58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
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.
|