diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h
index 2422e185d400..70e9cc2ee96b 100644
--- a/drivers/tee/optee/optee_msg.h
+++ b/drivers/tee/optee/optee_msg.h
@@ -318,6 +318,13 @@ struct optee_msg_arg {
  * [in] param[0].u.rmem.shm_ref		holds shared memory reference
  * [in] param[0].u.rmem.offs		0
  * [in] param[0].u.rmem.size		0
+ *
+ * OPTEE_MSG_CMD_DO_BOTTOM_HALF does the scheduled bottom half processing
+ * of a driver.
+ *
+ * OPTEE_MSG_CMD_STOP_ASYNC_NOTIF informs secure world that from now is
+ * normal world unable to process asynchronous notifications. Typically
+ * used when the driver is shut down.
  */
 #define OPTEE_MSG_CMD_OPEN_SESSION	0
 #define OPTEE_MSG_CMD_INVOKE_COMMAND	1
@@ -325,6 +332,8 @@ struct optee_msg_arg {
 #define OPTEE_MSG_CMD_CANCEL		3
 #define OPTEE_MSG_CMD_REGISTER_SHM	4
 #define OPTEE_MSG_CMD_UNREGISTER_SHM	5
+#define OPTEE_MSG_CMD_DO_BOTTOM_HALF	6
+#define OPTEE_MSG_CMD_STOP_ASYNC_NOTIF	7
 #define OPTEE_MSG_FUNCID_CALL_WITH_ARG	0x0004
 
 #endif /* _OPTEE_MSG_H */
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
index 68fd28f8c6e9..46f74ab07c7e 100644
--- a/drivers/tee/optee/optee_private.h
+++ b/drivers/tee/optee/optee_private.h
@@ -53,6 +53,7 @@ struct optee_call_queue {
 
 struct optee_notif {
 	u_int max_key;
+	struct tee_context *ctx;
 	/* Serializes access to the elements below in this struct */
 	spinlock_t lock;
 	struct list_head db;
@@ -88,6 +89,7 @@ struct optee_smc {
 	optee_invoke_fn *invoke_fn;
 	void *memremaped_shm;
 	u32 sec_caps;
+	unsigned int notif_irq;
 };
 
 /**
diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h
index 80eb763a8a80..c14a7cf1f62c 100644
--- a/drivers/tee/optee/optee_smc.h
+++ b/drivers/tee/optee/optee_smc.h
@@ -107,6 +107,12 @@ struct optee_smc_call_get_os_revision_result {
 /*
  * Call with struct optee_msg_arg as argument
  *
+ * When calling this function normal world has a few responsibilities:
+ * 1. It must be able to handle eventual RPCs
+ * 2. Non-secure interrupts should not be masked
+ * 3. If asynchronous notifications has been negotiated successfully, then
+ *    asynchronous notifications should be unmasked during this call.
+ *
  * Call register usage:
  * a0	SMC Function ID, OPTEE_SMC*CALL_WITH_ARG
  * a1	Upper 32 bits of a 64-bit physical pointer to a struct optee_msg_arg
@@ -195,7 +201,8 @@ struct optee_smc_get_shm_config_result {
  * Normal return register usage:
  * a0	OPTEE_SMC_RETURN_OK
  * a1	bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
- * a2-7	Preserved
+ * a2	The maximum secure world notification number
+ * a3-7	Preserved
  *
  * Error return register usage:
  * a0	OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world
@@ -218,6 +225,8 @@ struct optee_smc_get_shm_config_result {
 #define OPTEE_SMC_SEC_CAP_VIRTUALIZATION	BIT(3)
 /* Secure world supports Shared Memory with a NULL reference */
 #define OPTEE_SMC_SEC_CAP_MEMREF_NULL		BIT(4)
+/* Secure world supports asynchronous notification of normal world */
+#define OPTEE_SMC_SEC_CAP_ASYNC_NOTIF		BIT(5)
 
 #define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES	9
 #define OPTEE_SMC_EXCHANGE_CAPABILITIES \
@@ -226,8 +235,8 @@ struct optee_smc_get_shm_config_result {
 struct optee_smc_exchange_capabilities_result {
 	unsigned long status;
 	unsigned long capabilities;
+	unsigned long max_notif_value;
 	unsigned long reserved0;
-	unsigned long reserved1;
 };
 
 /*
@@ -319,6 +328,68 @@ struct optee_smc_disable_shm_cache_result {
 #define OPTEE_SMC_GET_THREAD_COUNT \
 	OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_THREAD_COUNT)
 
+/*
+ * Inform OP-TEE that normal world is able to receive asynchronous
+ * notifications.
+ *
+ * Call requests usage:
+ * a0	SMC Function ID, OPTEE_SMC_ENABLE_ASYNC_NOTIF
+ * a1-6	Not used
+ * a7	Hypervisor Client ID register
+ *
+ * Normal return register usage:
+ * a0	OPTEE_SMC_RETURN_OK
+ * a1-7	Preserved
+ *
+ * Not supported return register usage:
+ * a0	OPTEE_SMC_RETURN_ENOTAVAIL
+ * a1-7	Preserved
+ */
+#define OPTEE_SMC_FUNCID_ENABLE_ASYNC_NOTIF	16
+#define OPTEE_SMC_ENABLE_ASYNC_NOTIF \
+	OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_ASYNC_NOTIF)
+
+/*
+ * Retrieve a value of notifications pending since the last call of this
+ * function.
+ *
+ * OP-TEE keeps a record of all posted values. When an interrupts is
+ * received which indicates that there are posed values this function
+ * should be called until all pended values have been retrieved. When a
+ * value is retrieved, it's cleared from the record in secure world.
+ *
+ * Call requests usage:
+ * a0	SMC Function ID, OPTEE_SMC_GET_ASYNC_NOTIF_VALUE
+ * a1-6	Not used
+ * a7	Hypervisor Client ID register
+ *
+ * Normal return register usage:
+ * a0	OPTEE_SMC_RETURN_OK
+ * a1	value
+ * a2	Bit[0]: OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID if the value in a1 is
+ *		valid, else 0 if no values where pending
+ * a2	Bit[1]: OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING if another value is
+ *		pending, else 0.
+ *	Bit[31:2]: MBZ
+ * a3-7	Preserved
+ *
+ * Not supported return register usage:
+ * a0	OPTEE_SMC_RETURN_ENOTAVAIL
+ * a1-7	Preserved
+ */
+#define OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID	BIT(0)
+#define OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING	BIT(1)
+
+/*
+ * Notification that OP-TEE expects a yielding call to do some bottom half
+ * work in a driver.
+ */
+#define OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF	0
+
+#define OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE	17
+#define OPTEE_SMC_GET_ASYNC_NOTIF_VALUE \
+	OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE)
+
 /*
  * Resume from RPC (for example after processing a foreign interrupt)
  *
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
index 00a7ff00a7c0..9fa1bcdcf5e6 100644
--- a/drivers/tee/optee/smc_abi.c
+++ b/drivers/tee/optee/smc_abi.c
@@ -8,13 +8,16 @@
 
 #include <linux/arm-smccc.h>
 #include <linux/errno.h>
+#include <linux/interrupt.h>
 #include <linux/io.h>
-#include <linux/sched.h>
+#include <linux/irqdomain.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/tee_drv.h>
@@ -34,7 +37,8 @@
  * 2. Low level support functions to register shared memory in secure world
  * 3. Dynamic shared memory pool based on alloc_pages()
  * 4. Do a normal scheduled call into secure world
- * 5. Driver initialization.
+ * 5. Asynchronous notifcation
+ * 6. Driver initialization.
  */
 
 #define OPTEE_SHM_NUM_PRIV_PAGES	CONFIG_OPTEE_SHM_NUM_PRIV_PAGES
@@ -875,8 +879,135 @@ static int optee_smc_do_call_with_arg(struct tee_context *ctx,
 	return rc;
 }
 
+static int simple_call_with_arg(struct tee_context *ctx, u32 cmd)
+{
+	struct optee_msg_arg *msg_arg;
+	struct tee_shm *shm;
+
+	shm = optee_get_msg_arg(ctx, 0, &msg_arg);
+	if (IS_ERR(shm))
+		return PTR_ERR(shm);
+
+	msg_arg->cmd = cmd;
+	optee_smc_do_call_with_arg(ctx, shm);
+
+	tee_shm_free(shm);
+	return 0;
+}
+
+static int optee_smc_do_bottom_half(struct tee_context *ctx)
+{
+	return simple_call_with_arg(ctx, OPTEE_MSG_CMD_DO_BOTTOM_HALF);
+}
+
+static int optee_smc_stop_async_notif(struct tee_context *ctx)
+{
+	return simple_call_with_arg(ctx, OPTEE_MSG_CMD_STOP_ASYNC_NOTIF);
+}
+
 /*
- * 5. Driver initialization
+ * 5. Asynchronous notifcation
+ */
+
+static u32 get_async_notif_value(optee_invoke_fn *invoke_fn, bool *value_valid,
+				 bool *value_pending)
+{
+	struct arm_smccc_res res;
+
+	invoke_fn(OPTEE_SMC_GET_ASYNC_NOTIF_VALUE, 0, 0, 0, 0, 0, 0, 0, &res);
+
+	if (res.a0)
+		return 0;
+	*value_valid = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID);
+	*value_pending = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING);
+	return res.a1;
+}
+
+static irqreturn_t notif_irq_handler(int irq, void *dev_id)
+{
+	struct optee *optee = dev_id;
+	bool do_bottom_half = false;
+	bool value_valid;
+	bool value_pending;
+	u32 value;
+
+	do {
+		value = get_async_notif_value(optee->smc.invoke_fn,
+					      &value_valid, &value_pending);
+		if (!value_valid)
+			break;
+
+		if (value == OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF)
+			do_bottom_half = true;
+		else
+			optee_notif_send(optee, value);
+	} while (value_pending);
+
+	if (do_bottom_half)
+		return IRQ_WAKE_THREAD;
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t notif_irq_thread_fn(int irq, void *dev_id)
+{
+	struct optee *optee = dev_id;
+
+	optee_smc_do_bottom_half(optee->notif.ctx);
+
+	return IRQ_HANDLED;
+}
+
+static int optee_smc_notif_init_irq(struct optee *optee, u_int irq)
+{
+	struct tee_context *ctx;
+	int rc;
+
+	ctx = teedev_open(optee->teedev);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+
+	optee->notif.ctx = ctx;
+	rc = request_threaded_irq(irq, notif_irq_handler,
+				  notif_irq_thread_fn,
+				  0, "optee_notification", optee);
+	if (rc)
+		goto err_close_ctx;
+
+	optee->smc.notif_irq = irq;
+
+	return 0;
+
+err_close_ctx:
+	teedev_close_context(optee->notif.ctx);
+	optee->notif.ctx = NULL;
+
+	return rc;
+}
+
+static void optee_smc_notif_uninit_irq(struct optee *optee)
+{
+	if (optee->notif.ctx) {
+		optee_smc_stop_async_notif(optee->notif.ctx);
+		if (optee->smc.notif_irq) {
+			free_irq(optee->smc.notif_irq, optee);
+			irq_dispose_mapping(optee->smc.notif_irq);
+		}
+
+		/*
+		 * The thread normally working with optee->notif.ctx was
+		 * stopped with free_irq() above.
+		 *
+		 * Note we're not using teedev_close_context() or
+		 * tee_client_close_context() since we have already called
+		 * tee_device_put() while initializing to avoid a circular
+		 * reference counting.
+		 */
+		teedev_close_context(optee->notif.ctx);
+	}
+}
+
+/*
+ * 6. Driver initialization
  *
  * During driver inititialization is secure world probed to find out which
  * features it supports so the driver can be initialized with a matching
@@ -950,6 +1081,17 @@ static const struct optee_ops optee_ops = {
 	.from_msg_param = optee_from_msg_param,
 };
 
+static int enable_async_notif(optee_invoke_fn *invoke_fn)
+{
+	struct arm_smccc_res res;
+
+	invoke_fn(OPTEE_SMC_ENABLE_ASYNC_NOTIF, 0, 0, 0, 0, 0, 0, 0, &res);
+
+	if (res.a0)
+		return -EINVAL;
+	return 0;
+}
+
 static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn)
 {
 	struct arm_smccc_res res;
@@ -999,7 +1141,7 @@ static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn)
 }
 
 static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn,
-					    u32 *sec_caps)
+					    u32 *sec_caps, u32 *max_notif_value)
 {
 	union {
 		struct arm_smccc_res smccc;
@@ -1022,6 +1164,11 @@ static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn,
 		return false;
 
 	*sec_caps = res.result.capabilities;
+	if (*sec_caps & OPTEE_SMC_SEC_CAP_ASYNC_NOTIF)
+		*max_notif_value = res.result.max_notif_value;
+	else
+		*max_notif_value = OPTEE_DEFAULT_MAX_NOTIF_VALUE;
+
 	return true;
 }
 
@@ -1186,6 +1333,8 @@ static int optee_smc_remove(struct platform_device *pdev)
 	 */
 	optee_disable_shm_cache(optee);
 
+	optee_smc_notif_uninit_irq(optee);
+
 	optee_remove_common(optee);
 
 	if (optee->smc.memremaped_shm)
@@ -1215,6 +1364,7 @@ static int optee_probe(struct platform_device *pdev)
 	struct optee *optee = NULL;
 	void *memremaped_shm = NULL;
 	struct tee_device *teedev;
+	u32 max_notif_value;
 	u32 sec_caps;
 	int rc;
 
@@ -1234,7 +1384,8 @@ static int optee_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) {
+	if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps,
+					     &max_notif_value)) {
 		pr_warn("capabilities mismatch\n");
 		return -EINVAL;
 	}
@@ -1257,7 +1408,7 @@ static int optee_probe(struct platform_device *pdev)
 	optee = kzalloc(sizeof(*optee), GFP_KERNEL);
 	if (!optee) {
 		rc = -ENOMEM;
-		goto err;
+		goto err_free_pool;
 	}
 
 	optee->ops = &optee_ops;
@@ -1267,24 +1418,24 @@ static int optee_probe(struct platform_device *pdev)
 	teedev = tee_device_alloc(&optee_clnt_desc, NULL, pool, optee);
 	if (IS_ERR(teedev)) {
 		rc = PTR_ERR(teedev);
-		goto err;
+		goto err_free_optee;
 	}
 	optee->teedev = teedev;
 
 	teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee);
 	if (IS_ERR(teedev)) {
 		rc = PTR_ERR(teedev);
-		goto err;
+		goto err_unreg_teedev;
 	}
 	optee->supp_teedev = teedev;
 
 	rc = tee_device_register(optee->teedev);
 	if (rc)
-		goto err;
+		goto err_unreg_supp_teedev;
 
 	rc = tee_device_register(optee->supp_teedev);
 	if (rc)
-		goto err;
+		goto err_unreg_supp_teedev;
 
 	mutex_init(&optee->call_queue.mutex);
 	INIT_LIST_HEAD(&optee->call_queue.waiters);
@@ -1293,10 +1444,27 @@ static int optee_probe(struct platform_device *pdev)
 	optee->pool = pool;
 
 	platform_set_drvdata(pdev, optee);
-	rc = optee_notif_init(optee, OPTEE_DEFAULT_MAX_NOTIF_VALUE);
-	if (rc) {
-		optee_remove(pdev);
-		return rc;
+	rc = optee_notif_init(optee, max_notif_value);
+	if (rc)
+		goto err_supp_uninit;
+
+	if (sec_caps & OPTEE_SMC_SEC_CAP_ASYNC_NOTIF) {
+		unsigned int irq;
+
+		rc = platform_get_irq(pdev, 0);
+		if (rc < 0) {
+			pr_err("platform_get_irq: ret %d\n", rc);
+			goto err_notif_uninit;
+		}
+		irq = rc;
+
+		rc = optee_smc_notif_init_irq(optee, irq);
+		if (rc) {
+			irq_dispose_mapping(irq);
+			goto err_notif_uninit;
+		}
+		enable_async_notif(optee->smc.invoke_fn);
+		pr_info("Asynchronous notifications enabled\n");
 	}
 
 	/*
@@ -1314,28 +1482,30 @@ static int optee_probe(struct platform_device *pdev)
 		pr_info("dynamic shared memory is enabled\n");
 
 	rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES);
-	if (rc) {
-		optee_smc_remove(pdev);
-		return rc;
-	}
+	if (rc)
+		goto err_disable_shm_cache;
 
 	pr_info("initialized driver\n");
 	return 0;
-err:
-	if (optee) {
-		/*
-		 * tee_device_unregister() is safe to call even if the
-		 * devices hasn't been registered with
-		 * tee_device_register() yet.
-		 */
-		tee_device_unregister(optee->supp_teedev);
-		tee_device_unregister(optee->teedev);
-		kfree(optee);
-	}
-	if (pool)
-		tee_shm_pool_free(pool);
-	if (memremaped_shm)
-		memunmap(memremaped_shm);
+
+err_disable_shm_cache:
+	optee_disable_shm_cache(optee);
+	optee_smc_notif_uninit_irq(optee);
+err_notif_uninit:
+	optee_notif_uninit(optee);
+err_supp_uninit:
+	optee_supp_uninit(&optee->supp);
+	mutex_destroy(&optee->call_queue.mutex);
+err_unreg_supp_teedev:
+	tee_device_unregister(optee->supp_teedev);
+err_unreg_teedev:
+	tee_device_unregister(optee->teedev);
+err_free_optee:
+	kfree(optee);
+err_free_pool:
+	tee_shm_pool_free(pool);
+	if (optee->smc.memremaped_shm)
+		memunmap(optee->smc.memremaped_shm);
 	return rc;
 }
 
