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NXP Display Mix sft-rstn Reset Controller
=========================================
This binding describes a reset controller device that is used to reset
or de-reset all the submodules(such as, LCDIF, MIPI DSI, MIPI CSI, ISI
and etc) included by the Display Mix subsystem on IMX8MM and IMX8MN
platforms. Only assert and deassert functions are required for submodule
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-sft-rstn" or
"fsl,imx8mn-dispmix-sft-rstn".
- 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_sft_rstn: dispmix-sft-rstn@32e28000 {
compatible = "fsl,imx8mm-dispmix-sft-rstn";
reg = <0x0 0x32e28000 0x0 0x4>;
clocks = <&clk IMX8MM_CLK_DISP_APB_ROOT>;
clock-names = "disp-apb";
active_low;
power-domains = <&dispmix_pd>;
#reset-cells = <1>;
};
Specifying sft-rstn control of devices
======================================
Device nodes in Display Mix should specify the reset channel required in
their "resets" property, containing a phandle to the sft-rstn device node
and an index to specify which channel to use, as described in
Documentation/devicetree/bindings/reset/reset.txt.
example:
lcdif_resets: lcdif-resets {
#address-cells = <1>;
#size-cells = <0>;
#reset-cells = <0>;
lcdif-soft-resetn {
compatible = "lcdif,soft-resetn";
resets = <&dispmix_sft_rstn IMX8MN_LCDIF_APB_CLK_RESET>,
<&dispmix_sft_rstn IMX8MN_LCDIF_PIXEL_CLK_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.
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