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247 lines
6.6 KiB
247 lines
6.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* |
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* Copyright (C) 2012 ARM Limited |
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*/ |
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#define DRVNAME "vexpress-hwmon" |
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#define pr_fmt(fmt) DRVNAME ": " fmt |
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#include <linux/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/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/vexpress.h> |
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struct vexpress_hwmon_data { |
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struct device *hwmon_dev; |
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struct regmap *reg; |
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}; |
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static ssize_t vexpress_hwmon_label_show(struct device *dev, |
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struct device_attribute *dev_attr, char *buffer) |
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{ |
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const char *label = of_get_property(dev->of_node, "label", NULL); |
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return sysfs_emit(buffer, "%s\n", label); |
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} |
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static ssize_t vexpress_hwmon_u32_show(struct device *dev, |
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struct device_attribute *dev_attr, char *buffer) |
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{ |
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struct vexpress_hwmon_data *data = dev_get_drvdata(dev); |
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int err; |
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u32 value; |
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err = regmap_read(data->reg, 0, &value); |
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if (err) |
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return err; |
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return sysfs_emit(buffer, "%u\n", value / |
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to_sensor_dev_attr(dev_attr)->index); |
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} |
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static ssize_t vexpress_hwmon_u64_show(struct device *dev, |
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struct device_attribute *dev_attr, char *buffer) |
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{ |
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struct vexpress_hwmon_data *data = dev_get_drvdata(dev); |
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int err; |
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u32 value_hi, value_lo; |
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err = regmap_read(data->reg, 0, &value_lo); |
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if (err) |
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return err; |
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err = regmap_read(data->reg, 1, &value_hi); |
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if (err) |
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return err; |
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return sysfs_emit(buffer, "%llu\n", |
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div_u64(((u64)value_hi << 32) | value_lo, |
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to_sensor_dev_attr(dev_attr)->index)); |
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} |
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static umode_t vexpress_hwmon_attr_is_visible(struct kobject *kobj, |
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struct attribute *attr, int index) |
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{ |
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struct device *dev = kobj_to_dev(kobj); |
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struct device_attribute *dev_attr = container_of(attr, |
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struct device_attribute, attr); |
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if (dev_attr->show == vexpress_hwmon_label_show && |
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!of_get_property(dev->of_node, "label", NULL)) |
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return 0; |
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return attr->mode; |
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} |
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struct vexpress_hwmon_type { |
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const char *name; |
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const struct attribute_group **attr_groups; |
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}; |
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#if !defined(CONFIG_REGULATOR_VEXPRESS) |
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static DEVICE_ATTR(in1_label, 0444, vexpress_hwmon_label_show, NULL); |
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static SENSOR_DEVICE_ATTR_RO(in1_input, vexpress_hwmon_u32, 1000); |
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static struct attribute *vexpress_hwmon_attrs_volt[] = { |
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&dev_attr_in1_label.attr, |
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&sensor_dev_attr_in1_input.dev_attr.attr, |
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NULL |
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}; |
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static struct attribute_group vexpress_hwmon_group_volt = { |
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.is_visible = vexpress_hwmon_attr_is_visible, |
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.attrs = vexpress_hwmon_attrs_volt, |
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}; |
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static struct vexpress_hwmon_type vexpress_hwmon_volt = { |
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.name = "vexpress_volt", |
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.attr_groups = (const struct attribute_group *[]) { |
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&vexpress_hwmon_group_volt, |
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NULL, |
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}, |
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}; |
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#endif |
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static DEVICE_ATTR(curr1_label, 0444, vexpress_hwmon_label_show, NULL); |
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static SENSOR_DEVICE_ATTR_RO(curr1_input, vexpress_hwmon_u32, 1000); |
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static struct attribute *vexpress_hwmon_attrs_amp[] = { |
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&dev_attr_curr1_label.attr, |
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&sensor_dev_attr_curr1_input.dev_attr.attr, |
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NULL |
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}; |
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static struct attribute_group vexpress_hwmon_group_amp = { |
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.is_visible = vexpress_hwmon_attr_is_visible, |
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.attrs = vexpress_hwmon_attrs_amp, |
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}; |
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static struct vexpress_hwmon_type vexpress_hwmon_amp = { |
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.name = "vexpress_amp", |
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.attr_groups = (const struct attribute_group *[]) { |
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&vexpress_hwmon_group_amp, |
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NULL |
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}, |
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}; |
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static DEVICE_ATTR(temp1_label, 0444, vexpress_hwmon_label_show, NULL); |
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static SENSOR_DEVICE_ATTR_RO(temp1_input, vexpress_hwmon_u32, 1000); |
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static struct attribute *vexpress_hwmon_attrs_temp[] = { |
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&dev_attr_temp1_label.attr, |
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&sensor_dev_attr_temp1_input.dev_attr.attr, |
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NULL |
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}; |
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static struct attribute_group vexpress_hwmon_group_temp = { |
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.is_visible = vexpress_hwmon_attr_is_visible, |
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.attrs = vexpress_hwmon_attrs_temp, |
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}; |
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static struct vexpress_hwmon_type vexpress_hwmon_temp = { |
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.name = "vexpress_temp", |
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.attr_groups = (const struct attribute_group *[]) { |
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&vexpress_hwmon_group_temp, |
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NULL |
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}, |
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}; |
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static DEVICE_ATTR(power1_label, 0444, vexpress_hwmon_label_show, NULL); |
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static SENSOR_DEVICE_ATTR_RO(power1_input, vexpress_hwmon_u32, 1); |
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static struct attribute *vexpress_hwmon_attrs_power[] = { |
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&dev_attr_power1_label.attr, |
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&sensor_dev_attr_power1_input.dev_attr.attr, |
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NULL |
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}; |
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static struct attribute_group vexpress_hwmon_group_power = { |
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.is_visible = vexpress_hwmon_attr_is_visible, |
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.attrs = vexpress_hwmon_attrs_power, |
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}; |
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static struct vexpress_hwmon_type vexpress_hwmon_power = { |
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.name = "vexpress_power", |
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.attr_groups = (const struct attribute_group *[]) { |
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&vexpress_hwmon_group_power, |
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NULL |
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}, |
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}; |
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static DEVICE_ATTR(energy1_label, 0444, vexpress_hwmon_label_show, NULL); |
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static SENSOR_DEVICE_ATTR_RO(energy1_input, vexpress_hwmon_u64, 1); |
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static struct attribute *vexpress_hwmon_attrs_energy[] = { |
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&dev_attr_energy1_label.attr, |
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&sensor_dev_attr_energy1_input.dev_attr.attr, |
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NULL |
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}; |
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static struct attribute_group vexpress_hwmon_group_energy = { |
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.is_visible = vexpress_hwmon_attr_is_visible, |
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.attrs = vexpress_hwmon_attrs_energy, |
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}; |
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static struct vexpress_hwmon_type vexpress_hwmon_energy = { |
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.name = "vexpress_energy", |
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.attr_groups = (const struct attribute_group *[]) { |
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&vexpress_hwmon_group_energy, |
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NULL |
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}, |
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}; |
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static const struct of_device_id vexpress_hwmon_of_match[] = { |
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#if !defined(CONFIG_REGULATOR_VEXPRESS) |
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{ |
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.compatible = "arm,vexpress-volt", |
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.data = &vexpress_hwmon_volt, |
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}, |
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#endif |
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{ |
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.compatible = "arm,vexpress-amp", |
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.data = &vexpress_hwmon_amp, |
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}, { |
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.compatible = "arm,vexpress-temp", |
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.data = &vexpress_hwmon_temp, |
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}, { |
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.compatible = "arm,vexpress-power", |
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.data = &vexpress_hwmon_power, |
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}, { |
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.compatible = "arm,vexpress-energy", |
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.data = &vexpress_hwmon_energy, |
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}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, vexpress_hwmon_of_match); |
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static int vexpress_hwmon_probe(struct platform_device *pdev) |
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{ |
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const struct of_device_id *match; |
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struct vexpress_hwmon_data *data; |
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const struct vexpress_hwmon_type *type; |
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); |
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if (!data) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, data); |
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match = of_match_device(vexpress_hwmon_of_match, &pdev->dev); |
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if (!match) |
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return -ENODEV; |
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type = match->data; |
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data->reg = devm_regmap_init_vexpress_config(&pdev->dev); |
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if (IS_ERR(data->reg)) |
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return PTR_ERR(data->reg); |
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data->hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, |
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type->name, data, type->attr_groups); |
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return PTR_ERR_OR_ZERO(data->hwmon_dev); |
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} |
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static struct platform_driver vexpress_hwmon_driver = { |
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.probe = vexpress_hwmon_probe, |
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.driver = { |
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.name = DRVNAME, |
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.of_match_table = vexpress_hwmon_of_match, |
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}, |
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}; |
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module_platform_driver(vexpress_hwmon_driver); |
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MODULE_AUTHOR("Pawel Moll <[email protected]>"); |
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MODULE_DESCRIPTION("Versatile Express hwmon sensors driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:vexpress-hwmon");
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