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