40 lines
1.2 KiB
Plaintext
40 lines
1.2 KiB
Plaintext
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STM32 - STM32MP1- HDP Pin configuration for STM32MP1
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=======================================================
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The Hardware Debug Port (HDP) allows the observation of internal signals. By using multiplexers,
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up to 16 signals for each of 8-bit output can be observed.
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Required Properties:
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- compatible: Must be "st,stm32mp1-hdp"
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- muxing-hdp: Indicates for each HDP pins selected which HDP output among the 16 available signals you want
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For each HDP pins you can select one of 16 signals which will be described in file : include/dt-bindings/soc/stm32-hdp.h
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Example
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-------
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In common dtsi file:
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hdp: hdp@5002a000 {
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compatible = "st,stm32mp1-hdp";
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reg = <0x5002a000 0x400>;
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clocks = <&rcc HDP>;
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clock-names = "hdp";
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};
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In board-specific file:
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In this example I've selected HDP0, HDP6 and HDP7, and for HDP0 the output signal is HDP0_GPOVAL_0,
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for HDP6 is HDP6_GPOVAL_6, and for HDP7 is HDP7_GPOVAL_7.
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&hdp {
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pinctrl-names = "default", "sleep";
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pinctrl-0 = <&hdp0_pins_a &hdp6_pins_a &hdp7_pins_a>;
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pinctrl-1 = <&hdp0_pins_sleep_a &hdp6_pins_sleep_a &hdp7_pins_sleep_a>;
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muxing-hdp = <(STM32_HDP(0, HDP0_GPOVAL_0) |
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STM32_HDP(6, HDP6_GPOVAL_6) |
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STM32_HDP(7, HDP7_GPOVAL_7))>;
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};
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