linux-kernel - [PATCH v1 2/2] hwmon: ina2xx: add optional regulator support

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Message-Id: <20230308094024.14115-3-clamor95@gmail.com>
Date:   Wed,  8 Mar 2023 11:40:24 +0200
From:   Svyatoslav Ryhel <clamor95@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/2] hwmon: ina2xx: add optional regulator support

Some devices may need a specific supply provided
for this sensor to work properly, like p895 does.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 drivers/hwmon/ina2xx.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
index 00fc70305a89..4a3e2b1bbe8b 100644
--- a/drivers/hwmon/ina2xx.c
+++ b/drivers/hwmon/ina2xx.c
@@ -119,6 +119,7 @@ struct ina2xx_data {
 	long power_lsb_uW;
 	struct mutex config_lock;
 	struct regmap *regmap;
+	struct regulator *vdd_supply;
 
 	const struct attribute_group *groups[INA2XX_MAX_ATTRIBUTE_GROUPS];
 };
@@ -656,6 +657,17 @@ static int ina2xx_probe(struct i2c_client *client)
 		return PTR_ERR(data->regmap);
 	}
 
+	data->vdd_supply = devm_regulator_get_optional(dev, "vdd");
+	if (IS_ERR(data->vdd_supply))
+		return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
+				     "failed to get vdd regulator\n");
+
+	ret = regulator_enable(data->vdd_supply);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable vdd power supply\n");
+		return ret;
+	}
+
 	ret = ina2xx_init(data);
 	if (ret < 0) {
 		dev_err(dev, "error configuring the device: %d\n", ret);
-- 
2.37.2