linux-kernel - [PATCH v2 2/5] dt-bindings: spi: add binding file for NXP FlexSPI controller

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Message-Id: <1537177710-9379-3-git-send-email-yogeshnarayan.gaur@nxp.com>
Date:   Mon, 17 Sep 2018 15:18:27 +0530
From:   Yogesh Gaur <yogeshnarayan.gaur@....com>
To:     linux-mtd@...ts.infradead.org, boris.brezillon@...tlin.com,
        marek.vasut@...il.com, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     robh@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        linux-arm-kernel@...ts.infradead.org, computersforpeace@...il.com,
        frieder.schrempf@...eet.de, linux-kernel@...r.kernel.org,
        Yogesh Gaur <yogeshnarayan.gaur@....com>
Subject: [PATCH v2 2/5] dt-bindings: spi: add binding file for NXP FlexSPI controller

Add binding file for NXP FlexSPI controller

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@....com>
---
Changes for v2:
- Incorporated Rob review comments.

 .../devicetree/bindings/spi/spi-nxp-fspi.txt       | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt

diff --git a/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
new file mode 100644
index 0000000..94b5203
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
@@ -0,0 +1,42 @@
+* NXP Flex Serial Peripheral Interface (FSPI)
+
+Required properties:
+  - compatible : Should be "nxp,lx2160a-fspi"
+  - reg :        First contains the register location and length,
+                 Second contains the memory mapping address and length
+  - reg-names :  Should contain the resource reg names:
+                 - fspi_base: configuration register address space
+                 - fspi_mmap: memory mapped address space
+  - interrupts : Should contain the interrupt for the device
+
+Optional properties:
+  - big-endian : See common-properties.txt.
+
+Required SPI slave node properties:
+  - reg :        There are two buses (A and B) with two chip selects each.
+                 This encodes to which bus and CS the flash is connected:
+                 - <0>: Bus A, CS 0
+                 - <1>: Bus A, CS 1
+                 - <2>: Bus B, CS 0
+                 - <3>: Bus B, CS 1
+
+Example showing the usage of two SPI NOR slave devices on bus A:
+
+fspi@0: flexspi@...0000 {
+	compatible = "nxp,lx2160a-fspi";
+	reg = <0x0 0x20c0000 0x0 0x10000>, <0x0 0x20000000 0x0 0x10000000>;
+	reg-names = "fspi_base", "fspi_mmap";
+	interrupts = <0 25 0x4>; /* Level high type */
+	clocks = <&clockgen 4 3>, <&clockgen 4 3>;
+	clock-names = "fspi_en", "fspi";
+
+	flash@0: mt35xu512aba@0 {
+		reg = <0>;
+		....
+	};
+
+	flash@1: mt35xu512aba@1 {
+		reg = <1>;
+		....
+	};
+};
-- 
2.7.4