sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

STM32 power management update

Browse Source 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4848 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-06-18 14:45:34 +00:00
parent 9dc0086d0f
commit 006769dd2d
1 changed files with 182 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

165
configs/stm3210e-eval/src/up_lcd.c
View File

@ -68,6 +68,7 @@
#include <nuttx/lcd/lcd.h>
#include <arch/board/board.h>
#include <nuttx/power/pm.h>
#include "up_arch.h"
#include "stm32.h"
@ -403,6 +404,13 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power);
static int stm3210e_getcontrast(struct lcd_dev_s *dev);
static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
/* LCD Power Management */
#ifdef CONFIG_PM
static void stm3210e_pm_notify(struct pm_callback_s *cb, enum pm_state_e pmstate);
static int stm3210e_pm_prepare(struct pm_callback_s *cb, enum pm_state_e pmstate);
#endif
/* Initialization */
static inline void stm3210e_lcdinitialize(void);
@ -472,6 +480,15 @@ static struct stm3210e_dev_s g_lcddev =
},
};
#ifdef CONFIG_PM
static struct pm_callback_s g_lcdcb =
{
.notify = stm3210e_pm_notify,
.prepare = stm3210e_pm_prepare,
};
#endif
/**************************************************************************************
* Private Functions
**************************************************************************************/
@ -1022,8 +1039,7 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power)
if (power > 0)
{
#ifdef CONFIG_LCD_BACKLIGHT
#ifdef CONFIG_LCD_PWM
#if defined(CONFIG_LCD_BACKLIGHT) && defined(CONFIG_LCD_PWM)
uint32_t frac;
uint32_t duty;
@ -1052,12 +1068,12 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power)
{
duty--;
}
putreg16((uint16_t)duty, STM32_TIM1_CCR1);
#else
/* Turn the backlight on */
stm32_gpiowrite(GPIO_LCD_BACKLIGHT, true);
#endif
#endif
/* Then turn the display on */
@ -1110,6 +1126,133 @@ static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
return -ENOSYS;
}
/****************************************************************************
* Name: stm3210e_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
* strucure 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 stm3210e_pm_notify(struct pm_callback_s *cb , enum pm_state_e pmstate)
{
#ifdef CONFIG_LCD_PWM
uint32_t frac;
uint32_t duty;
#endif
switch (pmstate)
{
case(PM_NORMAL):
{
/* Restore normal LCD operation */
#ifdef CONFIG_LCD_PWM
frac = (g_lcddev.power << 16) / CONFIG_LCD_MAXPOWER;
duty = (g_lcddev.reload * frac) >> 16;
if (duty > 0)
{
duty--;
}
putreg16((uint16_t)duty, STM32_TIM1_CCR1);
#endif
}
break;
case(PM_IDLE):
{
/* Entering IDLE mode - Turn display off */
#ifdef CONFIG_LCD_PWM
lldbg("power:%d \n", g_lcddev.power);
putreg16(0, STM32_TIM1_CCR1);
#endif
}
break;
case(PM_STANDBY):
{
/* Entering STANDBY mode - Logic for PM_STANDBY goes here */
}
break;
case(PM_SLEEP):
{
/* Entering SLEEP mode - Logic for PM_SLEEP goes here */
}
break;
default:
{
/* Should not get here */
}
break;
}
}
#endif
/****************************************************************************
* Name: stm3210e_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
* strucure 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 stm3210e_pm_prepare(struct pm_callback_s *cb , enum pm_state_e pmstate)
{
/* No preparation to change power modes is required by the LCD driver. We always
* accept the state change by returning OK.
*/
return OK;
}
#endif
/**************************************************************************************
* Name: stm3210e_lcdinitialize
*
@ -1309,6 +1452,8 @@ static inline void stm3210e_lcdinitialize(void)
#endif
{
#ifndef CONFIG_STM32_AM240320_DISABLE
/* Set the LCD type for the AM240320 */
g_lcddev.type = LCD_TYPE_AM240320;
lcddbg("LCD type: %d\n", g_lcddev.type);
@ -1586,8 +1731,22 @@ static void stm3210e_backlight(void)
int up_lcdinitialize(void)
{
#ifdef CONFIG_PM
int ret;
#endif
gvdbg("Initializing\n");
/* Register to receive power management callbacks */
#ifdef CONFIG_PM
ret = pm_register(&g_lcdcb);
if (ret =! OK)
{
lcddbg("ERROR: pm_register failed: %d\n", ret);
}
#endif
/* Configure GPIO pins and configure the FSMC to support the LCD */
stm32_selectlcd();