mirror of https://github.com/torvalds/linux.git
hwmon: (pmbus) add driver for MPS MP9945
Add support for mp9945 device from Monolithic Power Systems, Inc. (MPS) vendor. This is a single phase digital step down converter. Signed-off-by: Cosmo Chou <chou.cosmo@gmail.com> Link: https://lore.kernel.org/r/20251009205458.396368-2-chou.cosmo@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Cosmo Chou
Guenter Roeck
parent
6e11e29d22
commit
6923e2827d
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@ -186,6 +186,7 @@ Hardware Monitoring Kernel Drivers
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mp5920
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mp5990
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mp9941
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mp9945
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mpq8785
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nct6683
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nct6775
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@ -0,0 +1,117 @@
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver mp9945
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=====================
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Supported chips:
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* MPS mp9945
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Prefix: 'mp9945'
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Author:
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Cosmo Chou <chou.cosmo@gmail.com>
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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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MP9945 Digital Single-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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**in2_min**
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**in2_min_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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**curr1_max**
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**curr1_max_alarm**
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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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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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The driver provides the following attributes for output power:
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**power2_input**
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**power2_label**
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**power2_max**
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**power2_max_alarm**
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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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@ -17499,6 +17499,13 @@ S: Maintained
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F: Documentation/hwmon/mp9941.rst
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F: drivers/hwmon/pmbus/mp9941.c
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MPS MP9945 DRIVER
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M: Cosmo Chou <chou.cosmo@gmail.com>
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L: linux-hwmon@vger.kernel.org
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S: Maintained
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F: Documentation/hwmon/mp9945.rst
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F: drivers/hwmon/pmbus/mp9945.c
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MR800 AVERMEDIA USB FM RADIO DRIVER
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M: Alexey Klimov <alexey.klimov@linaro.org>
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L: linux-media@vger.kernel.org
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@ -490,6 +490,15 @@ config SENSORS_MP9941
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This driver can also be built as a module. If so, the module will
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be called mp9941.
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config SENSORS_MP9945
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tristate "MPS MP9945"
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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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MP9945.
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This driver can also be built as a module. If so, the module will
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be called mp9945.
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config SENSORS_MPQ7932_REGULATOR
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bool "Regulator support for MPQ7932"
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depends on SENSORS_MPQ7932 && REGULATOR
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@ -49,6 +49,7 @@ obj-$(CONFIG_SENSORS_MP5023) += mp5023.o
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obj-$(CONFIG_SENSORS_MP5920) += mp5920.o
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obj-$(CONFIG_SENSORS_MP5990) += mp5990.o
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obj-$(CONFIG_SENSORS_MP9941) += mp9941.o
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obj-$(CONFIG_SENSORS_MP9945) += mp9945.o
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obj-$(CONFIG_SENSORS_MPQ7932) += mpq7932.o
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obj-$(CONFIG_SENSORS_MPQ8785) += mpq8785.o
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obj-$(CONFIG_SENSORS_PLI1209BC) += pli1209bc.o
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@ -0,0 +1,243 @@
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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 Single-phase Digital VR Controllers(MP9945)
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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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#define MFR_VR_MULTI_CONFIG_R1 0x08
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#define MFR_SVID_CFG_R1 0xBD
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/* VOUT_MODE register values */
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#define VOUT_MODE_LINEAR16 0x17
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#define VOUT_MODE_VID 0x21
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#define VOUT_MODE_DIRECT 0x40
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#define MP9945_PAGE_NUM 1
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#define MP9945_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \
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PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | \
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PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | \
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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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enum mp9945_vout_mode {
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MP9945_VOUT_MODE_VID,
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MP9945_VOUT_MODE_DIRECT,
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MP9945_VOUT_MODE_LINEAR16,
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};
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struct mp9945_data {
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struct pmbus_driver_info info;
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enum mp9945_vout_mode vout_mode;
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int vid_resolution;
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int vid_offset;
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};
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#define to_mp9945_data(x) container_of(x, struct mp9945_data, info)
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static int mp9945_read_vout(struct i2c_client *client, struct mp9945_data *data)
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{
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int ret;
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ret = i2c_smbus_read_word_data(client, PMBUS_READ_VOUT);
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if (ret < 0)
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return ret;
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ret &= GENMASK(11, 0);
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switch (data->vout_mode) {
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case MP9945_VOUT_MODE_VID:
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if (ret > 0)
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ret = (ret + data->vid_offset) * data->vid_resolution;
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break;
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case MP9945_VOUT_MODE_DIRECT:
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break;
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case MP9945_VOUT_MODE_LINEAR16:
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/* LSB: 1000 * 2^-9 (mV) */
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ret = DIV_ROUND_CLOSEST(ret * 125, 64);
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break;
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default:
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return -ENODEV;
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}
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return ret;
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}
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static int mp9945_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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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
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if (ret < 0)
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return ret;
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switch (reg) {
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case PMBUS_VOUT_MODE:
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/*
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* Override VOUT_MODE to DIRECT as the driver handles custom
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* VOUT format conversions internally.
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*/
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return PB_VOUT_MODE_DIRECT;
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default:
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return -ENODATA;
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}
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}
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static int mp9945_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 mp9945_data *data = to_mp9945_data(info);
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int ret;
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
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if (ret < 0)
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return ret;
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switch (reg) {
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case PMBUS_READ_VOUT:
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ret = mp9945_read_vout(client, data);
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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 = i2c_smbus_read_word_data(client, reg);
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if (ret < 0)
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return ret;
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/* LSB: 1.95 (mV) */
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ret = DIV_ROUND_CLOSEST((ret & GENMASK(11, 0)) * 39, 20);
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break;
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case PMBUS_VOUT_UV_WARN_LIMIT:
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ret = i2c_smbus_read_word_data(client, reg);
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if (ret < 0)
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return ret;
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ret &= GENMASK(9, 0);
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if (ret > 0)
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ret = (ret + data->vid_offset) * data->vid_resolution;
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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 mp9945_identify(struct i2c_client *client,
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struct pmbus_driver_info *info)
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{
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struct mp9945_data *data = to_mp9945_data(info);
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int 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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switch (ret) {
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case VOUT_MODE_LINEAR16:
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data->vout_mode = MP9945_VOUT_MODE_LINEAR16;
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break;
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case VOUT_MODE_VID:
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data->vout_mode = MP9945_VOUT_MODE_VID;
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break;
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case VOUT_MODE_DIRECT:
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data->vout_mode = MP9945_VOUT_MODE_DIRECT;
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break;
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default:
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return -ENODEV;
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}
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 3);
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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_R1);
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if (ret < 0)
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return ret;
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data->vid_resolution = (FIELD_GET(BIT(2), ret)) ? 5 : 10;
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ret = i2c_smbus_read_word_data(client, MFR_SVID_CFG_R1);
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if (ret < 0)
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return ret;
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data->vid_offset = (FIELD_GET(BIT(15), ret)) ? 19 : 49;
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return i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
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}
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static struct pmbus_driver_info mp9945_info = {
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.pages = MP9945_PAGE_NUM,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = direct,
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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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.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] = MP9945_RAIL1_FUNC,
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.read_word_data = mp9945_read_word_data,
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.read_byte_data = mp9945_read_byte_data,
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.identify = mp9945_identify,
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};
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static int mp9945_probe(struct i2c_client *client)
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{
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struct mp9945_data *data;
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int ret;
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data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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memcpy(&data->info, &mp9945_info, sizeof(mp9945_info));
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/*
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* Set page 0 before probe. The core reads paged registers which are
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* only on page 0 for this device.
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*/
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
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if (ret < 0)
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return ret;
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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 mp9945_id[] = {
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{"mp9945"},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, mp9945_id);
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static const struct of_device_id __maybe_unused mp9945_of_match[] = {
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{.compatible = "mps,mp9945"},
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{}
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};
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MODULE_DEVICE_TABLE(of, mp9945_of_match);
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static struct i2c_driver mp9945_driver = {
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.driver = {
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.name = "mp9945",
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.of_match_table = of_match_ptr(mp9945_of_match),
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},
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.probe = mp9945_probe,
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.id_table = mp9945_id,
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};
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module_i2c_driver(mp9945_driver);
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MODULE_AUTHOR("Cosmo Chou <chou.cosmo@gmail.com>");
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MODULE_DESCRIPTION("PMBus driver for MPS MP9945");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("PMBUS");
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