1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
7 #include <linux/device.h>
8 #include <linux/kernel.h>
10 #include <soc/tegra/fuse.h>
14 #define SOC_PROCESS_CORNERS 2
15 #define CPU_PROCESS_CORNERS 2
20 THRESHOLD_INDEX_COUNT,
23 static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
28 static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
33 static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
37 u32 sku = sku_info->sku_id;
38 enum tegra_revision rev = sku_info->revision;
45 sku_info->cpu_speedo_id = 1;
46 sku_info->soc_speedo_id = 0;
47 *threshold = THRESHOLD_INDEX_0;
52 sku_info->cpu_speedo_id = 2;
53 sku_info->soc_speedo_id = 1;
54 *threshold = THRESHOLD_INDEX_1;
58 pr_err("Tegra Unknown SKU %d\n", sku);
59 sku_info->cpu_speedo_id = 0;
60 sku_info->soc_speedo_id = 0;
61 *threshold = THRESHOLD_INDEX_0;
65 if (rev == TEGRA_REVISION_A01) {
66 tmp = tegra_fuse_read_early(0x270) << 1;
67 tmp |= tegra_fuse_read_early(0x26c);
69 sku_info->cpu_speedo_id = 0;
73 void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
80 BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
81 THRESHOLD_INDEX_COUNT);
82 BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
83 THRESHOLD_INDEX_COUNT);
85 rev_sku_to_speedo_ids(sku_info, &threshold);
87 cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024;
88 soc_speedo_val = tegra_fuse_read_early(0x134);
90 for (i = 0; i < CPU_PROCESS_CORNERS; i++)
91 if (cpu_speedo_val < cpu_process_speedos[threshold][i])
93 sku_info->cpu_process_id = i;
95 for (i = 0; i < SOC_PROCESS_CORNERS; i++)
96 if (soc_speedo_val < soc_process_speedos[threshold][i])
98 sku_info->soc_process_id = i;