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Commit 2613adda authored by Hanumant Singh's avatar Hanumant Singh
Browse files

esoc: mdm-4x: Handle primary soc reset 



Force cold reset of mdm in case of a restart or poweroff
of the primary soc.

Change-Id: I786f867d490486a9ec08ab90136ffa890db7d386
Signed-off-by: default avatarHanumant Singh <hanumant@codeaurora.org>
parent 51573322

drivers/esoc/esoc-mdm-4x.c

+9 −0
Original line number Diff line number Diff line
@@ -545,6 +545,15 @@ static void mdm_notify(enum esoc_notify notify, struct esoc_clink *esoc) 
					      !mdm->soft_reset_inverted);

		}

		break;

	case ESOC_PRIMARY_REBOOT:

		dev_dbg(mdm->dev, "Triggering mdm cold reset");

		mdm->ready = 0;

		gpio_direction_output(MDM_GPIO(mdm, AP2MDM_SOFT_RESET),

				!!mdm->soft_reset_inverted);

		mdelay(300);

		gpio_direction_output(MDM_GPIO(mdm, AP2MDM_SOFT_RESET),

				!mdm->soft_reset_inverted);

		break;

	};

	return;

}

drivers/esoc/esoc-mdm-drv.c

+18 −1
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 


#include <linux/delay.h>

#include <linux/workqueue.h>

#include <linux/reboot.h>

#include "esoc.h"



enum {
@@ -36,10 +37,22 @@ struct mdm_drv { 
	bool boot_fail;

	struct workqueue_struct *mdm_queue;

	struct work_struct ssr_work;

	struct notifier_block esoc_restart;

};



#define to_mdm_drv(d)	container_of(d, struct mdm_drv, cmd_eng)



static int esoc_msm_restart_handler(struct notifier_block *nb,

		unsigned long action, void *data)

{

	struct mdm_drv *mdm_drv = container_of(nb, struct mdm_drv,

					esoc_restart);

	struct esoc_clink *esoc_clink = mdm_drv->esoc_clink;

	const struct esoc_clink_ops const *clink_ops = esoc_clink->clink_ops;



	dev_dbg(&esoc_clink->dev, "Notifying esoc of cold reboot\n");

	clink_ops->notify(ESOC_PRIMARY_REBOOT, esoc_clink);

	return NOTIFY_OK;

}

static void mdm_handle_clink_evt(enum esoc_evt evt,

					struct esoc_eng *eng)

{
@@ -226,6 +239,10 @@ int esoc_ssr_probe(struct esoc_clink *esoc_clink) 
	mdm_drv->esoc_clink = esoc_clink;

	mdm_drv->mode = PWR_OFF;

	mdm_drv->boot_fail = false;

	mdm_drv->esoc_restart.notifier_call = esoc_msm_restart_handler;

	ret = register_reboot_notifier(&mdm_drv->esoc_restart);

	if (ret)

		dev_err(&esoc_clink->dev, "register for reboot failed\n");

	return 0;

queue_err:

	esoc_clink_unregister_ssr(esoc_clink);

include/uapi/linux/esoc_ctrl.h

+1 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ enum esoc_notify { 
	ESOC_DEBUG_DONE,

	ESOC_DEBUG_FAIL,

	ESOC_PRIMARY_CRASH,

	ESOC_PRIMARY_REBOOT,

};



enum esoc_req {