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authorYogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>2019-01-15 13:00:20 +0100
committerMark Brown <broonie@kernel.org>2019-01-28 13:28:12 +0100
commitcdbbb8ec5a8078630b777e0b56e3b39c1e7cd76a (patch)
treea6f1de4a455fb63ee295355a55cefd16f24b0654 /Documentation/devicetree/bindings/spi
parentspi: spi-mem: Add driver for NXP FlexSPI controller (diff)
downloadlinux-cdbbb8ec5a8078630b777e0b56e3b39c1e7cd76a.tar.xz
linux-cdbbb8ec5a8078630b777e0b56e3b39c1e7cd76a.zip
dt-bindings: spi: add binding file for NXP FlexSPI controller
Add binding file for NXP FlexSPI controller Signed-off-by: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/spi')
-rw-r--r--Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt39
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
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+++ b/Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
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+* 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
+
+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: spi@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";
+
+ mt35xu512aba0: flash@0 {
+ reg = <0>;
+ ....
+ };
+
+ mt35xu512aba1: flash@1 {
+ reg = <1>;
+ ....
+ };
+};