100ae053aSSrinivas Pandruvada // SPDX-License-Identifier: GPL-2.0-or-later 200ae053aSSrinivas Pandruvada /* 300ae053aSSrinivas Pandruvada * fan_core.c - ACPI Fan core Driver 400ae053aSSrinivas Pandruvada * 500ae053aSSrinivas Pandruvada * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 600ae053aSSrinivas Pandruvada * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 700ae053aSSrinivas Pandruvada * Copyright (C) 2022 Intel Corporation. All rights reserved. 800ae053aSSrinivas Pandruvada */ 900ae053aSSrinivas Pandruvada 1000ae053aSSrinivas Pandruvada #include <linux/kernel.h> 1100ae053aSSrinivas Pandruvada #include <linux/module.h> 1200ae053aSSrinivas Pandruvada #include <linux/init.h> 1300ae053aSSrinivas Pandruvada #include <linux/types.h> 1400ae053aSSrinivas Pandruvada #include <linux/uaccess.h> 1500ae053aSSrinivas Pandruvada #include <linux/thermal.h> 1600ae053aSSrinivas Pandruvada #include <linux/acpi.h> 1700ae053aSSrinivas Pandruvada #include <linux/platform_device.h> 1800ae053aSSrinivas Pandruvada #include <linux/sort.h> 1900ae053aSSrinivas Pandruvada 2000ae053aSSrinivas Pandruvada #include "fan.h" 2100ae053aSSrinivas Pandruvada 2200ae053aSSrinivas Pandruvada static const struct acpi_device_id fan_device_ids[] = { 2300ae053aSSrinivas Pandruvada ACPI_FAN_DEVICE_IDS, 2400ae053aSSrinivas Pandruvada {"", 0}, 2500ae053aSSrinivas Pandruvada }; 2600ae053aSSrinivas Pandruvada MODULE_DEVICE_TABLE(acpi, fan_device_ids); 2700ae053aSSrinivas Pandruvada 2800ae053aSSrinivas Pandruvada /* thermal cooling device callbacks */ 2900ae053aSSrinivas Pandruvada static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long 3000ae053aSSrinivas Pandruvada *state) 3100ae053aSSrinivas Pandruvada { 3200ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 3300ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 3400ae053aSSrinivas Pandruvada 35bea2d986SSrinivas Pandruvada if (fan->acpi4) { 36bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) 37bea2d986SSrinivas Pandruvada *state = 100 / fan->fif.step_size; 3800ae053aSSrinivas Pandruvada else 39bea2d986SSrinivas Pandruvada *state = fan->fps_count - 1; 40bea2d986SSrinivas Pandruvada } else { 4100ae053aSSrinivas Pandruvada *state = 1; 42bea2d986SSrinivas Pandruvada } 43bea2d986SSrinivas Pandruvada 4400ae053aSSrinivas Pandruvada return 0; 4500ae053aSSrinivas Pandruvada } 4600ae053aSSrinivas Pandruvada 47f1197343SSrinivas Pandruvada int acpi_fan_get_fst(struct acpi_device *device, struct acpi_fan_fst *fst) 4800ae053aSSrinivas Pandruvada { 4900ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 5000ae053aSSrinivas Pandruvada union acpi_object *obj; 5100ae053aSSrinivas Pandruvada acpi_status status; 52bea2d986SSrinivas Pandruvada int ret = 0; 5300ae053aSSrinivas Pandruvada 5400ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer); 5500ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 5600ae053aSSrinivas Pandruvada dev_err(&device->dev, "Get fan state failed\n"); 5700ae053aSSrinivas Pandruvada return -ENODEV; 5800ae053aSSrinivas Pandruvada } 5900ae053aSSrinivas Pandruvada 6000ae053aSSrinivas Pandruvada obj = buffer.pointer; 6100ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE || 6200ae053aSSrinivas Pandruvada obj->package.count != 3 || 6300ae053aSSrinivas Pandruvada obj->package.elements[1].type != ACPI_TYPE_INTEGER) { 6400ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FST data\n"); 65bea2d986SSrinivas Pandruvada ret = -EINVAL; 6600ae053aSSrinivas Pandruvada goto err; 6700ae053aSSrinivas Pandruvada } 6800ae053aSSrinivas Pandruvada 69bea2d986SSrinivas Pandruvada fst->revision = obj->package.elements[0].integer.value; 70bea2d986SSrinivas Pandruvada fst->control = obj->package.elements[1].integer.value; 71bea2d986SSrinivas Pandruvada fst->speed = obj->package.elements[2].integer.value; 72bea2d986SSrinivas Pandruvada 73bea2d986SSrinivas Pandruvada err: 74bea2d986SSrinivas Pandruvada kfree(obj); 75bea2d986SSrinivas Pandruvada return ret; 7600ae053aSSrinivas Pandruvada } 77bea2d986SSrinivas Pandruvada 78bea2d986SSrinivas Pandruvada static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state) 79bea2d986SSrinivas Pandruvada { 80bea2d986SSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 81bea2d986SSrinivas Pandruvada struct acpi_fan_fst fst; 82bea2d986SSrinivas Pandruvada int status, i; 83bea2d986SSrinivas Pandruvada 84bea2d986SSrinivas Pandruvada status = acpi_fan_get_fst(device, &fst); 85bea2d986SSrinivas Pandruvada if (status) 86bea2d986SSrinivas Pandruvada return status; 87bea2d986SSrinivas Pandruvada 88bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) { 89bea2d986SSrinivas Pandruvada /* This control should be same what we set using _FSL by spec */ 90bea2d986SSrinivas Pandruvada if (fst.control > 100) { 91bea2d986SSrinivas Pandruvada dev_dbg(&device->dev, "Invalid control value returned\n"); 92bea2d986SSrinivas Pandruvada goto match_fps; 93bea2d986SSrinivas Pandruvada } 94bea2d986SSrinivas Pandruvada 95bea2d986SSrinivas Pandruvada *state = (int) fst.control / fan->fif.step_size; 96bea2d986SSrinivas Pandruvada return 0; 97bea2d986SSrinivas Pandruvada } 98bea2d986SSrinivas Pandruvada 99bea2d986SSrinivas Pandruvada match_fps: 100bea2d986SSrinivas Pandruvada for (i = 0; i < fan->fps_count; i++) { 101bea2d986SSrinivas Pandruvada if (fst.control == fan->fps[i].control) 102bea2d986SSrinivas Pandruvada break; 10300ae053aSSrinivas Pandruvada } 10400ae053aSSrinivas Pandruvada if (i == fan->fps_count) { 10500ae053aSSrinivas Pandruvada dev_dbg(&device->dev, "Invalid control value returned\n"); 106bea2d986SSrinivas Pandruvada return -EINVAL; 10700ae053aSSrinivas Pandruvada } 10800ae053aSSrinivas Pandruvada 10900ae053aSSrinivas Pandruvada *state = i; 11000ae053aSSrinivas Pandruvada 11100ae053aSSrinivas Pandruvada return status; 11200ae053aSSrinivas Pandruvada } 11300ae053aSSrinivas Pandruvada 11400ae053aSSrinivas Pandruvada static int fan_get_state(struct acpi_device *device, unsigned long *state) 11500ae053aSSrinivas Pandruvada { 11600ae053aSSrinivas Pandruvada int result; 11700ae053aSSrinivas Pandruvada int acpi_state = ACPI_STATE_D0; 11800ae053aSSrinivas Pandruvada 11900ae053aSSrinivas Pandruvada result = acpi_device_update_power(device, &acpi_state); 12000ae053aSSrinivas Pandruvada if (result) 12100ae053aSSrinivas Pandruvada return result; 12200ae053aSSrinivas Pandruvada 12300ae053aSSrinivas Pandruvada *state = acpi_state == ACPI_STATE_D3_COLD 12400ae053aSSrinivas Pandruvada || acpi_state == ACPI_STATE_D3_HOT ? 12500ae053aSSrinivas Pandruvada 0 : (acpi_state == ACPI_STATE_D0 ? 1 : -1); 12600ae053aSSrinivas Pandruvada return 0; 12700ae053aSSrinivas Pandruvada } 12800ae053aSSrinivas Pandruvada 12900ae053aSSrinivas Pandruvada static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long 13000ae053aSSrinivas Pandruvada *state) 13100ae053aSSrinivas Pandruvada { 13200ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 13300ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 13400ae053aSSrinivas Pandruvada 13500ae053aSSrinivas Pandruvada if (fan->acpi4) 13600ae053aSSrinivas Pandruvada return fan_get_state_acpi4(device, state); 13700ae053aSSrinivas Pandruvada else 13800ae053aSSrinivas Pandruvada return fan_get_state(device, state); 13900ae053aSSrinivas Pandruvada } 14000ae053aSSrinivas Pandruvada 14100ae053aSSrinivas Pandruvada static int fan_set_state(struct acpi_device *device, unsigned long state) 14200ae053aSSrinivas Pandruvada { 14300ae053aSSrinivas Pandruvada if (state != 0 && state != 1) 14400ae053aSSrinivas Pandruvada return -EINVAL; 14500ae053aSSrinivas Pandruvada 14600ae053aSSrinivas Pandruvada return acpi_device_set_power(device, 14700ae053aSSrinivas Pandruvada state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD); 14800ae053aSSrinivas Pandruvada } 14900ae053aSSrinivas Pandruvada 15000ae053aSSrinivas Pandruvada static int fan_set_state_acpi4(struct acpi_device *device, unsigned long state) 15100ae053aSSrinivas Pandruvada { 15200ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 15300ae053aSSrinivas Pandruvada acpi_status status; 154bea2d986SSrinivas Pandruvada u64 value = state; 155bea2d986SSrinivas Pandruvada int max_state; 15600ae053aSSrinivas Pandruvada 157bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) 158bea2d986SSrinivas Pandruvada max_state = 100 / fan->fif.step_size; 159bea2d986SSrinivas Pandruvada else 160bea2d986SSrinivas Pandruvada max_state = fan->fps_count - 1; 161bea2d986SSrinivas Pandruvada 162bea2d986SSrinivas Pandruvada if (state > max_state) 16300ae053aSSrinivas Pandruvada return -EINVAL; 16400ae053aSSrinivas Pandruvada 165bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) { 166bea2d986SSrinivas Pandruvada value *= fan->fif.step_size; 167bea2d986SSrinivas Pandruvada /* Spec allows compensate the last step only */ 168bea2d986SSrinivas Pandruvada if (value + fan->fif.step_size > 100) 169bea2d986SSrinivas Pandruvada value = 100; 170bea2d986SSrinivas Pandruvada } else { 171bea2d986SSrinivas Pandruvada value = fan->fps[state].control; 172bea2d986SSrinivas Pandruvada } 173bea2d986SSrinivas Pandruvada 174bea2d986SSrinivas Pandruvada status = acpi_execute_simple_method(device->handle, "_FSL", value); 17500ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 17600ae053aSSrinivas Pandruvada dev_dbg(&device->dev, "Failed to set state by _FSL\n"); 17700ae053aSSrinivas Pandruvada return -ENODEV; 17800ae053aSSrinivas Pandruvada } 17900ae053aSSrinivas Pandruvada 18000ae053aSSrinivas Pandruvada return 0; 18100ae053aSSrinivas Pandruvada } 18200ae053aSSrinivas Pandruvada 18300ae053aSSrinivas Pandruvada static int 18400ae053aSSrinivas Pandruvada fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) 18500ae053aSSrinivas Pandruvada { 18600ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 18700ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 18800ae053aSSrinivas Pandruvada 18900ae053aSSrinivas Pandruvada if (fan->acpi4) 19000ae053aSSrinivas Pandruvada return fan_set_state_acpi4(device, state); 19100ae053aSSrinivas Pandruvada else 19200ae053aSSrinivas Pandruvada return fan_set_state(device, state); 19300ae053aSSrinivas Pandruvada } 19400ae053aSSrinivas Pandruvada 19500ae053aSSrinivas Pandruvada static const struct thermal_cooling_device_ops fan_cooling_ops = { 19600ae053aSSrinivas Pandruvada .get_max_state = fan_get_max_state, 19700ae053aSSrinivas Pandruvada .get_cur_state = fan_get_cur_state, 19800ae053aSSrinivas Pandruvada .set_cur_state = fan_set_cur_state, 19900ae053aSSrinivas Pandruvada }; 20000ae053aSSrinivas Pandruvada 20100ae053aSSrinivas Pandruvada /* -------------------------------------------------------------------------- 20200ae053aSSrinivas Pandruvada * Driver Interface 20300ae053aSSrinivas Pandruvada * -------------------------------------------------------------------------- 20400ae053aSSrinivas Pandruvada */ 20500ae053aSSrinivas Pandruvada 20600ae053aSSrinivas Pandruvada static bool acpi_fan_is_acpi4(struct acpi_device *device) 20700ae053aSSrinivas Pandruvada { 20800ae053aSSrinivas Pandruvada return acpi_has_method(device->handle, "_FIF") && 20900ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FPS") && 21000ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FSL") && 21100ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FST"); 21200ae053aSSrinivas Pandruvada } 21300ae053aSSrinivas Pandruvada 21400ae053aSSrinivas Pandruvada static int acpi_fan_get_fif(struct acpi_device *device) 21500ae053aSSrinivas Pandruvada { 21600ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 21700ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 21800ae053aSSrinivas Pandruvada struct acpi_buffer format = { sizeof("NNNN"), "NNNN" }; 219d445571fSSrinivas Pandruvada u64 fields[4]; 220d445571fSSrinivas Pandruvada struct acpi_buffer fif = { sizeof(fields), fields }; 22100ae053aSSrinivas Pandruvada union acpi_object *obj; 22200ae053aSSrinivas Pandruvada acpi_status status; 22300ae053aSSrinivas Pandruvada 22400ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer); 22500ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) 22600ae053aSSrinivas Pandruvada return status; 22700ae053aSSrinivas Pandruvada 22800ae053aSSrinivas Pandruvada obj = buffer.pointer; 22900ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE) { 23000ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FIF data\n"); 23100ae053aSSrinivas Pandruvada status = -EINVAL; 23200ae053aSSrinivas Pandruvada goto err; 23300ae053aSSrinivas Pandruvada } 23400ae053aSSrinivas Pandruvada 23500ae053aSSrinivas Pandruvada status = acpi_extract_package(obj, &format, &fif); 23600ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 23700ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FIF element\n"); 23800ae053aSSrinivas Pandruvada status = -EINVAL; 239f2ae44aeSHanjun Guo goto err; 24000ae053aSSrinivas Pandruvada } 24100ae053aSSrinivas Pandruvada 242d445571fSSrinivas Pandruvada fan->fif.revision = fields[0]; 243d445571fSSrinivas Pandruvada fan->fif.fine_grain_ctrl = fields[1]; 244d445571fSSrinivas Pandruvada fan->fif.step_size = fields[2]; 245d445571fSSrinivas Pandruvada fan->fif.low_speed_notification = fields[3]; 246d445571fSSrinivas Pandruvada 247bea2d986SSrinivas Pandruvada /* If there is a bug in step size and set as 0, change to 1 */ 248bea2d986SSrinivas Pandruvada if (!fan->fif.step_size) 249bea2d986SSrinivas Pandruvada fan->fif.step_size = 1; 250bea2d986SSrinivas Pandruvada /* If step size > 9, change to 9 (by spec valid values 1-9) */ 251bea2d986SSrinivas Pandruvada else if (fan->fif.step_size > 9) 252bea2d986SSrinivas Pandruvada fan->fif.step_size = 9; 25300ae053aSSrinivas Pandruvada err: 25400ae053aSSrinivas Pandruvada kfree(obj); 25500ae053aSSrinivas Pandruvada return status; 25600ae053aSSrinivas Pandruvada } 25700ae053aSSrinivas Pandruvada 25800ae053aSSrinivas Pandruvada static int acpi_fan_speed_cmp(const void *a, const void *b) 25900ae053aSSrinivas Pandruvada { 26000ae053aSSrinivas Pandruvada const struct acpi_fan_fps *fps1 = a; 26100ae053aSSrinivas Pandruvada const struct acpi_fan_fps *fps2 = b; 26200ae053aSSrinivas Pandruvada return fps1->speed - fps2->speed; 26300ae053aSSrinivas Pandruvada } 26400ae053aSSrinivas Pandruvada 26500ae053aSSrinivas Pandruvada static int acpi_fan_get_fps(struct acpi_device *device) 26600ae053aSSrinivas Pandruvada { 26700ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 26800ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 26900ae053aSSrinivas Pandruvada union acpi_object *obj; 27000ae053aSSrinivas Pandruvada acpi_status status; 27100ae053aSSrinivas Pandruvada int i; 27200ae053aSSrinivas Pandruvada 27300ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer); 27400ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) 27500ae053aSSrinivas Pandruvada return status; 27600ae053aSSrinivas Pandruvada 27700ae053aSSrinivas Pandruvada obj = buffer.pointer; 27800ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) { 27900ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FPS data\n"); 28000ae053aSSrinivas Pandruvada status = -EINVAL; 28100ae053aSSrinivas Pandruvada goto err; 28200ae053aSSrinivas Pandruvada } 28300ae053aSSrinivas Pandruvada 28400ae053aSSrinivas Pandruvada fan->fps_count = obj->package.count - 1; /* minus revision field */ 28500ae053aSSrinivas Pandruvada fan->fps = devm_kcalloc(&device->dev, 28600ae053aSSrinivas Pandruvada fan->fps_count, sizeof(struct acpi_fan_fps), 28700ae053aSSrinivas Pandruvada GFP_KERNEL); 28800ae053aSSrinivas Pandruvada if (!fan->fps) { 28900ae053aSSrinivas Pandruvada dev_err(&device->dev, "Not enough memory\n"); 29000ae053aSSrinivas Pandruvada status = -ENOMEM; 29100ae053aSSrinivas Pandruvada goto err; 29200ae053aSSrinivas Pandruvada } 29300ae053aSSrinivas Pandruvada for (i = 0; i < fan->fps_count; i++) { 29400ae053aSSrinivas Pandruvada struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" }; 29500ae053aSSrinivas Pandruvada struct acpi_buffer fps = { offsetof(struct acpi_fan_fps, name), 29600ae053aSSrinivas Pandruvada &fan->fps[i] }; 29700ae053aSSrinivas Pandruvada status = acpi_extract_package(&obj->package.elements[i + 1], 29800ae053aSSrinivas Pandruvada &format, &fps); 29900ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 30000ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FPS element\n"); 30100ae053aSSrinivas Pandruvada goto err; 30200ae053aSSrinivas Pandruvada } 30300ae053aSSrinivas Pandruvada } 30400ae053aSSrinivas Pandruvada 30500ae053aSSrinivas Pandruvada /* sort the state array according to fan speed in increase order */ 30600ae053aSSrinivas Pandruvada sort(fan->fps, fan->fps_count, sizeof(*fan->fps), 30700ae053aSSrinivas Pandruvada acpi_fan_speed_cmp, NULL); 30800ae053aSSrinivas Pandruvada 30900ae053aSSrinivas Pandruvada err: 31000ae053aSSrinivas Pandruvada kfree(obj); 31100ae053aSSrinivas Pandruvada return status; 31200ae053aSSrinivas Pandruvada } 31300ae053aSSrinivas Pandruvada 31400ae053aSSrinivas Pandruvada static int acpi_fan_probe(struct platform_device *pdev) 31500ae053aSSrinivas Pandruvada { 31600ae053aSSrinivas Pandruvada int result = 0; 31700ae053aSSrinivas Pandruvada struct thermal_cooling_device *cdev; 31800ae053aSSrinivas Pandruvada struct acpi_fan *fan; 31900ae053aSSrinivas Pandruvada struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 32000ae053aSSrinivas Pandruvada char *name; 32100ae053aSSrinivas Pandruvada 32200ae053aSSrinivas Pandruvada fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL); 32300ae053aSSrinivas Pandruvada if (!fan) { 32400ae053aSSrinivas Pandruvada dev_err(&device->dev, "No memory for fan\n"); 32500ae053aSSrinivas Pandruvada return -ENOMEM; 32600ae053aSSrinivas Pandruvada } 32700ae053aSSrinivas Pandruvada device->driver_data = fan; 32800ae053aSSrinivas Pandruvada platform_set_drvdata(pdev, fan); 32900ae053aSSrinivas Pandruvada 33000ae053aSSrinivas Pandruvada if (acpi_fan_is_acpi4(device)) { 33100ae053aSSrinivas Pandruvada result = acpi_fan_get_fif(device); 33200ae053aSSrinivas Pandruvada if (result) 33300ae053aSSrinivas Pandruvada return result; 33400ae053aSSrinivas Pandruvada 33500ae053aSSrinivas Pandruvada result = acpi_fan_get_fps(device); 33600ae053aSSrinivas Pandruvada if (result) 33700ae053aSSrinivas Pandruvada return result; 33800ae053aSSrinivas Pandruvada 339*35c50d85SArmin Wolf result = devm_acpi_fan_create_hwmon(device); 340*35c50d85SArmin Wolf if (result) 341*35c50d85SArmin Wolf return result; 342*35c50d85SArmin Wolf 34300ae053aSSrinivas Pandruvada result = acpi_fan_create_attributes(device); 34400ae053aSSrinivas Pandruvada if (result) 34500ae053aSSrinivas Pandruvada return result; 34600ae053aSSrinivas Pandruvada 34700ae053aSSrinivas Pandruvada fan->acpi4 = true; 34800ae053aSSrinivas Pandruvada } else { 34900ae053aSSrinivas Pandruvada result = acpi_device_update_power(device, NULL); 35000ae053aSSrinivas Pandruvada if (result) { 35100ae053aSSrinivas Pandruvada dev_err(&device->dev, "Failed to set initial power state\n"); 35200ae053aSSrinivas Pandruvada goto err_end; 35300ae053aSSrinivas Pandruvada } 35400ae053aSSrinivas Pandruvada } 35500ae053aSSrinivas Pandruvada 35600ae053aSSrinivas Pandruvada if (!strncmp(pdev->name, "PNP0C0B", strlen("PNP0C0B"))) 35700ae053aSSrinivas Pandruvada name = "Fan"; 35800ae053aSSrinivas Pandruvada else 35900ae053aSSrinivas Pandruvada name = acpi_device_bid(device); 36000ae053aSSrinivas Pandruvada 36100ae053aSSrinivas Pandruvada cdev = thermal_cooling_device_register(name, device, 36200ae053aSSrinivas Pandruvada &fan_cooling_ops); 36300ae053aSSrinivas Pandruvada if (IS_ERR(cdev)) { 36400ae053aSSrinivas Pandruvada result = PTR_ERR(cdev); 36500ae053aSSrinivas Pandruvada goto err_end; 36600ae053aSSrinivas Pandruvada } 36700ae053aSSrinivas Pandruvada 36800ae053aSSrinivas Pandruvada dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id); 36900ae053aSSrinivas Pandruvada 37000ae053aSSrinivas Pandruvada fan->cdev = cdev; 37100ae053aSSrinivas Pandruvada result = sysfs_create_link(&pdev->dev.kobj, 37200ae053aSSrinivas Pandruvada &cdev->device.kobj, 37300ae053aSSrinivas Pandruvada "thermal_cooling"); 37400ae053aSSrinivas Pandruvada if (result) 37500ae053aSSrinivas Pandruvada dev_err(&pdev->dev, "Failed to create sysfs link 'thermal_cooling'\n"); 37600ae053aSSrinivas Pandruvada 37700ae053aSSrinivas Pandruvada result = sysfs_create_link(&cdev->device.kobj, 37800ae053aSSrinivas Pandruvada &pdev->dev.kobj, 37900ae053aSSrinivas Pandruvada "device"); 38000ae053aSSrinivas Pandruvada if (result) { 38100ae053aSSrinivas Pandruvada dev_err(&pdev->dev, "Failed to create sysfs link 'device'\n"); 38200ae053aSSrinivas Pandruvada goto err_end; 38300ae053aSSrinivas Pandruvada } 38400ae053aSSrinivas Pandruvada 38500ae053aSSrinivas Pandruvada return 0; 38600ae053aSSrinivas Pandruvada 38700ae053aSSrinivas Pandruvada err_end: 38800ae053aSSrinivas Pandruvada if (fan->acpi4) 38900ae053aSSrinivas Pandruvada acpi_fan_delete_attributes(device); 39000ae053aSSrinivas Pandruvada 39100ae053aSSrinivas Pandruvada return result; 39200ae053aSSrinivas Pandruvada } 39300ae053aSSrinivas Pandruvada 39424fd13c0SUwe Kleine-König static void acpi_fan_remove(struct platform_device *pdev) 39500ae053aSSrinivas Pandruvada { 39600ae053aSSrinivas Pandruvada struct acpi_fan *fan = platform_get_drvdata(pdev); 39700ae053aSSrinivas Pandruvada 39800ae053aSSrinivas Pandruvada if (fan->acpi4) { 39900ae053aSSrinivas Pandruvada struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 40000ae053aSSrinivas Pandruvada 40100ae053aSSrinivas Pandruvada acpi_fan_delete_attributes(device); 40200ae053aSSrinivas Pandruvada } 40300ae053aSSrinivas Pandruvada sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling"); 40400ae053aSSrinivas Pandruvada sysfs_remove_link(&fan->cdev->device.kobj, "device"); 40500ae053aSSrinivas Pandruvada thermal_cooling_device_unregister(fan->cdev); 40600ae053aSSrinivas Pandruvada } 40700ae053aSSrinivas Pandruvada 40800ae053aSSrinivas Pandruvada #ifdef CONFIG_PM_SLEEP 40900ae053aSSrinivas Pandruvada static int acpi_fan_suspend(struct device *dev) 41000ae053aSSrinivas Pandruvada { 41100ae053aSSrinivas Pandruvada struct acpi_fan *fan = dev_get_drvdata(dev); 41200ae053aSSrinivas Pandruvada if (fan->acpi4) 41300ae053aSSrinivas Pandruvada return 0; 41400ae053aSSrinivas Pandruvada 41500ae053aSSrinivas Pandruvada acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0); 41600ae053aSSrinivas Pandruvada 41700ae053aSSrinivas Pandruvada return AE_OK; 41800ae053aSSrinivas Pandruvada } 41900ae053aSSrinivas Pandruvada 42000ae053aSSrinivas Pandruvada static int acpi_fan_resume(struct device *dev) 42100ae053aSSrinivas Pandruvada { 42200ae053aSSrinivas Pandruvada int result; 42300ae053aSSrinivas Pandruvada struct acpi_fan *fan = dev_get_drvdata(dev); 42400ae053aSSrinivas Pandruvada 42500ae053aSSrinivas Pandruvada if (fan->acpi4) 42600ae053aSSrinivas Pandruvada return 0; 42700ae053aSSrinivas Pandruvada 42800ae053aSSrinivas Pandruvada result = acpi_device_update_power(ACPI_COMPANION(dev), NULL); 42900ae053aSSrinivas Pandruvada if (result) 43000ae053aSSrinivas Pandruvada dev_err(dev, "Error updating fan power state\n"); 43100ae053aSSrinivas Pandruvada 43200ae053aSSrinivas Pandruvada return result; 43300ae053aSSrinivas Pandruvada } 434f23470e6SUwe Kleine-König 435f23470e6SUwe Kleine-König static const struct dev_pm_ops acpi_fan_pm = { 436f23470e6SUwe Kleine-König .resume = acpi_fan_resume, 437f23470e6SUwe Kleine-König .freeze = acpi_fan_suspend, 438f23470e6SUwe Kleine-König .thaw = acpi_fan_resume, 439f23470e6SUwe Kleine-König .restore = acpi_fan_resume, 440f23470e6SUwe Kleine-König }; 441f23470e6SUwe Kleine-König #define FAN_PM_OPS_PTR (&acpi_fan_pm) 442f23470e6SUwe Kleine-König 443f23470e6SUwe Kleine-König #else 444f23470e6SUwe Kleine-König 445f23470e6SUwe Kleine-König #define FAN_PM_OPS_PTR NULL 446f23470e6SUwe Kleine-König 44700ae053aSSrinivas Pandruvada #endif 44800ae053aSSrinivas Pandruvada 449f23470e6SUwe Kleine-König static struct platform_driver acpi_fan_driver = { 450f23470e6SUwe Kleine-König .probe = acpi_fan_probe, 45124fd13c0SUwe Kleine-König .remove_new = acpi_fan_remove, 452f23470e6SUwe Kleine-König .driver = { 453f23470e6SUwe Kleine-König .name = "acpi-fan", 454f23470e6SUwe Kleine-König .acpi_match_table = fan_device_ids, 455f23470e6SUwe Kleine-König .pm = FAN_PM_OPS_PTR, 456f23470e6SUwe Kleine-König }, 457f23470e6SUwe Kleine-König }; 458f23470e6SUwe Kleine-König 45900ae053aSSrinivas Pandruvada module_platform_driver(acpi_fan_driver); 460f23470e6SUwe Kleine-König 461f23470e6SUwe Kleine-König MODULE_AUTHOR("Paul Diefenbaugh"); 462f23470e6SUwe Kleine-König MODULE_DESCRIPTION("ACPI Fan Driver"); 463f23470e6SUwe Kleine-König MODULE_LICENSE("GPL"); 464