From: Baolin Wang <baolin.wang@spreadtrum.com> To: <vinod.koul@intel.com>, <robh+dt@kernel.org>, <mark.rutland@arm.com>, <dan.j.williams@intel.com> Cc: <dmaengine@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <broonie@kernel.org>, <baolin.wang@linaro.org>, <baolin.wang@spreadtrum.com> Subject: [PATCH v2 1/2] dt-bindings: dma: Add Spreadtrum SC9860 DMA controller Date: Tue, 29 Aug 2017 16:47:16 +0800 [thread overview] Message-ID: <b7bea49d254da89c43baf2ae02858bf67c59fd1d.1503995645.git.baolin.wang@spreadtrum.com> (raw) This patch adds the binding documentation for Spreadtrum SC9860 DMA controller device. Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com> Acked-by: Rob Herring <robh@kernel.org> --- Changes since v1: - Fix typos. --- Documentation/devicetree/bindings/dma/sprd-dma.txt | 41 ++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/sprd-dma.txt diff --git a/Documentation/devicetree/bindings/dma/sprd-dma.txt b/Documentation/devicetree/bindings/dma/sprd-dma.txt new file mode 100644 index 0000000..7a10fea --- /dev/null +++ b/Documentation/devicetree/bindings/dma/sprd-dma.txt @@ -0,0 +1,41 @@ +* Spreadtrum DMA controller + +This binding follows the generic DMA bindings defined in dma.txt. + +Required properties: +- compatible: Should be "sprd,sc9860-dma". +- reg: Should contain DMA registers location and length. +- interrupts: Should contain one interrupt shared by all channel. +- #dma-cells: must be <1>. Used to represent the number of integer + cells in the dmas property of client device. +- #dma-channels : Number of DMA channels supported. Should be 32. +- clock-names: Should contain the clock of the DMA controller. +- clocks: Should contain a clock specifier for each entry in clock-names. + +Example: + +Controller: +apdma: dma-controller@20100000 { + compatible = "sprd,sc9860-dma"; + reg = <0x20100000 0x4000>; + interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>; + #dma-cells = <1>; + #dma-channels = <32>; + clock-names = "enable"; + clocks = <&clk_ap_ahb_gates 5>; +}; + + +Client: +DMA clients connected to the Spreadtrum DMA controller must use the format +described in the dma.txt file, using a two-cell specifier for each channel. +The two cells in order are: +1. A phandle pointing to the DMA controller. +2. The channel id. + +spi0: spi@70a00000{ + ... + dma-names = "rx_chn", "tx_chn"; + dmas = <&apdma 11>, <&apdma 12>; + ... +}; -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: Baolin Wang <baolin.wang-lxIno14LUO0EEoCn2XhGlw@public.gmane.org> To: vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org Cc: dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, baolin.wang-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, baolin.wang-lxIno14LUO0EEoCn2XhGlw@public.gmane.org Subject: [PATCH v2 1/2] dt-bindings: dma: Add Spreadtrum SC9860 DMA controller Date: Tue, 29 Aug 2017 16:47:16 +0800 [thread overview] Message-ID: <b7bea49d254da89c43baf2ae02858bf67c59fd1d.1503995645.git.baolin.wang@spreadtrum.com> (raw) This patch adds the binding documentation for Spreadtrum SC9860 DMA controller device. Signed-off-by: Baolin Wang <baolin.wang-lxIno14LUO0EEoCn2XhGlw@public.gmane.org> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> --- Changes since v1: - Fix typos. --- Documentation/devicetree/bindings/dma/sprd-dma.txt | 41 ++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/sprd-dma.txt diff --git a/Documentation/devicetree/bindings/dma/sprd-dma.txt b/Documentation/devicetree/bindings/dma/sprd-dma.txt new file mode 100644 index 0000000..7a10fea --- /dev/null +++ b/Documentation/devicetree/bindings/dma/sprd-dma.txt @@ -0,0 +1,41 @@ +* Spreadtrum DMA controller + +This binding follows the generic DMA bindings defined in dma.txt. + +Required properties: +- compatible: Should be "sprd,sc9860-dma". +- reg: Should contain DMA registers location and length. +- interrupts: Should contain one interrupt shared by all channel. +- #dma-cells: must be <1>. Used to represent the number of integer + cells in the dmas property of client device. +- #dma-channels : Number of DMA channels supported. Should be 32. +- clock-names: Should contain the clock of the DMA controller. +- clocks: Should contain a clock specifier for each entry in clock-names. + +Example: + +Controller: +apdma: dma-controller@20100000 { + compatible = "sprd,sc9860-dma"; + reg = <0x20100000 0x4000>; + interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>; + #dma-cells = <1>; + #dma-channels = <32>; + clock-names = "enable"; + clocks = <&clk_ap_ahb_gates 5>; +}; + + +Client: +DMA clients connected to the Spreadtrum DMA controller must use the format +described in the dma.txt file, using a two-cell specifier for each channel. +The two cells in order are: +1. A phandle pointing to the DMA controller. +2. The channel id. + +spi0: spi@70a00000{ + ... + dma-names = "rx_chn", "tx_chn"; + dmas = <&apdma 11>, <&apdma 12>; + ... +}; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next reply other threads:[~2017-08-29 8:52 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-08-29 8:47 Baolin Wang [this message] 2017-08-29 8:47 ` [PATCH v2 1/2] dt-bindings: dma: Add Spreadtrum SC9860 DMA controller Baolin Wang 2017-08-29 8:47 ` [PATCH v2 2/2] dma: sprd: Add Spreadtrum DMA driver Baolin Wang 2017-08-29 8:47 ` Baolin Wang 2017-09-05 4:23 ` Vinod Koul 2017-09-05 4:23 ` Vinod Koul 2017-09-05 11:48 ` Baolin Wang 2017-09-05 11:48 ` Baolin Wang 2017-09-06 16:22 ` Vinod Koul 2017-09-06 16:22 ` Vinod Koul 2017-09-07 2:48 ` Baolin Wang 2017-09-07 2:48 ` Baolin Wang 2017-09-07 3:04 ` Baolin Wang
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