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 66bea2d986SSrinivas Pandruvada if (fan->acpi4) { 67bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) 68bea2d986SSrinivas Pandruvada *state = 100 / fan->fif.step_size; 6900ae053aSSrinivas Pandruvada else 70bea2d986SSrinivas Pandruvada *state = fan->fps_count - 1; 71bea2d986SSrinivas Pandruvada } else { 7200ae053aSSrinivas Pandruvada *state = 1; 73bea2d986SSrinivas Pandruvada } 74bea2d986SSrinivas Pandruvada 7500ae053aSSrinivas Pandruvada return 0; 7600ae053aSSrinivas Pandruvada } 7700ae053aSSrinivas Pandruvada 78*f1197343SSrinivas Pandruvada int acpi_fan_get_fst(struct acpi_device *device, struct acpi_fan_fst *fst) 7900ae053aSSrinivas Pandruvada { 8000ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 8100ae053aSSrinivas Pandruvada union acpi_object *obj; 8200ae053aSSrinivas Pandruvada acpi_status status; 83bea2d986SSrinivas Pandruvada int ret = 0; 8400ae053aSSrinivas Pandruvada 8500ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer); 8600ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 8700ae053aSSrinivas Pandruvada dev_err(&device->dev, "Get fan state failed\n"); 8800ae053aSSrinivas Pandruvada return -ENODEV; 8900ae053aSSrinivas Pandruvada } 9000ae053aSSrinivas Pandruvada 9100ae053aSSrinivas Pandruvada obj = buffer.pointer; 9200ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE || 9300ae053aSSrinivas Pandruvada obj->package.count != 3 || 9400ae053aSSrinivas Pandruvada obj->package.elements[1].type != ACPI_TYPE_INTEGER) { 9500ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FST data\n"); 96bea2d986SSrinivas Pandruvada ret = -EINVAL; 9700ae053aSSrinivas Pandruvada goto err; 9800ae053aSSrinivas Pandruvada } 9900ae053aSSrinivas Pandruvada 100bea2d986SSrinivas Pandruvada fst->revision = obj->package.elements[0].integer.value; 101bea2d986SSrinivas Pandruvada fst->control = obj->package.elements[1].integer.value; 102bea2d986SSrinivas Pandruvada fst->speed = obj->package.elements[2].integer.value; 103bea2d986SSrinivas Pandruvada 104bea2d986SSrinivas Pandruvada err: 105bea2d986SSrinivas Pandruvada kfree(obj); 106bea2d986SSrinivas Pandruvada return ret; 10700ae053aSSrinivas Pandruvada } 108bea2d986SSrinivas Pandruvada 109bea2d986SSrinivas Pandruvada static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state) 110bea2d986SSrinivas Pandruvada { 111bea2d986SSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 112bea2d986SSrinivas Pandruvada struct acpi_fan_fst fst; 113bea2d986SSrinivas Pandruvada int status, i; 114bea2d986SSrinivas Pandruvada 115bea2d986SSrinivas Pandruvada status = acpi_fan_get_fst(device, &fst); 116bea2d986SSrinivas Pandruvada if (status) 117bea2d986SSrinivas Pandruvada return status; 118bea2d986SSrinivas Pandruvada 119bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) { 120bea2d986SSrinivas Pandruvada /* This control should be same what we set using _FSL by spec */ 121bea2d986SSrinivas Pandruvada if (fst.control > 100) { 122bea2d986SSrinivas Pandruvada dev_dbg(&device->dev, "Invalid control value returned\n"); 123bea2d986SSrinivas Pandruvada goto match_fps; 124bea2d986SSrinivas Pandruvada } 125bea2d986SSrinivas Pandruvada 126bea2d986SSrinivas Pandruvada *state = (int) fst.control / fan->fif.step_size; 127bea2d986SSrinivas Pandruvada return 0; 128bea2d986SSrinivas Pandruvada } 129bea2d986SSrinivas Pandruvada 130bea2d986SSrinivas Pandruvada match_fps: 131bea2d986SSrinivas Pandruvada for (i = 0; i < fan->fps_count; i++) { 132bea2d986SSrinivas Pandruvada if (fst.control == fan->fps[i].control) 133bea2d986SSrinivas Pandruvada break; 13400ae053aSSrinivas Pandruvada } 13500ae053aSSrinivas Pandruvada if (i == fan->fps_count) { 13600ae053aSSrinivas Pandruvada dev_dbg(&device->dev, "Invalid control value returned\n"); 137bea2d986SSrinivas Pandruvada return -EINVAL; 13800ae053aSSrinivas Pandruvada } 13900ae053aSSrinivas Pandruvada 14000ae053aSSrinivas Pandruvada *state = i; 14100ae053aSSrinivas Pandruvada 14200ae053aSSrinivas Pandruvada return status; 14300ae053aSSrinivas Pandruvada } 14400ae053aSSrinivas Pandruvada 14500ae053aSSrinivas Pandruvada static int fan_get_state(struct acpi_device *device, unsigned long *state) 14600ae053aSSrinivas Pandruvada { 14700ae053aSSrinivas Pandruvada int result; 14800ae053aSSrinivas Pandruvada int acpi_state = ACPI_STATE_D0; 14900ae053aSSrinivas Pandruvada 15000ae053aSSrinivas Pandruvada result = acpi_device_update_power(device, &acpi_state); 15100ae053aSSrinivas Pandruvada if (result) 15200ae053aSSrinivas Pandruvada return result; 15300ae053aSSrinivas Pandruvada 15400ae053aSSrinivas Pandruvada *state = acpi_state == ACPI_STATE_D3_COLD 15500ae053aSSrinivas Pandruvada || acpi_state == ACPI_STATE_D3_HOT ? 15600ae053aSSrinivas Pandruvada 0 : (acpi_state == ACPI_STATE_D0 ? 1 : -1); 15700ae053aSSrinivas Pandruvada return 0; 15800ae053aSSrinivas Pandruvada } 15900ae053aSSrinivas Pandruvada 16000ae053aSSrinivas Pandruvada static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long 16100ae053aSSrinivas Pandruvada *state) 16200ae053aSSrinivas Pandruvada { 16300ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 16400ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 16500ae053aSSrinivas Pandruvada 16600ae053aSSrinivas Pandruvada if (fan->acpi4) 16700ae053aSSrinivas Pandruvada return fan_get_state_acpi4(device, state); 16800ae053aSSrinivas Pandruvada else 16900ae053aSSrinivas Pandruvada return fan_get_state(device, state); 17000ae053aSSrinivas Pandruvada } 17100ae053aSSrinivas Pandruvada 17200ae053aSSrinivas Pandruvada static int fan_set_state(struct acpi_device *device, unsigned long state) 17300ae053aSSrinivas Pandruvada { 17400ae053aSSrinivas Pandruvada if (state != 0 && state != 1) 17500ae053aSSrinivas Pandruvada return -EINVAL; 17600ae053aSSrinivas Pandruvada 17700ae053aSSrinivas Pandruvada return acpi_device_set_power(device, 17800ae053aSSrinivas Pandruvada state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD); 17900ae053aSSrinivas Pandruvada } 18000ae053aSSrinivas Pandruvada 18100ae053aSSrinivas Pandruvada static int fan_set_state_acpi4(struct acpi_device *device, unsigned long state) 18200ae053aSSrinivas Pandruvada { 18300ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 18400ae053aSSrinivas Pandruvada acpi_status status; 185bea2d986SSrinivas Pandruvada u64 value = state; 186bea2d986SSrinivas Pandruvada int max_state; 18700ae053aSSrinivas Pandruvada 188bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) 189bea2d986SSrinivas Pandruvada max_state = 100 / fan->fif.step_size; 190bea2d986SSrinivas Pandruvada else 191bea2d986SSrinivas Pandruvada max_state = fan->fps_count - 1; 192bea2d986SSrinivas Pandruvada 193bea2d986SSrinivas Pandruvada if (state > max_state) 19400ae053aSSrinivas Pandruvada return -EINVAL; 19500ae053aSSrinivas Pandruvada 196bea2d986SSrinivas Pandruvada if (fan->fif.fine_grain_ctrl) { 197bea2d986SSrinivas Pandruvada value *= fan->fif.step_size; 198bea2d986SSrinivas Pandruvada /* Spec allows compensate the last step only */ 199bea2d986SSrinivas Pandruvada if (value + fan->fif.step_size > 100) 200bea2d986SSrinivas Pandruvada value = 100; 201bea2d986SSrinivas Pandruvada } else { 202bea2d986SSrinivas Pandruvada value = fan->fps[state].control; 203bea2d986SSrinivas Pandruvada } 204bea2d986SSrinivas Pandruvada 205bea2d986SSrinivas Pandruvada status = acpi_execute_simple_method(device->handle, "_FSL", value); 20600ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 20700ae053aSSrinivas Pandruvada dev_dbg(&device->dev, "Failed to set state by _FSL\n"); 20800ae053aSSrinivas Pandruvada return -ENODEV; 20900ae053aSSrinivas Pandruvada } 21000ae053aSSrinivas Pandruvada 21100ae053aSSrinivas Pandruvada return 0; 21200ae053aSSrinivas Pandruvada } 21300ae053aSSrinivas Pandruvada 21400ae053aSSrinivas Pandruvada static int 21500ae053aSSrinivas Pandruvada fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) 21600ae053aSSrinivas Pandruvada { 21700ae053aSSrinivas Pandruvada struct acpi_device *device = cdev->devdata; 21800ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 21900ae053aSSrinivas Pandruvada 22000ae053aSSrinivas Pandruvada if (fan->acpi4) 22100ae053aSSrinivas Pandruvada return fan_set_state_acpi4(device, state); 22200ae053aSSrinivas Pandruvada else 22300ae053aSSrinivas Pandruvada return fan_set_state(device, state); 22400ae053aSSrinivas Pandruvada } 22500ae053aSSrinivas Pandruvada 22600ae053aSSrinivas Pandruvada static const struct thermal_cooling_device_ops fan_cooling_ops = { 22700ae053aSSrinivas Pandruvada .get_max_state = fan_get_max_state, 22800ae053aSSrinivas Pandruvada .get_cur_state = fan_get_cur_state, 22900ae053aSSrinivas Pandruvada .set_cur_state = fan_set_cur_state, 23000ae053aSSrinivas Pandruvada }; 23100ae053aSSrinivas Pandruvada 23200ae053aSSrinivas Pandruvada /* -------------------------------------------------------------------------- 23300ae053aSSrinivas Pandruvada * Driver Interface 23400ae053aSSrinivas Pandruvada * -------------------------------------------------------------------------- 23500ae053aSSrinivas Pandruvada */ 23600ae053aSSrinivas Pandruvada 23700ae053aSSrinivas Pandruvada static bool acpi_fan_is_acpi4(struct acpi_device *device) 23800ae053aSSrinivas Pandruvada { 23900ae053aSSrinivas Pandruvada return acpi_has_method(device->handle, "_FIF") && 24000ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FPS") && 24100ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FSL") && 24200ae053aSSrinivas Pandruvada acpi_has_method(device->handle, "_FST"); 24300ae053aSSrinivas Pandruvada } 24400ae053aSSrinivas Pandruvada 24500ae053aSSrinivas Pandruvada static int acpi_fan_get_fif(struct acpi_device *device) 24600ae053aSSrinivas Pandruvada { 24700ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 24800ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 24900ae053aSSrinivas Pandruvada struct acpi_buffer format = { sizeof("NNNN"), "NNNN" }; 250d445571fSSrinivas Pandruvada u64 fields[4]; 251d445571fSSrinivas Pandruvada struct acpi_buffer fif = { sizeof(fields), fields }; 25200ae053aSSrinivas Pandruvada union acpi_object *obj; 25300ae053aSSrinivas Pandruvada acpi_status status; 25400ae053aSSrinivas Pandruvada 25500ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer); 25600ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) 25700ae053aSSrinivas Pandruvada return status; 25800ae053aSSrinivas Pandruvada 25900ae053aSSrinivas Pandruvada obj = buffer.pointer; 26000ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE) { 26100ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FIF data\n"); 26200ae053aSSrinivas Pandruvada status = -EINVAL; 26300ae053aSSrinivas Pandruvada goto err; 26400ae053aSSrinivas Pandruvada } 26500ae053aSSrinivas Pandruvada 26600ae053aSSrinivas Pandruvada status = acpi_extract_package(obj, &format, &fif); 26700ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 26800ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FIF element\n"); 26900ae053aSSrinivas Pandruvada status = -EINVAL; 27000ae053aSSrinivas Pandruvada } 27100ae053aSSrinivas Pandruvada 272d445571fSSrinivas Pandruvada fan->fif.revision = fields[0]; 273d445571fSSrinivas Pandruvada fan->fif.fine_grain_ctrl = fields[1]; 274d445571fSSrinivas Pandruvada fan->fif.step_size = fields[2]; 275d445571fSSrinivas Pandruvada fan->fif.low_speed_notification = fields[3]; 276d445571fSSrinivas Pandruvada 277bea2d986SSrinivas Pandruvada /* If there is a bug in step size and set as 0, change to 1 */ 278bea2d986SSrinivas Pandruvada if (!fan->fif.step_size) 279bea2d986SSrinivas Pandruvada fan->fif.step_size = 1; 280bea2d986SSrinivas Pandruvada /* If step size > 9, change to 9 (by spec valid values 1-9) */ 281bea2d986SSrinivas Pandruvada else if (fan->fif.step_size > 9) 282bea2d986SSrinivas Pandruvada fan->fif.step_size = 9; 28300ae053aSSrinivas Pandruvada err: 28400ae053aSSrinivas Pandruvada kfree(obj); 28500ae053aSSrinivas Pandruvada return status; 28600ae053aSSrinivas Pandruvada } 28700ae053aSSrinivas Pandruvada 28800ae053aSSrinivas Pandruvada static int acpi_fan_speed_cmp(const void *a, const void *b) 28900ae053aSSrinivas Pandruvada { 29000ae053aSSrinivas Pandruvada const struct acpi_fan_fps *fps1 = a; 29100ae053aSSrinivas Pandruvada const struct acpi_fan_fps *fps2 = b; 29200ae053aSSrinivas Pandruvada return fps1->speed - fps2->speed; 29300ae053aSSrinivas Pandruvada } 29400ae053aSSrinivas Pandruvada 29500ae053aSSrinivas Pandruvada static int acpi_fan_get_fps(struct acpi_device *device) 29600ae053aSSrinivas Pandruvada { 29700ae053aSSrinivas Pandruvada struct acpi_fan *fan = acpi_driver_data(device); 29800ae053aSSrinivas Pandruvada struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 29900ae053aSSrinivas Pandruvada union acpi_object *obj; 30000ae053aSSrinivas Pandruvada acpi_status status; 30100ae053aSSrinivas Pandruvada int i; 30200ae053aSSrinivas Pandruvada 30300ae053aSSrinivas Pandruvada status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer); 30400ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) 30500ae053aSSrinivas Pandruvada return status; 30600ae053aSSrinivas Pandruvada 30700ae053aSSrinivas Pandruvada obj = buffer.pointer; 30800ae053aSSrinivas Pandruvada if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) { 30900ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FPS data\n"); 31000ae053aSSrinivas Pandruvada status = -EINVAL; 31100ae053aSSrinivas Pandruvada goto err; 31200ae053aSSrinivas Pandruvada } 31300ae053aSSrinivas Pandruvada 31400ae053aSSrinivas Pandruvada fan->fps_count = obj->package.count - 1; /* minus revision field */ 31500ae053aSSrinivas Pandruvada fan->fps = devm_kcalloc(&device->dev, 31600ae053aSSrinivas Pandruvada fan->fps_count, sizeof(struct acpi_fan_fps), 31700ae053aSSrinivas Pandruvada GFP_KERNEL); 31800ae053aSSrinivas Pandruvada if (!fan->fps) { 31900ae053aSSrinivas Pandruvada dev_err(&device->dev, "Not enough memory\n"); 32000ae053aSSrinivas Pandruvada status = -ENOMEM; 32100ae053aSSrinivas Pandruvada goto err; 32200ae053aSSrinivas Pandruvada } 32300ae053aSSrinivas Pandruvada for (i = 0; i < fan->fps_count; i++) { 32400ae053aSSrinivas Pandruvada struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" }; 32500ae053aSSrinivas Pandruvada struct acpi_buffer fps = { offsetof(struct acpi_fan_fps, name), 32600ae053aSSrinivas Pandruvada &fan->fps[i] }; 32700ae053aSSrinivas Pandruvada status = acpi_extract_package(&obj->package.elements[i + 1], 32800ae053aSSrinivas Pandruvada &format, &fps); 32900ae053aSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 33000ae053aSSrinivas Pandruvada dev_err(&device->dev, "Invalid _FPS element\n"); 33100ae053aSSrinivas Pandruvada goto err; 33200ae053aSSrinivas Pandruvada } 33300ae053aSSrinivas Pandruvada } 33400ae053aSSrinivas Pandruvada 33500ae053aSSrinivas Pandruvada /* sort the state array according to fan speed in increase order */ 33600ae053aSSrinivas Pandruvada sort(fan->fps, fan->fps_count, sizeof(*fan->fps), 33700ae053aSSrinivas Pandruvada acpi_fan_speed_cmp, NULL); 33800ae053aSSrinivas Pandruvada 33900ae053aSSrinivas Pandruvada err: 34000ae053aSSrinivas Pandruvada kfree(obj); 34100ae053aSSrinivas Pandruvada return status; 34200ae053aSSrinivas Pandruvada } 34300ae053aSSrinivas Pandruvada 34400ae053aSSrinivas Pandruvada static int acpi_fan_probe(struct platform_device *pdev) 34500ae053aSSrinivas Pandruvada { 34600ae053aSSrinivas Pandruvada int result = 0; 34700ae053aSSrinivas Pandruvada struct thermal_cooling_device *cdev; 34800ae053aSSrinivas Pandruvada struct acpi_fan *fan; 34900ae053aSSrinivas Pandruvada struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 35000ae053aSSrinivas Pandruvada char *name; 35100ae053aSSrinivas Pandruvada 35200ae053aSSrinivas Pandruvada fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL); 35300ae053aSSrinivas Pandruvada if (!fan) { 35400ae053aSSrinivas Pandruvada dev_err(&device->dev, "No memory for fan\n"); 35500ae053aSSrinivas Pandruvada return -ENOMEM; 35600ae053aSSrinivas Pandruvada } 35700ae053aSSrinivas Pandruvada device->driver_data = fan; 35800ae053aSSrinivas Pandruvada platform_set_drvdata(pdev, fan); 35900ae053aSSrinivas Pandruvada 36000ae053aSSrinivas Pandruvada if (acpi_fan_is_acpi4(device)) { 36100ae053aSSrinivas Pandruvada result = acpi_fan_get_fif(device); 36200ae053aSSrinivas Pandruvada if (result) 36300ae053aSSrinivas Pandruvada return result; 36400ae053aSSrinivas Pandruvada 36500ae053aSSrinivas Pandruvada result = acpi_fan_get_fps(device); 36600ae053aSSrinivas Pandruvada if (result) 36700ae053aSSrinivas Pandruvada return result; 36800ae053aSSrinivas Pandruvada 36900ae053aSSrinivas Pandruvada result = acpi_fan_create_attributes(device); 37000ae053aSSrinivas Pandruvada if (result) 37100ae053aSSrinivas Pandruvada return result; 37200ae053aSSrinivas Pandruvada 37300ae053aSSrinivas Pandruvada fan->acpi4 = true; 37400ae053aSSrinivas Pandruvada } else { 37500ae053aSSrinivas Pandruvada result = acpi_device_update_power(device, NULL); 37600ae053aSSrinivas Pandruvada if (result) { 37700ae053aSSrinivas Pandruvada dev_err(&device->dev, "Failed to set initial power state\n"); 37800ae053aSSrinivas Pandruvada goto err_end; 37900ae053aSSrinivas Pandruvada } 38000ae053aSSrinivas Pandruvada } 38100ae053aSSrinivas Pandruvada 38200ae053aSSrinivas Pandruvada if (!strncmp(pdev->name, "PNP0C0B", strlen("PNP0C0B"))) 38300ae053aSSrinivas Pandruvada name = "Fan"; 38400ae053aSSrinivas Pandruvada else 38500ae053aSSrinivas Pandruvada name = acpi_device_bid(device); 38600ae053aSSrinivas Pandruvada 38700ae053aSSrinivas Pandruvada cdev = thermal_cooling_device_register(name, device, 38800ae053aSSrinivas Pandruvada &fan_cooling_ops); 38900ae053aSSrinivas Pandruvada if (IS_ERR(cdev)) { 39000ae053aSSrinivas Pandruvada result = PTR_ERR(cdev); 39100ae053aSSrinivas Pandruvada goto err_end; 39200ae053aSSrinivas Pandruvada } 39300ae053aSSrinivas Pandruvada 39400ae053aSSrinivas Pandruvada dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id); 39500ae053aSSrinivas Pandruvada 39600ae053aSSrinivas Pandruvada fan->cdev = cdev; 39700ae053aSSrinivas Pandruvada result = sysfs_create_link(&pdev->dev.kobj, 39800ae053aSSrinivas Pandruvada &cdev->device.kobj, 39900ae053aSSrinivas Pandruvada "thermal_cooling"); 40000ae053aSSrinivas Pandruvada if (result) 40100ae053aSSrinivas Pandruvada dev_err(&pdev->dev, "Failed to create sysfs link 'thermal_cooling'\n"); 40200ae053aSSrinivas Pandruvada 40300ae053aSSrinivas Pandruvada result = sysfs_create_link(&cdev->device.kobj, 40400ae053aSSrinivas Pandruvada &pdev->dev.kobj, 40500ae053aSSrinivas Pandruvada "device"); 40600ae053aSSrinivas Pandruvada if (result) { 40700ae053aSSrinivas Pandruvada dev_err(&pdev->dev, "Failed to create sysfs link 'device'\n"); 40800ae053aSSrinivas Pandruvada goto err_end; 40900ae053aSSrinivas Pandruvada } 41000ae053aSSrinivas Pandruvada 41100ae053aSSrinivas Pandruvada return 0; 41200ae053aSSrinivas Pandruvada 41300ae053aSSrinivas Pandruvada err_end: 41400ae053aSSrinivas Pandruvada if (fan->acpi4) 41500ae053aSSrinivas Pandruvada acpi_fan_delete_attributes(device); 41600ae053aSSrinivas Pandruvada 41700ae053aSSrinivas Pandruvada return result; 41800ae053aSSrinivas Pandruvada } 41900ae053aSSrinivas Pandruvada 42000ae053aSSrinivas Pandruvada static int acpi_fan_remove(struct platform_device *pdev) 42100ae053aSSrinivas Pandruvada { 42200ae053aSSrinivas Pandruvada struct acpi_fan *fan = platform_get_drvdata(pdev); 42300ae053aSSrinivas Pandruvada 42400ae053aSSrinivas Pandruvada if (fan->acpi4) { 42500ae053aSSrinivas Pandruvada struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 42600ae053aSSrinivas Pandruvada 42700ae053aSSrinivas Pandruvada acpi_fan_delete_attributes(device); 42800ae053aSSrinivas Pandruvada } 42900ae053aSSrinivas Pandruvada sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling"); 43000ae053aSSrinivas Pandruvada sysfs_remove_link(&fan->cdev->device.kobj, "device"); 43100ae053aSSrinivas Pandruvada thermal_cooling_device_unregister(fan->cdev); 43200ae053aSSrinivas Pandruvada 43300ae053aSSrinivas Pandruvada return 0; 43400ae053aSSrinivas Pandruvada } 43500ae053aSSrinivas Pandruvada 43600ae053aSSrinivas Pandruvada #ifdef CONFIG_PM_SLEEP 43700ae053aSSrinivas Pandruvada static int acpi_fan_suspend(struct device *dev) 43800ae053aSSrinivas Pandruvada { 43900ae053aSSrinivas Pandruvada struct acpi_fan *fan = dev_get_drvdata(dev); 44000ae053aSSrinivas Pandruvada if (fan->acpi4) 44100ae053aSSrinivas Pandruvada return 0; 44200ae053aSSrinivas Pandruvada 44300ae053aSSrinivas Pandruvada acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0); 44400ae053aSSrinivas Pandruvada 44500ae053aSSrinivas Pandruvada return AE_OK; 44600ae053aSSrinivas Pandruvada } 44700ae053aSSrinivas Pandruvada 44800ae053aSSrinivas Pandruvada static int acpi_fan_resume(struct device *dev) 44900ae053aSSrinivas Pandruvada { 45000ae053aSSrinivas Pandruvada int result; 45100ae053aSSrinivas Pandruvada struct acpi_fan *fan = dev_get_drvdata(dev); 45200ae053aSSrinivas Pandruvada 45300ae053aSSrinivas Pandruvada if (fan->acpi4) 45400ae053aSSrinivas Pandruvada return 0; 45500ae053aSSrinivas Pandruvada 45600ae053aSSrinivas Pandruvada result = acpi_device_update_power(ACPI_COMPANION(dev), NULL); 45700ae053aSSrinivas Pandruvada if (result) 45800ae053aSSrinivas Pandruvada dev_err(dev, "Error updating fan power state\n"); 45900ae053aSSrinivas Pandruvada 46000ae053aSSrinivas Pandruvada return result; 46100ae053aSSrinivas Pandruvada } 46200ae053aSSrinivas Pandruvada #endif 46300ae053aSSrinivas Pandruvada 46400ae053aSSrinivas Pandruvada module_platform_driver(acpi_fan_driver); 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