1 /* 2 * Copyright 2016 Karol Herbst 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: Karol Herbst 23 */ 24 #include "priv.h" 25 26 #include <subdev/fuse.h> 27 28 static int 29 gf100_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, 0x1cc); 38 } 39 40 int 41 gf100_volt_oneinit(struct nvkm_volt *volt) 42 { 43 struct nvkm_subdev *subdev = &volt->subdev; 44 if (volt->speedo <= 0) 45 nvkm_error(subdev, "couldn't find speedo value, volting not " 46 "possible\n"); 47 return 0; 48 } 49 50 static const struct nvkm_volt_func 51 gf100_volt = { 52 .oneinit = gf100_volt_oneinit, 53 .vid_get = nvkm_voltgpio_get, 54 .vid_set = nvkm_voltgpio_set, 55 .speedo_read = gf100_volt_speedo_read, 56 }; 57 58 int 59 gf100_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt) 60 { 61 struct nvkm_volt *volt; 62 int ret; 63 64 ret = nvkm_volt_new_(&gf100_volt, device, index, &volt); 65 *pvolt = volt; 66 if (ret) 67 return ret; 68 69 return nvkm_voltgpio_init(volt); 70 } 71