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ARM: tegra: add speedo-based process id for Tegra114 

Add speedo-based process identification for Tegra114.

Based on the work by: Alex Frid <afrid@nvidia.com>

Signed-off-by: Danny Huang <dahuang@nvidia.com>
[swarren: added include of bug.h]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Danny Huang 2013-03-18 19:17:34 +08:00 committed by Stephen Warren
parent d591fdf8e2
commit 7495b2eb07
4 changed files with 116 additions and 0 deletions
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1
arch/arm/mach-tegra/Makefile
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@ -28,6 +28,7 @@ obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_CPU_FREQ) += cpu-tegra.o
obj-$(CONFIG_TEGRA_PCI) += pcie.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += cpuidle-tegra114.o
endif

4
arch/arm/mach-tegra/fuse.c
View File

@ -2,6 +2,7 @@
* arch/arm/mach-tegra/fuse.c
*
* Copyright (C) 2010 Google, Inc.
* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
*
* Author:
* Colin Cross <ccross@android.com>
@ -137,6 +138,9 @@ void tegra_init_fuse(void)
tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
tegra_init_speedo_data = &tegra30_init_speedo_data;
break;
case TEGRA114:
tegra_init_speedo_data = &tegra114_init_speedo_data;
break;
default:
pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;

7
arch/arm/mach-tegra/fuse.h
View File

@ -1,5 +1,6 @@
/*
* Copyright (C) 2010 Google, Inc.
* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
*
* Author:
* Colin Cross <ccross@android.com>
@ -66,4 +67,10 @@ void tegra30_init_speedo_data(void);
static inline void tegra30_init_speedo_data(void) {}
#endif
#ifdef CONFIG_ARCH_TEGRA_114_SOC
void tegra114_init_speedo_data(void);
#else
static inline void tegra114_init_speedo_data(void) {}
#endif
#endif

104
arch/arm/mach-tegra/tegra114_speedo.c Normal file
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@ -0,0 +1,104 @@
/*
* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/bug.h>
#include "fuse.h"
#define CORE_PROCESS_CORNERS_NUM 2
#define CPU_PROCESS_CORNERS_NUM 2
enum {
THRESHOLD_INDEX_0,
THRESHOLD_INDEX_1,
THRESHOLD_INDEX_COUNT,
};
static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
{1123, UINT_MAX},
{0, UINT_MAX},
};
static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
{1695, UINT_MAX},
{0, UINT_MAX},
};
static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)
{
u32 tmp;
switch (sku) {
case 0x00:
case 0x10:
case 0x05:
case 0x06:
tegra_cpu_speedo_id = 1;
tegra_soc_speedo_id = 0;
*threshold = THRESHOLD_INDEX_0;
break;
case 0x03:
case 0x04:
tegra_cpu_speedo_id = 2;
tegra_soc_speedo_id = 1;
*threshold = THRESHOLD_INDEX_1;
break;
default:
pr_err("Tegra114 Unknown SKU %d\n", sku);
tegra_cpu_speedo_id = 0;
tegra_soc_speedo_id = 0;
*threshold = THRESHOLD_INDEX_0;
break;
}
if (rev == TEGRA_REVISION_A01) {
tmp = tegra_fuse_readl(0x270) << 1;
tmp |= tegra_fuse_readl(0x26c);
if (!tmp)
tegra_cpu_speedo_id = 0;
}
}
void tegra114_init_speedo_data(void)
{
u32 cpu_speedo_val;
u32 core_speedo_val;
int threshold;
int i;
BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
THRESHOLD_INDEX_COUNT);
BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
THRESHOLD_INDEX_COUNT);
rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);
cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;
core_speedo_val = tegra_fuse_readl(0x134);
for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)
if (cpu_speedo_val < cpu_process_speedos[threshold][i])
break;
tegra_cpu_process_id = i;
for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)
if (core_speedo_val < core_process_speedos[threshold][i])
break;
tegra_core_process_id = i;
}