feat(bat): add pmu_vol_min protect

huangcm

2025-07-16 ef9638196126781a6ba6d6a8d47504b4f326f916

feat(bat): add pmu_vol_min protect

 longan/kernel/linux-4.9/drivers/power/supply/axp803_battery.c
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@@ -143,6 +143,9 @@
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 	struct axp_config_info *axp_config = &bat_power->dts_info;
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+    regmap_bulk_read(bat_power->regmap, AXP803_OCVBATH_RES, temp_val, 2);
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+	ocv_vol = ((temp_val[0] << 4) | (temp_val[1] & 0xF)) * 1100 / 1000;
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+
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 	ret = regmap_read(bat_power->regmap, AXP803_CAP, &reg_value);
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 	if (ret)
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 		return ret;
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@@ -160,6 +163,11 @@
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 			rest_vol = 100;
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 		}
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+        if (ocv_vol < axp_config->pmu_vol_min) {
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+            pr_err("kickpi: ocv_vol %d < min %d, rest_vol %d -> 0\n", ocv_vol, axp_config->pmu_vol_min, rest_vol);
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+            rest_vol = 0;
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+        }
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+            
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 		return rest_vol;
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 	}
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@@ -234,6 +242,11 @@
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 		pr_debug("calc_info: ocv_vol:%d rdc:%d coulumb_counter:%d batt_max_cap:%d\n",
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 			ocv_vol, rdc, coulumb_counter, batt_max_cap);
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 	}
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+
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+    if (ocv_vol < axp_config->pmu_vol_min) {
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+        pr_err("kickpi: ocv_vol %d < min %d, rest_vol %d -> 0\n", ocv_vol, axp_config->pmu_vol_min, rest_vol);
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+        rest_vol = 0;
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+    }
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 	return rest_vol;
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 }
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@@ -917,6 +930,7 @@
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 	AXP_OF_PROP_READ(pmu_runtime_chgcur, INTCHGCUR / 1000);
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 	AXP_OF_PROP_READ(pmu_suspend_chgcur,             1200);
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 	AXP_OF_PROP_READ(pmu_shutdown_chgcur,            1200);
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+    AXP_OF_PROP_READ(pmu_vol_min,                    3400);
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 	AXP_OF_PROP_READ(pmu_init_chgvol,    INTCHGVOL / 1000);
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 	AXP_OF_PROP_READ(pmu_init_chgend_rate,  INTCHGENDRATE);
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 	AXP_OF_PROP_READ(pmu_init_chg_enabled,              1);
 longan/kernel/linux-4.9/drivers/power/supply/axp803_charger.h
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@@ -44,6 +44,7 @@
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 	u32 pmu_runtime_chgcur;
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 	u32 pmu_suspend_chgcur;
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 	u32 pmu_shutdown_chgcur;
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+    u32 pmu_vol_min;
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 	u32 pmu_init_chgvol;
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 	u32 pmu_init_chgend_rate;
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 	u32 pmu_init_chg_enabled;