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Received: from bhuna.collabora.co.uk ([46.235.227.227]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lZThq-00DS5E-Kz; Thu, 22 Apr 2021 07:25:00 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: benjamin.gaignard) with ESMTPSA id 1D6131F430FB From: Benjamin Gaignard To: joro@8bytes.org, will@kernel.org, robh+dt@kernel.org, heiko@sntech.de, xxm@rock-chips.com Cc: iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH 1/3] dt-bindings: iommu: rockchip: Convert IOMMU to DT schema Date: Thu, 22 Apr 2021 09:24:40 +0200 Message-Id: <20210422072442.111070-2-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210422072442.111070-1-benjamin.gaignard@collabora.com> References: <20210422072442.111070-1-benjamin.gaignard@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210422_002458_840334_54F26875 X-CRM114-Status: GOOD ( 16.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Convert Rockchip IOMMU to DT schema Signed-off-by: Benjamin Gaignard --- .../bindings/iommu/rockchip,iommu.txt | 38 ---------- .../bindings/iommu/rockchip,iommu.yaml | 76 +++++++++++++++++++ 2 files changed, 76 insertions(+), 38 deletions(-) delete mode 100644 Documentation/devicetree/bindings/iommu/rockchip,iommu.txt create mode 100644 Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt deleted file mode 100644 index 6ecefea1c6f9..000000000000 --- a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt +++ /dev/null @@ -1,38 +0,0 @@ -Rockchip IOMMU -============== - -A Rockchip DRM iommu translates io virtual addresses to physical addresses for -its master device. Each slave device is bound to a single master device, and -shares its clocks, power domain and irq. - -Required properties: -- compatible : Should be "rockchip,iommu" -- reg : Address space for the configuration registers -- interrupts : Interrupt specifier for the IOMMU instance -- interrupt-names : Interrupt name for the IOMMU instance -- #iommu-cells : Should be <0>. This indicates the iommu is a - "single-master" device, and needs no additional information - to associate with its master device. See: - Documentation/devicetree/bindings/iommu/iommu.txt -- clocks : A list of clocks required for the IOMMU to be accessible by - the host CPU. -- clock-names : Should contain the following: - "iface" - Main peripheral bus clock (PCLK/HCL) (required) - "aclk" - AXI bus clock (required) - -Optional properties: -- rockchip,disable-mmu-reset : Don't use the mmu reset operation. - Some mmu instances may produce unexpected results - when the reset operation is used. - -Example: - - vopl_mmu: iommu@ff940300 { - compatible = "rockchip,iommu"; - reg = <0xff940300 0x100>; - interrupts = ; - interrupt-names = "vopl_mmu"; - clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>; - clock-names = "aclk", "iface"; - #iommu-cells = <0>; - }; diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml b/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml new file mode 100644 index 000000000000..ab128f8e4c73 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml @@ -0,0 +1,76 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iommu/rockchip,iommu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Rockchip IOMMU + +maintainers: + - Simon Xue + +description: |+ + A Rockchip DRM iommu translates io virtual addresses to physical addresses for + its master device. Each slave device is bound to a single master device, and + shares its clocks, power domain and irq. + + For information on assigning IOMMU controller to its peripheral devices, + see generic IOMMU bindings. + +properties: + compatible: + const: rockchip,iommu + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + interrupt-names: + maxItems: 1 + + clocks: + items: + - description: Core clock + - description: Interface clock + + clock-names: + items: + - const: aclk + - const: iface + + "#iommu-cells": + const: 0 + + rockchip,disable-mmu-reset: + $ref: /schemas/types.yaml#/definitions/flag + description: | + Don't use the mmu reset operation. + Some mmu instances may produce unexpected results + when the reset operation is used. + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - "#iommu-cells" + +additionalProperties: false + +examples: + - | + #include + #include + + vopl_mmu: iommu@ff940300 { + compatible = "rockchip,iommu"; + reg = <0xff940300 0x100>; + interrupts = ; + interrupt-names = "vopl_mmu"; + clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>; + clock-names = "aclk", "iface"; + #iommu-cells = <0>; + };