This patch adds YAML based device tree binding document for Tegra
Quad SPI driver.
Signed-off-by: Sowjanya Komatineni
---
.../bindings/spi/nvidia,tegra210-quad.yaml | 117 +
1 file changed, 117 insertions(+)
create mode 100644
Documentation/devicetree/bindings/spi/nvidia,tegra210-quad.yaml
diff --git a/Documentation/devicetree/bindings/spi/nvidia,tegra210-quad.yaml
b/Documentation/devicetree/bindings/spi/nvidia,tegra210-quad.yaml
new file mode 100644
index 000..35a8045
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/nvidia,tegra210-quad.yaml
@@ -0,0 +1,117 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/nvidia,tegra210-quad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Tegra Quad SPI Controller
+
+maintainers:
+ - Thierry Reding
+ - Jonathan Hunter
+
+allOf:
+ - $ref: "spi-controller.yaml#"
+
+properties:
+ compatible:
+enum:
+ - nvidia,tegra210-qspi
+ - nvidia,tegra186-qspi
+ - nvidia,tegra194-qspi
+
+ reg:
+maxItems: 1
+
+ interrupts:
+maxItems: 1
+
+ clock-names:
+items:
+ - const: qspi
+ - const: qspi_out
+
+ clocks:
+maxItems: 2
+
+ resets:
+maxItems: 1
+
+ dmas:
+maxItems: 2
+
+ dma-names:
+items:
+ - const: rx
+ - const: tx
+
+patternProperties:
+ "@[0-9a-f]+":
+type: object
+
+properties:
+ spi-rx-bus-width:
+enum: [1, 2, 4]
+
+ spi-tx-bus-width:
+enum: [1, 2, 4]
+
+ nvidia,tx-clk-tap-delay:
+description:
+ Delays the clock going out to device with this tap value.
+ Tap value varies based on platform design trace lengths from Tegra
+ QSPI to corresponding slave device.
+$ref: /schemas/types.yaml#/definitions/uint32
+minimum: 0
+maximum: 31
+
+ nvidia,rx-clk-tap-delay:
+description:
+ Delays the clock coming in from the device with this tap value.
+ Tap value varies based on platform design trace lengths from Tegra
+ QSPI to corresponding slave device.
+$ref: /schemas/types.yaml#/definitions/uint32
+minimum: 0
+maximum: 255
+
+required:
+ - reg
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clock-names
+ - clocks
+ - resets
+
+unevaluatedProperties: false
+
+examples:
+ - |
+#include
+#include
+#include
+spi@7041 {
+compatible = "nvidia,tegra210-qspi";
+reg = <0x7041 0x1000>;
+interrupts = ;
+#address-cells = <1>;
+#size-cells = <0>;
+clocks = <_car TEGRA210_CLK_QSPI>,
+ <_car TEGRA210_CLK_QSPI_PM>;
+clock-names = "qspi", "qspi_out";
+resets = <_car 211>;
+dmas = < 5>, < 5>;
+dma-names = "rx", "tx";
+
+flash@0 {
+compatible = "spi-nor";
+reg = <0>;
+spi-max-frequency = <10400>;
+spi-tx-bus-width = <2>;
+spi-rx-bus-width = <2>;
+nvidia,tx-clk-tap-delay = <0>;
+nvidia,rx-clk-tap-delay = <0>;
+};
+};
--
2.7.4
