diff mbox series

[3/4] mailbox: arm_mhu: Match only if compatible is "arm,mhu"

Message ID 20200928114445.19689-4-sudeep.holla@arm.com
State Superseded
Headers show
Series mailbox: arm_mhu: Add ARM MHU doorbell controller driver | expand

Commit Message

Sudeep Holla Sept. 28, 2020, 11:44 a.m. UTC
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>

---
 drivers/mailbox/arm_mhu.c | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.17.1
diff mbox series

Patch

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)