修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra20-mc.txt
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@@ -1,26 +1,37 @@
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 NVIDIA Tegra20 MC(Memory Controller)
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 Required properties:
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-- compatible : "nvidia,tegra20-mc"
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-- reg : Should contain 2 register ranges(address and length); see the
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-  example below. Note that the MC registers are interleaved with the
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-  GART registers, and hence must be represented as multiple ranges.
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+- compatible : "nvidia,tegra20-mc-gart"
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+- reg : Should contain 2 register ranges: physical base address and length of
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+  the controller's registers and the GART aperture respectively.
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+- clocks: Must contain an entry for each entry in clock-names.
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+  See ../clocks/clock-bindings.txt for details.
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+- clock-names: Must include the following entries:
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+  - mc: the module's clock input
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 - interrupts : Should contain MC General interrupt.
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 - #reset-cells : Should be 1. This cell represents memory client module ID.
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   The assignments may be found in header file <dt-bindings/memory/tegra20-mc.h>
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   or in the TRM documentation.
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+- #iommu-cells: Should be 0. This cell represents the number of cells in an
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+  IOMMU specifier needed to encode an address. GART supports only a single
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+  address space that is shared by all devices, therefore no additional
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+  information needed for the address encoding.
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 Example:
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 	mc: memory-controller@7000f000 {
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-		compatible = "nvidia,tegra20-mc";
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-		reg = <0x7000f000 0x024
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-		       0x7000f03c 0x3c4>;
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-		interrupts = <0 77 0x04>;
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+		compatible = "nvidia,tegra20-mc-gart";
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+		reg = <0x7000f000 0x400		/* controller registers */
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+		       0x58000000 0x02000000>;	/* GART aperture */
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+		clocks = <&tegra_car TEGRA20_CLK_MC>;
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+		clock-names = "mc";
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+		interrupts = <GIC_SPI 77 0x04>;
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 		#reset-cells = <1>;
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+		#iommu-cells = <0>;
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 	};
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 	video-codec@6001a000 {
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 		compatible = "nvidia,tegra20-vde";
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 		...
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 		resets = <&mc TEGRA20_MC_RESET_VDE>;
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+		iommus = <&mc>;
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 	};