From ab99e237a48298c458d49b8d8bd850e1aa58e457 Mon Sep 17 00:00:00 2001
From: Sudeep Holla <sudeep.holla@arm.com>
Date: Thu, 8 Oct 2020 20:14:51 +0100
Subject: mailbox: arm_mhu: Match only if compatible is "arm,mhu"

Since we will be soon adding a separate driver based on this ARM MHU
driver to support doorbell mode, let us add explicit check to match
the default compatible for this driver. This is needed as the probe
and match reuses the AMBA device ids currently and don't have any
explicit compatible check.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
---
 drivers/mailbox/arm_mhu.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/mailbox/arm_mhu.c')

diff --git a/drivers/mailbox/arm_mhu.c b/drivers/mailbox/arm_mhu.c
index 9da236552bd7..b7fbf276eb62 100644
--- a/drivers/mailbox/arm_mhu.c
+++ b/drivers/mailbox/arm_mhu.c
@@ -113,6 +113,9 @@ static int mhu_probe(struct amba_device *adev, const struct amba_id *id)
 	struct device *dev = &adev->dev;
 	int mhu_reg[MHU_CHANS] = {MHU_LP_OFFSET, MHU_HP_OFFSET, MHU_SEC_OFFSET};
 
+	if (!of_device_is_compatible(dev->of_node, "arm,mhu"))
+		return -ENODEV;
+
 	/* Allocate memory for device */
 	mhu = devm_kzalloc(dev, sizeof(*mhu), GFP_KERNEL);
 	if (!mhu)
-- 
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