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@@ -6,12 +6,34 @@ Required properties:
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- interrupts: exactly one interrupt specifier
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- interrupts: exactly one interrupt specifier
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Optional properties:
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Optional properties:
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-- pinctrl: When present, must have one state named "sleep"
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- and one state named "default"
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-- clocks: When present, must refer to exactly one clock named
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+- pinctrl: When present, must have one state named "default",
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+ and may contain a second name named "sleep". The former
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+ state sets up pins for ordinary operation whereas
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+ the latter state will put the associated pins to sleep
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+ when the UART is unused
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+- clocks: When present, the first clock listed must correspond to
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+ the clock named UARTCLK on the IP block, i.e. the clock
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+ to the external serial line, whereas the second clock
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+ must correspond to the PCLK clocking the internal logic
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+ of the block. Just listing one clock (the first one) is
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+ deprecated.
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+- clocks-names: When present, the first clock listed must be named
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+ "uartclk" and the second clock listed must be named
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"apb_pclk"
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"apb_pclk"
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- dmas: When present, may have one or two dma channels.
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- dmas: When present, may have one or two dma channels.
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The first one must be named "rx", the second one
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The first one must be named "rx", the second one
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must be named "tx".
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must be named "tx".
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See also bindings/arm/primecell.txt
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See also bindings/arm/primecell.txt
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+
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+Example:
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+
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+uart@80120000 {
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+ compatible = "arm,pl011", "arm,primecell";
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+ reg = <0x80120000 0x1000>;
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+ interrupts = <0 11 IRQ_TYPE_LEVEL_HIGH>;
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+ dmas = <&dma 13 0 0x2>, <&dma 13 0 0x0>;
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+ dma-names = "rx", "tx";
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+ clocks = <&foo_clk>, <&bar_clk>;
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+ clock-names = "uartclk", "apb_pclk";
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+};
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