^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) * drivers/hwmon/wm831x-hwmon.c - Wolfson Microelectronics WM831x PMIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * hardware monitoring features.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2009 Wolfson Microelectronics plc
^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/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/wm831x/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/wm831x/auxadc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static const char * const input_names[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) [WM831X_AUX_SYSVDD] = "SYSVDD",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) [WM831X_AUX_USB] = "USB",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) [WM831X_AUX_BKUP_BATT] = "Backup battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) [WM831X_AUX_BATT] = "Battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) [WM831X_AUX_WALL] = "WALL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) [WM831X_AUX_CHIP_TEMP] = "PMIC",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) [WM831X_AUX_BATT_TEMP] = "Battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static ssize_t show_voltage(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct wm831x *wm831x = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int channel = to_sensor_dev_attr(attr)->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ret = wm831x_auxadc_read_uv(wm831x, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret, 1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static ssize_t show_chip_temp(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct wm831x *wm831x = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int channel = to_sensor_dev_attr(attr)->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) ret = wm831x_auxadc_read(wm831x, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* Degrees celsius = (512.18-ret) / 1.0983 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ret = 512180 - (ret * 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ret = DIV_ROUND_CLOSEST(ret * 10000, 10983);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return sprintf(buf, "%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static ssize_t show_label(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int channel = to_sensor_dev_attr(attr)->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return sprintf(buf, "%s\n", input_names[channel]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define WM831X_VOLTAGE(id, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) NULL, name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define WM831X_NAMED_VOLTAGE(id, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) WM831X_VOLTAGE(id, name); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) NULL, name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) WM831X_VOLTAGE(0, WM831X_AUX_AUX1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) WM831X_VOLTAGE(1, WM831X_AUX_AUX2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) WM831X_VOLTAGE(2, WM831X_AUX_AUX3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) WM831X_VOLTAGE(3, WM831X_AUX_AUX4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) WM831X_NAMED_VOLTAGE(4, WM831X_AUX_SYSVDD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) WM831X_NAMED_VOLTAGE(5, WM831X_AUX_USB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) WM831X_NAMED_VOLTAGE(6, WM831X_AUX_BATT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) WM831X_NAMED_VOLTAGE(7, WM831X_AUX_WALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) WM831X_NAMED_VOLTAGE(8, WM831X_AUX_BKUP_BATT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_chip_temp, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) WM831X_AUX_CHIP_TEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_label, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) WM831X_AUX_CHIP_TEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * Report as a voltage since conversion depends on external components
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * and that's what the ABI wants.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_voltage, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) WM831X_AUX_BATT_TEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) WM831X_AUX_BATT_TEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static struct attribute *wm831x_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) &sensor_dev_attr_in0_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) &sensor_dev_attr_in1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) &sensor_dev_attr_in2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) &sensor_dev_attr_in3_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) &sensor_dev_attr_in4_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) &sensor_dev_attr_in4_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) &sensor_dev_attr_in5_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) &sensor_dev_attr_in5_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) &sensor_dev_attr_in6_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) &sensor_dev_attr_in6_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) &sensor_dev_attr_in7_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) &sensor_dev_attr_in7_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) &sensor_dev_attr_in8_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) &sensor_dev_attr_in8_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) &sensor_dev_attr_temp1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) &sensor_dev_attr_temp1_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) &sensor_dev_attr_temp2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) &sensor_dev_attr_temp2_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ATTRIBUTE_GROUPS(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static int wm831x_hwmon_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm831x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) wm831x,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) wm831x_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static struct platform_driver wm831x_hwmon_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .probe = wm831x_hwmon_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .name = "wm831x-hwmon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) module_platform_driver(wm831x_hwmon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) MODULE_DESCRIPTION("WM831x Hardware Monitoring");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) MODULE_ALIAS("platform:wm831x-hwmon");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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