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, enum nvkm_subdev_type type, int inst,
53 		struct nvkm_therm **ptherm)
54 {
55 	return nvkm_therm_new_(&gp100_therm, device, type, inst, ptherm);
56 }
57