linux-kernel - [PATCH v5 6/8] power: ip5xxx_power: Fall back to Charge End bit if status register is absent

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Message-ID: <20241119180741.2237692-6-csokas.bence@prolan.hu>
Date: Tue, 19 Nov 2024 19:07:38 +0100
From: Csókás, Bence <csokas.bence@...lan.hu>
To: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Csókás, Bence <csokas.bence@...lan.hu>, "Samuel
 Holland" <samuel@...lland.org>, Sebastian Reichel <sre@...nel.org>
Subject: [PATCH v5 6/8] power: ip5xxx_power: Fall back to Charge End bit if status register is absent

On parts where there is no status register, check the Charge End
bit to set charging/not charging status. Fullness, trickle charge
status, discharging etc. cannot be determined from just this bit.

Signed-off-by: Csókás, Bence <csokas.bence@...lan.hu>
---

Notes:
    New in v5

 drivers/power/supply/ip5xxx_power.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/power/supply/ip5xxx_power.c b/drivers/power/supply/ip5xxx_power.c
index f47198731a0c..46b84fb696d7 100644
--- a/drivers/power/supply/ip5xxx_power.c
+++ b/drivers/power/supply/ip5xxx_power.c
@@ -271,6 +271,19 @@ static int ip5xxx_battery_get_status(struct ip5xxx *ip5xxx, int *val)
 	unsigned int rval;
 	int ret;
 
+	if (!ip5xxx->regs.charger.status) {
+		// Fall-back to Charging Ended bit
+		ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.chg_end, &rval);
+		if (ret)
+			return ret;
+
+		if (rval == ip5xxx->chg_end_inverted)
+			*val = POWER_SUPPLY_STATUS_CHARGING;
+		else
+			*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		return 0;
+	}
+
 	ret = ip5xxx_read(ip5xxx, ip5xxx->regs.charger.status, &rval);
 	if (ret)
 		return ret;
-- 
2.34.1