Add binding file for NXP FlexSPI controller
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@xxxxxxx>
---
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@20c0000 {
+ 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
