Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
hwmon: add MP29502 driver
Add support for MPS VR controller mp29502. This driver exposes
telemetry and limits value readings and writtings.
Signed-off-by: Wensheng Wang <wenswang@yeah.net>
Link: https://lore.kernel.org/r/20250805102020.749850-3-wenswang@yeah.net
[groeck: Fixed document formatting]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
authored by
Wensheng Wang
and committed by
Guenter Roeck
90bad684
a3a2923a
+781
+1
Documentation/hwmon/index.rst
+1
Documentation/hwmon/index.rst
+93
Documentation/hwmon/mp29502.rst
+93
Documentation/hwmon/mp29502.rst
···
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver mp29502
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=====================
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Supported chips:
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* MPS mp29502
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Prefix: 'mp29502'
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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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MP29502 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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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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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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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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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**
+7
MAINTAINERS
+7
MAINTAINERS
···
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F: Documentation/hwmon/mp2891.rst
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F: drivers/hwmon/pmbus/mp2891.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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S: Maintained
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F: Documentation/hwmon/mp29502.rst
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F: drivers/hwmon/pmbus/mp29502.c
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MPS MP2993 DRIVER
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M: Noah Wang <noahwang.wang@outlook.com>
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L: linux-hwmon@vger.kernel.org
+9
drivers/hwmon/pmbus/Kconfig
+9
drivers/hwmon/pmbus/Kconfig
···
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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_MP29502
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tristate "MPS MP29502"
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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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MP29502 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 mp29502.
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config SENSORS_MP2975
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tristate "MPS MP2975"
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help
+1
drivers/hwmon/pmbus/Makefile
+1
drivers/hwmon/pmbus/Makefile
···
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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_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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obj-$(CONFIG_SENSORS_MP5023) += mp5023.o
+670
drivers/hwmon/pmbus/mp29502.c
+670
drivers/hwmon/pmbus/mp29502.c
···
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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(MP29502)
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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_VOUT_SCALE_LOOP 0x29
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#define MFR_SVI3_IOUT_PRT 0x67
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#define MFR_READ_PIN_EST 0x94
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#define MFR_READ_IIN_EST 0x95
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#define MFR_VOUT_PROT1 0x3D
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#define MFR_VOUT_PROT2 0x51
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#define MFR_SLOPE_CNT_SET 0xA8
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#define MFR_TSNS_FLT_SET 0xBB
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#define MP29502_VIN_OV_GAIN 4
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#define MP29502_TEMP_LIMIT_OFFSET 40
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#define MP29502_READ_VOUT_DIV 1024
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#define MP29502_READ_IOUT_DIV 32
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#define MP29502_IOUT_LIMIT_UINT 8
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#define MP29502_OVUV_LIMIT_SCALE 10
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#define MP28502_VOUT_OV_GAIN 512
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#define MP28502_VOUT_OV_SCALE 40
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#define MP29502_VOUT_UV_OFFSET 36
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#define MP29502_PIN_GAIN 2
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#define MP29502_IIN_DIV 2
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#define MP29502_PAGE_NUM 1
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#define MP29502_RAIL_FUNC (PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \
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PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | \
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PMBUS_HAVE_TEMP | PMBUS_HAVE_PIN | \
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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 mp29502_data {
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struct pmbus_driver_info info;
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int vout_scale;
47
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int vout_bottom_div;
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int vout_top_div;
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int ovp_div;
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int iout_scale;
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};
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#define to_mp29502_data(x) container_of(x, struct mp29502_data, info)
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static u16 mp29502_reg2data_linear11(u16 word)
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{
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s16 exponent;
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s32 mantissa;
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s64 val;
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exponent = ((s16)word) >> 11;
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mantissa = ((s16)((word & 0x7ff) << 5)) >> 5;
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val = mantissa;
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if (exponent >= 0)
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val <<= exponent;
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else
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val >>= -exponent;
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return val;
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}
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static int
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mp29502_identify_vout_scale(struct i2c_client *client, struct pmbus_driver_info *info,
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int page)
76
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{
77
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struct mp29502_data *data = to_mp29502_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_word_data(client, MFR_VOUT_SCALE_LOOP);
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if (ret < 0)
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return ret;
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switch (FIELD_GET(GENMASK(12, 10), ret)) {
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case 0:
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data->vout_scale = 6400;
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break;
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case 1:
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data->vout_scale = 5120;
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break;
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case 2:
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data->vout_scale = 2560;
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break;
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case 3:
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data->vout_scale = 2048;
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break;
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case 4:
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data->vout_scale = 1024;
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break;
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case 5:
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data->vout_scale = 4;
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break;
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case 6:
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data->vout_scale = 2;
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break;
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case 7:
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data->vout_scale = 1;
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break;
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default:
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data->vout_scale = 1;
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break;
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}
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return 0;
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}
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static int
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mp29502_identify_vout_divider(struct i2c_client *client, struct pmbus_driver_info *info,
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int page)
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{
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struct mp29502_data *data = to_mp29502_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_word_data(client, MFR_VOUT_PROT1);
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if (ret < 0)
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return ret;
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data->vout_bottom_div = FIELD_GET(GENMASK(11, 0), ret);
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ret = i2c_smbus_read_word_data(client, MFR_VOUT_PROT2);
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if (ret < 0)
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return ret;
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data->vout_top_div = FIELD_GET(GENMASK(14, 0), ret);
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return 0;
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}
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static int
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mp29502_identify_ovp_divider(struct i2c_client *client, struct pmbus_driver_info *info,
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int page)
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{
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struct mp29502_data *data = to_mp29502_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_word_data(client, MFR_SLOPE_CNT_SET);
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if (ret < 0)
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return ret;
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data->ovp_div = FIELD_GET(GENMASK(9, 0), ret);
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return 0;
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}
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static int
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mp29502_identify_iout_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 mp29502_data *data = to_mp29502_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_word_data(client, MFR_SVI3_IOUT_PRT);
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if (ret < 0)
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return ret;
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switch (ret & GENMASK(2, 0)) {
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case 0:
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case 6:
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data->iout_scale = 32;
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break;
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case 1:
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data->iout_scale = 1;
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break;
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case 2:
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data->iout_scale = 2;
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break;
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case 3:
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data->iout_scale = 4;
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break;
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case 4:
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data->iout_scale = 8;
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break;
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case 5:
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data->iout_scale = 16;
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break;
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default:
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data->iout_scale = 64;
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break;
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}
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return 0;
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}
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static int mp29502_read_vout_ov_limit(struct i2c_client *client, struct mp29502_data *data)
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{
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int ret;
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int ov_value;
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/*
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* This is because the vout ov fault limit value comes from
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* page1 MFR_TSNS_FLT_SET reg, and other telemetry and limit
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* value comes from page0 reg. So the page should be set to
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* 0 after the reading of vout ov limit.
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*/
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 1);
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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_TSNS_FLT_SET);
226
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if (ret < 0)
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return ret;
228
+
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ov_value = DIV_ROUND_CLOSEST(FIELD_GET(GENMASK(12, 7), ret) *
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MP28502_VOUT_OV_GAIN * MP28502_VOUT_OV_SCALE,
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data->ovp_div);
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
234
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if (ret < 0)
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return ret;
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return ov_value;
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}
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static int mp29502_write_vout_ov_limit(struct i2c_client *client, u16 word,
241
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struct mp29502_data *data)
242
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{
243
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int ret;
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+
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/*
246
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* This is because the vout ov fault limit value comes from
247
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* page1 MFR_TSNS_FLT_SET reg, and other telemetry and limit
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* value comes from page0 reg. So the page should be set to
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* 0 after the writing of vout ov limit.
250
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*/
251
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 1);
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if (ret < 0)
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return ret;
254
+
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ret = i2c_smbus_read_word_data(client, MFR_TSNS_FLT_SET);
256
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if (ret < 0)
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return ret;
258
+
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ret = i2c_smbus_write_word_data(client, MFR_TSNS_FLT_SET,
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(ret & ~GENMASK(12, 7)) |
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FIELD_PREP(GENMASK(12, 7),
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DIV_ROUND_CLOSEST(word * data->ovp_div,
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MP28502_VOUT_OV_GAIN * MP28502_VOUT_OV_SCALE)));
264
+
265
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return i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
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}
267
+
268
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static int mp29502_read_byte_data(struct i2c_client *client, int page, int reg)
269
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{
270
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int ret;
271
+
272
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ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
273
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if (ret < 0)
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return ret;
275
+
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switch (reg) {
277
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case PMBUS_VOUT_MODE:
278
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ret = PB_VOUT_MODE_DIRECT;
279
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break;
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default:
281
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ret = -ENODATA;
282
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break;
283
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}
284
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285
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return ret;
286
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}
287
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288
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static int mp29502_read_word_data(struct i2c_client *client, int page,
289
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int phase, int reg)
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{
291
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
292
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struct mp29502_data *data = to_mp29502_data(info);
293
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int ret;
294
+
295
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switch (reg) {
296
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case PMBUS_STATUS_WORD:
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ret = -ENODATA;
298
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break;
299
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case PMBUS_READ_VIN:
300
+
/*
301
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* The MP29502 PMBUS_READ_VIN[10:0] is the vin value, the vin scale is
302
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* 125mV/LSB. And the vin scale is set to 125mV/Lsb(using r/m/b scale)
303
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* in MP29502 pmbus_driver_info struct, so the word data bit0-bit10 can
304
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* be returned to pmbus core directly.
305
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*/
306
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ret = pmbus_read_word_data(client, page, phase, reg);
307
+
if (ret < 0)
308
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return ret;
309
+
310
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ret = FIELD_GET(GENMASK(10, 0), ret);
311
+
break;
312
+
case PMBUS_READ_VOUT:
313
+
/*
314
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* The MP29502 PMBUS_READ_VOUT[11:0] is the vout value, and vout
315
+
* value is calculated based on vout scale and vout divider.
316
+
*/
317
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ret = pmbus_read_word_data(client, page, phase, reg);
318
+
if (ret < 0)
319
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return ret;
320
+
321
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ret = DIV_ROUND_CLOSEST((ret & GENMASK(11, 0)) *
322
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data->vout_scale *
323
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(data->vout_bottom_div +
324
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4 * data->vout_top_div),
325
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MP29502_READ_VOUT_DIV *
326
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data->vout_bottom_div);
327
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break;
328
+
case PMBUS_READ_IIN:
329
+
/*
330
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* The MP29502 MFR_READ_IIN_EST register is linear11 format, and the
331
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* exponent is not a constant value. But the iin scale is set to
332
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* 1A/Lsb(using r/m/b scale). As a result, the iin read from MP29502
333
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* should be calculated to A, then return the result to pmbus core.
334
+
*/
335
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ret = pmbus_read_word_data(client, page, phase, MFR_READ_IIN_EST);
336
+
if (ret < 0)
337
+
return ret;
338
+
339
+
ret = DIV_ROUND_CLOSEST(mp29502_reg2data_linear11(ret),
340
+
MP29502_IIN_DIV);
341
+
break;
342
+
case PMBUS_READ_PIN:
343
+
/*
344
+
* The MP29502 MFR_READ_PIN_EST register is linear11 format, and the
345
+
* exponent is not a constant value. But the pin scale is set to
346
+
* 1W/Lsb(using r/m/b scale). As a result, the pout read from MP29502
347
+
* should be calculated to W, then return the result to pmbus core.
348
+
*/
349
+
ret = pmbus_read_word_data(client, page, phase, MFR_READ_PIN_EST);
350
+
if (ret < 0)
351
+
return ret;
352
+
353
+
ret = mp29502_reg2data_linear11(ret) * MP29502_PIN_GAIN;
354
+
break;
355
+
case PMBUS_READ_POUT:
356
+
/*
357
+
* The MP29502 PMBUS_READ_POUT register is linear11 format, and the
358
+
* exponent is not a constant value. But the pout scale is set to
359
+
* 1W/Lsb(using r/m/b scale). As a result, the pout read from MP29502
360
+
* should be calculated to W, then return the result to pmbus core.
361
+
* And the pout is calculated based on vout divider.
362
+
*/
363
+
ret = pmbus_read_word_data(client, page, phase, reg);
364
+
if (ret < 0)
365
+
return ret;
366
+
367
+
ret = DIV_ROUND_CLOSEST(mp29502_reg2data_linear11(ret) *
368
+
(data->vout_bottom_div +
369
+
4 * data->vout_top_div),
370
+
data->vout_bottom_div);
371
+
break;
372
+
case PMBUS_READ_IOUT:
373
+
ret = pmbus_read_word_data(client, page, phase, reg);
374
+
if (ret < 0)
375
+
return ret;
376
+
377
+
ret = DIV_ROUND_CLOSEST((ret & GENMASK(10, 0)) * data->iout_scale,
378
+
MP29502_READ_IOUT_DIV);
379
+
break;
380
+
case PMBUS_READ_TEMPERATURE_1:
381
+
ret = pmbus_read_word_data(client, page, phase, reg);
382
+
if (ret < 0)
383
+
return ret;
384
+
385
+
ret = FIELD_GET(GENMASK(10, 0), ret);
386
+
break;
387
+
case PMBUS_VIN_OV_FAULT_LIMIT:
388
+
/*
389
+
* The MP29502 PMBUS_VIN_OV_FAULT_LIMIT is 500mV/Lsb, but
390
+
* the vin scale is set to 125mV/Lsb(using r/m/b scale),
391
+
* so the word data should multiply by 4.
392
+
*/
393
+
ret = pmbus_read_word_data(client, page, phase, reg);
394
+
if (ret < 0)
395
+
return ret;
396
+
397
+
ret = FIELD_GET(GENMASK(7, 0), ret) * MP29502_VIN_OV_GAIN;
398
+
break;
399
+
case PMBUS_VIN_UV_WARN_LIMIT:
400
+
case PMBUS_VIN_UV_FAULT_LIMIT:
401
+
/*
402
+
* The MP29502 PMBUS_VIN_UV_WARN_LIMIT and PMBUS_VIN_UV_FAULT_LIMIT
403
+
* scale is 125mV/Lsb, but the vin scale is set to 125mV/Lsb(using
404
+
* r/m/b scale), so the word data bit0-bit9 can be returned to pmbus
405
+
* core directly.
406
+
*/
407
+
ret = pmbus_read_word_data(client, page, phase, reg);
408
+
if (ret < 0)
409
+
return ret;
410
+
411
+
ret = FIELD_GET(GENMASK(9, 0), ret);
412
+
break;
413
+
case PMBUS_VOUT_OV_FAULT_LIMIT:
414
+
/*
415
+
* The MP29502 vout ov fault limit value comes from
416
+
* page1 MFR_TSNS_FLT_SET[12:7].
417
+
*/
418
+
ret = mp29502_read_vout_ov_limit(client, data);
419
+
if (ret < 0)
420
+
return ret;
421
+
422
+
break;
423
+
case PMBUS_VOUT_UV_FAULT_LIMIT:
424
+
ret = pmbus_read_word_data(client, page, phase, reg);
425
+
if (ret < 0)
426
+
return ret;
427
+
428
+
ret = DIV_ROUND_CLOSEST((FIELD_GET(GENMASK(8, 0), ret) *
429
+
MP29502_OVUV_LIMIT_SCALE -
430
+
MP29502_VOUT_UV_OFFSET) *
431
+
(data->vout_bottom_div +
432
+
4 * data->vout_top_div),
433
+
data->vout_bottom_div);
434
+
break;
435
+
case PMBUS_IOUT_OC_FAULT_LIMIT:
436
+
case PMBUS_IOUT_OC_WARN_LIMIT:
437
+
ret = pmbus_read_word_data(client, page, phase, reg);
438
+
if (ret < 0)
439
+
return ret;
440
+
441
+
ret = DIV_ROUND_CLOSEST((ret & GENMASK(7, 0)) *
442
+
data->iout_scale *
443
+
MP29502_IOUT_LIMIT_UINT,
444
+
MP29502_READ_IOUT_DIV);
445
+
break;
446
+
case PMBUS_OT_FAULT_LIMIT:
447
+
case PMBUS_OT_WARN_LIMIT:
448
+
/*
449
+
* The scale of MP29502 PMBUS_OT_FAULT_LIMIT and PMBUS_OT_WARN_LIMIT
450
+
* is 1°C/LSB and they have 40°C offset.
451
+
*/
452
+
ret = pmbus_read_word_data(client, page, phase, reg);
453
+
if (ret < 0)
454
+
return ret;
455
+
456
+
ret = (ret & GENMASK(7, 0)) - MP29502_TEMP_LIMIT_OFFSET;
457
+
break;
458
+
default:
459
+
ret = -EINVAL;
460
+
break;
461
+
}
462
+
463
+
return ret;
464
+
}
465
+
466
+
static int mp29502_write_word_data(struct i2c_client *client, int page, int reg,
467
+
u16 word)
468
+
{
469
+
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
470
+
struct mp29502_data *data = to_mp29502_data(info);
471
+
int ret;
472
+
473
+
ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
474
+
if (ret < 0)
475
+
return ret;
476
+
477
+
switch (reg) {
478
+
case PMBUS_VIN_OV_FAULT_LIMIT:
479
+
/*
480
+
* The PMBUS_VIN_OV_FAULT_LIMIT[7:0] is the limit value,
481
+
* and bit8-bit15 should not be changed. The scale of
482
+
* PMBUS_VIN_OV_FAULT_LIMIT is 500mV/Lsb, but the vin
483
+
* scale is set to 125mV/Lsb(using r/m/b scale), so
484
+
* the word data should divide by 4.
485
+
*/
486
+
ret = pmbus_read_word_data(client, page, 0xff, reg);
487
+
if (ret < 0)
488
+
return ret;
489
+
490
+
ret = pmbus_write_word_data(client, page, reg,
491
+
(ret & ~GENMASK(7, 0)) |
492
+
FIELD_PREP(GENMASK(7, 0),
493
+
DIV_ROUND_CLOSEST(word,
494
+
MP29502_VIN_OV_GAIN)));
495
+
break;
496
+
case PMBUS_VIN_UV_WARN_LIMIT:
497
+
case PMBUS_VIN_UV_FAULT_LIMIT:
498
+
/*
499
+
* The PMBUS_VIN_UV_WARN_LIMIT[9:0] and PMBUS_VIN_UV_FAULT_LIMIT[9:0]
500
+
* are the limit value, and bit10-bit15 should not be changed.
501
+
*/
502
+
ret = pmbus_read_word_data(client, page, 0xff, reg);
503
+
if (ret < 0)
504
+
return ret;
505
+
506
+
ret = pmbus_write_word_data(client, page, reg,
507
+
(ret & ~GENMASK(9, 0)) |
508
+
FIELD_PREP(GENMASK(9, 0),
509
+
word));
510
+
break;
511
+
case PMBUS_VOUT_OV_FAULT_LIMIT:
512
+
ret = mp29502_write_vout_ov_limit(client, word, data);
513
+
if (ret < 0)
514
+
return ret;
515
+
516
+
break;
517
+
case PMBUS_VOUT_UV_FAULT_LIMIT:
518
+
ret = pmbus_read_word_data(client, page, 0xff, reg);
519
+
if (ret < 0)
520
+
return ret;
521
+
522
+
ret = pmbus_write_word_data(client, page, reg,
523
+
(ret & ~GENMASK(8, 0)) |
524
+
FIELD_PREP(GENMASK(8, 0),
525
+
DIV_ROUND_CLOSEST(word *
526
+
data->vout_bottom_div +
527
+
MP29502_VOUT_UV_OFFSET *
528
+
(data->vout_bottom_div +
529
+
4 * data->vout_top_div),
530
+
MP29502_OVUV_LIMIT_SCALE *
531
+
(data->vout_bottom_div +
532
+
4 * data->vout_top_div))));
533
+
break;
534
+
case PMBUS_IOUT_OC_FAULT_LIMIT:
535
+
case PMBUS_IOUT_OC_WARN_LIMIT:
536
+
ret = pmbus_write_word_data(client, page, reg,
537
+
DIV_ROUND_CLOSEST(word *
538
+
MP29502_READ_IOUT_DIV,
539
+
MP29502_IOUT_LIMIT_UINT *
540
+
data->iout_scale));
541
+
break;
542
+
case PMBUS_OT_FAULT_LIMIT:
543
+
case PMBUS_OT_WARN_LIMIT:
544
+
/*
545
+
* The PMBUS_OT_FAULT_LIMIT[7:0] and PMBUS_OT_WARN_LIMIT[7:0]
546
+
* are the limit value, and bit8-bit15 should not be changed.
547
+
*/
548
+
ret = pmbus_read_word_data(client, page, 0xff, reg);
549
+
if (ret < 0)
550
+
return ret;
551
+
552
+
ret = pmbus_write_word_data(client, page, reg,
553
+
(ret & ~GENMASK(7, 0)) |
554
+
FIELD_PREP(GENMASK(7, 0),
555
+
word + MP29502_TEMP_LIMIT_OFFSET));
556
+
break;
557
+
default:
558
+
ret = -EINVAL;
559
+
break;
560
+
}
561
+
562
+
return ret;
563
+
}
564
+
565
+
static int mp29502_identify(struct i2c_client *client, struct pmbus_driver_info *info)
566
+
{
567
+
int ret;
568
+
569
+
/* Identify vout scale */
570
+
ret = mp29502_identify_vout_scale(client, info, 0);
571
+
if (ret < 0)
572
+
return ret;
573
+
574
+
/* Identify vout divider. */
575
+
ret = mp29502_identify_vout_divider(client, info, 1);
576
+
if (ret < 0)
577
+
return ret;
578
+
579
+
/* Identify ovp divider. */
580
+
ret = mp29502_identify_ovp_divider(client, info, 1);
581
+
if (ret < 0)
582
+
return ret;
583
+
584
+
/* Identify iout scale */
585
+
return mp29502_identify_iout_scale(client, info, 0);
586
+
}
587
+
588
+
static const struct pmbus_driver_info mp29502_info = {
589
+
.pages = MP29502_PAGE_NUM,
590
+
.format[PSC_VOLTAGE_IN] = direct,
591
+
.format[PSC_TEMPERATURE] = direct,
592
+
.format[PSC_CURRENT_IN] = direct,
593
+
.format[PSC_CURRENT_OUT] = direct,
594
+
.format[PSC_VOLTAGE_OUT] = direct,
595
+
.format[PSC_POWER] = direct,
596
+
597
+
.m[PSC_VOLTAGE_IN] = 8,
598
+
.R[PSC_VOLTAGE_IN] = 0,
599
+
.b[PSC_VOLTAGE_IN] = 0,
600
+
601
+
.m[PSC_VOLTAGE_OUT] = 1,
602
+
.R[PSC_VOLTAGE_OUT] = 3,
603
+
.b[PSC_VOLTAGE_OUT] = 0,
604
+
605
+
.m[PSC_TEMPERATURE] = 1,
606
+
.R[PSC_TEMPERATURE] = 0,
607
+
.b[PSC_TEMPERATURE] = 0,
608
+
609
+
.m[PSC_CURRENT_IN] = 1,
610
+
.R[PSC_CURRENT_IN] = 0,
611
+
.b[PSC_CURRENT_IN] = 0,
612
+
613
+
.m[PSC_CURRENT_OUT] = 1,
614
+
.R[PSC_CURRENT_OUT] = 0,
615
+
.b[PSC_CURRENT_OUT] = 0,
616
+
617
+
.m[PSC_POWER] = 1,
618
+
.R[PSC_POWER] = 0,
619
+
.b[PSC_POWER] = 0,
620
+
621
+
.func[0] = MP29502_RAIL_FUNC,
622
+
.read_word_data = mp29502_read_word_data,
623
+
.read_byte_data = mp29502_read_byte_data,
624
+
.write_word_data = mp29502_write_word_data,
625
+
.identify = mp29502_identify,
626
+
};
627
+
628
+
static int mp29502_probe(struct i2c_client *client)
629
+
{
630
+
struct pmbus_driver_info *info;
631
+
struct mp29502_data *data;
632
+
633
+
data = devm_kzalloc(&client->dev, sizeof(struct mp29502_data),
634
+
GFP_KERNEL);
635
+
if (!data)
636
+
return -ENOMEM;
637
+
638
+
memcpy(&data->info, &mp29502_info, sizeof(*info));
639
+
info = &data->info;
640
+
641
+
return pmbus_do_probe(client, info);
642
+
}
643
+
644
+
static const struct i2c_device_id mp29502_id[] = {
645
+
{"mp29502", 0},
646
+
{}
647
+
};
648
+
MODULE_DEVICE_TABLE(i2c, mp29502_id);
649
+
650
+
static const struct of_device_id __maybe_unused mp29502_of_match[] = {
651
+
{.compatible = "mps,mp29502"},
652
+
{}
653
+
};
654
+
MODULE_DEVICE_TABLE(of, mp29502_of_match);
655
+
656
+
static struct i2c_driver mp29502_driver = {
657
+
.driver = {
658
+
.name = "mp29502",
659
+
.of_match_table = mp29502_of_match,
660
+
},
661
+
.probe = mp29502_probe,
662
+
.id_table = mp29502_id,
663
+
};
664
+
665
+
module_i2c_driver(mp29502_driver);
666
+
667
+
MODULE_AUTHOR("Wensheng Wang <wenswang@yeah.net");
668
+
MODULE_DESCRIPTION("PMBus driver for MPS MP29502");
669
+
MODULE_LICENSE("GPL");
670
+
MODULE_IMPORT_NS("PMBUS");