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Commit c40552bc authored by Kevin Hilman's avatar Kevin Hilman
Browse files

OMAP3: PM debug: allow runtime toggle of PM features 



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: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 89139dce

arch/arm/mach-omap2/pm-debug.c

+27 −0
Original line number Diff line number Diff line
@@ -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;

arch/arm/mach-omap2/pm.h

+4 −0
Original line number Diff line number Diff line
@@ -13,7 +13,11 @@ 


#include <plat/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);

arch/arm/mach-omap2/pm34xx.c

+22 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/list.h>

#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/clk.h>



#include <plat/sram.h>

#include <plat/clockdomain.h>
@@ -57,6 +58,9 @@ 
#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;
@@ -456,6 +460,8 @@ 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;

arch/arm/mach-omap2/serial.c

+0 −2
Original line number Diff line number Diff line
@@ -155,8 +155,6 @@ 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;