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Commit cd31a4e4 authored by AnilKumar Chimata's avatar AnilKumar Chimata Committed by Anmolpreet Kaur
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smcinvoke: Add suspend resume support 



Add suspend resume hooks to smcinvoke driver to take
necessary action during low power mode.

Change-Id: I9d50c4fba01d8cfe97d89e4b6dbcf20e578fe271
Signed-off-by: default avatarAnilKumar Chimata <anilc@codeaurora.org>
parent 49a88c6f

drivers/soc/qcom/smcinvoke.c

+22 −0
Original line number Diff line number Diff line
@@ -139,6 +139,7 @@ static LIST_HEAD(g_mem_objs); 
static uint16_t g_last_cb_server_id = CBOBJ_SERVER_ID_START;

static uint16_t g_last_mem_rgn_id, g_last_mem_map_obj_id;

static size_t g_max_cb_buf_size = SMCINVOKE_TZ_MIN_BUF_SIZE;

static unsigned int cb_reqs_inflight;



static long smcinvoke_ioctl(struct file *, unsigned int, unsigned long);

static int smcinvoke_open(struct inode *, struct file *);
@@ -944,6 +945,7 @@ static void process_tzcb_req(void *buf, size_t buf_len, struct file **arr_filp) 
	kref_init(&cb_txn->ref_cnt);



	mutex_lock(&g_smcinvoke_lock);

	++cb_reqs_inflight;

	srvr_info = get_cb_server_locked(

				TZHANDLE_GET_SERVER(cb_req->hdr.tzhandle));

	if (!srvr_info || srvr_info->state == SMCINVOKE_SERVER_STATE_DEFUNCT) {
@@ -985,6 +987,7 @@ static void process_tzcb_req(void *buf, size_t buf_len, struct file **arr_filp) 
		pr_debug("%s wait_event interrupted ret = %d\n", __func__, ret);

		cb_req->result = OBJECT_ERROR_ABORT;

	}

	--cb_reqs_inflight;

	memcpy(buf, cb_req, buf_len);

	kref_put(&cb_txn->ref_cnt, delete_cb_txn);

	if (srvr_info)
@@ -1877,6 +1880,7 @@ static int smcinvoke_probe(struct platform_device *pdev) 
		goto exit_destroy_device;

	}

	smcinvoke_pdev = pdev;

	cb_reqs_inflight = 0;



	return  0;
@@ -1900,6 +1904,22 @@ static int smcinvoke_remove(struct platform_device *pdev) 
	return 0;

}



static int __maybe_unused smcinvoke_suspend(struct platform_device *pdev,

					pm_message_t state)

{

	if (cb_reqs_inflight) {

		pr_err("Failed to suspend smcinvoke driver\n");

		return -EIO;

	}



	return 0;

}



static int __maybe_unused smcinvoke_resume(struct platform_device *pdev)

{

	return 0;

}



static const struct of_device_id smcinvoke_match[] = {

	{

		.compatible = "qcom,smcinvoke",
@@ -1910,6 +1930,8 @@ static const struct of_device_id smcinvoke_match[] = { 
static struct platform_driver smcinvoke_plat_driver = {

	.probe = smcinvoke_probe,

	.remove = smcinvoke_remove,

	.suspend = smcinvoke_suspend,

	.resume = smcinvoke_resume,

	.driver = {

		.name = "smcinvoke",

		.of_match_table = smcinvoke_match,