diff options
| -rw-r--r-- | Documentation/devicetree/bindings/dma/qcom,adm.yaml | 96 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/dma/qcom_adm.txt | 61 |
2 files changed, 96 insertions, 61 deletions
diff --git a/Documentation/devicetree/bindings/dma/qcom,adm.yaml b/Documentation/devicetree/bindings/dma/qcom,adm.yaml new file mode 100644 index 000000000000..6c08245bf5d5 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom,adm.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/qcom,adm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm ADM DMA Controller + +maintainers: + - Christian Marangi <[email protected]> + - Bjorn Andersson <[email protected]> + +description: | + QCOM ADM DMA controller provides DMA capabilities for + peripheral buses such as NAND and SPI. + +properties: + compatible: + const: qcom,adm + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + "#dma-cells": + const: 1 + + clocks: + items: + - description: phandle to the core clock + - description: phandle to the iface clock + + clock-names: + items: + - const: core + - const: iface + + resets: + items: + - description: phandle to the clk reset + - description: phandle to the c0 reset + - description: phandle to the c1 reset + - description: phandle to the c2 reset + + reset-names: + items: + - const: clk + - const: c0 + - const: c1 + - const: c2 + + qcom,ee: + $ref: /schemas/types.yaml#/definitions/uint32 + description: indicates the security domain identifier used in the secure world. + minimum: 0 + maximum: 255 + +required: + - compatible + - reg + - interrupts + - "#dma-cells" + - clocks + - clock-names + - resets + - reset-names + - qcom,ee + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/qcom,gcc-ipq806x.h> + #include <dt-bindings/reset/qcom,gcc-ipq806x.h> + + adm_dma: dma-controller@18300000 { + compatible = "qcom,adm"; + reg = <0x18300000 0x100000>; + interrupts = <0 170 0>; + #dma-cells = <1>; + + clocks = <&gcc ADM0_CLK>, + <&gcc ADM0_PBUS_CLK>; + clock-names = "core", "iface"; + + resets = <&gcc ADM0_RESET>, + <&gcc ADM0_C0_RESET>, + <&gcc ADM0_C1_RESET>, + <&gcc ADM0_C2_RESET>; + reset-names = "clk", "c0", "c1", "c2"; + qcom,ee = <0>; + }; + +... diff --git a/Documentation/devicetree/bindings/dma/qcom_adm.txt b/Documentation/devicetree/bindings/dma/qcom_adm.txt deleted file mode 100644 index 9d3b2f917b7b..000000000000 --- a/Documentation/devicetree/bindings/dma/qcom_adm.txt +++ /dev/null @@ -1,61 +0,0 @@ -QCOM ADM DMA Controller - -Required properties: -- compatible: must contain "qcom,adm" for IPQ/APQ8064 and MSM8960 -- reg: Address range for DMA registers -- interrupts: Should contain one interrupt shared by all channels -- #dma-cells: must be <2>. First cell denotes the channel number. Second cell - denotes CRCI (client rate control interface) flow control assignment. -- clocks: Should contain the core clock and interface clock. -- clock-names: Must contain "core" for the core clock and "iface" for the - interface clock. -- resets: Must contain an entry for each entry in reset names. -- reset-names: Must include the following entries: - - clk - - c0 - - c1 - - c2 -- qcom,ee: indicates the security domain identifier used in the secure world. - -Example: - adm_dma: dma@18300000 { - compatible = "qcom,adm"; - reg = <0x18300000 0x100000>; - interrupts = <0 170 0>; - #dma-cells = <2>; - - clocks = <&gcc ADM0_CLK>, <&gcc ADM0_PBUS_CLK>; - clock-names = "core", "iface"; - - resets = <&gcc ADM0_RESET>, - <&gcc ADM0_C0_RESET>, - <&gcc ADM0_C1_RESET>, - <&gcc ADM0_C2_RESET>; - reset-names = "clk", "c0", "c1", "c2"; - qcom,ee = <0>; - }; - -DMA clients must use the format descripted in the dma.txt file, using a three -cell specifier for each channel. - -Each dmas request consists of 3 cells: - 1. phandle pointing to the DMA controller - 2. channel number - 3. CRCI assignment, if applicable. If no CRCI flow control is required, use 0. - The CRCI is used for flow control. It identifies the peripheral device that - is the source/destination for the transferred data. - -Example: - - spi4: spi@1a280000 { - spi-max-frequency = <50000000>; - - pinctrl-0 = <&spi_pins>; - pinctrl-names = "default"; - - cs-gpios = <&qcom_pinmux 20 0>; - - dmas = <&adm_dma 6 9>, - <&adm_dma 5 10>; - dma-names = "rx", "tx"; - }; |