^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/wm8350-hwmon.c - Wolfson Microelectronics WM8350 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/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mfd/wm8350/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/wm8350/comparator.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static const char * const input_names[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) [WM8350_AUXADC_USB] = "USB",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) [WM8350_AUXADC_LINE] = "Line",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) [WM8350_AUXADC_BATT] = "Battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static ssize_t show_voltage(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct wm8350 *wm8350 = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int channel = to_sensor_dev_attr(attr)->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) val = DIV_ROUND_CLOSEST(val, 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return sprintf(buf, "%d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static ssize_t show_label(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int channel = to_sensor_dev_attr(attr)->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return sprintf(buf, "%s\n", input_names[channel]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define WM8350_NAMED_VOLTAGE(id, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) NULL, name); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) NULL, name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static struct attribute *wm8350_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) &sensor_dev_attr_in0_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) &sensor_dev_attr_in0_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) &sensor_dev_attr_in1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) &sensor_dev_attr_in1_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) &sensor_dev_attr_in2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) &sensor_dev_attr_in2_label.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ATTRIBUTE_GROUPS(wm8350);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int wm8350_hwmon_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct wm8350 *wm8350 = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm8350",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) wm8350,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) wm8350_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static struct platform_driver wm8350_hwmon_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .probe = wm8350_hwmon_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .name = "wm8350-hwmon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) module_platform_driver(wm8350_hwmon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) MODULE_ALIAS("platform:wm8350-hwmon");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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