1 /* $NetBSD: nouveau_nvkm_subdev_volt_gf100.c,v 1.2 2021/12/18 23:45:42 riastradh Exp $ */
2
3 /*
4 * Copyright 2016 Karol Herbst
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Karol Herbst
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_volt_gf100.c,v 1.2 2021/12/18 23:45:42 riastradh Exp $");
28
29 #include "priv.h"
30
31 #include <subdev/fuse.h>
32
33 static int
gf100_volt_speedo_read(struct nvkm_volt * volt)34 gf100_volt_speedo_read(struct nvkm_volt *volt)
35 {
36 struct nvkm_device *device = volt->subdev.device;
37 struct nvkm_fuse *fuse = device->fuse;
38
39 if (!fuse)
40 return -EINVAL;
41
42 return nvkm_fuse_read(fuse, 0x1cc);
43 }
44
45 int
gf100_volt_oneinit(struct nvkm_volt * volt)46 gf100_volt_oneinit(struct nvkm_volt *volt)
47 {
48 struct nvkm_subdev *subdev = &volt->subdev;
49 if (volt->speedo <= 0)
50 nvkm_error(subdev, "couldn't find speedo value, volting not "
51 "possible\n");
52 return 0;
53 }
54
55 static const struct nvkm_volt_func
56 gf100_volt = {
57 .oneinit = gf100_volt_oneinit,
58 .vid_get = nvkm_voltgpio_get,
59 .vid_set = nvkm_voltgpio_set,
60 .speedo_read = gf100_volt_speedo_read,
61 };
62
63 int
gf100_volt_new(struct nvkm_device * device,int index,struct nvkm_volt ** pvolt)64 gf100_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
65 {
66 struct nvkm_volt *volt;
67 int ret;
68
69 ret = nvkm_volt_new_(&gf100_volt, device, index, &volt);
70 *pvolt = volt;
71 if (ret)
72 return ret;
73
74 return nvkm_voltgpio_init(volt);
75 }
76