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drivers/timers: Add maxtimeout method to the struct timer_ops_s interface

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This commit is contained in:
Xiang Xiao 2018-08-24 10:16:17 -06:00 committed by Gregory Nutt
parent 3af35699b9
commit a6c68d233d
2 changed files with 28 additions and 0 deletions
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20
drivers/timers/timer.c
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@ -390,6 +390,26 @@ static int timer_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
} }
break; break;
/* cmd: TCIOC_MAXTIMEOUT
* Description: Get the maximum supported timeout value
* Argument: A 32-bit timeout value in microseconds.
*/
case TCIOC_MAXTIMEOUT:
{
/* Get the maximum supported timeout value */
if (lower->ops->maxtimeout) /* Optional */
{
ret = lower->ops->maxtimeout(lower, (uint32_t *)arg);
}
else
{
ret = -ENOSYS;
}
}
break;
/* Any unrecognized IOCTL commands might be platform-specific ioctl commands */ /* Any unrecognized IOCTL commands might be platform-specific ioctl commands */
default: default:

8
include/nuttx/timers/timer.h
View File

@ -74,6 +74,8 @@
* the timer expires. * the timer expires.
* Argument: A read-only pointer to an instance of * Argument: A read-only pointer to an instance of
* stuct timer_notify_s. * stuct timer_notify_s.
* TCIOC_MAXTIMEOUT - Get the maximum supported timeout value
* Argument: A 32-bit timeout value in microseconds.
* *
* WARNING: May change TCIOC_SETTIMEOUT to pass pointer to 64bit nanoseconds * WARNING: May change TCIOC_SETTIMEOUT to pass pointer to 64bit nanoseconds
* or timespec structure. * or timespec structure.
@ -93,6 +95,7 @@
#define TCIOC_GETSTATUS _TCIOC(0x0003) #define TCIOC_GETSTATUS _TCIOC(0x0003)
#define TCIOC_SETTIMEOUT _TCIOC(0x0004) #define TCIOC_SETTIMEOUT _TCIOC(0x0004)
#define TCIOC_NOTIFICATION _TCIOC(0x0005) #define TCIOC_NOTIFICATION _TCIOC(0x0005)
#define TCIOC_MAXTIMEOUT _TCIOC(0x0006)
/* Bit Settings *************************************************************/ /* Bit Settings *************************************************************/
/* Bit settings for the struct timer_status_s flags field */ /* Bit settings for the struct timer_status_s flags field */
@ -172,6 +175,11 @@ struct timer_ops_s
CODE int (*ioctl)(FAR struct timer_lowerhalf_s *lower, int cmd, CODE int (*ioctl)(FAR struct timer_lowerhalf_s *lower, int cmd,
unsigned long arg); unsigned long arg);
/* Get the maximum supported timeout value */
CODE int (*maxtimeout)(FAR struct timer_lowerhalf_s *lower,
FAR uint32_t *maxtimeout);
}; };
/* This structure provides the publicly visible representation of the /* This structure provides the publicly visible representation of the