[PATCH v2 3/5] dt-bindings: Add documentation for GM20B GPU

Alexandre Courbot
2016-03-15T02:58:42Z

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

Signed-off-by: Alexandre Courbot <acourbot-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
.../devicetree/bindings/gpu/nvidia,gk20a.txt | 27 ++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
index 1e3748337319..d9ad6b87fbbc 100644
--- a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
+++ b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
@@ -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:
@@ -27,7 +31,7 @@ Required properties:
Optional properties:
- iommus: A reference to the IOMMU. See ../iommu/iommu.txt for details.

-Example:
+Example for GK20A:

gpu@0,57000000 {
compatible = "nvidia,gk20a";
@@ -45,3 +49,22 @@ Example:
iommus = <&mc TEGRA_SWGROUP_GPU>;
status = "disabled";
};
+
+Example for GM20B:
+
+ gpu@0,57000000 {
+ 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";
+ };
--
2.7.2