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-rw-r--r--arch/arm/mach-tegra/board-ventana-panel.c11
-rw-r--r--arch/arm/mach-tegra/board-whistler-panel.c12
-rw-r--r--arch/arm/mach-tegra/common.c122
-rw-r--r--arch/arm/mach-tegra/include/mach/tegra_cpufreq.h33
4 files changed, 178 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/board-ventana-panel.c b/arch/arm/mach-tegra/board-ventana-panel.c
index 66bea3b0a9c7..0194ebfa036c 100644
--- a/arch/arm/mach-tegra/board-ventana-panel.c
+++ b/arch/arm/mach-tegra/board-ventana-panel.c
@@ -32,6 +32,7 @@
#include <mach/iomap.h>
#include <mach/dc.h>
#include <mach/fb.h>
+#include <mach/tegra_cpufreq.h>
#include "devices.h"
#include "gpio-names.h"
@@ -336,12 +337,22 @@ static void ventana_panel_early_suspend(struct early_suspend *h)
{
if (num_registered_fb > 0)
fb_blank(registered_fb[0], FB_BLANK_POWERDOWN);
+#ifdef CONFIG_CPU_FREQ
+ cpufreq_save_default_governor();
+ cpufreq_set_conservative_governor();
+ cpufreq_set_conservative_governor_param(
+ SET_CONSERVATIVE_GOVERNOR_UP_THRESHOLD,
+ SET_CONSERVATIVE_GOVERNOR_DOWN_THRESHOLD);
+#endif
}
static void ventana_panel_late_resume(struct early_suspend *h)
{
if (num_registered_fb > 0)
fb_blank(registered_fb[0], FB_BLANK_UNBLANK);
+#ifdef CONFIG_CPU_FREQ
+ cpufreq_restore_default_governor();
+#endif
}
#endif
diff --git a/arch/arm/mach-tegra/board-whistler-panel.c b/arch/arm/mach-tegra/board-whistler-panel.c
index 9cc797739149..fdf3960d4684 100644
--- a/arch/arm/mach-tegra/board-whistler-panel.c
+++ b/arch/arm/mach-tegra/board-whistler-panel.c
@@ -25,6 +25,7 @@
#include <asm/mach-types.h>
#include <linux/platform_device.h>
#include <linux/earlysuspend.h>
+#include <linux/kernel.h>
#include <linux/pwm_backlight.h>
#include <linux/tegra_pwm_bl.h>
#include <mach/nvhost.h>
@@ -33,6 +34,7 @@
#include <mach/iomap.h>
#include <mach/dc.h>
#include <mach/fb.h>
+#include <mach/tegra_cpufreq.h>
#include "devices.h"
#include "gpio-names.h"
@@ -299,6 +301,13 @@ static void whistler_panel_early_suspend(struct early_suspend *h)
unsigned i;
for (i = 0; i < num_registered_fb; i++)
fb_blank(registered_fb[i], FB_BLANK_POWERDOWN);
+#ifdef CONFIG_CPU_FREQ
+ cpufreq_save_default_governor();
+ cpufreq_set_conservative_governor();
+ cpufreq_set_conservative_governor_param(
+ SET_CONSERVATIVE_GOVERNOR_UP_THRESHOLD,
+ SET_CONSERVATIVE_GOVERNOR_DOWN_THRESHOLD);
+#endif
}
static void whistler_panel_late_resume(struct early_suspend *h)
@@ -306,6 +315,9 @@ static void whistler_panel_late_resume(struct early_suspend *h)
unsigned i;
for (i = 0; i < num_registered_fb; i++)
fb_blank(registered_fb[i], FB_BLANK_UNBLANK);
+#ifdef CONFIG_CPU_FREQ
+ cpufreq_restore_default_governor();
+#endif
}
#endif
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index e36af7691fc3..51aa082a45dd 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -36,6 +36,7 @@
#include <mach/dma.h>
#include <mach/powergate.h>
#include <mach/system.h>
+#include <mach/tegra_cpufreq.h>
#include "apbio.h"
#include "board.h"
@@ -496,3 +497,124 @@ void __init tegra_reserve(unsigned long carveout_size, unsigned long fb_size,
tegra_carveout_start,
tegra_carveout_start + tegra_carveout_size - 1);
}
+
+#if defined CONFIG_HAS_EARLYSUSPEND && defined CONFIG_CPU_FREQ
+static char cpufreq_gov_default[32];
+static char *cpufreq_gov_conservative = "conservative";
+static char *cpufreq_sysfs_place_holder="/sys/devices/system/cpu/cpu%i/cpufreq/scaling_governor";
+static char *cpufreq_gov_conservative_param="/sys/devices/system/cpu/cpufreq/conservative/%s";
+
+static void cpufreq_set_governor(char *governor)
+{
+ struct file *scaling_gov = NULL;
+ char buf[128];
+ int i;
+ loff_t offset = 0;
+
+ if (governor == NULL)
+ return;
+
+ for_each_cpu(i, cpu_present_mask) {
+ sprintf(buf, cpufreq_sysfs_place_holder, i);
+ scaling_gov = filp_open(buf, O_RDWR, 0);
+ if (scaling_gov != NULL) {
+ if (scaling_gov->f_op != NULL &&
+ scaling_gov->f_op->write != NULL)
+ scaling_gov->f_op->write(scaling_gov,
+ governor,
+ strlen(governor),
+ &offset);
+ else
+ pr_err("f_op might be null\n");
+
+ filp_close(scaling_gov, NULL);
+ } else {
+ pr_err("%s. Can't open %s\n", __func__, buf);
+ }
+ }
+}
+
+void cpufreq_save_default_governor(void)
+{
+ struct file *scaling_gov = NULL;
+ char buf[128];
+ loff_t offset = 0;
+
+ buf[127] = 0;
+ sprintf(buf, cpufreq_sysfs_place_holder,0);
+ scaling_gov = filp_open(buf, O_RDONLY, 0);
+ if (scaling_gov != NULL) {
+ if (scaling_gov->f_op != NULL &&
+ scaling_gov->f_op->read != NULL)
+ scaling_gov->f_op->read(scaling_gov,
+ cpufreq_gov_default,
+ 32,
+ &offset);
+ else
+ pr_err("f_op might be null\n");
+
+ filp_close(scaling_gov, NULL);
+ } else {
+ pr_err("%s. Can't open %s\n", __func__, buf);
+ }
+}
+
+void cpufreq_restore_default_governor(void)
+{
+ cpufreq_set_governor(cpufreq_gov_default);
+}
+
+void cpufreq_set_conservative_governor_param(int up_th, int down_th)
+{
+ struct file *gov_param = NULL;
+ static char buf[128],parm[8];
+ loff_t offset = 0;
+
+ if (up_th <= down_th) {
+ printk(KERN_ERR "%s: up_th(%d) is lesser than down_th(%d)\n",
+ __func__, up_th, down_th);
+ return;
+ }
+
+ sprintf(parm, "%d", up_th);
+ sprintf(buf, cpufreq_gov_conservative_param ,"up_threshold");
+ gov_param = filp_open(buf, O_RDONLY, 0);
+ if (gov_param != NULL) {
+ if (gov_param->f_op != NULL &&
+ gov_param->f_op->write != NULL)
+ gov_param->f_op->write(gov_param,
+ parm,
+ strlen(parm),
+ &offset);
+ else
+ pr_err("f_op might be null\n");
+
+ filp_close(gov_param, NULL);
+ } else {
+ pr_err("%s. Can't open %s\n", __func__, buf);
+ }
+
+ sprintf(parm, "%d", down_th);
+ sprintf(buf, cpufreq_gov_conservative_param ,"down_threshold");
+ gov_param = filp_open(buf, O_RDONLY, 0);
+ if (gov_param != NULL) {
+ if (gov_param->f_op != NULL &&
+ gov_param->f_op->write != NULL)
+ gov_param->f_op->write(gov_param,
+ parm,
+ strlen(parm),
+ &offset);
+ else
+ pr_err("f_op might be null\n");
+
+ filp_close(gov_param, NULL);
+ } else {
+ pr_err("%s. Can't open %s\n", __func__, buf);
+ }
+}
+
+void cpufreq_set_conservative_governor(void)
+{
+ cpufreq_set_governor(cpufreq_gov_conservative);
+}
+#endif
diff --git a/arch/arm/mach-tegra/include/mach/tegra_cpufreq.h b/arch/arm/mach-tegra/include/mach/tegra_cpufreq.h
new file mode 100644
index 000000000000..2812926c6ecd
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/tegra_cpufreq.h
@@ -0,0 +1,33 @@
+/*
+ * arch/arm/mach-tegra/include/mach/fb.h
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ * Erik Gilling <konkers@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __MACH_TEGRA_CPUFREQ_H
+#define __MACH_TEGRA_CPUFREQ_H
+
+#if defined CONFIG_HAS_EARLYSUSPEND && defined CONFIG_CPU_FREQ
+#define SET_CONSERVATIVE_GOVERNOR_UP_THRESHOLD 95
+#define SET_CONSERVATIVE_GOVERNOR_DOWN_THRESHOLD 50
+
+void cpufreq_save_default_governor(void);
+void cpufreq_restore_default_governor(void);
+void cpufreq_set_conservative_governor(void);
+void cpufreq_set_conservative_governor_param(int up_th, int down_th);
+#endif
+
+#endif
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-17 08:14:42 +0000