36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
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Tegra SoC Tachometer controller
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Required properties:
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- compatible: For Tegra186, must contain "nvidia,pwm-tegra186-tachometer".
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- reg: physical base address and length of the controller's registers
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- #pwm-cells: should be 2. See pwm.txt in this directory for a description of
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the cells format.
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- clocks: Must contain one entry, for the module clock.
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See ../clocks/clock-bindings.txt for details.
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Must have the clock name as "tach".
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- resets: Must contain an entry for each entry in reset-names.
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See ../reset/reset.txt for details.
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- reset-names: Must include the following entries:
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- tach
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- pulse-per-rev: Pulse per revolutions. This is based on the Fan property.
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- capture-window-length: Window length for capturing PWM signal.
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Optional properties:
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- enable-dynamic-clock-gating: Enable dynamic clock gating. Once register read,
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clock is disabled.
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Example:
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tachometer@39c0000 {
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compatible = "nvidia,pwm-tegra186-tachometer";
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reg = <0x0 0x039c0000 0x0 0x10>;
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clocks = <&tegra_car TEGRA186_CLK_TACH>;
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clock-names = "tach";
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resets = <&tegra_car TEGRA186_RESET_TACH>;
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reset-names = "tach";
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pulse-per-rev = <2>;
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capture-window-length = <2>;
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#pwm-cells = <2>;
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};
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