Commit bafc19c3 authored May 26, 2017 by Ramakrishnan Ganesh Committed by Gerrit - the friendly Code Review server Jul 31, 2017

soc: qcom: sleepstate: Enable/Disable IPCRTR wakelocks



The acquiring of wakelock prevents the system from entering
suspend for high frequency non-wakeup sensor requests. With
this change IPCRTR now does not acquire a wakelock while cpu
is out of suspend. This allows the cpu to enter suspend.
The wakelocks are enabled in the suspend path so that future
wakeup capable sensor events gets handled without issues.
The wakelocks are disabled post resume from suspend.
This change affects only the data on the SLPI edge.

Change-Id: Iae3dafb735bfb0d3000487f2fa2216d68e9a026f
Signed-off-by: Ramakrishnan Ganesh <ramakris@codeaurora.org>

parent 5f300da0

drivers/soc/qcom/smp2p_sleepstate.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,8 @@
		#include <linux/of_gpio.h>
		#include <linux/platform_device.h>
		#include <linux/suspend.h>
		#include <linux/delay.h>
		#include <linux/ipc_router.h>
		#include "smp2p_private.h"

		#define SET_DELAY (2 * HZ)
		@@ -35,10 +37,14 @@ static int sleepstate_pm_notifier(struct notifier_block *nb,
		switch (event) {
		case PM_SUSPEND_PREPARE:
		gpio_set_value(slst_gpio_base_id + PROC_AWAKE_ID, 0);
		msleep(25); /* To be tuned based on SMP2P latencies */
		msm_ipc_router_set_ws_allowed(true);
		break;

		case PM_POST_SUSPEND:
		gpio_set_value(slst_gpio_base_id + PROC_AWAKE_ID, 1);
		msleep(25); /* To be tuned based on SMP2P latencies */
		msm_ipc_router_set_ws_allowed(false);
		break;
		}
		return NOTIFY_DONE;