[PATCH 4/5] iommu: sun50i: Add H616 compatible string

From: Andre Przywara <andre.przywara@arm.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>, Rob Herring <robh@kernel.org>
Cc: Chris Morgan <macromorgan@hotmail.com>,
	Ryan Walklin <ryan@testtoast.com>,
	iommu@lists.linux.dev, devicetree@vger.kernel.org,
	linux-sunxi@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/5] iommu: sun50i: Add H616 compatible string
Date: Fri, 31 May 2024 00:37:59 +0100	[thread overview]
Message-ID: <20240530233800.27705-5-andre.przywara@arm.com> (raw)
In-Reply-To: <20240530233800.27705-1-andre.przywara@arm.com>

The IOMMU IP in the Allwinner H616 SoC is *almost* compatible to the H6,
but uses a different reset value for the bypass register, and adds some
more registers.

While a driver *can* be written to support both variants (which we in
fact do), the hardware itself is not fully compatible, so we require a
separate compatible string.

Add the new compatible string to the list, but without changing the
behaviour, since the driver already supports both variants.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/iommu/sun50i-iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c
index c3244db5ac02f..478a4e8e94a89 100644
--- a/drivers/iommu/sun50i-iommu.c
+++ b/drivers/iommu/sun50i-iommu.c
@@ -1059,6 +1059,7 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
 
 static const struct of_device_id sun50i_iommu_dt[] = {
 	{ .compatible = "allwinner,sun50i-h6-iommu", },
+	{ .compatible = "allwinner,sun50i-h616-iommu", },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, sun50i_iommu_dt);
-- 
2.35.8

