xref: /freebsd/sys/contrib/device-tree/Bindings/fuse/nvidia,tegra20-fuse.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 fuse block.
2
3Required properties:
4- compatible : For Tegra20, must contain "nvidia,tegra20-efuse".  For Tegra30,
5  must contain "nvidia,tegra30-efuse".  For Tegra114, must contain
6  "nvidia,tegra114-efuse".  For Tegra124, must contain "nvidia,tegra124-efuse".
7  For Tegra132 must contain "nvidia,tegra132-efuse", "nvidia,tegra124-efuse".
8  For Tegra210 must contain "nvidia,tegra210-efuse". For Tegra186 must contain
9  "nvidia,tegra186-efuse". For Tegra194 must contain "nvidia,tegra194-efuse".
10  Details:
11  nvidia,tegra20-efuse: Tegra20 requires using APB DMA to read the fuse data
12	due to a hardware bug. Tegra20 also lacks certain information which is
13	available in later generations such as fab code, lot code, wafer id,..
14  nvidia,tegra30-efuse, nvidia,tegra114-efuse and nvidia,tegra124-efuse:
15	The differences between these SoCs are the size of the efuse array,
16	the location of the spare (OEM programmable) bits and the location of
17	the speedo data.
18- reg: Should contain 1 entry: the entry gives the physical address and length
19       of the fuse registers.
20- clocks: Must contain an entry for each entry in clock-names.
21  See ../clocks/clock-bindings.txt for details.
22- clock-names: Must include the following entries:
23  - fuse
24- resets: Must contain an entry for each entry in reset-names.
25  See ../reset/reset.txt for details.
26- reset-names: Must include the following entries:
27 - fuse
28
29Example:
30
31	fuse@7000f800 {
32		compatible = "nvidia,tegra20-efuse";
33		reg = <0x7000f800 0x400>,
34		      <0x70000000 0x400>;
35		clocks = <&tegra_car TEGRA20_CLK_FUSE>;
36		clock-names = "fuse";
37		resets = <&tegra_car 39>;
38		reset-names = "fuse";
39	};
40
41
42