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Diffstat (limited to 'Documentation/devicetree/bindings/reset/nxp,dispmix-mipi-rst.txt')
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diff --git a/Documentation/devicetree/bindings/reset/nxp,dispmix-mipi-rst.txt b/Documentation/devicetree/bindings/reset/nxp,dispmix-mipi-rst.txt new file mode 100644 index 000000000000..c47bfd4842ed --- /dev/null +++ b/Documentation/devicetree/bindings/reset/nxp,dispmix-mipi-rst.txt @@ -0,0 +1,57 @@ +NXP Display Mix mipi-rst Reset Controller +========================================= + +This binding describes a reset controller device that is used to reset +or de-reset the MIPI DPHY master direction(for MIPI DSI) and slave +direction(for MIPI CSI) included by the Display Mix subsystem on IMX8MM +and IMX8MN platforms. Like sft-rstn, only assert and deassert functions +are required for PHY reset or de-reset. + +Please also refer to reset.txt in this directory for common reset +controller binding usage. + +Required properties: +- compatible: Should be "fsl,imx8mm-dispmix-mipi-rst" or + "fsl,imx8mn-dispmix-mipi-rst". +- reg: should be register base and length as documented in the datasheet. +- clocks: phandle and clock specifier to disp apb clock for register access. +- clock-names: should be "disp-apb". +- power-domains: phandle to dispmix power domain. +- reset-cells: 1, see below. + +example: + + dispmix_mipi_rst: dispmix-mipi-rst@32e28008 { + compatible = "fsl,imx8mn-dispmix-mipi-rst"; + reg = <0x0 0x32e28008 0x0 0x4>; + clocks = <&clk IMX8MN_CLK_DISP_APB_ROOT>; + clock-names = "disp-apb"; + active_low; + power-domains = <&dispmix_pd>; + #reset-cells = <1>; + }; + +Specifying mipi-rst control of devices +====================================== + +Device nodes in Display Mix should specify the reset channel required in +their "resets" property, containing a phandle to the mipi-rst device node +and an index to specify which channel to use, as described in +Documentation/devicetree/bindings/reset/reset.txt. + +example: + + mipi_dsi_resets: mipi-dsi-resets { + #address-cells = <1>; + #size-cells = <0>; + #reset-cells = <0>; + + dsi-mipi-reset { + compatible = "dsi,mipi-reset"; + resets = <&dispmix_mipi_rst IMX8MN_MIPI_M_RESET>; + }; + }; + +Macro definitions for the supported reset channels can be found in: +include/dt-bindings/reset/imx8mm-dispmix.h and +include/dt-bindings/reset/imx8mn-dispmix.h. |