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 MODULE_AUTHOR("Paul Diefenbaugh"); 2300ae053aSSrinivas Pandruvada MODULE_DESCRIPTION("ACPI Fan Driver"); 2400ae053aSSrinivas Pandruvada MODULE_LICENSE("GPL"); 2500ae053aSSrinivas Pandruvada 2600ae053aSSrinivas Pandruvada static int acpi_fan_probe(struct platform_device *pdev); 2700ae053aSSrinivas Pandruvada static int acpi_fan_remove(struct platform_device *pdev); 2800ae053aSSrinivas Pandruvada 2900ae053aSSrinivas Pandruvada static const struct acpi_device_id fan_device_ids[] = { 3000ae053aSSrinivas Pandruvada ACPI_FAN_DEVICE_IDS, 3100ae053aSSrinivas Pandruvada {"", 0}, 3200ae053aSSrinivas Pandruvada }; 3300ae053aSSrinivas Pandruvada MODULE_DEVICE_TABLE(acpi, fan_device_ids); 3400ae053aSSrinivas Pandruvada 3500ae053aSSrinivas Pandruvada #ifdef CONFIG_PM_SLEEP 3600ae053aSSrinivas Pandruvada static int acpi_fan_suspend(struct device *dev); 3700ae053aSSrinivas Pandruvada static int acpi_fan_resume(struct device *dev); 3800ae053aSSrinivas Pandruvada static const struct dev_pm_ops acpi_fan_pm = { 3900ae053aSSrinivas Pandruvada .resume = acpi_fan_resume, 4000ae053aSSrinivas Pandruvada .freeze = acpi_fan_suspend, 4100ae053aSSrinivas Pandruvada .thaw = acpi_fan_resume, 4200ae053aSSrinivas Pandruvada .restore = acpi_fan_resume, 4300ae053aSSrinivas Pandruvada }; 4400ae053aSSrinivas Pandruvada #define FAN_PM_OPS_PTR (&acpi_fan_pm) 4500ae053aSSrinivas Pandruvada #else 4600ae053aSSrinivas Pandruvada #define FAN_PM_OPS_PTR NULL 4700ae053aSSrinivas Pandruvada #endif 4800ae053aSSrinivas Pandruvada 4900ae053aSSrinivas Pandruvada static struct platform_driver acpi_fan_driver = { 5000ae053aSSrinivas Pandruvada .probe = acpi_fan_probe, 5100ae053aSSrinivas Pandruvada .remove = acpi_fan_remove, 5200ae053aSSrinivas Pandruvada .driver = { 5300ae053aSSrinivas Pandruvada .name = "acpi-fan", 5400ae053aSSrinivas Pandruvada .acpi_match_table = fan_device_ids, 5500ae053aSSrinivas Pandruvada .pm = FAN_PM_OPS_PTR, 5600ae053aSSrinivas Pandruvada }, 5700ae053aSSrinivas Pandruvada }; 5800ae053aSSrinivas Pandruvada 5900ae053aSSrinivas Pandruvada /* thermal cooling device callbacks */ 6000ae053aSSrinivas Pandruvada static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long 6100ae053aSSrinivas Pandruvada *state) 6200ae053aSSrinivas Pandruvada { 6300ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 6400ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 6500ae053aSSrinivas Pandruvada 6600ae053aSSrinivas Pandruvada if (fan->acpi4) 6700ae053aSSrinivas Pandruvada *state = fan->fps_count - 1; 6800ae053aSSrinivas Pandruvada else 6900ae053aSSrinivas Pandruvada *state = 1; 7000ae053aSSrinivas Pandruvada return 0; 7100ae053aSSrinivas Pandruvada } 7200ae053aSSrinivas Pandruvada 7300ae053aSSrinivas Pandruvada static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state) 7400ae053aSSrinivas Pandruvada { 7500ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 7600ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 7700ae053aSSrinivas Pandruvada union acpi_object *obj; 7800ae053aSSrinivas Pandruvada acpi_status status; 7900ae053aSSrinivas Pandruvada int control, i; 8000ae053aSSrinivas Pandruvada 8100ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer); 8200ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 8300ae053aSSrinivas Pandruvada dev_err(&device->dev, "Get fan state failed\n"); 8400ae053aSSrinivas Pandruvada return -ENODEV; 8500ae053aSSrinivas Pandruvada } 8600ae053aSSrinivas Pandruvada 8700ae053aSSrinivas Pandruvada obj = buffer.pointer; 8800ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE || 8900ae053aSSrinivas Pandruvada obj->package.count != 3 || 9000ae053aSSrinivas Pandruvada obj->package.elements[1].type != ACPI_TYPE_INTEGER) { 9100ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FST data\n"); 9200ae053aSSrinivas Pandruvada status = -EINVAL; 9300ae053aSSrinivas Pandruvada goto err; 9400ae053aSSrinivas Pandruvada } 9500ae053aSSrinivas Pandruvada 9600ae053aSSrinivas Pandruvada control = obj->package.elements[1].integer.value; 9700ae053aSSrinivas Pandruvada for (i = 0; i < fan->fps_count; i++) { 9800ae053aSSrinivas Pandruvada /* 9900ae053aSSrinivas Pandruvada * When Fine Grain Control is set, return the state 10000ae053aSSrinivas Pandruvada * corresponding to maximum fan->fps[i].control 10100ae053aSSrinivas Pandruvada * value compared to the current speed. Here the 10200ae053aSSrinivas Pandruvada * fan->fps[] is sorted array with increasing speed. 10300ae053aSSrinivas Pandruvada */ 10400ae053aSSrinivas Pandruvada if (fan->fif.fine_grain_ctrl && control < fan->fps[i].control) { 10500ae053aSSrinivas Pandruvada i = (i > 0) ? i - 1 : 0; 10600ae053aSSrinivas Pandruvada break; 10700ae053aSSrinivas Pandruvada } else if (control == fan->fps[i].control) { 10800ae053aSSrinivas Pandruvada break; 10900ae053aSSrinivas Pandruvada } 11000ae053aSSrinivas Pandruvada } 11100ae053aSSrinivas Pandruvada if (i == fan->fps_count) { 11200ae053aSSrinivas Pandruvada dev_dbg(&device->dev, "Invalid control value returned\n"); 11300ae053aSSrinivas Pandruvada status = -EINVAL; 11400ae053aSSrinivas Pandruvada goto err; 11500ae053aSSrinivas Pandruvada } 11600ae053aSSrinivas Pandruvada 11700ae053aSSrinivas Pandruvada *state = i; 11800ae053aSSrinivas Pandruvada 11900ae053aSSrinivas Pandruvada err: 12000ae053aSSrinivas Pandruvada kfree(obj); 12100ae053aSSrinivas Pandruvada return status; 12200ae053aSSrinivas Pandruvada } 12300ae053aSSrinivas Pandruvada 12400ae053aSSrinivas Pandruvada static int fan_get_state(struct acpi_device *device, unsigned long *state) 12500ae053aSSrinivas Pandruvada { 12600ae053aSSrinivas Pandruvada int result; 12700ae053aSSrinivas Pandruvada int acpi_state = ACPI_STATE_D0; 12800ae053aSSrinivas Pandruvada 12900ae053aSSrinivas Pandruvada result = acpi_device_update_power(device, &acpi_state); 13000ae053aSSrinivas Pandruvada if (result) 13100ae053aSSrinivas Pandruvada return result; 13200ae053aSSrinivas Pandruvada 13300ae053aSSrinivas Pandruvada *state = acpi_state == ACPI_STATE_D3_COLD 13400ae053aSSrinivas Pandruvada || acpi_state == ACPI_STATE_D3_HOT ? 13500ae053aSSrinivas Pandruvada 0 : (acpi_state == ACPI_STATE_D0 ? 1 : -1); 13600ae053aSSrinivas Pandruvada return 0; 13700ae053aSSrinivas Pandruvada } 13800ae053aSSrinivas Pandruvada 13900ae053aSSrinivas Pandruvada static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long 14000ae053aSSrinivas Pandruvada *state) 14100ae053aSSrinivas Pandruvada { 14200ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 14300ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 14400ae053aSSrinivas Pandruvada 14500ae053aSSrinivas Pandruvada if (fan->acpi4) 14600ae053aSSrinivas Pandruvada return fan_get_state_acpi4(device, state); 14700ae053aSSrinivas Pandruvada else 14800ae053aSSrinivas Pandruvada return fan_get_state(device, state); 14900ae053aSSrinivas Pandruvada } 15000ae053aSSrinivas Pandruvada 15100ae053aSSrinivas Pandruvada static int fan_set_state(struct acpi_device *device, unsigned long state) 15200ae053aSSrinivas Pandruvada { 15300ae053aSSrinivas Pandruvada if (state != 0 && state != 1) 15400ae053aSSrinivas Pandruvada return -EINVAL; 15500ae053aSSrinivas Pandruvada 15600ae053aSSrinivas Pandruvada return acpi_device_set_power(device, 15700ae053aSSrinivas Pandruvada state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD); 15800ae053aSSrinivas Pandruvada } 15900ae053aSSrinivas Pandruvada 16000ae053aSSrinivas Pandruvada static int fan_set_state_acpi4(struct acpi_device *device, unsigned long state) 16100ae053aSSrinivas Pandruvada { 16200ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 16300ae053aSSrinivas Pandruvada acpi_status status; 16400ae053aSSrinivas Pandruvada 16500ae053aSSrinivas Pandruvada if (state >= fan->fps_count) 16600ae053aSSrinivas Pandruvada return -EINVAL; 16700ae053aSSrinivas Pandruvada 16800ae053aSSrinivas Pandruvada status = acpi_execute_simple_method(device->handle, "_FSL", 16900ae053aSSrinivas Pandruvada fan->fps[state].control); 17000ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 17100ae053aSSrinivas Pandruvada dev_dbg(&device->dev, "Failed to set state by _FSL\n"); 17200ae053aSSrinivas Pandruvada return -ENODEV; 17300ae053aSSrinivas Pandruvada } 17400ae053aSSrinivas Pandruvada 17500ae053aSSrinivas Pandruvada return 0; 17600ae053aSSrinivas Pandruvada } 17700ae053aSSrinivas Pandruvada 17800ae053aSSrinivas Pandruvada static int 17900ae053aSSrinivas Pandruvada fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) 18000ae053aSSrinivas Pandruvada { 18100ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 18200ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 18300ae053aSSrinivas Pandruvada 18400ae053aSSrinivas Pandruvada if (fan->acpi4) 18500ae053aSSrinivas Pandruvada return fan_set_state_acpi4(device, state); 18600ae053aSSrinivas Pandruvada else 18700ae053aSSrinivas Pandruvada return fan_set_state(device, state); 18800ae053aSSrinivas Pandruvada } 18900ae053aSSrinivas Pandruvada 19000ae053aSSrinivas Pandruvada static const struct thermal_cooling_device_ops fan_cooling_ops = { 19100ae053aSSrinivas Pandruvada .get_max_state = fan_get_max_state, 19200ae053aSSrinivas Pandruvada .get_cur_state = fan_get_cur_state, 19300ae053aSSrinivas Pandruvada .set_cur_state = fan_set_cur_state, 19400ae053aSSrinivas Pandruvada }; 19500ae053aSSrinivas Pandruvada 19600ae053aSSrinivas Pandruvada /* -------------------------------------------------------------------------- 19700ae053aSSrinivas Pandruvada * Driver Interface 19800ae053aSSrinivas Pandruvada * -------------------------------------------------------------------------- 19900ae053aSSrinivas Pandruvada */ 20000ae053aSSrinivas Pandruvada 20100ae053aSSrinivas Pandruvada static bool acpi_fan_is_acpi4(struct acpi_device *device) 20200ae053aSSrinivas Pandruvada { 20300ae053aSSrinivas Pandruvada return acpi_has_method(device->handle, "_FIF") && 20400ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FPS") && 20500ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FSL") && 20600ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FST"); 20700ae053aSSrinivas Pandruvada } 20800ae053aSSrinivas Pandruvada 20900ae053aSSrinivas Pandruvada static int acpi_fan_get_fif(struct acpi_device *device) 21000ae053aSSrinivas Pandruvada { 21100ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 21200ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 21300ae053aSSrinivas Pandruvada struct acpi_buffer format = { sizeof("NNNN"), "NNNN" }; 214*d445571fSSrinivas Pandruvada u64 fields[4]; 215*d445571fSSrinivas Pandruvada struct acpi_buffer fif = { sizeof(fields), fields }; 21600ae053aSSrinivas Pandruvada union acpi_object *obj; 21700ae053aSSrinivas Pandruvada acpi_status status; 21800ae053aSSrinivas Pandruvada 21900ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer); 22000ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) 22100ae053aSSrinivas Pandruvada return status; 22200ae053aSSrinivas Pandruvada 22300ae053aSSrinivas Pandruvada obj = buffer.pointer; 22400ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE) { 22500ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FIF data\n"); 22600ae053aSSrinivas Pandruvada status = -EINVAL; 22700ae053aSSrinivas Pandruvada goto err; 22800ae053aSSrinivas Pandruvada } 22900ae053aSSrinivas Pandruvada 23000ae053aSSrinivas Pandruvada status = acpi_extract_package(obj, &format, &fif); 23100ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 23200ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FIF element\n"); 23300ae053aSSrinivas Pandruvada status = -EINVAL; 23400ae053aSSrinivas Pandruvada } 23500ae053aSSrinivas Pandruvada 236*d445571fSSrinivas Pandruvada fan->fif.revision = fields[0]; 237*d445571fSSrinivas Pandruvada fan->fif.fine_grain_ctrl = fields[1]; 238*d445571fSSrinivas Pandruvada fan->fif.step_size = fields[2]; 239*d445571fSSrinivas Pandruvada fan->fif.low_speed_notification = fields[3]; 240*d445571fSSrinivas Pandruvada 24100ae053aSSrinivas Pandruvada err: 24200ae053aSSrinivas Pandruvada kfree(obj); 24300ae053aSSrinivas Pandruvada return status; 24400ae053aSSrinivas Pandruvada } 24500ae053aSSrinivas Pandruvada 24600ae053aSSrinivas Pandruvada static int acpi_fan_speed_cmp(const void *a, const void *b) 24700ae053aSSrinivas Pandruvada { 24800ae053aSSrinivas Pandruvada const struct acpi_fan_fps *fps1 = a; 24900ae053aSSrinivas Pandruvada const struct acpi_fan_fps *fps2 = b; 25000ae053aSSrinivas Pandruvada return fps1->speed - fps2->speed; 25100ae053aSSrinivas Pandruvada } 25200ae053aSSrinivas Pandruvada 25300ae053aSSrinivas Pandruvada static int acpi_fan_get_fps(struct acpi_device *device) 25400ae053aSSrinivas Pandruvada { 25500ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 25600ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 25700ae053aSSrinivas Pandruvada union acpi_object *obj; 25800ae053aSSrinivas Pandruvada acpi_status status; 25900ae053aSSrinivas Pandruvada int i; 26000ae053aSSrinivas Pandruvada 26100ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer); 26200ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) 26300ae053aSSrinivas Pandruvada return status; 26400ae053aSSrinivas Pandruvada 26500ae053aSSrinivas Pandruvada obj = buffer.pointer; 26600ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) { 26700ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FPS data\n"); 26800ae053aSSrinivas Pandruvada status = -EINVAL; 26900ae053aSSrinivas Pandruvada goto err; 27000ae053aSSrinivas Pandruvada } 27100ae053aSSrinivas Pandruvada 27200ae053aSSrinivas Pandruvada fan->fps_count = obj->package.count - 1; /* minus revision field */ 27300ae053aSSrinivas Pandruvada fan->fps = devm_kcalloc(&device->dev, 27400ae053aSSrinivas Pandruvada fan->fps_count, sizeof(struct acpi_fan_fps), 27500ae053aSSrinivas Pandruvada GFP_KERNEL); 27600ae053aSSrinivas Pandruvada if (!fan->fps) { 27700ae053aSSrinivas Pandruvada dev_err(&device->dev, "Not enough memory\n"); 27800ae053aSSrinivas Pandruvada status = -ENOMEM; 27900ae053aSSrinivas Pandruvada goto err; 28000ae053aSSrinivas Pandruvada } 28100ae053aSSrinivas Pandruvada for (i = 0; i < fan->fps_count; i++) { 28200ae053aSSrinivas Pandruvada struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" }; 28300ae053aSSrinivas Pandruvada struct acpi_buffer fps = { offsetof(struct acpi_fan_fps, name), 28400ae053aSSrinivas Pandruvada &fan->fps[i] }; 28500ae053aSSrinivas Pandruvada status = acpi_extract_package(&obj->package.elements[i + 1], 28600ae053aSSrinivas Pandruvada &format, &fps); 28700ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 28800ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FPS element\n"); 28900ae053aSSrinivas Pandruvada goto err; 29000ae053aSSrinivas Pandruvada } 29100ae053aSSrinivas Pandruvada } 29200ae053aSSrinivas Pandruvada 29300ae053aSSrinivas Pandruvada /* sort the state array according to fan speed in increase order */ 29400ae053aSSrinivas Pandruvada sort(fan->fps, fan->fps_count, sizeof(*fan->fps), 29500ae053aSSrinivas Pandruvada acpi_fan_speed_cmp, NULL); 29600ae053aSSrinivas Pandruvada 29700ae053aSSrinivas Pandruvada err: 29800ae053aSSrinivas Pandruvada kfree(obj); 29900ae053aSSrinivas Pandruvada return status; 30000ae053aSSrinivas Pandruvada } 30100ae053aSSrinivas Pandruvada 30200ae053aSSrinivas Pandruvada static int acpi_fan_probe(struct platform_device *pdev) 30300ae053aSSrinivas Pandruvada { 30400ae053aSSrinivas Pandruvada int result = 0; 30500ae053aSSrinivas Pandruvada struct thermal_cooling_device *cdev; 30600ae053aSSrinivas Pandruvada struct acpi_fan *fan; 30700ae053aSSrinivas Pandruvada struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 30800ae053aSSrinivas Pandruvada char *name; 30900ae053aSSrinivas Pandruvada 31000ae053aSSrinivas Pandruvada fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL); 31100ae053aSSrinivas Pandruvada if (!fan) { 31200ae053aSSrinivas Pandruvada dev_err(&device->dev, "No memory for fan\n"); 31300ae053aSSrinivas Pandruvada return -ENOMEM; 31400ae053aSSrinivas Pandruvada } 31500ae053aSSrinivas Pandruvada device->driver_data = fan; 31600ae053aSSrinivas Pandruvada platform_set_drvdata(pdev, fan); 31700ae053aSSrinivas Pandruvada 31800ae053aSSrinivas Pandruvada if (acpi_fan_is_acpi4(device)) { 31900ae053aSSrinivas Pandruvada result = acpi_fan_get_fif(device); 32000ae053aSSrinivas Pandruvada if (result) 32100ae053aSSrinivas Pandruvada return result; 32200ae053aSSrinivas Pandruvada 32300ae053aSSrinivas Pandruvada result = acpi_fan_get_fps(device); 32400ae053aSSrinivas Pandruvada if (result) 32500ae053aSSrinivas Pandruvada return result; 32600ae053aSSrinivas Pandruvada 32700ae053aSSrinivas Pandruvada result = acpi_fan_create_attributes(device); 32800ae053aSSrinivas Pandruvada if (result) 32900ae053aSSrinivas Pandruvada return result; 33000ae053aSSrinivas Pandruvada 33100ae053aSSrinivas Pandruvada fan->acpi4 = true; 33200ae053aSSrinivas Pandruvada } else { 33300ae053aSSrinivas Pandruvada result = acpi_device_update_power(device, NULL); 33400ae053aSSrinivas Pandruvada if (result) { 33500ae053aSSrinivas Pandruvada dev_err(&device->dev, "Failed to set initial power state\n"); 33600ae053aSSrinivas Pandruvada goto err_end; 33700ae053aSSrinivas Pandruvada } 33800ae053aSSrinivas Pandruvada } 33900ae053aSSrinivas Pandruvada 34000ae053aSSrinivas Pandruvada if (!strncmp(pdev->name, "PNP0C0B", strlen("PNP0C0B"))) 34100ae053aSSrinivas Pandruvada name = "Fan"; 34200ae053aSSrinivas Pandruvada else 34300ae053aSSrinivas Pandruvada name = acpi_device_bid(device); 34400ae053aSSrinivas Pandruvada 34500ae053aSSrinivas Pandruvada cdev = thermal_cooling_device_register(name, device, 34600ae053aSSrinivas Pandruvada &fan_cooling_ops); 34700ae053aSSrinivas Pandruvada if (IS_ERR(cdev)) { 34800ae053aSSrinivas Pandruvada result = PTR_ERR(cdev); 34900ae053aSSrinivas Pandruvada goto err_end; 35000ae053aSSrinivas Pandruvada } 35100ae053aSSrinivas Pandruvada 35200ae053aSSrinivas Pandruvada dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id); 35300ae053aSSrinivas Pandruvada 35400ae053aSSrinivas Pandruvada fan->cdev = cdev; 35500ae053aSSrinivas Pandruvada result = sysfs_create_link(&pdev->dev.kobj, 35600ae053aSSrinivas Pandruvada &cdev->device.kobj, 35700ae053aSSrinivas Pandruvada "thermal_cooling"); 35800ae053aSSrinivas Pandruvada if (result) 35900ae053aSSrinivas Pandruvada dev_err(&pdev->dev, "Failed to create sysfs link 'thermal_cooling'\n"); 36000ae053aSSrinivas Pandruvada 36100ae053aSSrinivas Pandruvada result = sysfs_create_link(&cdev->device.kobj, 36200ae053aSSrinivas Pandruvada &pdev->dev.kobj, 36300ae053aSSrinivas Pandruvada "device"); 36400ae053aSSrinivas Pandruvada if (result) { 36500ae053aSSrinivas Pandruvada dev_err(&pdev->dev, "Failed to create sysfs link 'device'\n"); 36600ae053aSSrinivas Pandruvada goto err_end; 36700ae053aSSrinivas Pandruvada } 36800ae053aSSrinivas Pandruvada 36900ae053aSSrinivas Pandruvada return 0; 37000ae053aSSrinivas Pandruvada 37100ae053aSSrinivas Pandruvada err_end: 37200ae053aSSrinivas Pandruvada if (fan->acpi4) 37300ae053aSSrinivas Pandruvada acpi_fan_delete_attributes(device); 37400ae053aSSrinivas Pandruvada 37500ae053aSSrinivas Pandruvada return result; 37600ae053aSSrinivas Pandruvada } 37700ae053aSSrinivas Pandruvada 37800ae053aSSrinivas Pandruvada static int acpi_fan_remove(struct platform_device *pdev) 37900ae053aSSrinivas Pandruvada { 38000ae053aSSrinivas Pandruvada struct acpi_fan *fan = platform_get_drvdata(pdev); 38100ae053aSSrinivas Pandruvada 38200ae053aSSrinivas Pandruvada if (fan->acpi4) { 38300ae053aSSrinivas Pandruvada struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 38400ae053aSSrinivas Pandruvada 38500ae053aSSrinivas Pandruvada acpi_fan_delete_attributes(device); 38600ae053aSSrinivas Pandruvada } 38700ae053aSSrinivas Pandruvada sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling"); 38800ae053aSSrinivas Pandruvada sysfs_remove_link(&fan->cdev->device.kobj, "device"); 38900ae053aSSrinivas Pandruvada thermal_cooling_device_unregister(fan->cdev); 39000ae053aSSrinivas Pandruvada 39100ae053aSSrinivas Pandruvada return 0; 39200ae053aSSrinivas Pandruvada } 39300ae053aSSrinivas Pandruvada 39400ae053aSSrinivas Pandruvada #ifdef CONFIG_PM_SLEEP 39500ae053aSSrinivas Pandruvada static int acpi_fan_suspend(struct device *dev) 39600ae053aSSrinivas Pandruvada { 39700ae053aSSrinivas Pandruvada struct acpi_fan *fan = dev_get_drvdata(dev); 39800ae053aSSrinivas Pandruvada if (fan->acpi4) 39900ae053aSSrinivas Pandruvada return 0; 40000ae053aSSrinivas Pandruvada 40100ae053aSSrinivas Pandruvada acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0); 40200ae053aSSrinivas Pandruvada 40300ae053aSSrinivas Pandruvada return AE_OK; 40400ae053aSSrinivas Pandruvada } 40500ae053aSSrinivas Pandruvada 40600ae053aSSrinivas Pandruvada static int acpi_fan_resume(struct device *dev) 40700ae053aSSrinivas Pandruvada { 40800ae053aSSrinivas Pandruvada int result; 40900ae053aSSrinivas Pandruvada struct acpi_fan *fan = dev_get_drvdata(dev); 41000ae053aSSrinivas Pandruvada 41100ae053aSSrinivas Pandruvada if (fan->acpi4) 41200ae053aSSrinivas Pandruvada return 0; 41300ae053aSSrinivas Pandruvada 41400ae053aSSrinivas Pandruvada result = acpi_device_update_power(ACPI_COMPANION(dev), NULL); 41500ae053aSSrinivas Pandruvada if (result) 41600ae053aSSrinivas Pandruvada dev_err(dev, "Error updating fan power state\n"); 41700ae053aSSrinivas Pandruvada 41800ae053aSSrinivas Pandruvada return result; 41900ae053aSSrinivas Pandruvada } 42000ae053aSSrinivas Pandruvada #endif 42100ae053aSSrinivas Pandruvada 42200ae053aSSrinivas Pandruvada module_platform_driver(acpi_fan_driver); 423