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authorPaul Fertser <fercerpav@gmail.com>2009-11-05 00:24:59 +0300
committerAnton Vorontsov <cbouatmailru@gmail.com>2009-11-16 03:32:09 +0300
commitc329795052aa339850a45fab649ab97a36905136 (patch)
tree96bc7769c35baaec5d87c0ab418e333b6983eeac
parent1282b35a1edf5f12ae58a2b16ae8615dfe0d9ecc (diff)
pcf50633: Query charger status directly
Current scheme is fragile and is likely to go off sync, especially on batfull->adapter charging automatic MBC transition. Query the status bit every time we need it instead. We need to export another function to query for USB presence because we can't read anything from PCF50633 (via I2C) inside irq context and that is needed by usb gadgets. Signed-off-by: Paul Fertser <fercerpav@gmail.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
-rw-r--r--drivers/power/pcf50633-charger.c50
-rw-r--r--include/linux/mfd/pcf50633/mbc.h1
2 files changed, 30 insertions, 21 deletions
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
index 47187337b96..b915a008f58 100644
--- a/drivers/power/pcf50633-charger.c
+++ b/drivers/power/pcf50633-charger.c
@@ -29,9 +29,7 @@
struct pcf50633_mbc {
struct pcf50633 *pcf;
- int adapter_active;
int adapter_online;
- int usb_active;
int usb_online;
struct power_supply usb;
@@ -88,7 +86,7 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
}
- mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
+ mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
/* If chgmod == BATFULL, setting chgena has no effect.
@@ -105,8 +103,6 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
}
- mbc->usb_active = charging_start;
-
power_supply_changed(&mbc->usb);
return ret;
@@ -117,20 +113,44 @@ int pcf50633_mbc_get_status(struct pcf50633 *pcf)
{
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)
{
@@ -248,26 +268,14 @@ pcf50633_mbc_irq_handler(int irq, void *data)
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);
}
/* 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;
- } 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);
diff --git a/include/linux/mfd/pcf50633/mbc.h b/include/linux/mfd/pcf50633/mbc.h
index 4119579acf2..df4f5fa88de 100644
--- a/include/linux/mfd/pcf50633/mbc.h
+++ b/include/linux/mfd/pcf50633/mbc.h
@@ -128,6 +128,7 @@ enum pcf50633_reg_mbcs3 {
int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma);
int pcf50633_mbc_get_status(struct pcf50633 *);
+int pcf50633_mbc_get_usb_online_status(struct pcf50633 *);
#endif