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Subject[PATCH v5 1/2] dt-bindings: spi: Qualcomm Quad SPI(QSPI) documentation
Date
From: Girish Mahadevan <girishm@codeaurora.org>

Bindings for Qualcomm Quad SPI used on SoCs such as sdm845.

Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>
Signed-off-by: Ryan Case <ryandcase@chromium.org>
---

Changes in v5:
- None

Changes in v4:
- Changed qspi@ to spi@ and device@ to flash@ to match Rob's review

Changes in v3:
- Added generic compatible string in addition to specific SoC

Changes in v2:
- Added commit text
- Removed invalid property
- Updated example to match sdm845 with attached spi-nor

.../bindings/spi/qcom,spi-qcom-qspi.txt | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/qcom,spi-qcom-qspi.txt

diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-qcom-qspi.txt b/Documentation/devicetree/bindings/spi/qcom,spi-qcom-qspi.txt
new file mode 100644
index 000000000000..1d64b61f5171
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/qcom,spi-qcom-qspi.txt
@@ -0,0 +1,36 @@
+Qualcomm Quad Serial Peripheral Interface (QSPI)
+
+The QSPI controller allows SPI protocol communication in single, dual, or quad
+wire transmission modes for read/write access to slaves such as NOR flash.
+
+Required properties:
+- compatible: An SoC specific identifier followed by "qcom,qspi-v1", such as
+ "qcom,sdm845-qspi", "qcom,qspi-v1"
+- reg: Should contain the base register location and length.
+- interrupts: Interrupt number used by the controller.
+- clocks: Should contain the core and AHB clock.
+- clock-names: Should be "core" for core clock and "iface" for AHB clock.
+
+SPI slave nodes must be children of the SPI master node and can contain
+properties described in Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Example:
+
+ qspi: spi@88df000 {
+ compatible = "qcom,sdm845-qspi", "qcom,qspi-v1";
+ reg = <0x88df000 0x600>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
+ clock-names = "iface", "core";
+ clocks = <&gcc GCC_QSPI_CNOC_PERIPH_AHB_CLK>,
+ <&gcc GCC_QSPI_CORE_CLK>;
+
+ flash@0 {
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <25000000>;
+ spi-tx-bus-width = <2>;
+ spi-rx-bus-width = <2>;
+ };
+ };
--
2.19.0.605.g01d371f741-goog
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