Commit 7a872b6f authored by Keerthy's avatar Keerthy Committed by Santosh Shilimkar
Browse files

soc: ti: wkup_m3_ipc: Add rtc_only with ddr in self refresh mode support 



Adds rtc_only support. This needs resume function to shutdown and
reboot the m3.

Signed-off-by: default avatarKeerthy <j-keerthy@ti.com>
Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
parent 38853979

drivers/soc/ti/wkup_m3_ipc.c

+41 −0
Original line number Diff line number Diff line
@@ -329,12 +329,24 @@ static int wkup_m3_finish_low_power(struct wkup_m3_ipc *m3_ipc) 
	return 0;

}



/**

 * wkup_m3_set_rtc_only - Set the rtc_only flag

 * @wkup_m3_wakeup: struct wkup_m3_wakeup_src * gets assigned the

 *                  wakeup src value

 */

static void wkup_m3_set_rtc_only(struct wkup_m3_ipc *m3_ipc)

{

	if (m3_ipc_state)

		m3_ipc_state->is_rtc_only = true;

}



static struct wkup_m3_ipc_ops ipc_ops = {

	.set_mem_type = wkup_m3_set_mem_type,

	.set_resume_address = wkup_m3_set_resume_address,

	.prepare_low_power = wkup_m3_prepare_low_power,

	.finish_low_power = wkup_m3_finish_low_power,

	.request_pm_status = wkup_m3_request_pm_status,

	.set_rtc_only = wkup_m3_set_rtc_only,

};



/**
@@ -484,6 +496,32 @@ static int wkup_m3_ipc_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

static int wkup_m3_ipc_suspend(struct device *dev)

{

	/*

	 * Nothing needs to be done on suspend even with rtc_only flag set

	 */

	return 0;

}



static int wkup_m3_ipc_resume(struct device *dev)

{

	if (m3_ipc_state->is_rtc_only) {

		rproc_shutdown(m3_ipc_state->rproc);

		rproc_boot(m3_ipc_state->rproc);

	}



	m3_ipc_state->is_rtc_only = false;



	return 0;

}



static const struct dev_pm_ops wkup_m3_ipc_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(wkup_m3_ipc_suspend, wkup_m3_ipc_resume)

};

#endif



static const struct of_device_id wkup_m3_ipc_of_match[] = {

	{ .compatible = "ti,am3352-wkup-m3-ipc", },

	{ .compatible = "ti,am4372-wkup-m3-ipc", },
@@ -497,6 +535,9 @@ static struct platform_driver wkup_m3_ipc_driver = { 
	.driver = {

		.name = "wkup_m3_ipc",

		.of_match_table = wkup_m3_ipc_of_match,

#ifdef CONFIG_PM

		.pm = &wkup_m3_ipc_pm_ops,

#endif

	},

};

include/linux/wkup_m3_ipc.h

+3 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ struct wkup_m3_ipc { 
	struct mbox_chan *mbox;



	struct wkup_m3_ipc_ops *ops;

	int is_rtc_only;

};



struct wkup_m3_ipc_ops {
@@ -48,8 +49,10 @@ struct wkup_m3_ipc_ops { 
	int (*prepare_low_power)(struct wkup_m3_ipc *m3_ipc, int state);

	int (*finish_low_power)(struct wkup_m3_ipc *m3_ipc);

	int (*request_pm_status)(struct wkup_m3_ipc *m3_ipc);

	void (*set_rtc_only)(struct wkup_m3_ipc *m3_ipc);

};



struct wkup_m3_ipc *wkup_m3_ipc_get(void);

void wkup_m3_ipc_put(struct wkup_m3_ipc *m3_ipc);

void wkup_m3_set_rtc_only_mode(void);

#endif /* _LINUX_WKUP_M3_IPC_H */