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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/arm/primecell.txt')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/arm/primecell.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/arm/primecell.txt b/kernel/Documentation/devicetree/bindings/arm/primecell.txt new file mode 100644 index 000000000..0df6acacf --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/arm/primecell.txt @@ -0,0 +1,46 @@ +* ARM Primecell Peripherals + +ARM, Ltd. Primecell peripherals have a standard id register that can be used to +identify the peripheral type, vendor, and revision. This value can be used for +driver matching. + +Required properties: + +- compatible : should be a specific name for the peripheral and + "arm,primecell". The specific name will match the ARM + engineering name for the logic block in the form: "arm,pl???" + +Optional properties: + +- arm,primecell-periphid : Value to override the h/w value with +- clocks : From common clock binding. First clock is phandle to clock for apb + pclk. Additional clocks are optional and specific to those peripherals. +- clock-names : From common clock binding. Shall be "apb_pclk" for first clock. +- dmas : From common DMA binding. If present, refers to one or more dma channels. +- dma-names : From common DMA binding, needs to match the 'dmas' property. + Devices with exactly one receive and transmit channel shall name + these "rx" and "tx", respectively. +- pinctrl-<n> : Pinctrl states as described in bindings/pinctrl/pinctrl-bindings.txt +- pinctrl-names : Names corresponding to the numbered pinctrl states +- interrupts : one or more interrupt specifiers +- interrupt-names : names corresponding to the interrupts properties + +Example: + +serial@fff36000 { + compatible = "arm,pl011", "arm,primecell"; + arm,primecell-periphid = <0x00341011>; + + clocks = <&pclk>; + clock-names = "apb_pclk"; + + dmas = <&dma-controller 4>, <&dma-controller 5>; + dma-names = "rx", "tx"; + + pinctrl-0 = <&uart0_default_mux>, <&uart0_default_mode>; + pinctrl-1 = <&uart0_sleep_mode>; + pinctrl-names = "default","sleep"; + + interrupts = <0 11 0x4>; +}; + |