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dt-bindings: Add documentation for GM20B GPU 

GM20B's definition is mostly similar to GK20A's, but requires an
additional clock.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Alexandre Courbot 2016-03-28 18:23:02 +09:00 committed by Thierry Reding
parent 375d244702
commit 53cafb93da
1 changed files with 26 additions and 3 deletions
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29
Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
View File

@ -1,9 +1,10 @@
NVIDIA GK20A Graphics Processing Unit
NVIDIA Tegra Graphics Processing Units
Required properties:
- compatible: "nvidia,<gpu>"
Currently recognized values:
- nvidia,gk20a
- nvidia,gm20b
- reg: Physical base address and length of the controller's registers.
Must contain two entries:
- first entry for bar0
@ -19,6 +20,9 @@ Required properties:
- clock-names: Must include the following entries:
- gpu
- pwr
If the compatible string is "nvidia,gm20b", then the following clock
is also required:
- ref
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
@ -27,9 +31,9 @@ Required properties:
Optional properties:
- iommus: A reference to the IOMMU. See ../iommu/iommu.txt for details.
Example:
Example for GK20A:
gpu@0,57000000 {
gpu@57000000 {
compatible = "nvidia,gk20a";
reg = <0x0 0x57000000 0x0 0x01000000>,
<0x0 0x58000000 0x0 0x01000000>;
@ -45,3 +49,22 @@ Example:
iommus = <&mc TEGRA_SWGROUP_GPU>;
status = "disabled";
};
Example for GM20B:
gpu@57000000 {
compatible = "nvidia,gm20b";
reg = <0x0 0x57000000 0x0 0x01000000>,
<0x0 0x58000000 0x0 0x01000000>;
interrupts = <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "stall", "nonstall";
clocks = <&tegra_car TEGRA210_CLK_GPU>,
<&tegra_car TEGRA210_CLK_PLL_P_OUT5>,
<&tegra_car TEGRA210_CLK_PLL_G_REF>;
clock-names = "gpu", "pwr", "ref";
resets = <&tegra_car 184>;
reset-names = "gpu";
iommus = <&mc TEGRA_SWGROUP_GPU>;
status = "disabled";
};