2 * Copyright (c) 2013-2014, NVIDIA CORPORATION. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <linux/bug.h>
18 #include <linux/device.h>
19 #include <linux/kernel.h>
21 #include <soc/tegra/fuse.h>
25 #define SOC_PROCESS_CORNERS 2
26 #define CPU_PROCESS_CORNERS 2
31 THRESHOLD_INDEX_COUNT,
34 static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = {
39 static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
44 static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
48 u32 sku = sku_info->sku_id;
49 enum tegra_revision rev = sku_info->revision;
56 sku_info->cpu_speedo_id = 1;
57 sku_info->soc_speedo_id = 0;
58 *threshold = THRESHOLD_INDEX_0;
63 sku_info->cpu_speedo_id = 2;
64 sku_info->soc_speedo_id = 1;
65 *threshold = THRESHOLD_INDEX_1;
69 pr_err("Tegra Unknown SKU %d\n", sku);
70 sku_info->cpu_speedo_id = 0;
71 sku_info->soc_speedo_id = 0;
72 *threshold = THRESHOLD_INDEX_0;
76 if (rev == TEGRA_REVISION_A01) {
77 tmp = tegra_fuse_read_early(0x270) << 1;
78 tmp |= tegra_fuse_read_early(0x26c);
80 sku_info->cpu_speedo_id = 0;
84 void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
91 BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
92 THRESHOLD_INDEX_COUNT);
93 BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) !=
94 THRESHOLD_INDEX_COUNT);
96 rev_sku_to_speedo_ids(sku_info, &threshold);
98 cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024;
99 soc_speedo_val = tegra_fuse_read_early(0x134);
101 for (i = 0; i < CPU_PROCESS_CORNERS; i++)
102 if (cpu_speedo_val < cpu_process_speedos[threshold][i])
104 sku_info->cpu_process_id = i;
106 for (i = 0; i < SOC_PROCESS_CORNERS; i++)
107 if (soc_speedo_val < soc_process_speedos[threshold][i])
109 sku_info->soc_process_id = i;