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authorRajkumar Kasirajan <rajkumar.kasirajan@stericsson.com>2012-05-30 16:32:37 +0530
committerLee Jones <lee.jones@linaro.org>2013-03-07 12:26:47 +0800
commitf04a9d8adf766c480353c0f2427e641251c9b059 (patch)
tree360a450f4d66089fc119bfb4a3e0f482a88973f4
parent6dbe51c251a327e012439c4772097a13df43c5b8 (diff)
mfd: ab8500-sysctrl: Update correct turn on status
In L9540, turn_on_status register is not updated correctly if the device is rebooted with AC/USB charger connected. Due to this, the device boots android instead of entering into charge only mode. Read the AC/USB status register to detect the charger presence and update the turn on status manually. Signed-off-by: Rajkumar Kasirajan <rajkumar.kasirajan@stericsson.com> Signed-off-by: Per Forlin <per.forlin@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Rupesh KUMAR <rupesh.kumar@stericsson.com> Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com> Tested-by: Rupesh KUMAR <rupesh.kumar@stericsson.com> Tested-by: Philippe LANGLAIS <philippe.langlais@stericsson.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
-rw-r--r--drivers/mfd/ab8500-core.c39
-rw-r--r--drivers/mfd/ab8500-sysctrl.c2
-rw-r--r--include/linux/mfd/abx500/ab8500.h2
3 files changed, 42 insertions, 1 deletions
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 7c84ced2e01b..50e6f1e29727 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -111,6 +111,13 @@
#define AB8500_TURN_ON_STATUS 0x00
+#define AB8500_CH_USBCH_STAT1_REG 0x02
+#define VBUS_DET_DBNC100 0x02
+#define VBUS_DET_DBNC1 0x01
+
+static DEFINE_SPINLOCK(on_stat_lock);
+static u8 turn_on_stat_mask = 0xFF;
+static u8 turn_on_stat_set;
static bool no_bm; /* No battery management */
module_param(no_bm, bool, S_IRUGO);
@@ -1171,6 +1178,15 @@ static ssize_t show_switch_off_status(struct device *dev,
return sprintf(buf, "%#x\n", value);
}
+/* use mask and set to override the register turn_on_stat value */
+void ab8500_override_turn_on_stat(u8 mask, u8 set)
+{
+ spin_lock(&on_stat_lock);
+ turn_on_stat_mask = mask;
+ turn_on_stat_set = set;
+ spin_unlock(&on_stat_lock);
+}
+
/*
* ab8500 has turned on due to (TURN_ON_STATUS):
* 0x01 PORnVbat
@@ -1194,6 +1210,20 @@ static ssize_t show_turn_on_status(struct device *dev,
AB8500_TURN_ON_STATUS, &value);
if (ret < 0)
return ret;
+
+ /*
+ * In L9540, turn_on_status register is not updated correctly if
+ * the device is rebooted with AC/USB charger connected. Due to
+ * this, the device boots android instead of entering into charge
+ * only mode. Read the AC/USB status register to detect the charger
+ * presence and update the turn on status manually.
+ */
+ if (is_ab9540(ab8500)) {
+ spin_lock(&on_stat_lock);
+ value = (value & turn_on_stat_mask) | turn_on_stat_set;
+ spin_unlock(&on_stat_lock);
+ }
+
return sprintf(buf, "%#x\n", value);
}
@@ -1399,6 +1429,15 @@ static int ab8500_probe(struct platform_device *pdev)
if (plat && plat->init)
plat->init(ab8500);
+ if (is_ab9540(ab8500)) {
+ ret = get_register_interruptible(ab8500, AB8500_CHARGER,
+ AB8500_CH_USBCH_STAT1_REG, &value);
+ if (ret < 0)
+ return ret;
+ if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
+ ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
+ AB8500_VBUS_DET);
+ }
/* Clear and mask all interrupts */
for (i = 0; i < ab8500->mask_size; i++) {
diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c
index 108fd86552f0..7c773797d267 100644
--- a/drivers/mfd/ab8500-sysctrl.c
+++ b/drivers/mfd/ab8500-sysctrl.c
@@ -21,7 +21,7 @@ void ab8500_power_off(void)
{
sigset_t old;
sigset_t all;
- static char *pss[] = {"ab8500_ac", "ab8500_usb"};
+ static char *pss[] = {"ab8500_ac", "pm2301", "ab8500_usb"};
int i;
bool charger_present = false;
union power_supply_propval val;
diff --git a/include/linux/mfd/abx500/ab8500.h b/include/linux/mfd/abx500/ab8500.h
index 9db0bda446a0..fdd8be64feeb 100644
--- a/include/linux/mfd/abx500/ab8500.h
+++ b/include/linux/mfd/abx500/ab8500.h
@@ -512,6 +512,8 @@ static inline int is_ab9540_2p0_or_earlier(struct ab8500 *ab)
return (is_ab9540(ab) && (ab->chip_id < AB8500_CUT2P0));
}
+void ab8500_override_turn_on_stat(u8 mask, u8 set);
+
#ifdef CONFIG_AB8500_DEBUG
void ab8500_dump_all_banks(struct device *dev);
void ab8500_debug_register_interrupt(int line);