Commit 40eaa8c0 authored by Hector Martin's avatar Hector Martin
Browse files

soc: apple: rtkit: Add apple_rtkit_idle() function 



This is yet another low power mode, used by DCP.

Reviewed-by: default avatarEric Curtin <ecurtin@redhat.com>
Reviewed-by: default avatarSven Peter <sven@svenpeter.dev>
Signed-off-by: default avatarHector Martin <marcan@marcan.st>
parent 1b929c02

drivers/soc/apple/rtkit.c

+21 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
enum {

	APPLE_RTKIT_PWR_STATE_OFF = 0x00, /* power off, cannot be restarted */

	APPLE_RTKIT_PWR_STATE_SLEEP = 0x01, /* sleeping, can be restarted */

	APPLE_RTKIT_PWR_STATE_IDLE = 0x201, /* sleeping, retain state */

	APPLE_RTKIT_PWR_STATE_QUIESCED = 0x10, /* running but no communication */

	APPLE_RTKIT_PWR_STATE_ON = 0x20, /* normal operating state */

};
@@ -881,6 +882,26 @@ int apple_rtkit_shutdown(struct apple_rtkit *rtk) 
}

EXPORT_SYMBOL_GPL(apple_rtkit_shutdown);



int apple_rtkit_idle(struct apple_rtkit *rtk)

{

	int ret;



	/* if OFF is used here the co-processor will not wake up again */

	ret = apple_rtkit_set_ap_power_state(rtk,

					     APPLE_RTKIT_PWR_STATE_IDLE);

	if (ret)

		return ret;



	ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_IDLE);

	if (ret)

		return ret;



	rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_IDLE;

	rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_IDLE;

	return 0;

}

EXPORT_SYMBOL_GPL(apple_rtkit_idle);



int apple_rtkit_quiesce(struct apple_rtkit *rtk)

{

	int ret;

include/linux/soc/apple/rtkit.h

+5 −0
Original line number Diff line number Diff line
@@ -104,6 +104,11 @@ int apple_rtkit_wake(struct apple_rtkit *rtk); 
 */

int apple_rtkit_shutdown(struct apple_rtkit *rtk);



/*

 * Put the co-processor into idle mode

 */

int apple_rtkit_idle(struct apple_rtkit *rtk);



/*

 * Checks if RTKit is running and ready to handle messages.

 */