subdev/therm/gp100.c

0001 /*
0002  * Copyright 2017 Rhys Kidd
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Rhys Kidd
0023  */
0024 #include "priv.h"
0025
0026 static int
0027 gp100_temp_get(struct nvkm_therm *therm)
0028 {
0029     struct nvkm_device *device = therm->subdev.device;
0030     struct nvkm_subdev *subdev = &therm->subdev;
0031     u32 tsensor = nvkm_rd32(device, 0x020460);
0032     u32 inttemp = (tsensor & 0x0001fff8);
0033
0034     /* device SHADOWed */
0035     if (tsensor & 0x40000000)
0036         nvkm_trace(subdev, "reading temperature from SHADOWed sensor\n");
0037
0038     /* device valid */
0039     if (tsensor & 0x20000000)
0040         return (inttemp >> 8);
0041     else
0042         return -ENODEV;
0043 }
0044
0045 static const struct nvkm_therm_func
0046 gp100_therm = {
0047     .temp_get = gp100_temp_get,
0048     .program_alarms = nvkm_therm_program_alarms_polling,
0049 };
0050
0051 int
0052 gp100_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
0053         struct nvkm_therm **ptherm)
0054 {
0055     return nvkm_therm_new_(&gp100_therm, device, type, inst, ptherm);
0056 }