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arch/arm/src/imxrt: Add power management hooks

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This commit is contained in:
Gregory Nutt 2018-04-17 09:17:44 -06:00
parent c13e54de10
commit 021b4954d7
2 changed files with 252 additions and 0 deletions
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150
arch/arm/src/imxrt/imxrt_serial.c
View File

@ -51,7 +51,9 @@
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <nuttx/init.h>
#include <nuttx/power/pm.h>
#include <nuttx/serial/serial.h>
#include <arch/serial.h>
#include <arch/board/board.h>
@ -296,6 +298,16 @@
/* UART, if available, should have been assigned to ttyS0-7. */
/* Power management definitions */
#if defined(CONFIG_PM) && !defined(CONFIG_PM_SERIAL_ACTIVITY)
# define CONFIG_PM_SERIAL_ACTIVITY 10
#endif
#if defined(CONFIG_PM)
# define PM_IDLE_DOMAIN 0 /* Revisit */
#endif
/****************************************************************************
* Private Types
****************************************************************************/
@ -340,6 +352,13 @@ static void imxrt_txint(struct uart_dev_s *dev, bool enable);
static bool imxrt_txready(struct uart_dev_s *dev);
static bool imxrt_txempty(struct uart_dev_s *dev);
#ifdef CONFIG_PM
static void up_pm_notify(struct pm_callback_s *cb, int dowmin,
enum pm_state_e pmstate);
static int up_pm_prepare(struct pm_callback_s *cb, int domain,
enum pm_state_e pmstate);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
@ -635,6 +654,14 @@ static struct uart_dev_s g_uart8port =
};
#endif
#ifdef CONFIG_PM
static struct pm_callback_s g_serial_pmcb =
{
.notify = up_pm_notify,
.prepare = up_pm_prepare,
};
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
@ -827,6 +854,12 @@ static int imxrt_interrupt(int irq, void *context, FAR void *arg)
DEBUGASSERT(dev != NULL && dev->priv != NULL);
priv = (struct imxrt_uart_s *)dev->priv;
/* Report serial activity to the power management logic */
#if defined(CONFIG_PM) && CONFIG_PM_SERIAL_ACTIVITY > 0
pm_activity(PM_IDLE_DOMAIN, CONFIG_PM_SERIAL_ACTIVITY);
#endif
/* Loop until there are no characters to be transferred or,
* until we have been looping for a long time.
*/
@ -1052,6 +1085,113 @@ static bool imxrt_txempty(struct uart_dev_s *dev)
return ((imxrt_serialin(priv, IMXRT_LPUART_STAT_OFFSET) & LPUART_STAT_TDRE) != 0);
}
/****************************************************************************
* Name: up_pm_notify
*
* Description:
* Notify the driver of new power state. This callback is called after
* all drivers have had the opportunity to prepare for the new power state.
*
* Input Parameters:
*
* cb - Returned to the driver. The driver version of the callback
* structure may include additional, driver-specific state data at
* the end of the structure.
*
* pmstate - Identifies the new PM state
*
* Returned Value:
* None - The driver already agreed to transition to the low power
* consumption state when when it returned OK to the prepare() call.
*
*
****************************************************************************/
#ifdef CONFIG_PM
static void up_pm_notify(struct pm_callback_s *cb, int domain,
enum pm_state_e pmstate)
{
switch (pmstate)
{
case(PM_NORMAL):
{
/* Logic for PM_NORMAL goes here */
}
break;
case(PM_IDLE):
{
/* Logic for PM_IDLE goes here */
}
break;
case(PM_STANDBY):
{
/* Logic for PM_STANDBY goes here */
}
break;
case(PM_SLEEP):
{
/* Logic for PM_SLEEP goes here */
}
break;
default:
/* Should not get here */
break;
}
}
#endif
/****************************************************************************
* Name: up_pm_prepare
*
* Description:
* Request the driver to prepare for a new power state. This is a warning
* that the system is about to enter into a new power state. The driver
* should begin whatever operations that may be required to enter power
* state. The driver may abort the state change mode by returning a
* non-zero value from the callback function.
*
* Input Parameters:
*
* cb - Returned to the driver. The driver version of the callback
* structure may include additional, driver-specific state data at
* the end of the structure.
*
* pmstate - Identifies the new PM state
*
* Returned Value:
* Zero - (OK) means the event was successfully processed and that the
* driver is prepared for the PM state change.
*
* Non-zero - means that the driver is not prepared to perform the tasks
* needed achieve this power setting and will cause the state
* change to be aborted. NOTE: The prepare() method will also
* be called when reverting from lower back to higher power
* consumption modes (say because another driver refused a
* lower power state change). Drivers are not permitted to
* return non-zero values when reverting back to higher power
* consumption modes!
*
*
****************************************************************************/
#ifdef CONFIG_PM
static int up_pm_prepare(struct pm_callback_s *cb, int domain,
enum pm_state_e pmstate)
{
/* Logic to prepare for a reduced power state goes here. */
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
@ -1094,6 +1234,16 @@ void up_earlyserialinit(void)
void up_serialinit(void)
{
#ifdef CONFIG_PM
int ret;
/* Register to receive power management callbacks */
ret = pm_register(&g_serial_pmcb);
DEBUGASSERT(ret == OK);
UNUSED(ret);
#endif
#ifdef CONSOLE_DEV
(void)uart_register("/dev/console", &CONSOLE_DEV);
#endif

102
arch/arm/src/imxrt/imxrt_timerisr.c
View File

@ -42,7 +42,10 @@
#include <stdint.h>
#include <time.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/power/pm.h>
#include <arch/board/board.h>
#include "nvic.h"
@ -80,6 +83,31 @@
# error SYSTICK_RELOAD exceeds the range of the RELOAD register
#endif
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int imxrt_timerisr(int irq, uint32_t *regs, void *arg)'
#ifdef CONFIG_PM
static void up_pm_notify(struct pm_callback_s *cb, int dowmin,
enum pm_state_e pmstate);
static int up_pm_prepare(struct pm_callback_s *cb, int domain,
enum pm_state_e pmstate);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#ifdef CONFIG_PM
static struct pm_callback_s g_timer_pmcb =
{
.notify = up_pm_notify,
.prepare = up_pm_prepare,
};
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
@ -101,6 +129,69 @@ static int imxrt_timerisr(int irq, uint32_t *regs, void *arg)
return 0;
}
/****************************************************************************
* Name: up_pm_notify
*
* Description:
* Notify the driver of new power state. This callback is called after
* all drivers have had the opportunity to prepare for the new power state.
*
* Input Parameters:
*
* cb - Returned to the driver. The driver version of the callback
* structure may include additional, driver-specific state data at
* the end of the structure.
*
* pmstate - Identifies the new PM state
*
* Returned Value:
* None - The driver already agreed to transition to the low power
* consumption state when when it returned OK to the prepare() call.
*
*
****************************************************************************/
#ifdef CONFIG_PM
static void up_pm_notify(struct pm_callback_s *cb, int domain,
enum pm_state_e pmstate)
{
switch (pmstate)
{
case(PM_NORMAL):
{
/* Logic for PM_NORMAL goes here */
}
break;
case(PM_IDLE):
{
/* Logic for PM_IDLE goes here */
}
break;
case(PM_STANDBY):
{
/* Logic for PM_STANDBY goes here */
}
break;
case(PM_SLEEP):
{
/* Logic for PM_SLEEP goes here */
}
break;
default:
/* Should not get here */
break;
}
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
@ -117,6 +208,9 @@ static int imxrt_timerisr(int irq, uint32_t *regs, void *arg)
void arm_timer_initialize(void)
{
uint32_t regval;
#ifdef CONFIG_PM
int ret;
#endif
/* Configure SysTick to interrupt at the requested rate */
@ -133,6 +227,14 @@ void arm_timer_initialize(void)
NVIC_SYSTICK_CTRL_ENABLE);
putreg32(regval, NVIC_SYSTICK_CTRL);
#ifdef CONFIG_PM
/* Register to receive power management callbacks */
ret = pm_register(&g_timer_pmcb);
DEBUGASSERT(ret == OK);
UNUSED(ret);
#endif
/* And enable the timer interrupt */
up_enable_irq(IMXRT_IRQ_SYSTICK);