21eb0be9ac
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license v2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141334.424952652@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* drivers/hwmon/wm831x-hwmon.c - Wolfson Microelectronics WM831x 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/platform_device.h>
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#include <linux/err.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/slab.h>
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#include <linux/mfd/wm831x/core.h>
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#include <linux/mfd/wm831x/auxadc.h>
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static const char * const input_names[] = {
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[WM831X_AUX_SYSVDD] = "SYSVDD",
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[WM831X_AUX_USB] = "USB",
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[WM831X_AUX_BKUP_BATT] = "Backup battery",
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[WM831X_AUX_BATT] = "Battery",
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[WM831X_AUX_WALL] = "WALL",
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[WM831X_AUX_CHIP_TEMP] = "PMIC",
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[WM831X_AUX_BATT_TEMP] = "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 wm831x *wm831x = dev_get_drvdata(dev);
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int channel = to_sensor_dev_attr(attr)->index;
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int ret;
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ret = wm831x_auxadc_read_uv(wm831x, channel);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret, 1000));
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}
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static ssize_t show_chip_temp(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct wm831x *wm831x = dev_get_drvdata(dev);
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int channel = to_sensor_dev_attr(attr)->index;
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int ret;
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ret = wm831x_auxadc_read(wm831x, channel);
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if (ret < 0)
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return ret;
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/* Degrees celsius = (512.18-ret) / 1.0983 */
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ret = 512180 - (ret * 1000);
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ret = DIV_ROUND_CLOSEST(ret * 10000, 10983);
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return sprintf(buf, "%d\n", ret);
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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 WM831X_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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#define WM831X_NAMED_VOLTAGE(id, name) \
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WM831X_VOLTAGE(id, 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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WM831X_VOLTAGE(0, WM831X_AUX_AUX1);
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WM831X_VOLTAGE(1, WM831X_AUX_AUX2);
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WM831X_VOLTAGE(2, WM831X_AUX_AUX3);
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WM831X_VOLTAGE(3, WM831X_AUX_AUX4);
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WM831X_NAMED_VOLTAGE(4, WM831X_AUX_SYSVDD);
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WM831X_NAMED_VOLTAGE(5, WM831X_AUX_USB);
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WM831X_NAMED_VOLTAGE(6, WM831X_AUX_BATT);
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WM831X_NAMED_VOLTAGE(7, WM831X_AUX_WALL);
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WM831X_NAMED_VOLTAGE(8, WM831X_AUX_BKUP_BATT);
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static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_chip_temp, NULL,
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WM831X_AUX_CHIP_TEMP);
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static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_label, NULL,
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WM831X_AUX_CHIP_TEMP);
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/*
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* Report as a voltage since conversion depends on external components
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* and that's what the ABI wants.
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*/
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static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_voltage, NULL,
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WM831X_AUX_BATT_TEMP);
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static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
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WM831X_AUX_BATT_TEMP);
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static struct attribute *wm831x_attrs[] = {
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&sensor_dev_attr_in0_input.dev_attr.attr,
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&sensor_dev_attr_in1_input.dev_attr.attr,
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&sensor_dev_attr_in2_input.dev_attr.attr,
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&sensor_dev_attr_in3_input.dev_attr.attr,
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&sensor_dev_attr_in4_input.dev_attr.attr,
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&sensor_dev_attr_in4_label.dev_attr.attr,
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&sensor_dev_attr_in5_input.dev_attr.attr,
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&sensor_dev_attr_in5_label.dev_attr.attr,
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&sensor_dev_attr_in6_input.dev_attr.attr,
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&sensor_dev_attr_in6_label.dev_attr.attr,
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&sensor_dev_attr_in7_input.dev_attr.attr,
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&sensor_dev_attr_in7_label.dev_attr.attr,
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&sensor_dev_attr_in8_input.dev_attr.attr,
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&sensor_dev_attr_in8_label.dev_attr.attr,
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp1_label.dev_attr.attr,
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&sensor_dev_attr_temp2_input.dev_attr.attr,
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&sensor_dev_attr_temp2_label.dev_attr.attr,
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NULL
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};
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ATTRIBUTE_GROUPS(wm831x);
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static int wm831x_hwmon_probe(struct platform_device *pdev)
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{
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struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
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struct device *hwmon_dev;
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hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm831x",
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wm831x,
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wm831x_groups);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static struct platform_driver wm831x_hwmon_driver = {
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.probe = wm831x_hwmon_probe,
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.driver = {
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.name = "wm831x-hwmon",
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},
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};
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module_platform_driver(wm831x_hwmon_driver);
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_DESCRIPTION("WM831x Hardware Monitoring");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:wm831x-hwmon");
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