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hwmon: Add MP2925 and MP2929 driver
Add support for MPS VR mp2925 and mp2929 controller. This driver exposes telemetry and limit value readings and writtings. Signed-off-by: Wensheng Wang <wenswang@yeah.net> Link: https://lore.kernel.org/r/20250928092845.1394718-2-wenswang@yeah.net Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Wensheng Wang
Guenter Roeck
parent
933b9bc8bb
commit
a79472e30b
6 changed files with 485 additions and 0 deletions
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@ -177,6 +177,7 @@ Hardware Monitoring Kernel Drivers
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mp2869
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mp2888
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mp2891
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mp2925
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mp29502
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mp2975
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mp2993
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151
Documentation/hwmon/mp2925.rst
Normal file
151
Documentation/hwmon/mp2925.rst
Normal file
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@ -0,0 +1,151 @@
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver mp2925
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====================
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Supported chips:
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* MPS mp2925
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Prefix: 'mp2925'
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* MPS mp2929
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Prefix: 'mp2929'
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Author:
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Wensheng Wang <wenswang@yeah.net>
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Description
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-----------
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This driver implements support for Monolithic Power Systems, Inc. (MPS)
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MP2925 Dual Loop Digital Multi-phase Controller.
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Device compliant with:
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- PMBus rev 1.3 interface.
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The driver exports the following attributes via the 'sysfs' files
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for input voltage:
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**in1_input**
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**in1_label**
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**in1_crit**
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**in1_crit_alarm**
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**in1_lcrit**
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**in1_lcrit_alarm**
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**in1_max**
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**in1_max_alarm**
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**in1_min**
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**in1_min_alarm**
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The driver provides the following attributes for output voltage:
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**in2_input**
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**in2_label**
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**in2_crit**
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**in2_crit_alarm**
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**in2_lcrit**
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**in2_lcrit_alarm**
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**in3_input**
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**in3_label**
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**in3_crit**
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**in3_crit_alarm**
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**in3_lcrit**
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**in3_lcrit_alarm**
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The driver provides the following attributes for input current:
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**curr1_input**
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**curr1_label**
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The driver provides the following attributes for output current:
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**curr2_input**
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**curr2_label**
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**curr2_crit**
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**curr2_crit_alarm**
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**curr2_max**
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**curr2_max_alarm**
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**curr3_input**
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**curr3_label**
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**curr3_crit**
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**curr3_crit_alarm**
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**curr3_max**
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**curr3_max_alarm**
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The driver provides the following attributes for input power:
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**power1_input**
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**power1_label**
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**power2_input**
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**power2_label**
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The driver provides the following attributes for output power:
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**power3_input**
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**power3_label**
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**power4_input**
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**power4_label**
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The driver provides the following attributes for temperature:
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**temp1_input**
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**temp1_crit**
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**temp1_crit_alarm**
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**temp1_max**
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**temp1_max_alarm**
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**temp2_input**
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**temp2_crit**
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**temp2_crit_alarm**
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**temp2_max**
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**temp2_max_alarm**
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@ -17462,6 +17462,13 @@ S: Maintained
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F: Documentation/hwmon/mp2891.rst
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F: drivers/hwmon/pmbus/mp2891.c
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MPS MP2925 DRIVER
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M: Noah Wang <wenswang@yeah.net>
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L: linux-hwmon@vger.kernel.org
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S: Maintained
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F: Documentation/hwmon/mp2925.rst
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F: drivers/hwmon/pmbus/mp2925.c
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MPS MP29502 DRIVER
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M: Wensheng Wang <wenswang@yeah.net>
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L: linux-hwmon@vger.kernel.org
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@ -401,6 +401,15 @@ config SENSORS_MP2891
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This driver can also be built as a module. If so, the module will
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be called mp2891.
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config SENSORS_MP2925
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tristate "MPS MP2925"
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help
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If you say yes here you get hardware monitoring support for MPS
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MP2925 Dual Loop Digital Multi-Phase Controller.
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This driver can also be built as a module. If so, the module will
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be called mp2925.
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config SENSORS_MP29502
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tristate "MPS MP29502"
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help
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@ -40,6 +40,7 @@ obj-$(CONFIG_SENSORS_MP2856) += mp2856.o
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obj-$(CONFIG_SENSORS_MP2869) += mp2869.o
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obj-$(CONFIG_SENSORS_MP2888) += mp2888.o
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obj-$(CONFIG_SENSORS_MP2891) += mp2891.o
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obj-$(CONFIG_SENSORS_MP2925) += mp2925.o
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obj-$(CONFIG_SENSORS_MP29502) += mp29502.o
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obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
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obj-$(CONFIG_SENSORS_MP2993) += mp2993.o
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316
drivers/hwmon/pmbus/mp2925.c
Normal file
316
drivers/hwmon/pmbus/mp2925.c
Normal file
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@ -0,0 +1,316 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2925)
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*/
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#include <linux/bitfield.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include "pmbus.h"
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/*
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* Vender specific register MFR_VR_MULTI_CONFIG(0x08).
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* This register is used to obtain vid scale.
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*/
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#define MFR_VR_MULTI_CONFIG 0x08
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#define MP2925_VOUT_DIV 512
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#define MP2925_VOUT_OVUV_UINT 195
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#define MP2925_VOUT_OVUV_DIV 100
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#define MP2925_PAGE_NUM 2
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#define MP2925_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_PIN | \
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PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \
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PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | \
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PMBUS_HAVE_STATUS_VOUT | \
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PMBUS_HAVE_STATUS_IOUT | \
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PMBUS_HAVE_STATUS_TEMP | \
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PMBUS_HAVE_STATUS_INPUT)
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#define MP2925_RAIL2_FUNC (PMBUS_HAVE_PIN | PMBUS_HAVE_VOUT | \
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PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \
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PMBUS_HAVE_TEMP | PMBUS_HAVE_IIN | \
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PMBUS_HAVE_STATUS_VOUT | \
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PMBUS_HAVE_STATUS_IOUT | \
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PMBUS_HAVE_STATUS_TEMP | \
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PMBUS_HAVE_STATUS_INPUT)
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struct mp2925_data {
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struct pmbus_driver_info info;
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int vout_scale[MP2925_PAGE_NUM];
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};
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#define to_mp2925_data(x) container_of(x, struct mp2925_data, info)
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static u16 mp2925_linear_exp_transfer(u16 word, u16 expect_exponent)
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{
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s16 exponent, mantissa, target_exponent;
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exponent = ((s16)word) >> 11;
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mantissa = ((s16)((word & 0x7ff) << 5)) >> 5;
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target_exponent = (s16)((expect_exponent & 0x1f) << 11) >> 11;
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if (exponent > target_exponent)
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mantissa = mantissa << (exponent - target_exponent);
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else
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mantissa = mantissa >> (target_exponent - exponent);
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return (mantissa & 0x7ff) | ((expect_exponent << 11) & 0xf800);
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}
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static int mp2925_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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int ret;
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switch (reg) {
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case PMBUS_VOUT_MODE:
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/*
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* The MP2925 does not follow standard PMBus protocol completely,
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* and the calculation of vout in this driver is based on direct
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* format. As a result, the format of vout is enforced to direct.
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*/
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ret = PB_VOUT_MODE_DIRECT;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int mp2925_read_word_data(struct i2c_client *client, int page, int phase,
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int reg)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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struct mp2925_data *data = to_mp2925_data(info);
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int ret;
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switch (reg) {
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case PMBUS_READ_VOUT:
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ret = pmbus_read_word_data(client, page, phase, reg);
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if (ret < 0)
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return ret;
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ret = DIV_ROUND_CLOSEST((ret & GENMASK(11, 0)) * data->vout_scale[page],
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MP2925_VOUT_DIV);
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break;
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case PMBUS_VOUT_OV_FAULT_LIMIT:
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case PMBUS_VOUT_UV_FAULT_LIMIT:
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ret = pmbus_read_word_data(client, page, phase, reg);
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if (ret < 0)
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return ret;
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ret = DIV_ROUND_CLOSEST((ret & GENMASK(11, 0)) * MP2925_VOUT_OVUV_UINT,
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MP2925_VOUT_OVUV_DIV);
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break;
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case PMBUS_STATUS_WORD:
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case PMBUS_READ_VIN:
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case PMBUS_READ_IOUT:
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case PMBUS_READ_POUT:
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case PMBUS_READ_PIN:
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case PMBUS_READ_IIN:
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case PMBUS_READ_TEMPERATURE_1:
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case PMBUS_VIN_OV_FAULT_LIMIT:
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case PMBUS_VIN_OV_WARN_LIMIT:
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case PMBUS_VIN_UV_WARN_LIMIT:
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case PMBUS_VIN_UV_FAULT_LIMIT:
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case PMBUS_IOUT_OC_FAULT_LIMIT:
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case PMBUS_IOUT_OC_WARN_LIMIT:
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case PMBUS_OT_FAULT_LIMIT:
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case PMBUS_OT_WARN_LIMIT:
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ret = -ENODATA;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int mp2925_write_word_data(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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int ret;
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switch (reg) {
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case PMBUS_VIN_OV_FAULT_LIMIT:
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case PMBUS_VIN_OV_WARN_LIMIT:
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case PMBUS_VIN_UV_WARN_LIMIT:
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case PMBUS_VIN_UV_FAULT_LIMIT:
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/*
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* The PMBUS_VIN_OV_FAULT_LIMIT, PMBUS_VIN_OV_WARN_LIMIT,
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* PMBUS_VIN_UV_WARN_LIMIT and PMBUS_VIN_UV_FAULT_LIMIT
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* of MP2925 is linear11 format, and the exponent is a
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* constant value(5'b11100)， so the exponent of word
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* parameter should be converted to 5'b11100(0x1C).
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*/
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ret = pmbus_write_word_data(client, page, reg,
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mp2925_linear_exp_transfer(word, 0x1C));
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break;
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case PMBUS_VOUT_OV_FAULT_LIMIT:
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case PMBUS_VOUT_UV_FAULT_LIMIT:
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/*
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* The bit0-bit11 is the limit value, and bit12-bit15
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* should not be changed.
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*/
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ret = pmbus_read_word_data(client, page, 0xff, reg);
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if (ret < 0)
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return ret;
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ret = pmbus_write_word_data(client, page, reg,
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(ret & ~GENMASK(11, 0)) |
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FIELD_PREP(GENMASK(11, 0),
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DIV_ROUND_CLOSEST(word * MP2925_VOUT_OVUV_DIV,
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MP2925_VOUT_OVUV_UINT)));
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break;
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case PMBUS_OT_FAULT_LIMIT:
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case PMBUS_OT_WARN_LIMIT:
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/*
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* The PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT of
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* MP2925 is linear11 format, and the exponent is a
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* constant value(5'b00000), so the exponent of word
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* parameter should be converted to 5'b00000.
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*/
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ret = pmbus_write_word_data(client, page, reg,
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mp2925_linear_exp_transfer(word, 0x00));
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break;
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case PMBUS_IOUT_OC_FAULT_LIMIT:
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case PMBUS_IOUT_OC_WARN_LIMIT:
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/*
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* The PMBUS_IOUT_OC_FAULT_LIMIT and PMBUS_IOUT_OC_WARN_LIMIT
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* of MP2925 is linear11 format, and the exponent can not be
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* changed.
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*/
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ret = pmbus_read_word_data(client, page, 0xff, reg);
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if (ret < 0)
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return ret;
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ret = pmbus_write_word_data(client, page, reg,
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mp2925_linear_exp_transfer(word,
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FIELD_GET(GENMASK(15, 11),
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ret)));
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int
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mp2925_identify_vout_scale(struct i2c_client *client, struct pmbus_driver_info *info,
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int page)
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{
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struct mp2925_data *data = to_mp2925_data(info);
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int ret;
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_read_byte_data(client, PMBUS_VOUT_MODE);
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if (ret < 0)
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return ret;
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if (FIELD_GET(GENMASK(5, 5), ret)) {
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE,
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page == 0 ? 3 : 4);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_read_word_data(client, MFR_VR_MULTI_CONFIG);
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if (ret < 0)
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return ret;
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if (FIELD_GET(GENMASK(5, 5), ret))
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data->vout_scale[page] = 2560;
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else
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data->vout_scale[page] = 5120;
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} else if (FIELD_GET(GENMASK(4, 4), ret)) {
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data->vout_scale[page] = 1;
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} else {
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data->vout_scale[page] = 512;
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}
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return 0;
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}
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static int mp2925_identify(struct i2c_client *client, struct pmbus_driver_info *info)
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{
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int ret;
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ret = mp2925_identify_vout_scale(client, info, 0);
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if (ret < 0)
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return ret;
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return mp2925_identify_vout_scale(client, info, 1);
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}
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static const struct pmbus_driver_info mp2925_info = {
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.pages = MP2925_PAGE_NUM,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_CURRENT_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_VOLTAGE_OUT] = direct,
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.m[PSC_VOLTAGE_OUT] = 1,
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.R[PSC_VOLTAGE_OUT] = 3,
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.b[PSC_VOLTAGE_OUT] = 0,
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.func[0] = MP2925_RAIL1_FUNC,
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.func[1] = MP2925_RAIL2_FUNC,
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.read_word_data = mp2925_read_word_data,
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.read_byte_data = mp2925_read_byte_data,
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.write_word_data = mp2925_write_word_data,
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.identify = mp2925_identify,
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};
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static int mp2925_probe(struct i2c_client *client)
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{
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struct mp2925_data *data;
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data = devm_kzalloc(&client->dev, sizeof(struct mp2925_data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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memcpy(&data->info, &mp2925_info, sizeof(mp2925_info));
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return pmbus_do_probe(client, &data->info);
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}
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|
||||
static const struct i2c_device_id mp2925_id[] = {
|
||||
{"mp2925"},
|
||||
{"mp2929"},
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, mp2925_id);
|
||||
|
||||
static const struct of_device_id __maybe_unused mp2925_of_match[] = {
|
||||
{.compatible = "mps,mp2925"},
|
||||
{.compatible = "mps,mp2929"},
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, mp2925_of_match);
|
||||
|
||||
static struct i2c_driver mp2925_driver = {
|
||||
.driver = {
|
||||
.name = "mp2925",
|
||||
.of_match_table = mp2925_of_match,
|
||||
},
|
||||
.probe = mp2925_probe,
|
||||
.id_table = mp2925_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(mp2925_driver);
|
||||
|
||||
MODULE_AUTHOR("Wensheng Wang <wenswang@yeah.net>");
|
||||
MODULE_DESCRIPTION("PMBus driver for MPS MP2925");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_IMPORT_NS("PMBUS");
|
||||
Loading…
Add table
Add a link
Reference in a new issue