static void am33xx_pm_end(void)
{
int ret;
suspend_state = PM_SUSPEND_ON;
ret = am33xx_verify_lp_state();
omap_mbox_enable_irq(m3_mbox, IRQ_RX);
am33xx_m3_state_machine_reset();
enable_hlt();
return;
}
static int am33xx_pm_suspend(void)
{
int state, ret = 0;
struct omap_hwmod *gpmc_oh, *usb_oh, *gpio1_oh;
usb_oh = omap_hwmod_lookup("usb_otg_hs");
gpmc_oh = omap_hwmod_lookup("gpmc");
gpio1_oh = omap_hwmod_lookup("gpio1"); /* WKUP domain GPIO */
omap_hwmod_enable(usb_oh);
omap_hwmod_enable(gpmc_oh);
/*
* Keep USB module enabled during standby
* to enable USB remote wakeup
* Note: This will result in hard-coding USB state
* during standby
*/
if (suspend_state != PM_SUSPEND_STANDBY)
omap_hwmod_idle(usb_oh);
omap_hwmod_idle(gpmc_oh);
/*
* Disable the GPIO module. This ensure that
* only sWAKEUP interrupts to Cortex-M3 get generated
*
* XXX: EVM_SK uses a GPIO0 pin for VTP control
* in suspend and hence we can't do this for EVM_SK
* alone. The side-effect of this is that GPIO wakeup
* might have issues. Refer to commit 672639b for the
* details
*/
/*
* Keep GPIO0 module enabled during standby to
* support wakeup via GPIO0 keys.
*/
if ((suspend_cfg_param_list[EVM_ID] != EVM_SK) &&
(suspend_state != PM_SUSPEND_STANDBY))
omap_hwmod_idle(gpio1_oh);
/*
* Update Suspend_State value to be used in sleep33xx.S to keep
* GPIO0 module enabled during standby for EVM-SK
*/
if (suspend_state == PM_SUSPEND_STANDBY)
suspend_cfg_param_list[SUSPEND_STATE] = PM_STANDBY;
else
suspend_cfg_param_list[SUSPEND_STATE] = PM_DS0;
/*
* Keep Touchscreen module enabled during standby
* to enable wakeup from standby.
*/
if (suspend_state == PM_SUSPEND_STANDBY)
writel(0x2, AM33XX_CM_WKUP_ADC_TSC_CLKCTRL);
if (gfx_l3_clkdm && gfx_l4ls_clkdm) {
clkdm_sleep(gfx_l3_clkdm);
clkdm_sleep(gfx_l4ls_clkdm);
}
/* Try to put GFX to sleep */
if (gfx_pwrdm)
pwrdm_set_next_pwrst(gfx_pwrdm, PWRDM_POWER_OFF);
else
pr_err("Could not program GFX to low power state\n");
omap3_intc_suspend();
writel(0x0, AM33XX_CM_MPU_MPU_CLKCTRL);
ret = cpu_suspend(0, am33xx_do_sram_idle);
writel(0x2, AM33XX_CM_MPU_MPU_CLKCTRL);
if (gfx_pwrdm) {
state = pwrdm_read_pwrst(gfx_pwrdm);
if (state != PWRDM_POWER_OFF)
pr_err("GFX domain did not transition to low power state\n");
else
pr_info("GFX domain entered low power state\n");
}
/* XXX: Why do we need to wakeup the clockdomains? */
if(gfx_l3_clkdm && gfx_l4ls_clkdm) {
clkdm_wakeup(gfx_l3_clkdm);
clkdm_wakeup(gfx_l4ls_clkdm);
}
/*
* Touchscreen module was enabled during standby
* Disable it here.
*/
if (suspend_state == PM_SUSPEND_STANDBY)
writel(0x0, AM33XX_CM_WKUP_ADC_TSC_CLKCTRL);
/*
* Put USB module to idle on resume from standby
*/
if (suspend_state == PM_SUSPEND_STANDBY)
omap_hwmod_idle(usb_oh);
ret = am33xx_verify_lp_state(ret);
/*
* Enable the GPIO module. Once the driver is
* fully adapted to runtime PM this will go away
*/
/*
* During standby, GPIO was not disabled. Hence no
* need to enable it here.
*/
if ((suspend_cfg_param_list[EVM_ID] != EVM_SK) &&
(suspend_state != PM_SUSPEND_STANDBY))
omap_hwmod_enable(gpio1_oh);
return ret;
}
