^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 Linear Technology LTC2990 power monitor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 Topic Embedded Products
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Mike Looijmans <mike.looijmans@topic.nl>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/property.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define LTC2990_STATUS 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define LTC2990_CONTROL 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define LTC2990_TRIGGER 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define LTC2990_TINT_MSB 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define LTC2990_V1_MSB 0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define LTC2990_V2_MSB 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define LTC2990_V3_MSB 0x0A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define LTC2990_V4_MSB 0x0C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define LTC2990_VCC_MSB 0x0E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define LTC2990_IN0 BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define LTC2990_IN1 BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define LTC2990_IN2 BIT(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define LTC2990_IN3 BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define LTC2990_IN4 BIT(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define LTC2990_CURR1 BIT(5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define LTC2990_CURR2 BIT(6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define LTC2990_TEMP1 BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define LTC2990_TEMP2 BIT(8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define LTC2990_TEMP3 BIT(9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define LTC2990_NONE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define LTC2990_ALL GENMASK(9, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define LTC2990_MODE0_SHIFT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define LTC2990_MODE0_MASK GENMASK(2, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define LTC2990_MODE1_SHIFT 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define LTC2990_MODE1_MASK GENMASK(1, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /* Enabled measurements for mode bits 2..0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static const int ltc2990_attrs_ena_0[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) LTC2990_IN1 | LTC2990_IN2 | LTC2990_TEMP3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) LTC2990_CURR1 | LTC2990_TEMP3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) LTC2990_CURR1 | LTC2990_IN3 | LTC2990_IN4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) LTC2990_TEMP2 | LTC2990_IN3 | LTC2990_IN4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) LTC2990_TEMP2 | LTC2990_CURR2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) LTC2990_TEMP2 | LTC2990_TEMP3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) LTC2990_CURR1 | LTC2990_CURR2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) LTC2990_IN1 | LTC2990_IN2 | LTC2990_IN3 | LTC2990_IN4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* Enabled measurements for mode bits 4..3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static const int ltc2990_attrs_ena_1[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) LTC2990_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) LTC2990_TEMP2 | LTC2990_IN1 | LTC2990_CURR1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) LTC2990_TEMP3 | LTC2990_IN3 | LTC2990_CURR2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) LTC2990_ALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct ltc2990_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct i2c_client *i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u32 mode[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* Return the converted value from the given register in uV or mC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int ltc2990_get_value(struct i2c_client *i2c, int index, int *result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) u8 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) switch (index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) case LTC2990_IN0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) reg = LTC2990_VCC_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) case LTC2990_IN1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) case LTC2990_CURR1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) case LTC2990_TEMP2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) reg = LTC2990_V1_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) case LTC2990_IN2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) reg = LTC2990_V2_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) case LTC2990_IN3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) case LTC2990_CURR2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) case LTC2990_TEMP3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) reg = LTC2990_V3_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) case LTC2990_IN4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) reg = LTC2990_V4_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) case LTC2990_TEMP1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) reg = LTC2990_TINT_MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -EINVAL;
^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) val = i2c_smbus_read_word_swapped(i2c, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (unlikely(val < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) switch (index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) case LTC2990_TEMP1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) case LTC2990_TEMP2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) case LTC2990_TEMP3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* temp, 0.0625 degrees/LSB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) *result = sign_extend32(val, 12) * 1000 / 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) case LTC2990_CURR1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) case LTC2990_CURR2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* Vx-Vy, 19.42uV/LSB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) *result = sign_extend32(val, 14) * 1942 / 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) case LTC2990_IN0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* Vcc, 305.18uV/LSB, 2.5V offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) *result = sign_extend32(val, 14) * 30518 / (100 * 1000) + 2500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) case LTC2990_IN1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case LTC2990_IN2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) case LTC2990_IN3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) case LTC2990_IN4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* Vx, 305.18uV/LSB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) *result = sign_extend32(val, 14) * 30518 / (100 * 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return -EINVAL; /* won't happen, keep compiler happy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static ssize_t ltc2990_value_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct device_attribute *da, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct ltc2990_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ret = ltc2990_get_value(data->i2c, attr->index, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (unlikely(ret < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return snprintf(buf, PAGE_SIZE, "%d\n", value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static umode_t ltc2990_attrs_visible(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct attribute *a, int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct device *dev = container_of(kobj, struct device, kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct ltc2990_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct device_attribute *da =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) container_of(a, struct device_attribute, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int attrs_mask = LTC2990_IN0 | LTC2990_TEMP1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) (ltc2990_attrs_ena_0[data->mode[0]] &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) ltc2990_attrs_ena_1[data->mode[1]]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (attr->index & attrs_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return a->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static SENSOR_DEVICE_ATTR_RO(temp1_input, ltc2990_value, LTC2990_TEMP1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static SENSOR_DEVICE_ATTR_RO(temp2_input, ltc2990_value, LTC2990_TEMP2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static SENSOR_DEVICE_ATTR_RO(temp3_input, ltc2990_value, LTC2990_TEMP3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static SENSOR_DEVICE_ATTR_RO(curr1_input, ltc2990_value, LTC2990_CURR1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static SENSOR_DEVICE_ATTR_RO(curr2_input, ltc2990_value, LTC2990_CURR2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static SENSOR_DEVICE_ATTR_RO(in0_input, ltc2990_value, LTC2990_IN0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static SENSOR_DEVICE_ATTR_RO(in1_input, ltc2990_value, LTC2990_IN1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static SENSOR_DEVICE_ATTR_RO(in2_input, ltc2990_value, LTC2990_IN2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static SENSOR_DEVICE_ATTR_RO(in3_input, ltc2990_value, LTC2990_IN3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static SENSOR_DEVICE_ATTR_RO(in4_input, ltc2990_value, LTC2990_IN4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static struct attribute *ltc2990_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) &sensor_dev_attr_temp1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) &sensor_dev_attr_temp2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) &sensor_dev_attr_temp3_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) &sensor_dev_attr_curr1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) &sensor_dev_attr_curr2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) &sensor_dev_attr_in0_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) &sensor_dev_attr_in1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) &sensor_dev_attr_in2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) &sensor_dev_attr_in3_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) &sensor_dev_attr_in4_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static const struct attribute_group ltc2990_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .attrs = ltc2990_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) .is_visible = ltc2990_attrs_visible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) __ATTRIBUTE_GROUPS(ltc2990);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static int ltc2990_i2c_probe(struct i2c_client *i2c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct ltc2990_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) I2C_FUNC_SMBUS_WORD_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) data = devm_kzalloc(&i2c->dev, sizeof(struct ltc2990_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (unlikely(!data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) data->i2c = i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (dev_fwnode(&i2c->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) ret = device_property_read_u32_array(&i2c->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) "lltc,meas-mode",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) data->mode, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (data->mode[0] & ~LTC2990_MODE0_MASK ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) data->mode[1] & ~LTC2990_MODE1_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) ret = i2c_smbus_read_byte_data(i2c, LTC2990_CONTROL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) data->mode[0] = ret >> LTC2990_MODE0_SHIFT & LTC2990_MODE0_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) data->mode[1] = ret >> LTC2990_MODE1_SHIFT & LTC2990_MODE1_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Setup continuous mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) ret = i2c_smbus_write_byte_data(i2c, LTC2990_CONTROL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) data->mode[0] << LTC2990_MODE0_SHIFT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) data->mode[1] << LTC2990_MODE1_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) dev_err(&i2c->dev, "Error: Failed to set control mode.\n");
^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) /* Trigger once to start continuous conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) ret = i2c_smbus_write_byte_data(i2c, LTC2990_TRIGGER, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) dev_err(&i2c->dev, "Error: Failed to start acquisition.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) hwmon_dev = devm_hwmon_device_register_with_groups(&i2c->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) i2c->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) ltc2990_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static const struct i2c_device_id ltc2990_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) { "ltc2990", 0 },
^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) MODULE_DEVICE_TABLE(i2c, ltc2990_i2c_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static struct i2c_driver ltc2990_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) .name = "ltc2990",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) .probe_new = ltc2990_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) .id_table = ltc2990_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) module_i2c_driver(ltc2990_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) MODULE_DESCRIPTION("LTC2990 Sensor Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) MODULE_AUTHOR("Topic Embedded Products");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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