[PATCH 4/7] dt-bindings: spi: add binding file for NXP FlexSPI driver
From: robh@kernel.org (Rob Herring)
Date: 2018-09-04 01:33:25
Also in:
linux-devicetree, linux-spi
On Fri, Aug 31, 2018 at 04:00:01PM +0530, Yogesh Gaur wrote:
Add binding file for NXP FlexSPI driver.
Bindings are for h/w, not drivers.
quoted hunk ↗ jump to hunk
Signed-off-by: Yogesh Gaur <redacted> --- .../devicetree/bindings/spi/spi-nxp-fspi.txt | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-fspi.txtdiff --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..9f07116 --- /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: iconfiguration 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: + +fspi0: flexspi at 20c0000 {
spi at ...
+ 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";
+
+ flash0: mt35xu512aba at 0 {flash at 0
+ reg = <0>;
+ ....
+ };
+
+ flash1: mt35xu512aba at 1 {flash at 1 Make sure to fix the dts patch too.
+ reg = <1>; + .... + }; +}; -- 2.7.4