power: qpnp-charger: update VBAT_WEAK register in qpnp charger probe
Currently weak battery voltage threshold(VBAT_WEAK) is getting
set in bootloaders and QPNP charger driver is not modifying
VBAT_WEAK during the probe. So set the VBAT_WEAK register
explicitly in the qpnp charger probe function, if a value
is specified for it in the charger device tree node.
CRs-Fixed: 520770
Change-Id: I054e9c2bf14a666f896faf3b4c8d2a6e2201b5fb
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
diff --git a/drivers/power/qpnp-charger.c b/drivers/power/qpnp-charger.c
index 04ca7f8..a34cca6 100644
--- a/drivers/power/qpnp-charger.c
+++ b/drivers/power/qpnp-charger.c
@@ -244,6 +244,7 @@
* @btc_disabled Flag to disable btc (disables hot and cold irqs)
* @max_voltage_mv: the max volts the batt should be charged up to
* @min_voltage_mv: min battery voltage before turning the FET on
+ * @batt_weak_voltage_mv: Weak battery voltage threshold
* @max_bat_chg_current: maximum battery charge current in mA
* @warm_bat_chg_ma: warm battery maximum charge current in mA
* @cool_bat_chg_ma: cool battery maximum charge current in mA
@@ -316,6 +317,7 @@
unsigned int safe_voltage_mv;
unsigned int max_voltage_mv;
unsigned int min_voltage_mv;
+ unsigned int batt_weak_voltage_mv;
int prev_usb_max_ma;
int set_vddmax_mv;
int delta_vddmax_mv;
@@ -905,6 +907,26 @@
return vin_min_mv;
}
+#define QPNP_CHG_VBATWEAK_MIN_MV 2100
+#define QPNP_CHG_VBATWEAK_MAX_MV 3600
+#define QPNP_CHG_VBATWEAK_STEP_MV 100
+static int
+qpnp_chg_vbatweak_set(struct qpnp_chg_chip *chip, int vbatweak_mv)
+{
+ u8 temp;
+
+ if (vbatweak_mv < QPNP_CHG_VBATWEAK_MIN_MV
+ || vbatweak_mv > QPNP_CHG_VBATWEAK_MAX_MV)
+ return -EINVAL;
+
+ temp = (vbatweak_mv - QPNP_CHG_VBATWEAK_MIN_MV)
+ / QPNP_CHG_VBATWEAK_STEP_MV;
+
+ pr_debug("voltage=%d setting %02x\n", vbatweak_mv, temp);
+ return qpnp_chg_write(chip, &temp,
+ chip->chgr_base + CHGR_VBAT_WEAK, 1);
+}
+
static int
qpnp_chg_usb_iusbmax_get(struct qpnp_chg_chip *chip)
{
@@ -3665,6 +3687,8 @@
case SMBB_CHGR_SUBTYPE:
case SMBBP_CHGR_SUBTYPE:
case SMBCL_CHGR_SUBTYPE:
+ qpnp_chg_vbatweak_set(chip, chip->batt_weak_voltage_mv);
+
rc = qpnp_chg_vinmin_set(chip, chip->min_voltage_mv);
if (rc) {
pr_debug("failed setting min_voltage rc=%d\n", rc);
@@ -3987,6 +4011,7 @@
OF_PROP_READ(chip, hot_batt_p, "batt-hot-percentage", rc, 1);
OF_PROP_READ(chip, cold_batt_p, "batt-cold-percentage", rc, 1);
OF_PROP_READ(chip, soc_resume_limit, "resume-soc", rc, 1);
+ OF_PROP_READ(chip, batt_weak_voltage_mv, "vbatweak-mv", rc, 1);
if (rc)
return rc;