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Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-pwm@vger.kernel.org, linux-pm@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Subject: Re: [PATCH 03/10] dt-bindings: dma: convert bcm2835-dma bindings to YAML Message-ID: <20230609214828.GA2519714-robh@kernel.org> References: <20230604121223.9625-1-stefan.wahren@i2se.com> <20230604121223.9625-4-stefan.wahren@i2se.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230604121223.9625-4-stefan.wahren@i2se.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230609_144833_635573_A13ACE7F X-CRM114-Status: GOOD ( 29.28 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Jun 04, 2023 at 02:12:16PM +0200, Stefan Wahren wrote: > Convert the DT binding document for bcm2835-dma from .txt to YAML. > Since brcm,dma-channel-mask is considered deprecated use the > generic property. > > Signed-off-by: Stefan Wahren > --- > .../bindings/dma/brcm,bcm2835-dma.txt | 83 ---------------- > .../bindings/dma/brcm,bcm2835-dma.yaml | 98 +++++++++++++++++++ > 2 files changed, 98 insertions(+), 83 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.txt > create mode 100644 Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.yaml > > diff --git a/Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.txt b/Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.txt > deleted file mode 100644 > index b6a8cc0978cd..000000000000 > --- a/Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.txt > +++ /dev/null > @@ -1,83 +0,0 @@ > -* BCM2835 DMA controller > - > -The BCM2835 DMA controller has 16 channels in total. > -Only the lower 13 channels have an associated IRQ. > -Some arbitrary channels are used by the firmware > -(1,3,6,7 in the current firmware version). > -The channels 0,2 and 3 have special functionality > -and should not be used by the driver. > - > -Required properties: > -- compatible: Should be "brcm,bcm2835-dma". > -- reg: Should contain DMA registers location and length. > -- interrupts: Should contain the DMA interrupts associated > - to the DMA channels in ascending order. > -- interrupt-names: Should contain the names of the interrupt > - in the form "dmaXX". > - Use "dma-shared-all" for the common interrupt line > - that is shared by all dma channels. > -- #dma-cells: Must be <1>, the cell in the dmas property of the > - client device represents the DREQ number. > -- brcm,dma-channel-mask: Bit mask representing the channels > - not used by the firmware in ascending order, > - i.e. first channel corresponds to LSB. > - > -Example: > - > -dma: dma@7e007000 { > - compatible = "brcm,bcm2835-dma"; > - reg = <0x7e007000 0xf00>; > - interrupts = <1 16>, > - <1 17>, > - <1 18>, > - <1 19>, > - <1 20>, > - <1 21>, > - <1 22>, > - <1 23>, > - <1 24>, > - <1 25>, > - <1 26>, > - /* dma channel 11-14 share one irq */ > - <1 27>, > - <1 27>, > - <1 27>, > - <1 27>, > - /* unused shared irq for all channels */ > - <1 28>; > - interrupt-names = "dma0", > - "dma1", > - "dma2", > - "dma3", > - "dma4", > - "dma5", > - "dma6", > - "dma7", > - "dma8", > - "dma9", > - "dma10", > - "dma11", > - "dma12", > - "dma13", > - "dma14", > - "dma-shared-all"; > - > - #dma-cells = <1>; > - brcm,dma-channel-mask = <0x7f35>; > -}; > - > - > -DMA clients connected to the BCM2835 DMA controller must use the format > -described in the dma.txt file, using a two-cell specifier for each channel. > - > -Example: > - > -bcm2835_i2s: i2s@7e203000 { > - compatible = "brcm,bcm2835-i2s"; > - reg = < 0x7e203000 0x24>; > - clocks = <&clocks BCM2835_CLOCK_PCM>; > - > - dmas = <&dma 2>, > - <&dma 3>; > - dma-names = "tx", "rx"; > -}; > diff --git a/Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.yaml b/Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.yaml > new file mode 100644 > index 000000000000..a09000a8131f > --- /dev/null > +++ b/Documentation/devicetree/bindings/dma/brcm,bcm2835-dma.yaml > @@ -0,0 +1,98 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/dma/brcm,bcm2835-dma.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: BCM2835 DMA controller > + > +maintainers: > + - Nicolas Saenz Julienne > + > +description: > + The BCM2835 DMA controller has 16 channels in total. Only the lower > + 13 channels have an associated IRQ. Some arbitrary channels are used by the > + VideoCore firmware (1,3,6,7 in the current firmware version). The channels > + 0, 2 and 3 have special functionality and should not be used by the driver. > + > +allOf: > + - $ref: "dma-controller.yaml#" Drop quotes. Please check elsewhere in the series. With that fixed, Reviewed-by: Rob Herring > + > +properties: > + compatible: > + const: brcm,bcm2835-dma > + > + reg: > + maxItems: 1 > + > + interrupts: > + description: > + Should contain the DMA interrupts associated to the DMA channels in > + ascending order. > + minItems: 1 > + maxItems: 16 > + > + interrupt-names: > + minItems: 1 > + maxItems: 16 > + > + '#dma-cells': > + description: The single cell represents the DREQ number. > + const: 1 > + > + dma-channel-mask: > + maxItems: 1 > + > +required: > + - compatible > + - reg > + - interrupts > + - "#dma-cells" > + - dma-channel-mask > + > +unevaluatedProperties: false > + > +examples: > + - | > + dma-controller@7e007000 { > + compatible = "brcm,bcm2835-dma"; > + reg = <0x7e007000 0xf00>; > + interrupts = <1 16>, > + <1 17>, > + <1 18>, > + <1 19>, > + <1 20>, > + <1 21>, > + <1 22>, > + <1 23>, > + <1 24>, > + <1 25>, > + <1 26>, > + /* dma channel 11-14 share one irq */ > + <1 27>, > + <1 27>, > + <1 27>, > + <1 27>, > + /* unused shared irq for all channels */ > + <1 28>; > + interrupt-names = "dma0", > + "dma1", > + "dma2", > + "dma3", > + "dma4", > + "dma5", > + "dma6", > + "dma7", > + "dma8", > + "dma9", > + "dma10", > + "dma11", > + "dma12", > + "dma13", > + "dma14", > + "dma-shared-all"; > + #dma-cells = <1>; > + dma-channel-mask = <0x7f35>; > + }; > + > +... > -- > 2.34.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel