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[1.34.21.66]) by smtp.gmail.com with ESMTPSA id iw14-20020a170903044e00b001c5076ae6absm4155925plb.126.2023.11.13.07.52.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Nov 2023 07:52:21 -0800 (PST) From: Peter Yin To: patrick@stwcx.xyz, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jean Delvare , Guenter Roeck , Jonathan Corbet , Joel Stanley , Chanh Nguyen , Peter Yin , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 2/2] hwmon: (pmbus) Add support for MPS Multi-phase mp5990 Date: Mon, 13 Nov 2023 23:50:08 +0800 Message-Id: <20231113155008.2147090-3-peteryin.openbmc@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231113155008.2147090-1-peteryin.openbmc@gmail.com> References: <20231113155008.2147090-1-peteryin.openbmc@gmail.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add support for mp5990 device from Monolithic Power Systems, Inc. (MPS) vendor. This is a Hot-Swap Controller. Signed-off-by: Peter Yin --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/mp5990.rst | 84 ++++++++++++++++ drivers/hwmon/pmbus/Kconfig | 9 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/mp5990.c | 177 +++++++++++++++++++++++++++++++++ 5 files changed, 272 insertions(+) create mode 100644 Documentation/hwmon/mp5990.rst create mode 100644 drivers/hwmon/pmbus/mp5990.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 042e1cf9501b..8c70e10fc795 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -157,6 +157,7 @@ Hardware Monitoring Kernel Drivers mp2888 mp2975 mp5023 + mp5990 nct6683 nct6775 nct7802 diff --git a/Documentation/hwmon/mp5990.rst b/Documentation/hwmon/mp5990.rst new file mode 100644 index 000000000000..6f2f0c099d44 --- /dev/null +++ b/Documentation/hwmon/mp5990.rst @@ -0,0 +1,84 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver mp5990 +==================== + +Supported chips: + + * MPS MP5990 + + Prefix: 'mp5990' + + * Datasheet + + Publicly available at the MPS website : https://www.monolithicpower.com/en/mp5990.html + +Author: + + Peter Yin + +Description +----------- + +This driver implements support for Monolithic Power Systems, Inc. (MPS) +MP5990 Hot-Swap Controller. + +Device compliant with: + +- PMBus rev 1.3 interface. + +Device supports direct and linear format for reading input voltage, +output voltage, output current, input power and temperature. + +The driver exports the following attributes via the 'sysfs' files +for input voltage: + +**in1_input** + +**in1_label** + +**in1_max** + +**in1_max_alarm** + +**in1_min** + +**in1_min_alarm** + +The driver provides the following attributes for output voltage: + +**in2_input** + +**in2_label** + +**in2_alarm** + +The driver provides the following attributes for output current: + +**curr1_input** + +**curr1_label** + +**curr1_alarm** + +**curr1_max** + +The driver provides the following attributes for input power: + +**power1_input** + +**power1_label** + +**power1_alarm** + +The driver provides the following attributes for temperature: + +**temp1_input** + +**temp1_max** + +**temp1_max_alarm** + +**temp1_crit** + +**temp1_crit_alarm** diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 270b6336b76d..65a116f7744d 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -326,6 +326,15 @@ config SENSORS_MP5023 This driver can also be built as a module. If so, the module will be called mp5023. +config SENSORS_MP5990 + tristate "MPS MP5990" + help + If you say yes here you get hardware monitoring support for MPS + MP5990. + + This driver can also be built as a module. If so, the module will + be called mp5990. + config SENSORS_MPQ7932_REGULATOR bool "Regulator support for MPQ7932" depends on SENSORS_MPQ7932 && REGULATOR diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 84ee960a6c2d..212d9ca0acc9 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -35,6 +35,7 @@ obj-$(CONFIG_SENSORS_MAX8688) += max8688.o obj-$(CONFIG_SENSORS_MP2888) += mp2888.o obj-$(CONFIG_SENSORS_MP2975) += mp2975.o obj-$(CONFIG_SENSORS_MP5023) += mp5023.o +obj-$(CONFIG_SENSORS_MP5990) += mp5990.o obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o diff --git a/drivers/hwmon/pmbus/mp5990.c b/drivers/hwmon/pmbus/mp5990.c new file mode 100644 index 000000000000..2d721b6acfb8 --- /dev/null +++ b/drivers/hwmon/pmbus/mp5990.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for MPS MP5990 Hot-Swap Controller + */ + +#include +#include +#include +#include "pmbus.h" + +#define MP5990_EFUSE_CFG (0xC4) +#define MP5990_VOUT_FORMAT BIT(9) + +struct mp5990_data { + struct pmbus_driver_info info; + u8 vout_mode; + u8 vout_linear_exponent; +}; + +#define to_mp5990_data(x) container_of(x, struct mp5990_data, info) + +static int mp5990_read_byte_data(struct i2c_client *client, int page, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct mp5990_data *data = to_mp5990_data(info); + + switch (reg) { + case PMBUS_VOUT_MODE: + if (data->vout_mode == linear) { + /* + * The VOUT format is linear11, not linear16. + * We should enforce the VOUT in linear mode and + * return exponent value. + */ + return data->vout_linear_exponent; + } + + /* + * The datasheet does not support the VOUT command, + * but the device responds with a default value of 0x17. + * In the standard, 0x17 represents linear mode. However, + * Therefore, we should enforce the VOUT in the direct format + * when format use default direct mode. + */ + return PB_VOUT_MODE_DIRECT; + + default: + return -ENODATA; + } +} + +static int mp5990_read_word_data(struct i2c_client *client, int page, + int phase, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct mp5990_data *data = to_mp5990_data(info); + int ret; + s32 mantissa; + + switch (reg) { + case PMBUS_READ_VOUT: + ret = pmbus_read_word_data(client, page, phase, reg); + if (ret < 0) + return ret; + /* + * Because the VOUT mode is linear11 and not linear16, + * we disregard bits[15:11] and report based on the VOUT mode. + */ + if (data->vout_mode == linear) { + mantissa = ((s16)((ret & 0x7ff) << 5)) >> 5; + ret = mantissa; + } + break; + default: + return -ENODATA; + } + + return ret; +} + +static struct pmbus_driver_info mp5990_info = { + .pages = 1, + .format[PSC_VOLTAGE_IN] = direct, + .format[PSC_VOLTAGE_OUT] = direct, + .format[PSC_CURRENT_OUT] = direct, + .format[PSC_POWER] = direct, + .format[PSC_TEMPERATURE] = direct, + .m[PSC_VOLTAGE_IN] = 32, + .b[PSC_VOLTAGE_IN] = 0, + .R[PSC_VOLTAGE_IN] = 0, + .m[PSC_VOLTAGE_OUT] = 32, + .b[PSC_VOLTAGE_OUT] = 0, + .R[PSC_VOLTAGE_OUT] = 0, + .m[PSC_CURRENT_OUT] = 16, + .b[PSC_CURRENT_OUT] = 0, + .R[PSC_CURRENT_OUT] = 0, + .m[PSC_POWER] = 1, + .b[PSC_POWER] = 0, + .R[PSC_POWER] = 0, + .m[PSC_TEMPERATURE] = 1, + .b[PSC_TEMPERATURE] = 0, + .R[PSC_TEMPERATURE] = 0, + .func[0] = + PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_PIN | + PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT | + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP, + .read_byte_data = mp5990_read_byte_data, + .read_word_data = mp5990_read_word_data, +}; + +static int mp5990_probe(struct i2c_client *client) +{ + struct pmbus_driver_info *info; + struct mp5990_data *data; + int ret; + + data = devm_kzalloc(&client->dev, sizeof(struct mp5990_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + memcpy(&data->info, &mp5990_info, sizeof(*info)); + info = &data->info; + + /* Read Vout Config */ + ret = i2c_smbus_read_word_data(client, MP5990_EFUSE_CFG); + if (ret < 0) { + dev_err(&client->dev, "Can't get vout mode."); + return ret; + } + + /* + * EFUSE_CFG (0xC4) bit9=1 is linear mode, bit=0 is direct mode. + */ + if (ret & MP5990_VOUT_FORMAT) { + data->vout_mode = linear; + data->info.format[PSC_VOLTAGE_IN] = linear; + data->info.format[PSC_VOLTAGE_OUT] = linear; + data->info.format[PSC_CURRENT_OUT] = linear; + data->info.format[PSC_POWER] = linear; + ret = i2c_smbus_read_word_data(client, PMBUS_READ_VOUT); + if (ret < 0) { + dev_err(&client->dev, "Can't get vout exponent."); + return ret; + } + data->vout_linear_exponent = (u8)((ret >> 11) & 0x1f); + } else { + data->vout_mode = direct; + } + return pmbus_do_probe(client, info); +} + +static const struct of_device_id mp5990_of_match[] = { + { .compatible = "mps,mp5990" }, + {} +}; + +static const struct i2c_device_id mp5990_id[] = { + {"mp5990", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, mp5990_id); + +static struct i2c_driver mp5990_driver = { + .driver = { + .name = "mp5990", + .of_match_table = mp5990_of_match, + }, + .probe = mp5990_probe, + .id_table = mp5990_id, +}; +module_i2c_driver(mp5990_driver); + +MODULE_AUTHOR("Peter Yin "); +MODULE_DESCRIPTION("PMBus driver for MP5990 HSC"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS);