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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
* and Digital Power Monitor
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2018 Guenter Roeck
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/bitops.h>
#include <linux/bitfield.h>
#include <linux/log2.h>
#include "pmbus.h"
enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
#define ADM1275_PEAK_IOUT 0xd0
#define ADM1275_PEAK_VIN 0xd1
#define ADM1275_PEAK_VOUT 0xd2
#define ADM1275_PMON_CONFIG 0xd4
#define ADM1275_VIN_VOUT_SELECT BIT(6)
#define ADM1275_VRANGE BIT(5)
#define ADM1075_IRANGE_50 BIT(4)
#define ADM1075_IRANGE_25 BIT(3)
#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
#define ADM1272_IRANGE BIT(0)
#define ADM1278_TEMP1_EN BIT(3)
#define ADM1278_VIN_EN BIT(2)
#define ADM1278_VOUT_EN BIT(1)
#define ADM1293_IRANGE_25 0
#define ADM1293_IRANGE_50 BIT(6)
#define ADM1293_IRANGE_100 BIT(7)
#define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
#define ADM1293_VIN_SEL_012 BIT(2)
#define ADM1293_VIN_SEL_074 BIT(3)
#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
#define ADM1293_VAUX_EN BIT(1)
#define ADM1278_PEAK_TEMP 0xd7
#define ADM1275_IOUT_WARN2_LIMIT 0xd7
#define ADM1275_DEVICE_CONFIG 0xd8
#define ADM1275_IOUT_WARN2_SELECT BIT(4)
#define ADM1276_PEAK_PIN 0xda
#define ADM1075_READ_VAUX 0xdd
#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
#define ADM1293_IOUT_MIN 0xe3
#define ADM1293_PIN_MIN 0xe4
#define ADM1075_VAUX_STATUS 0xf6
#define ADM1075_VAUX_OV_WARN BIT(7)
#define ADM1075_VAUX_UV_WARN BIT(6)
#define ADM1275_VI_AVG_SHIFT 0
#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
ADM1275_VI_AVG_SHIFT)
#define ADM1275_SAMPLES_AVG_MAX 128
#define ADM1278_PWR_AVG_SHIFT 11
#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
ADM1278_PWR_AVG_SHIFT)
#define ADM1278_VI_AVG_SHIFT 8
#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
ADM1278_VI_AVG_SHIFT)
struct adm1275_data {
int id;
bool have_oc_fault;
bool have_uc_fault;
bool have_vout;
bool have_vaux_status;
bool have_mfr_vaux_status;
bool have_iout_min;
bool have_pin_min;
bool have_pin_max;
bool have_temp_max;
bool have_power_sampling;
struct pmbus_driver_info info;
};
#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
struct coefficients {
s16 m;
s16 b;
s16 R;
};
static const struct coefficients adm1075_coefficients[] = {
[0] = { 27169, 0, -1 }, /* voltage */
[1] = { 806, 20475, -1 }, /* current, irange25 */
[2] = { 404, 20475, -1 }, /* current, irange50 */
[3] = { 8549, 0, -1 }, /* power, irange25 */
[4] = { 4279, 0, -1 }, /* power, irange50 */
};
static const struct coefficients adm1272_coefficients[] = {
[0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
[1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
[2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
[3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
[4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
[5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
[6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
[7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
[8] = { 42, 31871, -1 }, /* temperature */
};
static const struct coefficients adm1275_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
};
static const struct coefficients adm1276_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
[3] = { 6043, 0, -2 }, /* power, vrange set */
[4] = { 2115, 0, -1 }, /* power, vrange not set */
};
static const struct coefficients adm1278_coefficients[] = {
[0] = { 19599, 0, -2 }, /* voltage */
[1] = { 800, 20475, -1 }, /* current */
[2] = { 6123, 0, -2 }, /* power */
[3] = { 42, 31880, -1 }, /* temperature */
};
static const struct coefficients adm1293_coefficients[] = {
[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
[2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
[3] = { 8000, -100, -2 }, /* current, irange25 */
[4] = { 4000, -100, -2 }, /* current, irange50 */
[5] = { 20000, -1000, -3 }, /* current, irange100 */
[6] = { 10000, -1000, -3 }, /* current, irange200 */
[7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
[8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
[9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
[10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
[11] = { 173
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