1 /*
2 * Copyright 2017 Rhys Kidd
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Rhys Kidd
23 */
24 #include "priv.h"
25
26 static int
27 gp100_temp_get(struct nvkm_therm *therm)
28 {
29 struct nvkm_device *device = therm->subdev.device;
30 struct nvkm_subdev *subdev = &therm->subdev;
31 u32 tsensor = nvkm_rd32(device, 0x020460);
32 u32 inttemp = (tsensor & 0x0001fff8);
33
34 /* device SHADOWed */
35 if (tsensor & 0x40000000)
36 nvkm_trace(subdev, "reading temperature from SHADOWed sensor\n");
37
38 /* device valid */
39 if (tsensor & 0x20000000)
40 return (inttemp >> 8);
41 else
42 return -ENODEV;
43 }
44
45 static const struct nvkm_therm_func
46 gp100_therm = {
47 .temp_get = gp100_temp_get,
48 .program_alarms = nvkm_therm_program_alarms_polling,
49 };
50
51 int
52 gp100_therm_new(struct nvkm_device *device, int index,
53 struct nvkm_therm **ptherm)
54 {
55 return nvkm_therm_new_(&gp100_therm, device, index, ptherm);
56 }