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 33static int 34gf100_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 45int 46gf100_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 55static const struct nvkm_volt_func 56gf100_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 63int 64gf100_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