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Fri, 24 May 2019 12:49:13 +0000 From: "Adamski, Krzysztof (Nokia - PL/Wroclaw)" To: Guenter Roeck , Jean Delvare CC: "linux-hwmon@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "Sverdlin, Alexander (Nokia - DE/Ulm)" Subject: [PATCH] adm1275: support PMBUS_VIRT_*_SAMPLES Thread-Topic: [PATCH] adm1275: support PMBUS_VIRT_*_SAMPLES Thread-Index: AQHVEi8WZbhhz1TyCEmlx6WeByshdA== Date: Fri, 24 May 2019 12:49:13 +0000 Message-ID: <20190524124841.GA25728@localhost.localdomain> Accept-Language: pl-PL, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HE1PR05CA0386.eurprd05.prod.outlook.com (2603:10a6:7:94::45) To HE1PR07MB3337.eurprd07.prod.outlook.com (2603:10a6:7:2d::12) authentication-results: spf=none (sender IP is ) smtp.mailfrom=krzysztof.adamski@nokia.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [131.228.32.161] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: eef1b52c-1ff8-4707-a999-08d6e0463925 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4618075)(2017052603328)(7193020);SRVR:HE1PR07MB3065; 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charset="us-ascii" Content-ID: <611976EE7C5C6F4F8DA16AE6543EFBB1@eurprd07.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nokia.com X-MS-Exchange-CrossTenant-Network-Message-Id: eef1b52c-1ff8-4707-a999-08d6e0463925 X-MS-Exchange-CrossTenant-originalarrivaltime: 24 May 2019 12:49:13.3804 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5d471751-9675-428d-917b-70f44f9630b0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: krzysztof.adamski@nokia.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR07MB3065 Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org The device supports setting the number of samples for averaging the measurements. There are two separate settings - PWR_AVG for averaging PIN and VI_AVG for averaging VIN/VAUX/IOUT, both being part of PMON_CONFIG register. The values are stored as exponent of base 2 of the actual number of samples that will be taken. Signed-off-by: Krzysztof Adamski --- drivers/hwmon/pmbus/adm1275.c | 68 ++++++++++++++++++++++++++++++++++- 1 file changed, 67 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c index f569372c9204..4efe1a9df563 100644 --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -23,6 +23,8 @@ #include #include #include +#include +#include #include "pmbus.h" =20 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294= }; @@ -78,6 +80,10 @@ enum chips { adm1075, adm1272, adm1275, adm1276, adm1278= , adm1293, adm1294 }; #define ADM1075_VAUX_OV_WARN BIT(7) #define ADM1075_VAUX_UV_WARN BIT(6) =20 +#define ADM1275_PWR_AVG_MASK GENMASK(13, 11) +#define ADM1275_VI_AVG_MASK GENMASK(10, 8) +#define ADM1275_SAMPLES_AVG_MAX 128 + struct adm1275_data { int id; bool have_oc_fault; @@ -90,6 +96,7 @@ struct adm1275_data { bool have_pin_max; bool have_temp_max; struct pmbus_driver_info info; + struct mutex lock; }; =20 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info) @@ -164,6 +171,38 @@ static const struct coefficients adm1293_coefficients[= ] =3D { [18] =3D { 7658, 0, -3 }, /* power, 21V, irange200 */ }; =20 +static inline int adm1275_read_pmon_config(struct i2c_client *client, u64 = mask) +{ + int ret; + + ret =3D i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); + if (ret < 0) + return ret; + + return FIELD_GET(mask, ret); +} + +static inline int adm1275_write_pmon_config(struct i2c_client *client, u64= mask, + u16 word) +{ + const struct pmbus_driver_info *info =3D pmbus_get_driver_info(client); + struct adm1275_data *data =3D to_adm1275_data(info); + int ret; + + mutex_lock(&data->lock); + ret =3D i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); + if (ret < 0) { + mutex_unlock(&data->lock); + return ret; + } + + word =3D FIELD_PREP(mask, word) | (ret & ~mask); + ret =3D i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, word); + mutex_unlock(&data->lock); + + return ret; +} + static int adm1275_read_word_data(struct i2c_client *client, int page, int= reg) { const struct pmbus_driver_info *info =3D pmbus_get_driver_info(client); @@ -242,6 +281,19 @@ static int adm1275_read_word_data(struct i2c_client *c= lient, int page, int reg) if (!data->have_temp_max) return -ENXIO; break; + case PMBUS_VIRT_POWER_SAMPLES: + ret =3D adm1275_read_pmon_config(client, ADM1275_PWR_AVG_MASK); + if (ret < 0) + break; + ret =3D 1 << ret; + break; + case PMBUS_VIRT_IN_SAMPLES: + case PMBUS_VIRT_CURR_SAMPLES: + ret =3D adm1275_read_pmon_config(client, ADM1275_VI_AVG_MASK); + if (ret < 0) + break; + ret =3D 1 << ret; + break; default: ret =3D -ENODATA; break; @@ -286,6 +338,17 @@ static int adm1275_write_word_data(struct i2c_client *= client, int page, int reg, case PMBUS_VIRT_RESET_TEMP_HISTORY: ret =3D pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); break; + case PMBUS_VIRT_POWER_SAMPLES: + word =3D clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); + ret =3D adm1275_write_pmon_config(client, ADM1275_PWR_AVG_MASK, + ilog2(word)); + break; + case PMBUS_VIRT_IN_SAMPLES: + case PMBUS_VIRT_CURR_SAMPLES: + word =3D clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); + ret =3D adm1275_write_pmon_config(client, ADM1275_VI_AVG_MASK, + ilog2(word)); + break; default: ret =3D -ENODATA; break; @@ -422,6 +485,8 @@ static int adm1275_probe(struct i2c_client *client, if (!data) return -ENOMEM; =20 + mutex_init(&data->lock); + if (of_property_read_u32(client->dev.of_node, "shunt-resistor-micro-ohms", &shunt)) shunt =3D 1000; /* 1 mOhm if not set via DT */ @@ -439,7 +504,8 @@ static int adm1275_probe(struct i2c_client *client, info->format[PSC_CURRENT_OUT] =3D direct; info->format[PSC_POWER] =3D direct; info->format[PSC_TEMPERATURE] =3D direct; - info->func[0] =3D PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; + info->func[0] =3D PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_SAMPLES; =20 info->read_word_data =3D adm1275_read_word_data; info->read_byte_data =3D adm1275_read_byte_data; --=20 2.20.1