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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 | // SPDX-License-Identifier: GPL-2.0-only /* * dptf_power: DPTF platform power driver * Copyright (c) 2016, Intel Corporation. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/acpi.h> #include <linux/platform_device.h> /* * Presentation of attributes which are defined for INT3407 and INT3532. * They are: * PMAX : Maximum platform power * PSRC : Platform power source * ARTG : Adapter rating * CTYP : Charger type * PROP : Rest of worst case platform Power * 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 IMPEDANCE_CHANGED 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 IMPEDANCE_CHANGED: attr = "high_freq_impedance_mohm"; 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}, {"INTC1065", 0}, {"INTC1066", 0}, {"INTC10A4", 0}, {"INTC10A5", 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 <srinivas.pandruvada@linux.intel.com>"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ACPI DPTF platform power driver"); |