power: qpnp-charger: add ext ovp support
Some platform configurations require an
external OVP when using a DCP charger and
fast charging. This external OVP is connected
in parallel to reduce the input resistance
of the charge path to allow more current
to be pumped into the battery.
This additional external ovp needs to be
communicated to userspace services since
the input current limit only impacts the
USBIN charge path and not the newly added
path added by the external OVP. To allow for
userspace binaries to adjust the input current
limit correctly also expose the usb trim register
via the power supply framework.
CRs-Fixed: 532962
Change-Id: I4734f4734f89d8c26508e543398b4b291f1bed29
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
diff --git a/drivers/power/qpnp-charger.c b/drivers/power/qpnp-charger.c
index 8e42912..205e067 100644
--- a/drivers/power/qpnp-charger.c
+++ b/drivers/power/qpnp-charger.c
@@ -82,6 +82,7 @@
#define CHGR_USB_USB_SUSP 0x47
#define CHGR_USB_USB_OTG_CTL 0x48
#define CHGR_USB_ENUM_T_STOP 0x4E
+#define CHGR_USB_TRIM 0xF1
#define CHGR_CHG_TEMP_THRESH 0x66
#define CHGR_BAT_IF_PRES_STATUS 0x08
#define CHGR_STATUS 0x09
@@ -742,6 +743,48 @@
}
static int
+qpnp_chg_iusb_trim_get(struct qpnp_chg_chip *chip)
+{
+ int rc = 0;
+ u8 trim_reg;
+
+ rc = qpnp_chg_read(chip, &trim_reg,
+ chip->usb_chgpth_base + CHGR_USB_TRIM, 1);
+ if (rc) {
+ pr_err("failed to read USB_TRIM rc=%d\n", rc);
+ return 0;
+ }
+
+ return trim_reg;
+}
+
+static int
+qpnp_chg_iusb_trim_set(struct qpnp_chg_chip *chip, int trim)
+{
+ int rc = 0;
+
+ rc = qpnp_chg_masked_write(chip,
+ chip->usb_chgpth_base + SEC_ACCESS,
+ 0xFF,
+ 0xA5, 1);
+ if (rc) {
+ pr_err("failed to write SEC_ACCESS rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = qpnp_chg_masked_write(chip,
+ chip->usb_chgpth_base + CHGR_USB_TRIM,
+ 0xFF,
+ trim, 1);
+ if (rc) {
+ pr_err("failed to write USB TRIM rc=%d\n", rc);
+ return rc;
+ }
+
+ return rc;
+}
+
+static int
qpnp_chg_iusbmax_set(struct qpnp_chg_chip *chip, int mA)
{
int rc = 0;
@@ -1544,6 +1587,7 @@
case POWER_SUPPLY_PROP_CHARGING_ENABLED:
case POWER_SUPPLY_PROP_SYSTEM_TEMP_LEVEL:
case POWER_SUPPLY_PROP_INPUT_CURRENT_MAX:
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_TRIM:
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
case POWER_SUPPLY_PROP_COOL_TEMP:
case POWER_SUPPLY_PROP_WARM_TEMP:
@@ -1654,6 +1698,7 @@
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_INPUT_CURRENT_MAX,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_TRIM,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_REGULATION,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
@@ -1676,7 +1721,11 @@
static int charger_monitor;
module_param(charger_monitor, int, 0644);
+static int ext_ovp_present;
+module_param(ext_ovp_present, int, 0444);
+
#define USB_WALL_THRESHOLD_MA 500
+#define OVP_USB_WALL_THRESHOLD_MA 200
static int
qpnp_power_get_property_mains(struct power_supply *psy,
enum power_supply_property psp,
@@ -2018,8 +2067,12 @@
if (((ret.intval / 1000) > USB_WALL_THRESHOLD_MA)
&& (charger_monitor ||
!chip->charger_monitor_checked)) {
- qpnp_chg_iusbmax_set(chip,
+ if (!ext_ovp_present)
+ qpnp_chg_iusbmax_set(chip,
USB_WALL_THRESHOLD_MA);
+ else
+ qpnp_chg_iusbmax_set(chip,
+ OVP_USB_WALL_THRESHOLD_MA);
} else {
qpnp_chg_iusbmax_set(chip, ret.intval / 1000);
}
@@ -2111,6 +2164,9 @@
case POWER_SUPPLY_PROP_INPUT_CURRENT_MAX:
val->intval = qpnp_chg_usb_iusbmax_get(chip) * 1000;
break;
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_TRIM:
+ val->intval = qpnp_chg_iusb_trim_get(chip);
+ break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
val->intval = qpnp_chg_vinmin_get(chip) * 1000;
break;
@@ -3172,6 +3228,9 @@
case POWER_SUPPLY_PROP_INPUT_CURRENT_MAX:
qpnp_chg_iusbmax_set(chip, val->intval / 1000);
break;
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_TRIM:
+ qpnp_chg_iusb_trim_set(chip, val->intval);
+ break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
qpnp_chg_vinmin_set(chip, val->intval / 1000);
break;
@@ -3894,6 +3953,9 @@
chip->btc_disabled = of_property_read_bool(chip->spmi->dev.of_node,
"qcom,btc-disabled");
+ ext_ovp_present = of_property_read_bool(chip->spmi->dev.of_node,
+ "qcom,ext-ovp-present");
+
/* Get the charging-disabled property */
chip->charging_disabled = of_property_read_bool(chip->spmi->dev.of_node,
"qcom,charging-disabled");