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From:   Dmitry Osipenko <digetx@gmail.com>
To:     Thierry Reding <treding@nvidia.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Sebastian Reichel <sre@kernel.org>,
        Peter Chen <peter.chen@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Felipe Balbi <balbi@kernel.org>,
        David Heidelberg <david@ixit.cz>
Cc:     devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-tegra@vger.kernel.org
Subject: [PATCH v5 08/12] power: supply: smb347-charger: Utilize generic regmap caching
Date:   Sat, 17 Jul 2021 21:21:30 +0300
Message-Id: <20210717182134.30262-9-digetx@gmail.com>
In-Reply-To: <20210717182134.30262-1-digetx@gmail.com>
References: <20210717182134.30262-1-digetx@gmail.com>
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Utilize generic regmap caching in order to avoid unnecessary slow I2C
accesses each time the supply status updated and remove local caching
of charger state to make code cleaner.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/power/supply/smb347-charger.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c
index db1378b41f80..0f4d458e294f 100644
--- a/drivers/power/supply/smb347-charger.c
+++ b/drivers/power/supply/smb347-charger.c
@@ -135,7 +135,6 @@
  * @id: SMB charger ID
  * @mains_online: is AC/DC input connected
  * @usb_online: is USB input connected
- * @charging_enabled: is charging enabled
  * @irq_unsupported: is interrupt unsupported by SMB hardware
  * @max_charge_current: maximum current (in uA) the battery can be charged
  * @max_charge_voltage: maximum voltage (in uV) the battery can be charged
@@ -192,7 +191,6 @@ struct smb347_charger {
 	unsigned int		id;
 	bool			mains_online;
 	bool			usb_online;
-	bool			charging_enabled;
 	bool			irq_unsupported;
 
 	unsigned int		max_charge_current;
@@ -358,21 +356,13 @@ static int smb347_charging_status(struct smb347_charger *smb)
 
 static int smb347_charging_set(struct smb347_charger *smb, bool enable)
 {
-	int ret = 0;
-
 	if (smb->enable_control != SMB3XX_CHG_ENABLE_SW) {
 		dev_dbg(smb->dev, "charging enable/disable in SW disabled\n");
 		return 0;
 	}
 
-	if (smb->charging_enabled != enable) {
-		ret = regmap_update_bits(smb->regmap, CMD_A, CMD_A_CHG_ENABLED,
-					 enable ? CMD_A_CHG_ENABLED : 0);
-		if (!ret)
-			smb->charging_enabled = enable;
-	}
-
-	return ret;
+	return regmap_update_bits(smb->regmap, CMD_A, CMD_A_CHG_ENABLED,
+				  enable ? CMD_A_CHG_ENABLED : 0);
 }
 
 static inline int smb347_charging_enable(struct smb347_charger *smb)
@@ -1310,6 +1300,7 @@ static const struct regmap_config smb347_regmap = {
 	.max_register	= SMB347_MAX_REGISTER,
 	.volatile_reg	= smb347_volatile_reg,
 	.readable_reg	= smb347_readable_reg,
+	.cache_type	= REGCACHE_FLAT,
 };
 
 static const struct power_supply_desc smb347_mains_desc = {
-- 
2.32.0