Allow enable/disable of low-power states during idle. To
enable low-power idle:
echo 1 > /debug/pm_debug/sleep_while_idle
to disable:
echo 0 > /debug/pm_debug/sleep_while_idle
Also allow enable/disable of OFF-mode. To enable:
echo 1 > /debug/pm_debug/enable_off_mode
to disable:
echo 0 > /debug/pm_debug/enable_off_mode
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/pm-debug.c | 27 +++++++++++++++++++++++++++
arch/arm/mach-omap2/pm.h | 4 ++++
arch/arm/mach-omap2/pm34xx.c | 22 ++++++++++++++++++++++
arch/arm/mach-omap2/serial.c | 2 --
4 files changed, 53 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index deed1dd..4e05d29 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -527,6 +527,29 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
return 0;
}
+static int option_get(void *data, u64 *val)
+{
+ u32 *option = data;
+
+ *val = *option;
+
+ return 0;
+}
+
+static int option_set(void *data, u64 val)
+{
+ u32 *option = data;
+
+ *option = val;
+
+ if (option == &enable_off_mode)
+ omap3_pm_off_mode_enable(val);
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
+
static int __init pm_dbg_init(void)
{
int i;
@@ -569,6 +592,10 @@ static int __init pm_dbg_init(void)
}
+ (void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUGO, d,
+ &enable_off_mode, &pm_dbg_option_fops);
+ (void) debugfs_create_file("sleep_while_idle", S_IRUGO | S_IWUGO, d,
+ &sleep_while_idle, &pm_dbg_option_fops);
pm_dbg_init_done = 1;
return 0;
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index f1d0214..e47508c 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -13,7 +13,11 @@
#include <mach/powerdomain.h>
+extern u32 enable_off_mode;
+extern u32 sleep_while_idle;
+
extern void *omap3_secure_ram_storage;
+extern void omap3_pm_off_mode_enable(int);
extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm);
extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state);
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 80934c3..99996fc 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -25,6 +25,7 @@
#include <linux/list.h>
#include <linux/err.h>
#include <linux/gpio.h>
+#include <linux/clk.h>
#include <mach/sram.h>
#include <mach/prcm.h>
@@ -58,6 +59,9 @@
#define OMAP343X_TABLE_VALUE_OFFSET 0x30
#define OMAP343X_CONTROL_REG_VALUE_OFFSET 0x32
+u32 enable_off_mode;
+u32 sleep_while_idle;
+
struct power_state {
struct powerdomain *pwrdm;
u32 next_state;
@@ -457,6 +461,8 @@ static int omap3_fclks_active(void)
static int omap3_can_sleep(void)
{
+ if (!sleep_while_idle)
+ return 0;
if (!omap_uart_can_sleep())
return 0;
if (omap3_fclks_active())
@@ -900,6 +906,22 @@ static void __init prcm_setup_regs(void)
omap3_d2d_idle();
}
+void omap3_pm_off_mode_enable(int enable)
+{
+ struct power_state *pwrst;
+ u32 state;
+
+ if (enable)
+ state = PWRDM_POWER_OFF;
+ else
+ state = PWRDM_POWER_RET;
+
+ list_for_each_entry(pwrst, &pwrst_list, node) {
+ pwrst->next_state = state;
+ set_pwrdm_state(pwrst->pwrdm, state);
+ }
+}
+
int omap3_pm_get_suspend_state(struct powerdomain *pwrdm)
{
struct power_state *pwrst;
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index b1ebef4..5fe7684 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -169,8 +169,6 @@ static inline void __init omap_uart_reset(struct omap_uart_state *uart)
#if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3)
-static int enable_off_mode; /* to be removed by full off-mode patches */
-
static void omap_uart_save_context(struct omap_uart_state *uart)
{
u16 lcr = 0;
--
1.6.4.3
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
