^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for the Texas Instruments / Burr Brown INA209
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Bidirectional Current/Power Monitor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Derived from Ira W. Snyder's original driver submission
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2008 Paul Hays <Paul.Hays@cattail.ca>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2008-2009 Ira W. Snyder <iws@ovro.caltech.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Aligned with ina2xx driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Copyright (C) 2012 Lothar Felten <l-felten@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Thanks to Jan Volkering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * https://www.ti.com/lit/gpn/ina209
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/platform_data/ina2xx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* register definitions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define INA209_CONFIGURATION 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define INA209_STATUS 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define INA209_STATUS_MASK 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define INA209_SHUNT_VOLTAGE 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define INA209_BUS_VOLTAGE 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define INA209_POWER 0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define INA209_CURRENT 0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define INA209_SHUNT_VOLTAGE_POS_PEAK 0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define INA209_SHUNT_VOLTAGE_NEG_PEAK 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define INA209_BUS_VOLTAGE_MAX_PEAK 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define INA209_BUS_VOLTAGE_MIN_PEAK 0x0a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define INA209_POWER_PEAK 0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define INA209_SHUNT_VOLTAGE_POS_WARN 0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define INA209_SHUNT_VOLTAGE_NEG_WARN 0x0d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define INA209_POWER_WARN 0x0e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define INA209_BUS_VOLTAGE_OVER_WARN 0x0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define INA209_BUS_VOLTAGE_UNDER_WARN 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define INA209_POWER_OVER_LIMIT 0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define INA209_BUS_VOLTAGE_OVER_LIMIT 0x12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define INA209_BUS_VOLTAGE_UNDER_LIMIT 0x13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define INA209_CRITICAL_DAC_POS 0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define INA209_CRITICAL_DAC_NEG 0x15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define INA209_CALIBRATION 0x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define INA209_REGISTERS 0x17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define INA209_CONFIG_DEFAULT 0x3c47 /* PGA=8, full range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define INA209_SHUNT_DEFAULT 10000 /* uOhm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct ina209_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) bool valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) unsigned long last_updated; /* in jiffies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u16 regs[INA209_REGISTERS]; /* All chip registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u16 config_orig; /* Original configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u16 calibration_orig; /* Original calibration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) u16 update_interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static struct ina209_data *ina209_update_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct ina209_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct ina209_data *ret = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) s32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!data->valid ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) time_after(jiffies, data->last_updated + data->update_interval)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) for (i = 0; i < ARRAY_SIZE(data->regs); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) val = i2c_smbus_read_word_swapped(client, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (val < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ret = ERR_PTR(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) data->regs[i] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) data->last_updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) data->valid = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) abort:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * Read a value from a device register and convert it to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * appropriate sysfs units
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static long ina209_from_reg(const u8 reg, const u16 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) case INA209_SHUNT_VOLTAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) case INA209_SHUNT_VOLTAGE_POS_PEAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) case INA209_SHUNT_VOLTAGE_NEG_PEAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) case INA209_SHUNT_VOLTAGE_POS_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) case INA209_SHUNT_VOLTAGE_NEG_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /* LSB=10 uV. Convert to mV. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return DIV_ROUND_CLOSEST((s16)val, 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) case INA209_BUS_VOLTAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) case INA209_BUS_VOLTAGE_MAX_PEAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) case INA209_BUS_VOLTAGE_MIN_PEAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) case INA209_BUS_VOLTAGE_OVER_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) case INA209_BUS_VOLTAGE_UNDER_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) case INA209_BUS_VOLTAGE_OVER_LIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case INA209_BUS_VOLTAGE_UNDER_LIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* LSB=4 mV, last 3 bits unused */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return (val >> 3) * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case INA209_CRITICAL_DAC_POS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* LSB=1 mV, in the upper 8 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return val >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) case INA209_CRITICAL_DAC_NEG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* LSB=1 mV, in the upper 8 bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return -1 * (val >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) case INA209_POWER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) case INA209_POWER_PEAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) case INA209_POWER_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) case INA209_POWER_OVER_LIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* LSB=20 mW. Convert to uW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return val * 20 * 1000L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) case INA209_CURRENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /* LSB=1 mA (selected). Is in mA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return (s16)val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* programmer goofed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * Take a value and convert it to register format, clamping the value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * to the appropriate range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int ina209_to_reg(u8 reg, u16 old, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) case INA209_SHUNT_VOLTAGE_POS_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) case INA209_SHUNT_VOLTAGE_NEG_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) /* Limit to +- 320 mV, 10 uV LSB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return clamp_val(val, -320, 320) * 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) case INA209_BUS_VOLTAGE_OVER_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) case INA209_BUS_VOLTAGE_UNDER_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) case INA209_BUS_VOLTAGE_OVER_LIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) case INA209_BUS_VOLTAGE_UNDER_LIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * Limit to 0-32000 mV, 4 mV LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * The last three bits aren't part of the value, but we'll
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * preserve them in their original state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return (DIV_ROUND_CLOSEST(clamp_val(val, 0, 32000), 4) << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) | (old & 0x7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) case INA209_CRITICAL_DAC_NEG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * Limit to -255-0 mV, 1 mV LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Convert the value to a positive value for the register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * The value lives in the top 8 bits only, be careful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * and keep original value of other bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return (clamp_val(-val, 0, 255) << 8) | (old & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) case INA209_CRITICAL_DAC_POS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * Limit to 0-255 mV, 1 mV LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * The value lives in the top 8 bits only, be careful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * and keep original value of other bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return (clamp_val(val, 0, 255) << 8) | (old & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) case INA209_POWER_WARN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) case INA209_POWER_OVER_LIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /* 20 mW LSB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return DIV_ROUND_CLOSEST(val, 20 * 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /* Other registers are read-only, return access error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static int ina209_interval_from_reg(u16 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return 68 >> (15 - ((reg >> 3) & 0x0f));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static u16 ina209_reg_from_interval(u16 config, long interval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) int i, adc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (interval <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) adc = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) adc = 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) for (i = 34 + 34 / 2; i; i >>= 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (i < interval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) adc--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return (config & 0xf807) | (adc << 3) | (adc << 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static ssize_t ina209_interval_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct device_attribute *da,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct ina209_data *data = ina209_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) u16 regval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) ret = kstrtol(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) regval = ina209_reg_from_interval(data->regs[INA209_CONFIGURATION],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) i2c_smbus_write_word_swapped(data->client, INA209_CONFIGURATION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) regval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) data->regs[INA209_CONFIGURATION] = regval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) data->update_interval = ina209_interval_from_reg(regval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static ssize_t ina209_interval_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct device_attribute *da, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct ina209_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return snprintf(buf, PAGE_SIZE, "%d\n", data->update_interval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * History is reset by writing 1 into bit 0 of the respective peak register.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * Since more than one peak register may be affected by the scope of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * reset_history attribute write, use a bit mask in attr->index to identify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * which registers are affected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static u16 ina209_reset_history_regs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) INA209_SHUNT_VOLTAGE_POS_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) INA209_SHUNT_VOLTAGE_NEG_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) INA209_BUS_VOLTAGE_MAX_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) INA209_BUS_VOLTAGE_MIN_PEAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) INA209_POWER_PEAK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static ssize_t ina209_history_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) struct device_attribute *da,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct ina209_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) u32 mask = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) ret = kstrtol(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) for (i = 0; i < ARRAY_SIZE(ina209_reset_history_regs); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (mask & (1 << i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) i2c_smbus_write_word_swapped(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) ina209_reset_history_regs[i], 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) data->valid = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static ssize_t ina209_value_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct device_attribute *da,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) struct ina209_data *data = ina209_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int reg = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) ret = kstrtol(buf, 10, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) ret = ina209_to_reg(reg, data->regs[reg], val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) count = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) i2c_smbus_write_word_swapped(data->client, reg, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) data->regs[reg] = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) abort:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static ssize_t ina209_value_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct device_attribute *da, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct ina209_data *data = ina209_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) val = ina209_from_reg(attr->index, data->regs[attr->index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return snprintf(buf, PAGE_SIZE, "%ld\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static ssize_t ina209_alarm_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct device_attribute *da, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct ina209_data *data = ina209_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) const unsigned int mask = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (IS_ERR(data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return PTR_ERR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) status = data->regs[INA209_STATUS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * All alarms are in the INA209_STATUS register. To avoid a long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * switch statement, the mask is passed in attr->index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) return snprintf(buf, PAGE_SIZE, "%u\n", !!(status & mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /* Shunt voltage, history, limits, alarms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) static SENSOR_DEVICE_ATTR_RO(in0_input, ina209_value, INA209_SHUNT_VOLTAGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static SENSOR_DEVICE_ATTR_RO(in0_input_highest, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) INA209_SHUNT_VOLTAGE_POS_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static SENSOR_DEVICE_ATTR_RO(in0_input_lowest, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) INA209_SHUNT_VOLTAGE_NEG_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static SENSOR_DEVICE_ATTR_WO(in0_reset_history, ina209_history,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) (1 << 0) | (1 << 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) static SENSOR_DEVICE_ATTR_RW(in0_max, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) INA209_SHUNT_VOLTAGE_POS_WARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) static SENSOR_DEVICE_ATTR_RW(in0_min, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) INA209_SHUNT_VOLTAGE_NEG_WARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) static SENSOR_DEVICE_ATTR_RW(in0_crit_max, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) INA209_CRITICAL_DAC_POS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static SENSOR_DEVICE_ATTR_RW(in0_crit_min, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) INA209_CRITICAL_DAC_NEG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static SENSOR_DEVICE_ATTR_RO(in0_min_alarm, ina209_alarm, 1 << 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) static SENSOR_DEVICE_ATTR_RO(in0_max_alarm, ina209_alarm, 1 << 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) static SENSOR_DEVICE_ATTR_RO(in0_crit_min_alarm, ina209_alarm, 1 << 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) static SENSOR_DEVICE_ATTR_RO(in0_crit_max_alarm, ina209_alarm, 1 << 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* Bus voltage, history, limits, alarms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static SENSOR_DEVICE_ATTR_RO(in1_input, ina209_value, INA209_BUS_VOLTAGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static SENSOR_DEVICE_ATTR_RO(in1_input_highest, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) INA209_BUS_VOLTAGE_MAX_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static SENSOR_DEVICE_ATTR_RO(in1_input_lowest, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) INA209_BUS_VOLTAGE_MIN_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static SENSOR_DEVICE_ATTR_WO(in1_reset_history, ina209_history,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) (1 << 2) | (1 << 3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) static SENSOR_DEVICE_ATTR_RW(in1_max, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) INA209_BUS_VOLTAGE_OVER_WARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static SENSOR_DEVICE_ATTR_RW(in1_min, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) INA209_BUS_VOLTAGE_UNDER_WARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static SENSOR_DEVICE_ATTR_RW(in1_crit_max, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) INA209_BUS_VOLTAGE_OVER_LIMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static SENSOR_DEVICE_ATTR_RW(in1_crit_min, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) INA209_BUS_VOLTAGE_UNDER_LIMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static SENSOR_DEVICE_ATTR_RO(in1_min_alarm, ina209_alarm, 1 << 14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static SENSOR_DEVICE_ATTR_RO(in1_max_alarm, ina209_alarm, 1 << 15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static SENSOR_DEVICE_ATTR_RO(in1_crit_min_alarm, ina209_alarm, 1 << 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static SENSOR_DEVICE_ATTR_RO(in1_crit_max_alarm, ina209_alarm, 1 << 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) /* Power */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) static SENSOR_DEVICE_ATTR_RO(power1_input, ina209_value, INA209_POWER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static SENSOR_DEVICE_ATTR_RO(power1_input_highest, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) INA209_POWER_PEAK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) static SENSOR_DEVICE_ATTR_WO(power1_reset_history, ina209_history, 1 << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) static SENSOR_DEVICE_ATTR_RW(power1_max, ina209_value, INA209_POWER_WARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) static SENSOR_DEVICE_ATTR_RW(power1_crit, ina209_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) INA209_POWER_OVER_LIMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) static SENSOR_DEVICE_ATTR_RO(power1_max_alarm, ina209_alarm, 1 << 13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static SENSOR_DEVICE_ATTR_RO(power1_crit_alarm, ina209_alarm, 1 << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) /* Current */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static SENSOR_DEVICE_ATTR_RO(curr1_input, ina209_value, INA209_CURRENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) static SENSOR_DEVICE_ATTR_RW(update_interval, ina209_interval, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * Finally, construct an array of pointers to members of the above objects,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * as required for sysfs_create_group()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) static struct attribute *ina209_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) &sensor_dev_attr_in0_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) &sensor_dev_attr_in0_input_highest.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) &sensor_dev_attr_in0_input_lowest.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) &sensor_dev_attr_in0_reset_history.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) &sensor_dev_attr_in0_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) &sensor_dev_attr_in0_min.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) &sensor_dev_attr_in0_crit_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) &sensor_dev_attr_in0_crit_min.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) &sensor_dev_attr_in0_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) &sensor_dev_attr_in0_min_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) &sensor_dev_attr_in0_crit_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) &sensor_dev_attr_in0_crit_min_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) &sensor_dev_attr_in1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) &sensor_dev_attr_in1_input_highest.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) &sensor_dev_attr_in1_input_lowest.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) &sensor_dev_attr_in1_reset_history.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) &sensor_dev_attr_in1_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) &sensor_dev_attr_in1_min.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) &sensor_dev_attr_in1_crit_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) &sensor_dev_attr_in1_crit_min.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) &sensor_dev_attr_in1_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) &sensor_dev_attr_in1_min_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) &sensor_dev_attr_in1_crit_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) &sensor_dev_attr_in1_crit_min_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) &sensor_dev_attr_power1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) &sensor_dev_attr_power1_input_highest.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) &sensor_dev_attr_power1_reset_history.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) &sensor_dev_attr_power1_max.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) &sensor_dev_attr_power1_crit.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) &sensor_dev_attr_power1_max_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) &sensor_dev_attr_power1_crit_alarm.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) &sensor_dev_attr_curr1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) &sensor_dev_attr_update_interval.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) ATTRIBUTE_GROUPS(ina209);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) static void ina209_restore_conf(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct ina209_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) /* Restore initial configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) data->config_orig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) i2c_smbus_write_word_swapped(client, INA209_CALIBRATION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) data->calibration_orig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static int ina209_init_client(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct ina209_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) struct ina2xx_platform_data *pdata = dev_get_platdata(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) u32 shunt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) int reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) reg = i2c_smbus_read_word_swapped(client, INA209_CALIBRATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (reg < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) data->calibration_orig = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) reg = i2c_smbus_read_word_swapped(client, INA209_CONFIGURATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (reg < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) data->config_orig = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (pdata->shunt_uohms <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) shunt = pdata->shunt_uohms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) } else if (!of_property_read_u32(client->dev.of_node, "shunt-resistor",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) &shunt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (shunt == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) shunt = data->calibration_orig ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 40960000 / data->calibration_orig : INA209_SHUNT_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) INA209_CONFIG_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) data->update_interval = ina209_interval_from_reg(INA209_CONFIG_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * Calibrate current LSB to 1mA. Shunt is in uOhms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * See equation 13 in datasheet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) i2c_smbus_write_word_swapped(client, INA209_CALIBRATION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) clamp_val(40960000 / shunt, 1, 65535));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* Clear status register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) i2c_smbus_read_word_swapped(client, INA209_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) static int ina209_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) struct i2c_adapter *adapter = client->adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct ina209_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) i2c_set_clientdata(client, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) mutex_init(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) ret = ina209_init_client(client, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) client->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) data, ina209_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) if (IS_ERR(hwmon_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) ret = PTR_ERR(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) goto out_restore_conf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) out_restore_conf:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) ina209_restore_conf(client, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) static int ina209_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct ina209_data *data = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) ina209_restore_conf(client, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) static const struct i2c_device_id ina209_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) { "ina209", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) MODULE_DEVICE_TABLE(i2c, ina209_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) static const struct of_device_id __maybe_unused ina209_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) { .compatible = "ti,ina209" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) MODULE_DEVICE_TABLE(of, ina209_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /* This is the driver that will be inserted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) static struct i2c_driver ina209_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) .class = I2C_CLASS_HWMON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) .name = "ina209",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) .of_match_table = of_match_ptr(ina209_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) .probe_new = ina209_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) .remove = ina209_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) .id_table = ina209_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) module_i2c_driver(ina209_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) MODULE_AUTHOR("Ira W. Snyder <iws@ovro.caltech.edu>, Paul Hays <Paul.Hays@cattail.ca>, Guenter Roeck <linux@roeck-us.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) MODULE_DESCRIPTION("INA209 driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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