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-NVIDIA Tegra114 SPI controller.
-
-Required properties:
-- compatible : For Tegra114, must contain "nvidia,tegra114-spi".
- Otherwise, must contain '"nvidia,<chip>-spi", "nvidia,tegra114-spi"' where
- <chip> is tegra124, tegra132, or tegra210.
-- reg: Should contain SPI registers location and length.
-- interrupts: Should contain SPI interrupts.
-- clock-names : Must include the following entries:
- - spi
-- resets : Must contain an entry for each entry in reset-names.
- See ../reset/reset.txt for details.
-- reset-names : Must include the following entries:
- - spi
-- dmas : Must contain an entry for each entry in clock-names.
- See ../dma/dma.txt for details.
-- dma-names : Must include the following entries:
- - rx
- - tx
-- clocks : Must contain an entry for each entry in clock-names.
- See ../clocks/clock-bindings.txt for details.
-
-Recommended properties:
-- spi-max-frequency: Definition as per
- Documentation/devicetree/bindings/spi/spi-bus.txt
-Optional properties:
-- nvidia,tx-clk-tap-delay: Delays the clock going out to the external device
- with this tap value. This property is used to tune the outgoing data from
- Tegra SPI master with respect to outgoing Tegra SPI master clock.
- Tap values vary based on the platform design trace lengths from Tegra SPI
- to corresponding slave devices. Valid tap values are from 0 thru 63.
-- nvidia,rx-clk-tap-delay: Delays the clock coming in from the external device
- with this tap value. This property is used to adjust the Tegra SPI master
- clock with respect to the data from the SPI slave device.
- Tap values vary based on the platform design trace lengths from Tegra SPI
- to corresponding slave devices. Valid tap values are from 0 thru 63.
-
-Example:
-
-spi@7000d600 {
- compatible = "nvidia,tegra114-spi";
- reg = <0x7000d600 0x200>;
- interrupts = <0 82 0x04>;
- spi-max-frequency = <25000000>;
- #address-cells = <1>;
- #size-cells = <0>;
- clocks = <&tegra_car 44>;
- clock-names = "spi";
- resets = <&tegra_car 44>;
- reset-names = "spi";
- dmas = <&apbdma 16>, <&apbdma 16>;
- dma-names = "rx", "tx";
- <spi-client>@<bus_num> {
- ...
- ...
- nvidia,rx-clk-tap-delay = <0>;
- nvidia,tx-clk-tap-delay = <16>;
- ...
- };
-
-};