limit
+ * gets reset to the wrong thing
+ */
+
+ if (mbc->pcf->pdata->charger_reference_current_ma) {
+ mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
+ if (mbcc5 > 255)
+ mbcc5 = 255;
+ pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
+ }
+
+ mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
/* If chgmod == BATFULL, setting chgena has no effect.
- * We need to set resume instead.
+ * Datasheet says we need to set resume instead but when autoresume is
+ * used resume doesn't work. Clear and set chgena instead.
*/
if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
- else
+ else {
+ pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
+ PCF50633_MBCC1_CHGENA);
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
- PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
-
- mbc->usb_active = charging_start;
+ PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
+ }
power_supply_changed(&mbc->usb);
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
int status = 0;
+ u8 chgmod;
+
+ if (!mbc)
+ return 0;
+
+ chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
+ & PCF50633_MBCS2_MBC_MASK;
if (mbc->usb_online)
status |= PCF50633_MBC_USB_ONLINE;
- if (mbc->usb_active)
+ if (chgmod == PCF50633_MBCS2_MBC_USB_PRE ||
+ chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT ||
+ chgmod == PCF50633_MBCS2_MBC_USB_FAST ||
+ chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
status |= PCF50633_MBC_USB_ACTIVE;
if (mbc->adapter_online)
status |= PCF50633_MBC_ADAPTER_ONLINE;
- if (mbc->adapter_active)
+ if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE ||
+ chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT ||
+ chgmod == PCF50633_MBCS2_MBC_ADP_FAST ||
+ chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
status |= PCF50633_MBC_ADAPTER_ACTIVE;
return status;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
+int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
+{
+ struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
+
+ if (!mbc)
+ return 0;
+
+ return mbc->usb_online;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);
+
static ssize_t
show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
{
static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
+static ssize_t
+show_chglim(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+ u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
+ unsigned int ma;
+
+ if (!mbc->pcf->pdata->charger_reference_current_ma)
+ return -ENODEV;
+
+ ma = (mbc->pcf->pdata->charger_reference_current_ma * mbcc5) >> 8;
+
+ return sprintf(buf, "%u\n", ma);
+}
+
+static ssize_t set_chglim(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+ unsigned long ma;
+ unsigned int mbcc5;
+ int ret;
+
+ if (!mbc->pcf->pdata->charger_reference_current_ma)
+ return -ENODEV;
+
+ ret = strict_strtoul(buf, 10, &ma);
+ if (ret)
+ return -EINVAL;
+
+ mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
+ if (mbcc5 > 255)
+ mbcc5 = 255;
+ pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
+
+ return count;
+}
+
+/*
+ * This attribute allows to change MBC charging limit on the fly
+ * independently of usb current limit. It also gets set automatically every
+ * time usb current limit is changed.
+ */
+static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim);
+
static struct attribute *pcf50633_mbc_sysfs_entries[] = {
&dev_attr_chgmode.attr,
&dev_attr_usb_curlim.attr,
+ &dev_attr_chg_curlim.attr,
NULL,
};
.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) {
mbc->usb_online = 1;
} else if (irq == PCF50633_IRQ_USBREM) {
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 */
- if (irq == PCF50633_IRQ_ADPINS) {
+ if (irq == PCF50633_IRQ_ADPINS)
mbc->adapter_online = 1;
- mbc->adapter_active = 1;
- } else if (irq == PCF50633_IRQ_ADPREM) {
+ else if (irq == PCF50633_IRQ_ADPREM)
mbc->adapter_online = 0;
- mbc->adapter_active = 0;
- }
-
- 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->ac);
power_supply_changed(&mbc->usb);
power_supply_changed(&mbc->adapter);
{
struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
int ret = 0;
+ u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
+ PCF50633_MBCC7_USB_MASK;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
- val->intval = mbc->usb_online;
+ val->intval = mbc->usb_online &&
+ (usblim <= PCF50633_MBCC7_USB_500mA);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static int ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, ac);
+ int ret = 0;
+ u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
+ PCF50633_MBCC7_USB_MASK;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = mbc->usb_online &&
+ (usblim == PCF50633_MBCC7_USB_1000mA);
break;
default:
ret = -EINVAL;
static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
{
struct pcf50633_mbc *mbc;
- struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
int ret;
int i;
u8 mbcs1;
return -ENOMEM;
platform_set_drvdata(pdev, mbc);
- mbc->pcf = pdata->pcf;
+ mbc->pcf = dev_to_pcf50633(pdev->dev.parent);
/* Set up IRQ handlers */
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
mbc->usb.supplied_to = mbc->pcf->pdata->batteries;
mbc->usb.num_supplicants = mbc->pcf->pdata->num_batteries;
+ mbc->ac.name = "ac";
+ mbc->ac.type = POWER_SUPPLY_TYPE_MAINS;
+ mbc->ac.properties = power_props;
+ mbc->ac.num_properties = ARRAY_SIZE(power_props);
+ mbc->ac.get_property = ac_get_property;
+ mbc->ac.supplied_to = mbc->pcf->pdata->batteries;
+ mbc->ac.num_supplicants = mbc->pcf->pdata->num_batteries;
+
ret = power_supply_register(&pdev->dev, &mbc->adapter);
if (ret) {
dev_err(mbc->pcf->dev, "failed to register adapter\n");
return ret;
}
- INIT_DELAYED_WORK(&mbc->charging_restart_work,
- pcf50633_mbc_charging_restart);
+ ret = power_supply_register(&pdev->dev, &mbc->ac);
+ if (ret) {
+ dev_err(mbc->pcf->dev, "failed to register ac\n");
+ power_supply_unregister(&mbc->adapter);
+ power_supply_unregister(&mbc->usb);
+ kfree(mbc);
+ return ret;
+ }
ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
if (ret)
power_supply_unregister(&mbc->usb);
power_supply_unregister(&mbc->adapter);
-
- cancel_delayed_work_sync(&mbc->charging_restart_work);
+ power_supply_unregister(&mbc->ac);
kfree(mbc);
projects / linux-flexiantxendom0-3.2.10.git / blobdiff