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>
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 7c84ced..50e6f1e 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 @@
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 @@
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 @@
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 108fd86..7c77379 100644
--- a/drivers/mfd/ab8500-sysctrl.c
+++ b/drivers/mfd/ab8500-sysctrl.c
@@ -21,7 +21,7 @@
{
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;