// SPDX-License-Identifier: GPL-2.0-only /* * dptf_power: DPTF platform power driver * Copyright (c) 2016, Intel Corporation. */ #include #include #include #include /* * Presentation of attributes which are defined for INT3407 and INT3532. * They are: * PMAX : Maximum platform powe * PSRC : Platform power source * ARTG : Adapter rating * CTYP : Charger type * PBSS : Battery steady power * PROP : Rest of worst case platform Power * PBSS : Power Battery Steady State * PBSS : Power Battery Steady State * RBHF : High Frequency Impedance * VBNL : Instantaneous No-Load Voltage * CMPP : Current Discharge Capability */ #define DPTF_POWER_SHOW(name, object) \ static ssize_t name##_show(struct device *dev,\ struct device_attribute *attr,\ char *buf)\ {\ struct acpi_device *acpi_dev = dev_get_drvdata(dev);\ unsigned long long val;\ acpi_status status;\ \ status = acpi_evaluate_integer(acpi_dev->handle, #object,\ NULL, &val);\ if (ACPI_SUCCESS(status))\ return sprintf(buf, "%d\n", (int)val);\ else \ return -EINVAL;\ } DPTF_POWER_SHOW(max_platform_power_mw, PMAX) DPTF_POWER_SHOW(platform_power_source, PSRC) DPTF_POWER_SHOW(adapter_rating_mw, ARTG) DPTF_POWER_SHOW(battery_steady_power_mw, PBSS) DPTF_POWER_SHOW(charger_type, CTYP) DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP) DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS) DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF) DPTF_POWER_SHOW(no_load_voltage_mv, VBNL) DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP); static DEVICE_ATTR_RO(max_platform_power_mw); static DEVICE_ATTR_RO(platform_power_source); static DEVICE_ATTR_RO(adapter_rating_mw); static DEVICE_ATTR_RO(battery_steady_power_mw); static DEVICE_ATTR_RO(charger_type); static DEVICE_ATTR_RO(rest_of_platform_power_mw); static DEVICE_ATTR_RO(max_steady_state_power_mw); static DEVICE_ATTR_RO(high_freq_impedance_mohm); static DEVICE_ATTR_RO(no_load_voltage_mv); static DEVICE_ATTR_RO(current_discharge_capbility_ma); static ssize_t prochot_confirm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi_dev = dev_get_drvdata(dev); acpi_status status; int seq_no; if (kstrtouint(buf, 0, &seq_no) < 0) return -EINVAL; status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no); if (ACPI_SUCCESS(status)) return count; return -EINVAL; } static DEVICE_ATTR_WO(prochot_confirm); static struct attribute *dptf_power_attrs[] = { &dev_attr_max_platform_power_mw.attr, &dev_attr_platform_power_source.attr, &dev_attr_adapter_rating_mw.attr, &dev_attr_battery_steady_power_mw.attr, &dev_attr_charger_type.attr, &dev_attr_rest_of_platform_power_mw.attr, &dev_attr_prochot_confirm.attr, NULL }; static const struct attribute_group dptf_power_attribute_group = { .attrs = dptf_power_attrs, .name = "dptf_power" }; static struct attribute *dptf_battery_attrs[] = { &dev_attr_max_platform_power_mw.attr, &dev_attr_max_steady_state_power_mw.attr, &dev_attr_high_freq_impedance_mohm.attr, &dev_attr_no_load_voltage_mv.attr, &dev_attr_current_discharge_capbility_ma.attr, NULL }; static const struct attribute_group dptf_battery_attribute_group = { .attrs = dptf_battery_attrs, .name = "dptf_battery" }; #define MAX_POWER_CHANGED 0x80 #define POWER_STATE_CHANGED 0x81 #define STEADY_STATE_POWER_CHANGED 0x83 #define POWER_PROP_CHANGE_EVENT 0x84 #define IMPEDANCED_CHNGED 0x85 #define VOLTAGE_CURRENT_CHANGED 0x86 static long long dptf_participant_type(acpi_handle handle) { unsigned long long ptype; acpi_status status; status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype); if (ACPI_FAILURE(status)) return -ENODEV; return ptype; } static void dptf_power_notify(acpi_handle handle, u32 event, void *data) { struct platform_device *pdev = data; char *attr; switch (event) { case POWER_STATE_CHANGED: attr = "platform_power_source"; break; case POWER_PROP_CHANGE_EVENT: attr = "rest_of_platform_power_mw"; break; case MAX_POWER_CHANGED: attr = "max_platform_power_mw"; break; case STEADY_STATE_POWER_CHANGED: attr = "max_steady_state_power_mw"; break; case VOLTAGE_CURRENT_CHANGED: attr = "no_load_voltage_mv"; break; default: dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event); return; } /* * Notify that an attribute is changed, so that user space can read * again. */ if (dptf_participant_type(handle) == 0x0CULL) sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr); else sysfs_notify(&pdev->dev.kobj, "dptf_power", attr); } static int dptf_power_add(struct platform_device *pdev) { const struct attribute_group *attr_group; struct acpi_device *acpi_dev; unsigned long long ptype; int result; acpi_dev = ACPI_COMPANION(&(pdev->dev)); if (!acpi_dev) return -ENODEV; ptype = dptf_participant_type(acpi_dev->handle); if (ptype == 0x11) attr_group = &dptf_power_attribute_group; else if (ptype == 0x0C) attr_group = &dptf_battery_attribute_group; else return -ENODEV; result = acpi_install_notify_handler(acpi_dev->handle, ACPI_DEVICE_NOTIFY, dptf_power_notify, (void *)pdev); if (result) return result; result = sysfs_create_group(&pdev->dev.kobj, attr_group); if (result) { acpi_remove_notify_handler(acpi_dev->handle, ACPI_DEVICE_NOTIFY, dptf_power_notify); return result; } platform_set_drvdata(pdev, acpi_dev); return 0; } static int dptf_power_remove(struct platform_device *pdev) { struct acpi_device *acpi_dev = platform_get_drvdata(pdev); acpi_remove_notify_handler(acpi_dev->handle, ACPI_DEVICE_NOTIFY, dptf_power_notify); if (dptf_participant_type(acpi_dev->handle) == 0x0CULL) sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group); else sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group); return 0; } static const struct acpi_device_id int3407_device_ids[] = { {"INT3407", 0}, {"INT3532", 0}, {"INTC1047", 0}, {"INTC1050", 0}, {"INTC1060", 0}, {"INTC1061", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, int3407_device_ids); static struct platform_driver dptf_power_driver = { .probe = dptf_power_add, .remove = dptf_power_remove, .driver = { .name = "dptf_power", .acpi_match_table = int3407_device_ids, }, }; module_platform_driver(dptf_power_driver); MODULE_AUTHOR("Srinivas Pandruvada "); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ACPI DPTF platform power driver");