drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf117.c

   1 /*
   2  * Copyright 2019 Ilia Mirkin
   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: Ilia Mirkin
  23  */
  24 #include "priv.h"
  25
  26 #include <subdev/fuse.h>
  27
  28 static int
  29 gf117_volt_speedo_read(struct nvkm_volt *volt)
  30 {
  31         struct nvkm_device *device = volt->subdev.device;
  32         struct nvkm_fuse *fuse = device->fuse;
  33
  34         if (!fuse)
  35                 return -EINVAL;
  36
  37         return nvkm_fuse_read(fuse, 0x3a8);
  38 }
  39
  40 static const struct nvkm_volt_func
  41 gf117_volt = {
  42         .oneinit = gf100_volt_oneinit,
  43         .vid_get = nvkm_voltgpio_get,
  44         .vid_set = nvkm_voltgpio_set,
  45         .speedo_read = gf117_volt_speedo_read,
  46 };
  47
  48 int
  49 gf117_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
  50 {
  51         struct nvkm_volt *volt;
  52         int ret;
  53
  54         ret = nvkm_volt_new_(&gf117_volt, device, index, &volt);
  55         *pvolt = volt;
  56         if (ret)
  57                 return ret;
  58
  59         return nvkm_voltgpio_init(volt);
  60 }