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hwmon: add MP2869,MP29608,MP29612 and MP29816 series driver

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Add support for MPS VR mp2869/mp2869a,mp29608/mp29608a,mp29612/mp29612a
and mp29816/mp29816a/mp29816b/mp29816c 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/20250805102020.749850-2-wenswang@yeah.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Wensheng Wang
2025-08-05 18:20:19 +08:00
committed by Guenter Roeck
parent c97c66e04c
commit a3a2923aaf
6 changed files with 852 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/hwmon/index.rst
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@@ -173,6 +173,7 @@ Hardware Monitoring Kernel Drivers
menf21bmc
mlxreg-fan
mp2856
mp2869
mp2888
mp2891
mp2975

175
Documentation/hwmon/mp2869.rst Normal file
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@@ -0,0 +1,175 @@
.. SPDX-License-Identifier: GPL-2.0
Kernel driver mp2869
====================
Supported chips:
* MPS mp2869
Prefix: 'mp2869'
* MPS mp29608
Prefix: 'mp29608'
* MPS mp29612
Prefix: 'mp29612'
* MPS mp29816
Prefix: 'mp29816'
Author:
Wensheng Wang <wenswang@yeah.net>
Description
-----------
This driver implements support for Monolithic Power Systems, Inc. (MPS)
MP2869 Dual Loop Digital Multi-phase Controller.
Device compliant with:
- PMBus rev 1.3 interface.
The driver exports the following attributes via the 'sysfs' files
for input voltage:
**in1_input**
**in1_label**
**in1_crit**
**in1_crit_alarm**
**in1_lcrit**
**in1_lcrit_alarm**
**in1_min**
**in1_min_alarm**
The driver provides the following attributes for output voltage:
**in2_input**
**in2_label**
**in2_crit**
**in2_crit_alarm**
**in2_lcrit**
**in2_lcrit_alarm**
**in3_input**
**in3_label**
**in3_crit**
**in3_crit_alarm**
**in3_lcrit**
**in3_lcrit_alarm**
The driver provides the following attributes for input current:
**curr1_input**
**curr1_label**
**curr2_input**
**curr2_label**
The driver provides the following attributes for output current:
**curr3_input**
**curr3_label**
**curr3_crit**
**curr3_crit_alarm**
**curr3_max**
**curr3_max_alarm**
**curr4_input**
**curr4_label**
**curr4_crit**
**curr4_crit_alarm**
**curr4_max**
**curr4_max_alarm**
The driver provides the following attributes for input power:
**power1_input**
**power1_label**
**power2_input**
**power2_label**
The driver provides the following attributes for output power:
**power3_input**
**power3_label**
**power3_input**
**power3_label**
**power3_max**
**power3_max_alarm**
**power4_input**
**power4_label**
**power4_input**
**power4_label**
**power4_max**
**power4_max_alarm**
The driver provides the following attributes for temperature:
**temp1_input**
**temp1_crit**
**temp1_crit_alarm**
**temp1_max**
**temp1_max_alarm**
**temp2_input**
**temp2_crit**
**temp2_crit_alarm**
**temp2_max**
**temp2_max_alarm**

7
MAINTAINERS
View File

@@ -17175,6 +17175,13 @@ S: Maintained
F: Documentation/devicetree/bindings/leds/backlight/mps,mp3309c.yaml
F: drivers/video/backlight/mp3309c.c
MPS MP2869 DRIVER
M: Wensheng Wang <wenswang@yeah.net>
L: linux-hwmon@vger.kernel.org
S: Maintained
F: Documentation/hwmon/mp2869.rst
F: drivers/hwmon/pmbus/mp2869.c
MPS MP2891 DRIVER
M: Noah Wang <noahwang.wang@outlook.com>
L: linux-hwmon@vger.kernel.org

9
drivers/hwmon/pmbus/Kconfig
View File

@@ -374,6 +374,15 @@ config SENSORS_MP2856
This driver can also be built as a module. If so, the module will
be called mp2856.
config SENSORS_MP2869
tristate "MPS MP2869"
help
If you say yes here you get hardware monitoring support for MPS
MP2869 Dual Loop Digital Multi-Phase Controller.
This driver can also be built as a module. If so, the module will
be called mp2869.
config SENSORS_MP2888
tristate "MPS MP2888"
help

1
drivers/hwmon/pmbus/Makefile
View File

@@ -37,6 +37,7 @@ obj-$(CONFIG_SENSORS_MAX31785) += max31785.o
obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
obj-$(CONFIG_SENSORS_MP2856) += mp2856.o
obj-$(CONFIG_SENSORS_MP2869) += mp2869.o
obj-$(CONFIG_SENSORS_MP2888) += mp2888.o
obj-$(CONFIG_SENSORS_MP2891) += mp2891.o
obj-$(CONFIG_SENSORS_MP2975) += mp2975.o

659
drivers/hwmon/pmbus/mp2869.c Normal file
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@@ -0,0 +1,659 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2869)
*/
#include <linux/bitfield.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include "pmbus.h"
/*
* Vender specific registers, the register MFR_SVI3_IOUT_PRT(0x67),
* READ_PIN_EST(0x94)and READ_IIN_EST(0x95) redefine the standard
* PMBUS register. The MFR_VOUT_LOOP_CTRL(0x29) is used to identify
* the vout scale and the MFR_SVI3_IOUT_PRT(0x67) is used to identify
* the iout scale. The READ_PIN_EST(0x94) is used to read input power
* per rail. The MP2891 does not have standard READ_IIN register(0x89),
* the iin telemetry can be obtained through the vendor redefined
* register READ_IIN_EST(0x95).
*/
#define MFR_SVI3_IOUT_PRT 0x67
#define MFR_READ_PIN_EST 0x94
#define MFR_READ_IIN_EST 0x95
#define MFR_TSNS_FLT_SET 0xBB
#define MP2869_VIN_OV_FAULT_GAIN 4
#define MP2869_READ_VOUT_DIV 1024
#define MP2869_READ_IOUT_DIV 32
#define MP2869_OVUV_LIMIT_SCALE 10
#define MP2869_OVUV_DELTA_SCALE 50
#define MP2869_TEMP_LIMIT_OFFSET 40
#define MP2869_IOUT_LIMIT_UINT 8
#define MP2869_POUT_OP_GAIN 2
#define MP2869_PAGE_NUM 2
#define MP2869_RAIL1_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \
PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \
PMBUS_HAVE_TEMP | PMBUS_HAVE_PIN | \
PMBUS_HAVE_IIN | \
PMBUS_HAVE_STATUS_VOUT | \
PMBUS_HAVE_STATUS_IOUT | \
PMBUS_HAVE_STATUS_TEMP | \
PMBUS_HAVE_STATUS_INPUT)
#define MP2869_RAIL2_FUNC (PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \
PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | \
PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | \
PMBUS_HAVE_STATUS_VOUT | \
PMBUS_HAVE_STATUS_IOUT | \
PMBUS_HAVE_STATUS_TEMP | \
PMBUS_HAVE_STATUS_INPUT)
struct mp2869_data {
struct pmbus_driver_info info;
bool mfr_thwn_flt_en;
int vout_scale[MP2869_PAGE_NUM];
int iout_scale[MP2869_PAGE_NUM];
};
static const int mp2869_vout_sacle[8] = {6400, 5120, 2560, 2048, 1024,
4, 2, 1};
static const int mp2869_iout_sacle[8] = {32, 1, 2, 4, 8, 16, 32, 64};
#define to_mp2869_data(x) container_of(x, struct mp2869_data, info)
static u16 mp2869_reg2data_linear11(u16 word)
{
s16 exponent;
s32 mantissa;
s64 val;
exponent = ((s16)word) >> 11;
mantissa = ((s16)((word & 0x7ff) << 5)) >> 5;
val = mantissa;
if (exponent >= 0)
val <<= exponent;
else
val >>= -exponent;
return val;
}
static int
mp2869_identify_thwn_flt(struct i2c_client *client, struct pmbus_driver_info *info,
int page)
{
struct mp2869_data *data = to_mp2869_data(info);
int ret;
ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
if (ret < 0)
return ret;
ret = i2c_smbus_read_word_data(client, MFR_TSNS_FLT_SET);
if (ret < 0)
return ret;
data->mfr_thwn_flt_en = FIELD_GET(GENMASK(13, 13), ret);
return 0;
}
static int
mp2869_identify_vout_scale(struct i2c_client *client, struct pmbus_driver_info *info,
int page)
{
struct mp2869_data *data = to_mp2869_data(info);
int ret;
ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
if (ret < 0)
return ret;
ret = i2c_smbus_read_word_data(client, PMBUS_VOUT_SCALE_LOOP);
if (ret < 0)
return ret;
/*
* The output voltage is equal to the READ_VOUT(0x8B) register value multiply
* by vout_scale.
* Obtain vout scale from the register PMBUS_VOUT_SCALE_LOOP, bits 12-10
* PMBUS_VOUT_SCALE_LOOP[12:10]:
* 000b - 6.25mV/LSB, 001b - 5mV/LSB, 010b - 2.5mV/LSB, 011b - 2mV/LSB
* 100b - 1mV/Lsb, 101b - (1/256)mV/LSB, 110b - (1/512)mV/LSB,
* 111b - (1/1024)mV/LSB
*/
data->vout_scale[page] = mp2869_vout_sacle[FIELD_GET(GENMASK(12, 10), ret)];
return 0;
}
static int
mp2869_identify_iout_scale(struct i2c_client *client, struct pmbus_driver_info *info,
int page)
{
struct mp2869_data *data = to_mp2869_data(info);
int ret;
ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
if (ret < 0)
return ret;
ret = i2c_smbus_read_word_data(client, MFR_SVI3_IOUT_PRT);
if (ret < 0)
return ret;
/*
* The output current is equal to the READ_IOUT(0x8C) register value
* multiply by iout_scale.
* Obtain iout_scale from the register MFR_SVI3_IOUT_PRT[2:0].
* The value is selected as below:
* 000b - 1A/LSB, 001b - (1/32)A/LSB, 010b - (1/16)A/LSB,
* 011b - (1/8)A/LSB, 100b - (1/4)A/LSB, 101b - (1/2)A/LSB
* 110b - 1A/LSB, 111b - 2A/LSB
*/
data->iout_scale[page] = mp2869_iout_sacle[FIELD_GET(GENMASK(2, 0), ret)];
return 0;
}
static int mp2869_read_byte_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
struct mp2869_data *data = to_mp2869_data(info);
int ret;
switch (reg) {
case PMBUS_VOUT_MODE:
/*
* The calculation of vout in this driver is based on direct format.
* As a result, the format of vout is enforced to direct.
*/
ret = PB_VOUT_MODE_DIRECT;
break;
case PMBUS_STATUS_BYTE:
/*
* If the tsns digital fault is enabled, the TEMPERATURE flag
* of PMBUS_STATUS_BYTE should come from STATUS_MFR_SPECIFIC
* register bit1.
*/
if (!data->mfr_thwn_flt_en)
return -ENODATA;
ret = pmbus_read_byte_data(client, page, reg);
if (ret < 0)
return ret;
ret = (ret & ~GENMASK(2, 2)) |
FIELD_PREP(GENMASK(2, 2),
FIELD_GET(GENMASK(1, 1),
pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC)));
break;
case PMBUS_STATUS_TEMPERATURE:
/*
* If the tsns digital fault is enabled, the OT Fault and OT Warning
* flag of PMBUS_STATUS_TEMPERATURE should come from STATUS_MFR_SPECIFIC
* register bit1.
*/
if (!data->mfr_thwn_flt_en)
return -ENODATA;
ret = pmbus_read_byte_data(client, page, reg);
if (ret < 0)
return ret;
ret = (ret & ~GENMASK(7, 6)) |
FIELD_PREP(GENMASK(6, 6),
FIELD_GET(GENMASK(1, 1),
pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC))) |
FIELD_PREP(GENMASK(7, 7),
FIELD_GET(GENMASK(1, 1),
pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC)));
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int mp2869_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 mp2869_data *data = to_mp2869_data(info);
int ret;
switch (reg) {
case PMBUS_STATUS_WORD:
/*
* If the tsns digital fault is enabled, the OT Fault flag
* of PMBUS_STATUS_WORD should come from STATUS_MFR_SPECIFIC
* register bit1.
*/
if (!data->mfr_thwn_flt_en)
return -ENODATA;
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = (ret & ~GENMASK(2, 2)) |
FIELD_PREP(GENMASK(2, 2),
FIELD_GET(GENMASK(1, 1),
pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC)));
break;
case PMBUS_READ_VIN:
/*
* The MP2869 PMBUS_READ_VIN[10:0] is the vin value, the vin scale is
* 31.25mV/LSB. And the vin scale is set to 31.25mV/Lsb(using r/m/b scale)
* in MP2869 pmbus_driver_info struct, so the word data bit0-bit10 can be
* returned to pmbus core directly.
*/
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = FIELD_GET(GENMASK(10, 0), ret);
break;
case PMBUS_READ_IIN:
/*
* The MP2869 redefine the standard 0x95 register as iin telemetry
* per rail.
*/
ret = pmbus_read_word_data(client, page, phase, MFR_READ_IIN_EST);
if (ret < 0)
return ret;
break;
case PMBUS_READ_PIN:
/*
* The MP2869 redefine the standard 0x94 register as pin telemetry
* per rail. The MP2869 MFR_READ_PIN_EST register is linear11 format,
* but the pin scale is set to 1W/Lsb(using r/m/b scale). As a result,
* the pin read from MP2869 should be converted to W, then return
* the result to pmbus core.
*/
ret = pmbus_read_word_data(client, page, phase, MFR_READ_PIN_EST);
if (ret < 0)
return ret;
ret = mp2869_reg2data_linear11(ret);
break;
case PMBUS_READ_VOUT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = DIV_ROUND_CLOSEST((ret & GENMASK(11, 0)) * data->vout_scale[page],
MP2869_READ_VOUT_DIV);
break;
case PMBUS_READ_IOUT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = DIV_ROUND_CLOSEST((ret & GENMASK(10, 0)) * data->iout_scale[page],
MP2869_READ_IOUT_DIV);
break;
case PMBUS_READ_POUT:
/*
* The MP2869 PMBUS_READ_POUT register is linear11 format, but the pout
* scale is set to 1W/Lsb(using r/m/b scale). As a result, the pout read
* from MP2869 should be converted to W, then return the result to pmbus
* core.
*/
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = mp2869_reg2data_linear11(ret);
break;
case PMBUS_READ_TEMPERATURE_1:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = FIELD_GET(GENMASK(10, 0), ret);
break;
case PMBUS_VOUT_OV_FAULT_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
if (FIELD_GET(GENMASK(12, 9), ret))
ret = FIELD_GET(GENMASK(8, 0), ret) * MP2869_OVUV_LIMIT_SCALE +
(FIELD_GET(GENMASK(12, 9), ret) + 1) * MP2869_OVUV_DELTA_SCALE;
else
ret = FIELD_GET(GENMASK(8, 0), ret) * MP2869_OVUV_LIMIT_SCALE;
break;
case PMBUS_VOUT_UV_FAULT_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
if (FIELD_GET(GENMASK(12, 9), ret))
ret = FIELD_GET(GENMASK(8, 0), ret) * MP2869_OVUV_LIMIT_SCALE -
(FIELD_GET(GENMASK(12, 9), ret) + 1) * MP2869_OVUV_DELTA_SCALE;
else
ret = FIELD_GET(GENMASK(8, 0), ret) * MP2869_OVUV_LIMIT_SCALE;
break;
case PMBUS_OT_FAULT_LIMIT:
case PMBUS_OT_WARN_LIMIT:
/*
* The scale of MP2869 PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT
* is 1°C/LSB and they have 40°C offset.
*/
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = (ret & GENMASK(7, 0)) - MP2869_TEMP_LIMIT_OFFSET;
break;
case PMBUS_VIN_OV_FAULT_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = (ret & GENMASK(7, 0)) * MP2869_VIN_OV_FAULT_GAIN;
break;
case PMBUS_VIN_UV_WARN_LIMIT:
case PMBUS_VIN_UV_FAULT_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = FIELD_GET(GENMASK(9, 0), ret);
break;
case PMBUS_IOUT_OC_FAULT_LIMIT:
case PMBUS_IOUT_OC_WARN_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) * data->iout_scale[page] *
MP2869_IOUT_LIMIT_UINT, MP2869_READ_IOUT_DIV);
break;
case PMBUS_POUT_OP_WARN_LIMIT:
ret = pmbus_read_word_data(client, page, phase, reg);
if (ret < 0)
return ret;
ret = (ret & GENMASK(7, 0)) * MP2869_POUT_OP_GAIN;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int mp2869_write_word_data(struct i2c_client *client, int page, int reg,
u16 word)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
struct mp2869_data *data = to_mp2869_data(info);
int ret;
switch (reg) {
case PMBUS_VOUT_UV_FAULT_LIMIT:
/*
* The MP2869 PMBUS_VOUT_UV_FAULT_LIMIT[8:0] is the limit value,
* and bit9-bit15 should not be changed.
*/
ret = pmbus_read_word_data(client, page, 0xff, reg);
if (ret < 0)
return ret;
if (FIELD_GET(GENMASK(12, 9), ret))
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(8, 0)) |
FIELD_PREP(GENMASK(8, 0),
DIV_ROUND_CLOSEST(word +
(FIELD_GET(GENMASK(12, 9),
ret) + 1) *
MP2869_OVUV_DELTA_SCALE,
MP2869_OVUV_LIMIT_SCALE)));
else
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(8, 0)) |
FIELD_PREP(GENMASK(8, 0),
DIV_ROUND_CLOSEST(word,
MP2869_OVUV_LIMIT_SCALE)));
break;
case PMBUS_VOUT_OV_FAULT_LIMIT:
/*
* The MP2869 PMBUS_VOUT_OV_FAULT_LIMIT[8:0] is the limit value,
* and bit9-bit15 should not be changed.
*/
ret = pmbus_read_word_data(client, page, 0xff, reg);
if (ret < 0)
return ret;
if (FIELD_GET(GENMASK(12, 9), ret))
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(8, 0)) |
FIELD_PREP(GENMASK(8, 0),
DIV_ROUND_CLOSEST(word -
(FIELD_GET(GENMASK(12, 9),
ret) + 1) *
MP2869_OVUV_DELTA_SCALE,
MP2869_OVUV_LIMIT_SCALE)));
else
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(8, 0)) |
FIELD_PREP(GENMASK(8, 0),
DIV_ROUND_CLOSEST(word,
MP2869_OVUV_LIMIT_SCALE)));
break;
case PMBUS_OT_FAULT_LIMIT:
case PMBUS_OT_WARN_LIMIT:
/*
* If the tsns digital fault is enabled, the PMBUS_OT_FAULT_LIMIT and
* PMBUS_OT_WARN_LIMIT can not be written.
*/
if (data->mfr_thwn_flt_en)
return -EINVAL;
/*
* The MP2869 scale of MP2869 PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT
* have 40°C offset. The bit0-bit7 is the limit value, and bit8-bit15
* should not be changed.
*/
ret = pmbus_read_word_data(client, page, 0xff, reg);
if (ret < 0)
return ret;
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(7, 0)) |
FIELD_PREP(GENMASK(7, 0),
word + MP2869_TEMP_LIMIT_OFFSET));
break;
case PMBUS_VIN_OV_FAULT_LIMIT:
/*
* The MP2869 PMBUS_VIN_OV_FAULT_LIMIT[7:0] is the limit value, and bit8-bit15
* should not be changed. The scale of PMBUS_VIN_OV_FAULT_LIMIT is 125mV/Lsb,
* but the vin scale is set to 31.25mV/Lsb(using r/m/b scale), so the word data
* should divide by MP2869_VIN_OV_FAULT_GAIN(4)
*/
ret = pmbus_read_word_data(client, page, 0xff, reg);
if (ret < 0)
return ret;
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(7, 0)) |
FIELD_PREP(GENMASK(7, 0),
DIV_ROUND_CLOSEST(word,
MP2869_VIN_OV_FAULT_GAIN)));
break;
case PMBUS_VIN_UV_WARN_LIMIT:
case PMBUS_VIN_UV_FAULT_LIMIT:
/*
* The PMBUS_VIN_UV_LIMIT[9:0] is the limit value, and bit10-bit15 should
* not be changed. The scale of PMBUS_VIN_UV_LIMIT is 31.25mV/Lsb, and the
* vin scale is set to 31.25mV/Lsb(using r/m/b scale), so the word data can
* be written directly.
*/
ret = pmbus_read_word_data(client, page, 0xff, reg);
if (ret < 0)
return ret;
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(9, 0)) |
FIELD_PREP(GENMASK(9, 0),
word));
break;
case PMBUS_IOUT_OC_FAULT_LIMIT:
case PMBUS_IOUT_OC_WARN_LIMIT:
ret = pmbus_write_word_data(client, page, reg,
DIV_ROUND_CLOSEST(word * MP2869_READ_IOUT_DIV,
MP2869_IOUT_LIMIT_UINT *
data->iout_scale[page]));
break;
case PMBUS_POUT_OP_WARN_LIMIT:
/*
* The POUT_OP_WARN_LIMIT[11:0] is the limit value, and bit12-bit15 should
* not be changed. The scale of POUT_OP_WARN_LIMIT is 2W/Lsb.
*/
ret = pmbus_read_word_data(client, page, 0xff, reg);
if (ret < 0)
return ret;
ret = pmbus_write_word_data(client, page, reg,
(ret & ~GENMASK(11, 0)) |
FIELD_PREP(GENMASK(11, 0),
DIV_ROUND_CLOSEST(word,
MP2869_POUT_OP_GAIN)));
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int mp2869_identify(struct i2c_client *client, struct pmbus_driver_info *info)
{
int ret;
/* Identify whether tsns digital fault is enable */
ret = mp2869_identify_thwn_flt(client, info, 1);
if (ret < 0)
return 0;
/* Identify vout scale for rail1. */
ret = mp2869_identify_vout_scale(client, info, 0);
if (ret < 0)
return ret;
/* Identify vout scale for rail2. */
ret = mp2869_identify_vout_scale(client, info, 1);
if (ret < 0)
return ret;
/* Identify iout scale for rail 1. */
ret = mp2869_identify_iout_scale(client, info, 0);
if (ret < 0)
return ret;
/* Identify iout scale for rail 2. */
return mp2869_identify_iout_scale(client, info, 1);
}
static const struct pmbus_driver_info mp2869_info = {
.pages = MP2869_PAGE_NUM,
.format[PSC_VOLTAGE_IN] = direct,
.format[PSC_CURRENT_IN] = linear,
.format[PSC_CURRENT_OUT] = direct,
.format[PSC_TEMPERATURE] = direct,
.format[PSC_POWER] = direct,
.format[PSC_VOLTAGE_OUT] = direct,
.m[PSC_VOLTAGE_IN] = 32,
.R[PSC_VOLTAGE_IN] = 0,
.b[PSC_VOLTAGE_IN] = 0,
.m[PSC_VOLTAGE_OUT] = 1,
.R[PSC_VOLTAGE_OUT] = 3,
.b[PSC_VOLTAGE_OUT] = 0,
.m[PSC_CURRENT_OUT] = 1,
.R[PSC_CURRENT_OUT] = 0,
.b[PSC_CURRENT_OUT] = 0,
.m[PSC_TEMPERATURE] = 1,
.R[PSC_TEMPERATURE] = 0,
.b[PSC_TEMPERATURE] = 0,
.m[PSC_POWER] = 1,
.R[PSC_POWER] = 0,
.b[PSC_POWER] = 0,
.func[0] = MP2869_RAIL1_FUNC,
.func[1] = MP2869_RAIL2_FUNC,
.read_word_data = mp2869_read_word_data,
.write_word_data = mp2869_write_word_data,
.read_byte_data = mp2869_read_byte_data,
.identify = mp2869_identify,
};
static int mp2869_probe(struct i2c_client *client)
{
struct pmbus_driver_info *info;
struct mp2869_data *data;
data = devm_kzalloc(&client->dev, sizeof(struct mp2869_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
memcpy(&data->info, &mp2869_info, sizeof(*info));
info = &data->info;
return pmbus_do_probe(client, info);
}
static const struct i2c_device_id mp2869_id[] = {
{"mp2869", 0},
{"mp29608", 1},
{"mp29612", 2},
{"mp29816", 3},
{}
};
MODULE_DEVICE_TABLE(i2c, mp2869_id);
static const struct of_device_id __maybe_unused mp2869_of_match[] = {
{.compatible = "mps,mp2869", .data = (void *)0},
{.compatible = "mps,mp29608", .data = (void *)1},
{.compatible = "mps,mp29612", .data = (void *)2},
{.compatible = "mps,mp29816", .data = (void *)3},
{}
};
MODULE_DEVICE_TABLE(of, mp2869_of_match);
static struct i2c_driver mp2869_driver = {
.driver = {
.name = "mp2869",
.of_match_table = mp2869_of_match,
},
.probe = mp2869_probe,
.id_table = mp2869_id,
};
module_i2c_driver(mp2869_driver);
MODULE_AUTHOR("Wensheng Wang <wenswang@yeah.net>");
MODULE_DESCRIPTION("PMBus driver for MPS MP2869");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("PMBUS");