diff options
Diffstat (limited to 'kernel/Documentation/devicetree/bindings/fuse')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt b/kernel/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt new file mode 100644 index 000000000..23e1d3194 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt @@ -0,0 +1,40 @@ +NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 fuse block. + +Required properties: +- compatible : For Tegra20, must contain "nvidia,tegra20-efuse". For Tegra30, + must contain "nvidia,tegra30-efuse". For Tegra114, must contain + "nvidia,tegra114-efuse". For Tegra124, must contain "nvidia,tegra124-efuse". + Otherwise, must contain "nvidia,<chip>-efuse", plus one of the above, where + <chip> is tegra132. + Details: + nvidia,tegra20-efuse: Tegra20 requires using APB DMA to read the fuse data + due to a hardware bug. Tegra20 also lacks certain information which is + available in later generations such as fab code, lot code, wafer id,.. + nvidia,tegra30-efuse, nvidia,tegra114-efuse and nvidia,tegra124-efuse: + The differences between these SoCs are the size of the efuse array, + the location of the spare (OEM programmable) bits and the location of + the speedo data. +- reg: Should contain 1 entry: the entry gives the physical address and length + of the fuse registers. +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - fuse +- resets: Must contain an entry for each entry in reset-names. + See ../reset/reset.txt for details. +- reset-names: Must include the following entries: + - fuse + +Example: + + fuse@7000f800 { + compatible = "nvidia,tegra20-efuse"; + reg = <0x7000F800 0x400>, + <0x70000000 0x400>; + clocks = <&tegra_car TEGRA20_CLK_FUSE>; + clock-names = "fuse"; + resets = <&tegra_car 39>; + reset-names = "fuse"; + }; + + |