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charset="utf-8" Current driver assume PWR_AVG and VI_AVG as 1 by default, and user needs to set sample averaging via sysfs manually. This patch parses the properties "adi,power-sample-average" and "adi,volt-curr-sample-average" from device tree, and setting sample averaging during probe. Input value must be one of value in the list [1, 2, 4, 8, 16, 32, 64, 128]. Signed-off-by: Potin Lai --- drivers/hwmon/pmbus/adm1275.c | 40 ++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c index d311e0557401..3b07bfb43e93 100644 --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -475,6 +475,7 @@ static int adm1275_probe(struct i2c_client *client) int vindex =3D -1, voindex =3D -1, cindex =3D -1, pindex =3D -1; int tindex =3D -1; u32 shunt; + u32 avg; =20 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA @@ -687,7 +688,7 @@ static int adm1275_probe(struct i2c_client *client) if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=3D (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) { config |=3D ADM1278_VOUT_EN | ADM1278_TEMP1_EN; - ret =3D i2c_smbus_write_byte_data(client, + ret =3D i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, config); if (ret < 0) { @@ -756,6 +757,43 @@ static int adm1275_probe(struct i2c_client *client) return -ENODEV; } =20 + if (data->have_power_sampling && + of_property_read_u32(client->dev.of_node, + "adi,power-sample-average", &avg) =3D=3D 0) { + if (!avg || avg > ADM1275_SAMPLES_AVG_MAX || + BIT(__fls(avg)) !=3D avg) { + dev_err(&client->dev, + "Invalid number of power samples"); + return -EINVAL; + } + ret =3D adm1275_write_pmon_config(data, client, true, + ilog2(avg)); + if (ret < 0) { + dev_err(&client->dev, + "Setting power sample averaging failed with error %d", + ret); + return ret; + } + } + + if (of_property_read_u32(client->dev.of_node, + "adi,volt-curr-sample-average", &avg) =3D=3D 0) { + if (!avg || avg > ADM1275_SAMPLES_AVG_MAX || + BIT(__fls(avg)) !=3D avg) { + dev_err(&client->dev, + "Invalid number of voltage/current samples"); + return -EINVAL; + } + ret =3D adm1275_write_pmon_config(data, client, false, + ilog2(avg)); + if (ret < 0) { + dev_err(&client->dev, + "Setting voltage and current sample averaging failed with error %d", + ret); + return ret; + } + } + if (voindex < 0) voindex =3D vindex; 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Wed, 2 Mar 2022 07:09:21 +0000 From: Potin Lai To: Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski Cc: Patrick Williams , linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Potin Lai Subject: [PATCH v5 2/2] dt-bindings: hwmon: Add sample averaging properties for ADM1275 Date: Wed, 2 Mar 2022 15:08:31 +0800 Message-Id: <20220302070831.23822-3-potin.lai@quantatw.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220302070831.23822-1-potin.lai@quantatw.com> References: <20220302070831.23822-1-potin.lai@quantatw.com> X-ClientProxiedBy: HK2PR02CA0139.apcprd02.prod.outlook.com (2603:1096:202:16::23) To HK0PR04MB3282.apcprd04.prod.outlook.com (2603:1096:203:89::17) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: a37c84f4-44ee-4a2a-b210-08d9fc1b92f0 X-MS-TrafficTypeDiagnostic: PSAPR04MB4488:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="utf-8" Add documentation of new properties for sample averaging in PMON_CONFIG register. New properties: - adi,volt-curr-sample-average - adi,power-sample-average Signed-off-by: Potin Lai --- .../bindings/hwmon/adi,adm1275.yaml | 69 +++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml b/Doc= umentation/devicetree/bindings/hwmon/adi,adm1275.yaml index 223393d7cafd..b191abddf20b 100644 --- a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml +++ b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml @@ -37,6 +37,72 @@ properties: description: Shunt resistor value in micro-Ohm. =20 + adi,volt-curr-sample-average: + description: | + Number of samples to be used to report voltage and current values. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 2, 4, 8, 16, 32, 64, 128] + + adi,power-sample-average: + description: | + Number of samples to be used to report power values. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 2, 4, 8, 16, 32, 64, 128] + +allOf: + - if: + properties: + compatible: + contains: + enum: + - adi,adm1075 + - adi,adm1276 + then: + properties: + adi,volt-curr-sample-average: + default: 128 + adi,power-sample-average-enable: false + + - if: + properties: + compatible: + contains: + enum: + - adi,adm1275 + then: + properties: + adi,volt-curr-sample-average: + default: 16 + adi,power-sample-average-enable: false + + - if: + properties: + compatible: + contains: + enum: + - adi,adm1272 + then: + properties: + adi,volt-curr-sample-average: + default: 128 + adi,power-sample-average-enable: + default: 128 + + - if: + properties: + compatible: + contains: + enum: + - adi,adm1278 + - adi,adm1293 + - adi,adm1294 + then: + properties: + adi,volt-curr-sample-average: + default: 128 + adi,power-sample-average-enable: + default: 1 + required: - compatible - reg @@ -53,5 +119,8 @@ examples: compatible =3D "adi,adm1272"; reg =3D <0x10>; shunt-resistor-micro-ohms =3D <500>; + adi,volt-curr-sample-average =3D <128>; + adi,power-sample-average =3D <128>; + adi,power-sample-average-enable; }; }; --=20 2.17.1