static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
unsigned short value;
if (sscanf(buf, "%hu", &value) != 1 ||
(value != 0 && value != 1)) {
printk(KERN_ERR "idle_store: Invalid value\n");
return -EINVAL;
}
if (attr == &sleep_while_idle_attr) {
enable_dyn_sleep = value;
} else if (attr == &clocks_off_while_idle_attr) {
clocks_off_while_idle = value;
} else if (attr == &enable_off_mode_attr) {
enable_off_mode = value;
omap3_pm_off_mode_enable(enable_off_mode);
} else if (attr == &voltage_off_while_idle_attr) {
voltage_off_while_idle = value;
if (voltage_off_while_idle)
prm_set_mod_reg_bits(OMAP3430_SEL_OFF, OMAP3430_GR_MOD,
OMAP3_PRM_VOLTCTRL_OFFSET);
else
prm_clear_mod_reg_bits(OMAP3430_SEL_OFF,
OMAP3430_GR_MOD,
OMAP3_PRM_VOLTCTRL_OFFSET);
} else {
return -EINVAL;
}
return n;
}
static int _prcm_int_handle_wakeup(void)
{
int c;
/* By OMAP3630ES1.x and OMAP3430ES3.1 TRM, S/W must clear
* the EN_IO and EN_IO_CHAIN bits of WKEN_WKUP. Those bits
* would be set again by S/W in sleep sequences.
*/
if (omap_rev() >= OMAP3430_REV_ES3_1)
prm_clear_mod_reg_bits(OMAP3430_EN_IO_MASK |
OMAP3430_EN_IO_CHAIN_MASK,
WKUP_MOD, PM_WKEN);
c = prcm_clear_mod_irqs(WKUP_MOD, 1);
c += prcm_clear_mod_irqs(CORE_MOD, 1);
c += prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1);
if (omap_rev() > OMAP3430_REV_ES1_0) {
c += prcm_clear_mod_irqs(CORE_MOD, 3);
c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1);
}
return c;
}
static void omap2_enter_full_retention(void)
{
u32 l;
struct timespec ts_preidle, ts_postidle, ts_idle;
/* There is 1 reference hold for all children of the oscillator
* clock, the following will remove it. If no one else uses the
* oscillator itself it will be disabled if/when we enter retention
* mode.
*/
clk_disable(osc_ck);
/* Clear old wake-up events */
/* REVISIT: These write to reserved bits? */
prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST);
/*
* Set MPU powerdomain's next power state to RETENTION;
* preserve logic state during retention
*/
pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET);
pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET);
/* Workaround to kill USB */
l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL;
omap_ctrl_writel(l, OMAP2_CONTROL_DEVCONF0);
omap2_gpio_prepare_for_idle(PWRDM_POWER_RET);
if (omap2_pm_debug) {
omap2_pm_dump(0, 0, 0);
getnstimeofday(&ts_preidle);
}
/* One last check for pending IRQs to avoid extra latency due
* to sleeping unnecessarily. */
if (omap_irq_pending())
goto no_sleep;
omap_uart_prepare_idle(0);
omap_uart_prepare_idle(1);
omap_uart_prepare_idle(2);
/* Jump to SRAM suspend code */
omap2_sram_suspend(sdrc_read_reg(SDRC_DLLA_CTRL),
OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL),
OMAP_SDRC_REGADDR(SDRC_POWER));
no_sleep:
omap_uart_resume_idle(2);
omap_uart_resume_idle(1);
omap_uart_resume_idle(0);
if (omap2_pm_debug) {
unsigned long long tmp;
getnstimeofday(&ts_postidle);
ts_idle = timespec_sub(ts_postidle, ts_preidle);
tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
omap2_pm_dump(0, 1, tmp);
}
omap2_gpio_resume_after_idle();
clk_enable(osc_ck);
/* clear CORE wake-up events */
prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
/* wakeup domain events - bit 1: GPT1, bit5 GPIO */
prm_clear_mod_reg_bits(0x4 | 0x1, WKUP_MOD, PM_WKST);
/* MPU domain wake events */
l = prm_read_mod_reg(OCP_MOD, OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
if (l & 0x01)
prm_write_mod_reg(0x01, OCP_MOD,
OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
if (l & 0x20)
prm_write_mod_reg(0x20, OCP_MOD,
OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
/* Mask future PRCM-to-MPU interrupts */
prm_write_mod_reg(0x0, OCP_MOD, OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
}
static void omap3_disable_io_chain(void)
{
if (omap_rev() >= OMAP3430_REV_ES3_1)
prm_clear_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD,
PM_WKEN);
}