linux-kernel - [PATCH 2/2] power: supply: ucs1002: Add HWMON interface

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Date:   Wed, 29 May 2019 00:11:12 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-pm@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Guenter Roeck <linux@...ck-us.net>,
        Sebastian Reichel <sre@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] power: supply: ucs1002: Add HWMON interface

Expose current sensors found on UCS1002 via HWMON.

Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Fabio Estevam <fabio.estevam@....com>
Cc: Guenter Roeck <linux@...ck-us.net>
Cc: Sebastian Reichel <sre@...nel.org>
Cc: linux-kernel@...r.kernel.org
Cc: linux-pm@...r.kernel.org
---
 drivers/power/supply/ucs1002_power.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/ucs1002_power.c b/drivers/power/supply/ucs1002_power.c
index 1c89d030c045..1faf2ef7d3f0 100644
--- a/drivers/power/supply/ucs1002_power.c
+++ b/drivers/power/supply/ucs1002_power.c
@@ -491,7 +491,7 @@ static const struct regulator_desc ucs1002_regulator_descriptor = {
 static int ucs1002_probe(struct i2c_client *client,
 			 const struct i2c_device_id *dev_id)
 {
-	struct device *dev = &client->dev;
+	struct device *hwmon, *dev = &client->dev;
 	struct power_supply_config charger_config = {};
 	const struct regmap_config regmap_config = {
 		.reg_bits = 8,
@@ -571,6 +571,13 @@ static int ucs1002_probe(struct i2c_client *client,
 		return ret;
 	}
 
+	hwmon = devm_power_supply_add_hwmon_sysfs(info->charger);
+	ret = PTR_ERR_OR_ZERO(hwmon);
+	if (ret) {
+		dev_err(dev, "Failed to add hmwon attributes: %d\n", ret);
+		return ret;
+	}
+
 	ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, &regval);
 	if (ret) {
 		dev_err(dev, "Failed to read pin status: %d\n", ret);
-- 
2.21.0