845 lines
23 KiB
C
845 lines
23 KiB
C
// 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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#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);
|
|
if (mfr_status < 0)
|
|
return mfr_status;
|
|
if (mfr_status & ADM1075_VAUX_OV_WARN)
|
|
ret |= PB_VOLTAGE_OV_WARNING;
|
|
if (mfr_status & ADM1075_VAUX_UV_WARN)
|
|
ret |= PB_VOLTAGE_UV_WARNING;
|
|
} else if (data->have_mfr_vaux_status) {
|
|
mfr_status = pmbus_read_byte_data(client, page,
|
|
PMBUS_STATUS_MFR_SPECIFIC);
|
|
if (mfr_status < 0)
|
|
return mfr_status;
|
|
if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
|
|
ret |= PB_VOLTAGE_OV_WARNING;
|
|
if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
|
|
ret |= PB_VOLTAGE_UV_WARNING;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -ENODATA;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const struct i2c_device_id adm1275_id[] = {
|
|
{ "adm1075", adm1075 },
|
|
{ "adm1272", adm1272 },
|
|
{ "adm1275", adm1275 },
|
|
{ "adm1276", adm1276 },
|
|
{ "adm1278", adm1278 },
|
|
{ "adm1293", adm1293 },
|
|
{ "adm1294", adm1294 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, adm1275_id);
|
|
|
|
static int adm1275_probe(struct i2c_client *client)
|
|
{
|
|
s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
|
|
u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
|
|
int config, device_config;
|
|
int ret;
|
|
struct pmbus_driver_info *info;
|
|
struct adm1275_data *data;
|
|
const struct i2c_device_id *mid;
|
|
const struct coefficients *coefficients;
|
|
int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
|
|
int tindex = -1;
|
|
u32 shunt;
|
|
u32 avg;
|
|
|
|
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 |
|
|
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 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_word_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 (data->have_power_sampling &&
|
|
of_property_read_u32(client->dev.of_node,
|
|
"adi,power-sample-average", &avg) == 0) {
|
|
if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
|
|
BIT(__fls(avg)) != avg) {
|
|
dev_err(&client->dev,
|
|
"Invalid number of power samples");
|
|
return -EINVAL;
|
|
}
|
|
ret = adm1275_write_pmon_config(data, client, true,
|
|
ilog2(avg));
|
|
if (ret < 0) {
|
|
dev_err(&client->dev,
|
|
"Setting power sample averaging failed with error %d",
|
|
ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (of_property_read_u32(client->dev.of_node,
|
|
"adi,volt-curr-sample-average", &avg) == 0) {
|
|
if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
|
|
BIT(__fls(avg)) != avg) {
|
|
dev_err(&client->dev,
|
|
"Invalid number of voltage/current samples");
|
|
return -EINVAL;
|
|
}
|
|
ret = adm1275_write_pmon_config(data, client, false,
|
|
ilog2(avg));
|
|
if (ret < 0) {
|
|
dev_err(&client->dev,
|
|
"Setting voltage and current sample averaging failed with error %d",
|
|
ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
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");
|
|
MODULE_IMPORT_NS(PMBUS);
|