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807 lines
22 KiB
807 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller |
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* and Digital Power Monitor |
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* |
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* Copyright (c) 2011 Ericsson AB. |
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* Copyright (c) 2018 Guenter Roeck |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/slab.h> |
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#include <linux/i2c.h> |
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#include <linux/bitops.h> |
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#include <linux/bitfield.h> |
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#include <linux/log2.h> |
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#include "pmbus.h" |
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enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 }; |
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#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0) |
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#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5) |
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#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6) |
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#define ADM1275_PEAK_IOUT 0xd0 |
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#define ADM1275_PEAK_VIN 0xd1 |
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#define ADM1275_PEAK_VOUT 0xd2 |
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#define ADM1275_PMON_CONFIG 0xd4 |
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#define ADM1275_VIN_VOUT_SELECT BIT(6) |
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#define ADM1275_VRANGE BIT(5) |
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#define ADM1075_IRANGE_50 BIT(4) |
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#define ADM1075_IRANGE_25 BIT(3) |
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#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4)) |
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#define ADM1272_IRANGE BIT(0) |
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#define ADM1278_TEMP1_EN BIT(3) |
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#define ADM1278_VIN_EN BIT(2) |
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#define ADM1278_VOUT_EN BIT(1) |
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#define ADM1293_IRANGE_25 0 |
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#define ADM1293_IRANGE_50 BIT(6) |
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#define ADM1293_IRANGE_100 BIT(7) |
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#define ADM1293_IRANGE_200 (BIT(6) | BIT(7)) |
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#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7)) |
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#define ADM1293_VIN_SEL_012 BIT(2) |
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#define ADM1293_VIN_SEL_074 BIT(3) |
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#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3)) |
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#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3)) |
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#define ADM1293_VAUX_EN BIT(1) |
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#define ADM1278_PEAK_TEMP 0xd7 |
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#define ADM1275_IOUT_WARN2_LIMIT 0xd7 |
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#define ADM1275_DEVICE_CONFIG 0xd8 |
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#define ADM1275_IOUT_WARN2_SELECT BIT(4) |
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#define ADM1276_PEAK_PIN 0xda |
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#define ADM1075_READ_VAUX 0xdd |
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#define ADM1075_VAUX_OV_WARN_LIMIT 0xde |
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#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf |
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#define ADM1293_IOUT_MIN 0xe3 |
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#define ADM1293_PIN_MIN 0xe4 |
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#define ADM1075_VAUX_STATUS 0xf6 |
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#define ADM1075_VAUX_OV_WARN BIT(7) |
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#define ADM1075_VAUX_UV_WARN BIT(6) |
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#define ADM1275_VI_AVG_SHIFT 0 |
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#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \ |
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ADM1275_VI_AVG_SHIFT) |
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#define ADM1275_SAMPLES_AVG_MAX 128 |
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#define ADM1278_PWR_AVG_SHIFT 11 |
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#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \ |
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ADM1278_PWR_AVG_SHIFT) |
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#define ADM1278_VI_AVG_SHIFT 8 |
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#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \ |
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ADM1278_VI_AVG_SHIFT) |
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struct adm1275_data { |
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int id; |
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bool have_oc_fault; |
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bool have_uc_fault; |
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bool have_vout; |
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bool have_vaux_status; |
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bool have_mfr_vaux_status; |
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bool have_iout_min; |
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bool have_pin_min; |
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bool have_pin_max; |
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bool have_temp_max; |
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bool have_power_sampling; |
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struct pmbus_driver_info info; |
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}; |
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#define to_adm1275_data(x) container_of(x, struct adm1275_data, info) |
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struct coefficients { |
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s16 m; |
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s16 b; |
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s16 R; |
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}; |
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static const struct coefficients adm1075_coefficients[] = { |
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[0] = { 27169, 0, -1 }, /* voltage */ |
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[1] = { 806, 20475, -1 }, /* current, irange25 */ |
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[2] = { 404, 20475, -1 }, /* current, irange50 */ |
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[3] = { 8549, 0, -1 }, /* power, irange25 */ |
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[4] = { 4279, 0, -1 }, /* power, irange50 */ |
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}; |
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static const struct coefficients adm1272_coefficients[] = { |
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[0] = { 6770, 0, -2 }, /* voltage, vrange 60V */ |
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[1] = { 4062, 0, -2 }, /* voltage, vrange 100V */ |
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[2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */ |
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[3] = { 663, 20480, -1 }, /* current, vsense range 30mV */ |
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[4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */ |
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[5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */ |
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[6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */ |
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[7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */ |
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[8] = { 42, 31871, -1 }, /* temperature */ |
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}; |
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static const struct coefficients adm1275_coefficients[] = { |
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[0] = { 19199, 0, -2 }, /* voltage, vrange set */ |
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[1] = { 6720, 0, -1 }, /* voltage, vrange not set */ |
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[2] = { 807, 20475, -1 }, /* current */ |
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}; |
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static const struct coefficients adm1276_coefficients[] = { |
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[0] = { 19199, 0, -2 }, /* voltage, vrange set */ |
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[1] = { 6720, 0, -1 }, /* voltage, vrange not set */ |
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[2] = { 807, 20475, -1 }, /* current */ |
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[3] = { 6043, 0, -2 }, /* power, vrange set */ |
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[4] = { 2115, 0, -1 }, /* power, vrange not set */ |
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}; |
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static const struct coefficients adm1278_coefficients[] = { |
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[0] = { 19599, 0, -2 }, /* voltage */ |
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[1] = { 800, 20475, -1 }, /* current */ |
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[2] = { 6123, 0, -2 }, /* power */ |
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[3] = { 42, 31880, -1 }, /* temperature */ |
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}; |
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static const struct coefficients adm1293_coefficients[] = { |
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[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */ |
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[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */ |
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[2] = { 19604, -50, -2 }, /* voltage, vrange 21V */ |
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[3] = { 8000, -100, -2 }, /* current, irange25 */ |
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[4] = { 4000, -100, -2 }, /* current, irange50 */ |
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[5] = { 20000, -1000, -3 }, /* current, irange100 */ |
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[6] = { 10000, -1000, -3 }, /* current, irange200 */ |
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[7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */ |
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[8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */ |
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[9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */ |
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[10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */ |
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[11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */ |
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[12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */ |
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[13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */ |
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[14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */ |
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[15] = { 6126, 0, -2 }, /* power, 21V, irange25 */ |
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[16] = { 30631, 0, -3 }, /* power, 21V, irange50 */ |
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[17] = { 15316, 0, -3 }, /* power, 21V, irange100 */ |
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[18] = { 7658, 0, -3 }, /* power, 21V, irange200 */ |
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}; |
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static int adm1275_read_pmon_config(const struct adm1275_data *data, |
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struct i2c_client *client, bool is_power) |
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{ |
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int shift, ret; |
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u16 mask; |
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/* |
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* The PMON configuration register is a 16-bit register only on chips |
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* supporting power average sampling. On other chips it is an 8-bit |
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* register. |
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*/ |
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if (data->have_power_sampling) { |
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ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); |
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mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; |
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shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; |
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} else { |
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ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); |
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mask = ADM1275_VI_AVG_MASK; |
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shift = ADM1275_VI_AVG_SHIFT; |
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} |
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if (ret < 0) |
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return ret; |
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return (ret & mask) >> shift; |
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} |
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static int adm1275_write_pmon_config(const struct adm1275_data *data, |
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struct i2c_client *client, |
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bool is_power, u16 word) |
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{ |
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int shift, ret; |
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u16 mask; |
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if (data->have_power_sampling) { |
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ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); |
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mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; |
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shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; |
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} else { |
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ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); |
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mask = ADM1275_VI_AVG_MASK; |
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shift = ADM1275_VI_AVG_SHIFT; |
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} |
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if (ret < 0) |
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return ret; |
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word = (ret & ~mask) | ((word << shift) & mask); |
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if (data->have_power_sampling) |
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ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, |
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word); |
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else |
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ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG, |
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word); |
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return ret; |
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} |
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static int adm1275_read_word_data(struct i2c_client *client, int page, |
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int phase, 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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const struct adm1275_data *data = to_adm1275_data(info); |
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int ret = 0; |
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if (page > 0) |
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return -ENXIO; |
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switch (reg) { |
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case PMBUS_IOUT_UC_FAULT_LIMIT: |
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if (!data->have_uc_fault) |
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return -ENXIO; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1275_IOUT_WARN2_LIMIT); |
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break; |
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case PMBUS_IOUT_OC_FAULT_LIMIT: |
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if (!data->have_oc_fault) |
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return -ENXIO; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1275_IOUT_WARN2_LIMIT); |
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break; |
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case PMBUS_VOUT_OV_WARN_LIMIT: |
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if (data->have_vout) |
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return -ENODATA; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1075_VAUX_OV_WARN_LIMIT); |
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break; |
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case PMBUS_VOUT_UV_WARN_LIMIT: |
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if (data->have_vout) |
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return -ENODATA; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1075_VAUX_UV_WARN_LIMIT); |
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break; |
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case PMBUS_READ_VOUT: |
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if (data->have_vout) |
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return -ENODATA; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1075_READ_VAUX); |
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break; |
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case PMBUS_VIRT_READ_IOUT_MIN: |
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if (!data->have_iout_min) |
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return -ENXIO; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1293_IOUT_MIN); |
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break; |
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case PMBUS_VIRT_READ_IOUT_MAX: |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1275_PEAK_IOUT); |
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break; |
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case PMBUS_VIRT_READ_VOUT_MAX: |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1275_PEAK_VOUT); |
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break; |
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case PMBUS_VIRT_READ_VIN_MAX: |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1275_PEAK_VIN); |
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break; |
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case PMBUS_VIRT_READ_PIN_MIN: |
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if (!data->have_pin_min) |
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return -ENXIO; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1293_PIN_MIN); |
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break; |
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case PMBUS_VIRT_READ_PIN_MAX: |
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if (!data->have_pin_max) |
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return -ENXIO; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1276_PEAK_PIN); |
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break; |
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case PMBUS_VIRT_READ_TEMP_MAX: |
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if (!data->have_temp_max) |
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return -ENXIO; |
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ret = pmbus_read_word_data(client, 0, 0xff, |
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ADM1278_PEAK_TEMP); |
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break; |
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case PMBUS_VIRT_RESET_IOUT_HISTORY: |
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case PMBUS_VIRT_RESET_VOUT_HISTORY: |
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case PMBUS_VIRT_RESET_VIN_HISTORY: |
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break; |
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case PMBUS_VIRT_RESET_PIN_HISTORY: |
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if (!data->have_pin_max) |
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return -ENXIO; |
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break; |
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case PMBUS_VIRT_RESET_TEMP_HISTORY: |
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if (!data->have_temp_max) |
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return -ENXIO; |
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break; |
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case PMBUS_VIRT_POWER_SAMPLES: |
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if (!data->have_power_sampling) |
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return -ENXIO; |
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ret = adm1275_read_pmon_config(data, client, true); |
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if (ret < 0) |
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break; |
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ret = BIT(ret); |
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break; |
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case PMBUS_VIRT_IN_SAMPLES: |
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case PMBUS_VIRT_CURR_SAMPLES: |
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ret = adm1275_read_pmon_config(data, client, false); |
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if (ret < 0) |
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break; |
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ret = BIT(ret); |
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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 adm1275_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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const struct pmbus_driver_info *info = pmbus_get_driver_info(client); |
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const struct adm1275_data *data = to_adm1275_data(info); |
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int ret; |
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if (page > 0) |
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return -ENXIO; |
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switch (reg) { |
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case PMBUS_IOUT_UC_FAULT_LIMIT: |
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case PMBUS_IOUT_OC_FAULT_LIMIT: |
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ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, |
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word); |
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break; |
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case PMBUS_VIRT_RESET_IOUT_HISTORY: |
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); |
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if (!ret && data->have_iout_min) |
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ret = pmbus_write_word_data(client, 0, |
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ADM1293_IOUT_MIN, 0); |
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break; |
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case PMBUS_VIRT_RESET_VOUT_HISTORY: |
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0); |
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break; |
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case PMBUS_VIRT_RESET_VIN_HISTORY: |
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); |
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break; |
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case PMBUS_VIRT_RESET_PIN_HISTORY: |
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ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); |
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if (!ret && data->have_pin_min) |
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ret = pmbus_write_word_data(client, 0, |
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ADM1293_PIN_MIN, 0); |
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break; |
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case PMBUS_VIRT_RESET_TEMP_HISTORY: |
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ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); |
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break; |
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case PMBUS_VIRT_POWER_SAMPLES: |
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if (!data->have_power_sampling) |
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return -ENXIO; |
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word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); |
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ret = adm1275_write_pmon_config(data, client, true, |
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ilog2(word)); |
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break; |
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case PMBUS_VIRT_IN_SAMPLES: |
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case PMBUS_VIRT_CURR_SAMPLES: |
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word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); |
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ret = adm1275_write_pmon_config(data, client, false, |
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ilog2(word)); |
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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 adm1275_read_byte_data(struct i2c_client *client, int page, 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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const struct adm1275_data *data = to_adm1275_data(info); |
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int mfr_status, ret; |
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if (page > 0) |
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return -ENXIO; |
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switch (reg) { |
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case PMBUS_STATUS_IOUT: |
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ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); |
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if (ret < 0) |
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break; |
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if (!data->have_oc_fault && !data->have_uc_fault) |
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break; |
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mfr_status = pmbus_read_byte_data(client, page, |
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PMBUS_STATUS_MFR_SPECIFIC); |
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if (mfr_status < 0) |
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return mfr_status; |
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if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { |
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ret |= data->have_oc_fault ? |
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PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; |
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} |
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break; |
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case PMBUS_STATUS_VOUT: |
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if (data->have_vout) |
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return -ENODATA; |
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ret = 0; |
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if (data->have_vaux_status) { |
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mfr_status = pmbus_read_byte_data(client, 0, |
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ADM1075_VAUX_STATUS); |
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if (mfr_status < 0) |
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return mfr_status; |
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if (mfr_status & ADM1075_VAUX_OV_WARN) |
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ret |= PB_VOLTAGE_OV_WARNING; |
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if (mfr_status & ADM1075_VAUX_UV_WARN) |
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ret |= PB_VOLTAGE_UV_WARNING; |
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} else if (data->have_mfr_vaux_status) { |
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mfr_status = pmbus_read_byte_data(client, page, |
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PMBUS_STATUS_MFR_SPECIFIC); |
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if (mfr_status < 0) |
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return mfr_status; |
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if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN) |
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ret |= PB_VOLTAGE_OV_WARNING; |
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if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN) |
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ret |= PB_VOLTAGE_UV_WARNING; |
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} |
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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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|
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static const struct i2c_device_id adm1275_id[] = { |
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{ "adm1075", adm1075 }, |
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{ "adm1272", adm1272 }, |
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{ "adm1275", adm1275 }, |
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{ "adm1276", adm1276 }, |
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{ "adm1278", adm1278 }, |
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{ "adm1293", adm1293 }, |
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{ "adm1294", adm1294 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, adm1275_id); |
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|
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static int adm1275_probe(struct i2c_client *client) |
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{ |
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s32 (*config_read_fn)(const struct i2c_client *client, u8 reg); |
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u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; |
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int config, device_config; |
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int ret; |
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struct pmbus_driver_info *info; |
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struct adm1275_data *data; |
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const struct i2c_device_id *mid; |
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const struct coefficients *coefficients; |
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int vindex = -1, voindex = -1, cindex = -1, pindex = -1; |
|
int tindex = -1; |
|
u32 shunt; |
|
|
|
if (!i2c_check_functionality(client->adapter, |
|
I2C_FUNC_SMBUS_READ_BYTE_DATA |
|
| I2C_FUNC_SMBUS_BLOCK_DATA)) |
|
return -ENODEV; |
|
|
|
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "Failed to read Manufacturer ID\n"); |
|
return ret; |
|
} |
|
if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { |
|
dev_err(&client->dev, "Unsupported Manufacturer ID\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "Failed to read Manufacturer Model\n"); |
|
return ret; |
|
} |
|
for (mid = adm1275_id; mid->name[0]; mid++) { |
|
if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) |
|
break; |
|
} |
|
if (!mid->name[0]) { |
|
dev_err(&client->dev, "Unsupported device\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (strcmp(client->name, mid->name) != 0) |
|
dev_notice(&client->dev, |
|
"Device mismatch: Configured %s, detected %s\n", |
|
client->name, mid->name); |
|
|
|
if (mid->driver_data == adm1272 || mid->driver_data == adm1278 || |
|
mid->driver_data == adm1293 || mid->driver_data == adm1294) |
|
config_read_fn = i2c_smbus_read_word_data; |
|
else |
|
config_read_fn = i2c_smbus_read_byte_data; |
|
config = config_read_fn(client, ADM1275_PMON_CONFIG); |
|
if (config < 0) |
|
return config; |
|
|
|
device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG); |
|
if (device_config < 0) |
|
return device_config; |
|
|
|
data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), |
|
GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
if (of_property_read_u32(client->dev.of_node, |
|
"shunt-resistor-micro-ohms", &shunt)) |
|
shunt = 1000; /* 1 mOhm if not set via DT */ |
|
|
|
if (shunt == 0) |
|
return -EINVAL; |
|
|
|
data->id = mid->driver_data; |
|
|
|
info = &data->info; |
|
|
|
info->pages = 1; |
|
info->format[PSC_VOLTAGE_IN] = direct; |
|
info->format[PSC_VOLTAGE_OUT] = direct; |
|
info->format[PSC_CURRENT_OUT] = direct; |
|
info->format[PSC_POWER] = direct; |
|
info->format[PSC_TEMPERATURE] = direct; |
|
info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | |
|
PMBUS_HAVE_SAMPLES; |
|
|
|
info->read_word_data = adm1275_read_word_data; |
|
info->read_byte_data = adm1275_read_byte_data; |
|
info->write_word_data = adm1275_write_word_data; |
|
|
|
switch (data->id) { |
|
case adm1075: |
|
if (device_config & ADM1275_IOUT_WARN2_SELECT) |
|
data->have_oc_fault = true; |
|
else |
|
data->have_uc_fault = true; |
|
data->have_pin_max = true; |
|
data->have_vaux_status = true; |
|
|
|
coefficients = adm1075_coefficients; |
|
vindex = 0; |
|
switch (config & ADM1075_IRANGE_MASK) { |
|
case ADM1075_IRANGE_25: |
|
cindex = 1; |
|
pindex = 3; |
|
break; |
|
case ADM1075_IRANGE_50: |
|
cindex = 2; |
|
pindex = 4; |
|
break; |
|
default: |
|
dev_err(&client->dev, "Invalid input current range"); |
|
break; |
|
} |
|
|
|
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN |
|
| PMBUS_HAVE_STATUS_INPUT; |
|
if (config & ADM1275_VIN_VOUT_SELECT) |
|
info->func[0] |= |
|
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; |
|
break; |
|
case adm1272: |
|
data->have_vout = true; |
|
data->have_pin_max = true; |
|
data->have_temp_max = true; |
|
data->have_power_sampling = true; |
|
|
|
coefficients = adm1272_coefficients; |
|
vindex = (config & ADM1275_VRANGE) ? 1 : 0; |
|
cindex = (config & ADM1272_IRANGE) ? 3 : 2; |
|
/* pindex depends on the combination of the above */ |
|
switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) { |
|
case 0: |
|
default: |
|
pindex = 4; |
|
break; |
|
case ADM1275_VRANGE: |
|
pindex = 5; |
|
break; |
|
case ADM1272_IRANGE: |
|
pindex = 6; |
|
break; |
|
case ADM1275_VRANGE | ADM1272_IRANGE: |
|
pindex = 7; |
|
break; |
|
} |
|
tindex = 8; |
|
|
|
info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | |
|
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; |
|
|
|
/* Enable VOUT if not enabled (it is disabled by default) */ |
|
if (!(config & ADM1278_VOUT_EN)) { |
|
config |= ADM1278_VOUT_EN; |
|
ret = i2c_smbus_write_byte_data(client, |
|
ADM1275_PMON_CONFIG, |
|
config); |
|
if (ret < 0) { |
|
dev_err(&client->dev, |
|
"Failed to enable VOUT monitoring\n"); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
if (config & ADM1278_TEMP1_EN) |
|
info->func[0] |= |
|
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; |
|
if (config & ADM1278_VIN_EN) |
|
info->func[0] |= PMBUS_HAVE_VIN; |
|
break; |
|
case adm1275: |
|
if (device_config & ADM1275_IOUT_WARN2_SELECT) |
|
data->have_oc_fault = true; |
|
else |
|
data->have_uc_fault = true; |
|
data->have_vout = true; |
|
|
|
coefficients = adm1275_coefficients; |
|
vindex = (config & ADM1275_VRANGE) ? 0 : 1; |
|
cindex = 2; |
|
|
|
if (config & ADM1275_VIN_VOUT_SELECT) |
|
info->func[0] |= |
|
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; |
|
else |
|
info->func[0] |= |
|
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; |
|
break; |
|
case adm1276: |
|
if (device_config & ADM1275_IOUT_WARN2_SELECT) |
|
data->have_oc_fault = true; |
|
else |
|
data->have_uc_fault = true; |
|
data->have_vout = true; |
|
data->have_pin_max = true; |
|
|
|
coefficients = adm1276_coefficients; |
|
vindex = (config & ADM1275_VRANGE) ? 0 : 1; |
|
cindex = 2; |
|
pindex = (config & ADM1275_VRANGE) ? 3 : 4; |
|
|
|
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN |
|
| PMBUS_HAVE_STATUS_INPUT; |
|
if (config & ADM1275_VIN_VOUT_SELECT) |
|
info->func[0] |= |
|
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; |
|
break; |
|
case adm1278: |
|
data->have_vout = true; |
|
data->have_pin_max = true; |
|
data->have_temp_max = true; |
|
data->have_power_sampling = true; |
|
|
|
coefficients = adm1278_coefficients; |
|
vindex = 0; |
|
cindex = 1; |
|
pindex = 2; |
|
tindex = 3; |
|
|
|
info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | |
|
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | |
|
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; |
|
|
|
/* Enable VOUT & TEMP1 if not enabled (disabled by default) */ |
|
if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) != |
|
(ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) { |
|
config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN; |
|
ret = i2c_smbus_write_byte_data(client, |
|
ADM1275_PMON_CONFIG, |
|
config); |
|
if (ret < 0) { |
|
dev_err(&client->dev, |
|
"Failed to enable VOUT monitoring\n"); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
if (config & ADM1278_VIN_EN) |
|
info->func[0] |= PMBUS_HAVE_VIN; |
|
break; |
|
case adm1293: |
|
case adm1294: |
|
data->have_iout_min = true; |
|
data->have_pin_min = true; |
|
data->have_pin_max = true; |
|
data->have_mfr_vaux_status = true; |
|
data->have_power_sampling = true; |
|
|
|
coefficients = adm1293_coefficients; |
|
|
|
voindex = 0; |
|
switch (config & ADM1293_VIN_SEL_MASK) { |
|
case ADM1293_VIN_SEL_012: /* 1.2V */ |
|
vindex = 0; |
|
break; |
|
case ADM1293_VIN_SEL_074: /* 7.4V */ |
|
vindex = 1; |
|
break; |
|
case ADM1293_VIN_SEL_210: /* 21V */ |
|
vindex = 2; |
|
break; |
|
default: /* disabled */ |
|
break; |
|
} |
|
|
|
switch (config & ADM1293_IRANGE_MASK) { |
|
case ADM1293_IRANGE_25: |
|
cindex = 3; |
|
break; |
|
case ADM1293_IRANGE_50: |
|
cindex = 4; |
|
break; |
|
case ADM1293_IRANGE_100: |
|
cindex = 5; |
|
break; |
|
case ADM1293_IRANGE_200: |
|
cindex = 6; |
|
break; |
|
} |
|
|
|
if (vindex >= 0) |
|
pindex = 7 + vindex * 4 + (cindex - 3); |
|
|
|
if (config & ADM1293_VAUX_EN) |
|
info->func[0] |= |
|
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; |
|
|
|
info->func[0] |= PMBUS_HAVE_PIN | |
|
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; |
|
|
|
break; |
|
default: |
|
dev_err(&client->dev, "Unsupported device\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (voindex < 0) |
|
voindex = vindex; |
|
if (vindex >= 0) { |
|
info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m; |
|
info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b; |
|
info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R; |
|
} |
|
if (voindex >= 0) { |
|
info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m; |
|
info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b; |
|
info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R; |
|
} |
|
if (cindex >= 0) { |
|
/* Scale current with sense resistor value */ |
|
info->m[PSC_CURRENT_OUT] = |
|
coefficients[cindex].m * shunt / 1000; |
|
info->b[PSC_CURRENT_OUT] = coefficients[cindex].b; |
|
info->R[PSC_CURRENT_OUT] = coefficients[cindex].R; |
|
} |
|
if (pindex >= 0) { |
|
info->m[PSC_POWER] = |
|
coefficients[pindex].m * shunt / 1000; |
|
info->b[PSC_POWER] = coefficients[pindex].b; |
|
info->R[PSC_POWER] = coefficients[pindex].R; |
|
} |
|
if (tindex >= 0) { |
|
info->m[PSC_TEMPERATURE] = coefficients[tindex].m; |
|
info->b[PSC_TEMPERATURE] = coefficients[tindex].b; |
|
info->R[PSC_TEMPERATURE] = coefficients[tindex].R; |
|
} |
|
|
|
return pmbus_do_probe(client, info); |
|
} |
|
|
|
static struct i2c_driver adm1275_driver = { |
|
.driver = { |
|
.name = "adm1275", |
|
}, |
|
.probe_new = adm1275_probe, |
|
.id_table = adm1275_id, |
|
}; |
|
|
|
module_i2c_driver(adm1275_driver); |
|
|
|
MODULE_AUTHOR("Guenter Roeck"); |
|
MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); |
|
MODULE_LICENSE("GPL");
|
|
|