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92 lines
2.5 KiB
92 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC |
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* hardware monitoring features. |
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* |
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* Copyright (C) 2009 Wolfson Microelectronics plc |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/platform_device.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/mfd/wm8350/core.h> |
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#include <linux/mfd/wm8350/comparator.h> |
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static const char * const input_names[] = { |
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[WM8350_AUXADC_USB] = "USB", |
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[WM8350_AUXADC_LINE] = "Line", |
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[WM8350_AUXADC_BATT] = "Battery", |
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}; |
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static ssize_t show_voltage(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct wm8350 *wm8350 = dev_get_drvdata(dev); |
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int channel = to_sensor_dev_attr(attr)->index; |
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int val; |
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val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF; |
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val = DIV_ROUND_CLOSEST(val, 1000); |
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return sprintf(buf, "%d\n", val); |
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} |
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static ssize_t show_label(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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int channel = to_sensor_dev_attr(attr)->index; |
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return sprintf(buf, "%s\n", input_names[channel]); |
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} |
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#define WM8350_NAMED_VOLTAGE(id, name) \ |
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static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\ |
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NULL, name); \ |
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static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \ |
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NULL, name) |
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WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB); |
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WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT); |
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WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE); |
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static struct attribute *wm8350_attrs[] = { |
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&sensor_dev_attr_in0_input.dev_attr.attr, |
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&sensor_dev_attr_in0_label.dev_attr.attr, |
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&sensor_dev_attr_in1_input.dev_attr.attr, |
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&sensor_dev_attr_in1_label.dev_attr.attr, |
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&sensor_dev_attr_in2_input.dev_attr.attr, |
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&sensor_dev_attr_in2_label.dev_attr.attr, |
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NULL, |
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}; |
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ATTRIBUTE_GROUPS(wm8350); |
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static int wm8350_hwmon_probe(struct platform_device *pdev) |
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{ |
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struct wm8350 *wm8350 = platform_get_drvdata(pdev); |
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struct device *hwmon_dev; |
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hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm8350", |
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wm8350, |
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wm8350_groups); |
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return PTR_ERR_OR_ZERO(hwmon_dev); |
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} |
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static struct platform_driver wm8350_hwmon_driver = { |
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.probe = wm8350_hwmon_probe, |
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.driver = { |
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.name = "wm8350-hwmon", |
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}, |
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}; |
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module_platform_driver(wm8350_hwmon_driver); |
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MODULE_AUTHOR("Mark Brown <[email protected]>"); |
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MODULE_DESCRIPTION("WM8350 Hardware Monitoring"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:wm8350-hwmon");
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