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Diffstat (limited to 'dts/Bindings/clock/nvidia,tegra20-car.yaml')
-rw-r--r-- | dts/Bindings/clock/nvidia,tegra20-car.yaml | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/dts/Bindings/clock/nvidia,tegra20-car.yaml b/dts/Bindings/clock/nvidia,tegra20-car.yaml new file mode 100644 index 0000000000..459d2a5253 --- /dev/null +++ b/dts/Bindings/clock/nvidia,tegra20-car.yaml @@ -0,0 +1,69 @@ +# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/nvidia,tegra20-car.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra Clock and Reset Controller + +maintainers: + - Jon Hunter <jonathanh@nvidia.com> + - Thierry Reding <thierry.reding@gmail.com> + +description: | + The Clock and Reset (CAR) is the HW module responsible for muxing and gating + Tegra's clocks, and setting their rates. It comprises CLKGEN and RSTGEN units. + + CLKGEN provides the registers to program the PLLs. It controls most of + the clock source programming and most of the clock dividers. + + CLKGEN input signals include the external clock for the reference frequency + (12 MHz, 26 MHz) and the external clock for the Real Time Clock (32.768 KHz). + + Outputs from CLKGEN are inputs clock of the h/w blocks in the Tegra system. + + RSTGEN provides the registers needed to control resetting of each block in + the Tegra system. + +properties: + compatible: + enum: + - nvidia,tegra20-car + - nvidia,tegra30-car + - nvidia,tegra114-car + - nvidia,tegra210-car + + reg: + maxItems: 1 + + '#clock-cells': + const: 1 + + "#reset-cells": + const: 1 + +required: + - compatible + - reg + - '#clock-cells' + - "#reset-cells" + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/tegra20-car.h> + + car: clock-controller@60006000 { + compatible = "nvidia,tegra20-car"; + reg = <0x60006000 0x1000>; + #clock-cells = <1>; + #reset-cells = <1>; + }; + + usb-controller@c5004000 { + compatible = "nvidia,tegra20-ehci"; + reg = <0xc5004000 0x4000>; + clocks = <&car TEGRA20_CLK_USB2>; + resets = <&car TEGRA20_CLK_USB2>; + }; |