diff options
Diffstat (limited to 'Documentation')
4 files changed, 80 insertions, 26 deletions
diff --git a/Documentation/devicetree/bindings/misc/lwn,bk4-spi.yaml b/Documentation/devicetree/bindings/misc/lwn,bk4-spi.yaml new file mode 100644 index 000000000000..73fbf672e22a --- /dev/null +++ b/Documentation/devicetree/bindings/misc/lwn,bk4-spi.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/misc/lwn,bk4-spi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Liebherr's BK4 external SPI controller + +maintainers: + - Lukasz Majewski <lukma@denx.de> + +description: | + Liebherr's BK4 external SPI controller is a device which handles data + acquisition from compatible industrial peripherals. + The SPI is used for data and management purposes in both master and + slave modes. + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + const: lwn,bk4-spi + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 30000000 + + fsl,spi-cs-sck-delay: true + + fsl,spi-sck-cs-delay: true + +required: + - compatible + - spi-max-frequency + +additionalProperties: false + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + spidev@0 { + compatible = "lwn,bk4-spi"; + reg = <0>; + spi-max-frequency = <30000000>; + fsl,spi-cs-sck-delay = <200>; + fsl,spi-sck-cs-delay = <400>; + }; + }; diff --git a/Documentation/devicetree/bindings/misc/lwn-bk4.txt b/Documentation/devicetree/bindings/misc/lwn-bk4.txt deleted file mode 100644 index d6a8c188c087..000000000000 --- a/Documentation/devicetree/bindings/misc/lwn-bk4.txt +++ /dev/null @@ -1,26 +0,0 @@ -* Liebherr's BK4 controller external SPI - -A device which handles data acquisition from compatible industrial -peripherals. -The SPI is used for data and management purposes in both master and -slave modes. - -Required properties: - -- compatible : Should be "lwn,bk4" - -Required SPI properties: - -- reg : Should be address of the device chip select within - the controller. - -- spi-max-frequency : Maximum SPI clocking speed of device in Hz, should be - 30MHz at most for the Liebherr's BK4 external bus. - -Example: - -spidev0: spi@0 { - compatible = "lwn,bk4"; - spi-max-frequency = <30000000>; - reg = <0>; -}; diff --git a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml index d48ecd6cd5ad..b6bc71d19286 100644 --- a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml +++ b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml @@ -68,6 +68,7 @@ properties: - items: - enum: - amd,pensando-elba-qspi + - amd,versal2-ospi - intel,lgm-qspi - intel,socfpga-qspi - mobileye,eyeq5-ospi diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml index 093150c0cb87..82d051f7bd6e 100644 --- a/Documentation/devicetree/bindings/spi/spi-controller.yaml +++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml @@ -69,6 +69,11 @@ properties: Should be generally avoided and be replaced by spi-cs-high + ACTIVE_HIGH. + The simplest way to obtain an active-high CS signal is to configure the + controller's cs-gpio property with the ACTIVE_HIGH flag and set the + peripheral's spi-cs-high property. See example below for a better + understanding. + fifo-depth: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -189,3 +194,23 @@ examples: stacked-memories = /bits/ 64 <0x10000000 0x10000000>; }; }; + + - | + #include <dt-bindings/gpio/gpio.h> + + spi@20204000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "brcm,bcm2835-spi"; + reg = <0x7e204000 0x1000>; + interrupts = <2 22>; + clocks = <&clk_spi>; + cs-gpios = <&gpio 8 GPIO_ACTIVE_HIGH>; + + display@0 { + compatible = "lg,lg4573"; + spi-max-frequency = <1000000>; + reg = <0>; + spi-cs-high; + }; + }; |