power: smb-lib: Add support for SW based OV detection

Add support for software based USBIN OV detection, once
OV condition is detected, software will force USBIN to 5V
and continue charging with 5V.

Change-Id: Ie8f00f69db4ac6330d9da82b3455e4efab43861a
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>

diff --git a/drivers/power/supply/qcom/qpnp-smb2.c b/drivers/power/supply/qcom/qpnp-smb2.c
index 4beaddf..ddb1d7e 100644 (file)
--- a/drivers/power/supply/qcom/qpnp-smb2.c
+++ b/drivers/power/supply/qcom/qpnp-smb2.c
@@ -1844,7 +1844,7 @@ static int smb2_chg_config_init(struct smb2 *chip)
                break;
        case PM660_SUBTYPE:
                chip->chg.smb_version = PM660_SUBTYPE;
-               chip->chg.wa_flags |= BOOST_BACK_WA | OTG_WA;
+               chip->chg.wa_flags |= BOOST_BACK_WA | OTG_WA | OV_IRQ_WA_BIT;
                chg->param.freq_buck = pm660_params.freq_buck;
                chg->param.freq_boost = pm660_params.freq_boost;
                chg->chg_freq.freq_5V           = 650;

diff --git a/drivers/power/supply/qcom/smb-lib.c b/drivers/power/supply/qcom/smb-lib.c
index 56a42e2..b70e164 100644 (file)
--- a/drivers/power/supply/qcom/smb-lib.c
+++ b/drivers/power/supply/qcom/smb-lib.c
@@ -670,6 +670,7 @@ static void smblib_uusb_removal(struct smb_charger *chg)
        vote(chg->pl_enable_votable_indirect, USBIN_V_VOTER, false, 0);
        vote(chg->usb_icl_votable, SW_QC3_VOTER, false, 0);
        vote(chg->usb_icl_votable, USBIN_USBIN_BOOST_VOTER, false, 0);
+       vote(chg->hvdcp_hw_inov_dis_votable, OV_VOTER, false, 0);
 
        cancel_delayed_work_sync(&chg->hvdcp_detect_work);
 
@@ -3453,6 +3454,33 @@ static void smblib_handle_sdp_enumeration_done(struct smb_charger *chg,
                   rising ? "rising" : "falling");
 }
 
+#define MICRO_10P3V    10300000
+static void smblib_check_ov_condition(struct smb_charger *chg)
+{
+       union power_supply_propval pval = {0, };
+       int rc;
+
+       if (chg->wa_flags & OV_IRQ_WA_BIT) {
+               rc = power_supply_get_property(chg->usb_psy,
+                       POWER_SUPPLY_PROP_VOLTAGE_NOW, &pval);
+               if (rc < 0) {
+                       smblib_err(chg, "Couldn't get current voltage, rc=%d\n",
+                               rc);
+                       return;
+               }
+
+               if (pval.intval > MICRO_10P3V) {
+                       smblib_err(chg, "USBIN OV detected\n");
+                       vote(chg->hvdcp_hw_inov_dis_votable, OV_VOTER, true,
+                               0);
+                       pval.intval = POWER_SUPPLY_DP_DM_FORCE_5V;
+                       rc = power_supply_set_property(chg->batt_psy,
+                               POWER_SUPPLY_PROP_DP_DM, &pval);
+                       return;
+               }
+       }
+}
+
 #define QC3_PULSES_FOR_6V      5
 #define QC3_PULSES_FOR_9V      20
 #define QC3_PULSES_FOR_12V     35
@@ -3462,6 +3490,7 @@ static void smblib_hvdcp_adaptive_voltage_change(struct smb_charger *chg)
        u8 stat;
        int pulses;
 
+       smblib_check_ov_condition(chg);
        power_supply_changed(chg->usb_main_psy);
        if (chg->real_charger_type == POWER_SUPPLY_TYPE_USB_HVDCP) {
                rc = smblib_read(chg, QC_CHANGE_STATUS_REG, &stat);
@@ -3994,6 +4023,7 @@ static void smblib_handle_typec_removal(struct smb_charger *chg)
        /* reset hvdcp voters */
        vote(chg->hvdcp_disable_votable_indirect, VBUS_CC_SHORT_VOTER, true, 0);
        vote(chg->hvdcp_disable_votable_indirect, PD_INACTIVE_VOTER, true, 0);
+       vote(chg->hvdcp_hw_inov_dis_votable, OV_VOTER, false, 0);
 
        /* reset power delivery voters */
        vote(chg->pd_allowed_votable, PD_VOTER, false, 0);

diff --git a/drivers/power/supply/qcom/smb-lib.h b/drivers/power/supply/qcom/smb-lib.h
index f292ca0..4b30d8a 100644 (file)
--- a/drivers/power/supply/qcom/smb-lib.h
+++ b/drivers/power/supply/qcom/smb-lib.h
@@ -66,6 +66,7 @@ enum print_reason {
 #define USBIN_I_VOTER                  "USBIN_I_VOTER"
 #define WEAK_CHARGER_VOTER             "WEAK_CHARGER_VOTER"
 #define WBC_VOTER                      "WBC_VOTER"
+#define OV_VOTER                       "OV_VOTER"
 
 #define VCONN_MAX_ATTEMPTS     3
 #define OTG_MAX_ATTEMPTS       3
@@ -84,6 +85,7 @@ enum {
        TYPEC_CC2_REMOVAL_WA_BIT        = BIT(2),
        QC_AUTH_INTERRUPT_WA_BIT        = BIT(3),
        OTG_WA                          = BIT(4),
+       OV_IRQ_WA_BIT                   = BIT(5),
 };
 
 enum smb_irq_index {