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Message-ID: <20240201225022.144476-1-afd@ti.com>
Date: Thu, 1 Feb 2024 16:50:19 -0600
From: Andrew Davis <afd@...com>
To: Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
Tero
Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof
Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley
<conor+dt@...nel.org>
CC: <linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, Andrew Davis <afd@...com>
Subject: [PATCH v3 1/4] dt-bindings: spi: Convert spi-davinci.txt to YAML
Convert spi-davinci.txt to ti,dm6441-spi.yaml.
Signed-off-by: Andrew Davis <afd@...com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
Changes for v3:
- Add tags and rebase
Changes for v2:
- Fix typo s/dm6446/dm6441
.../devicetree/bindings/spi/spi-davinci.txt | 100 ------------------
.../bindings/spi/ti,dm6441-spi.yaml | 76 +++++++++++++
2 files changed, 76 insertions(+), 100 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/spi/spi-davinci.txt
create mode 100644 Documentation/devicetree/bindings/spi/ti,dm6441-spi.yaml
diff --git a/Documentation/devicetree/bindings/spi/spi-davinci.txt b/Documentation/devicetree/bindings/spi/spi-davinci.txt
deleted file mode 100644
index f012888656eca..0000000000000
--- a/Documentation/devicetree/bindings/spi/spi-davinci.txt
+++ /dev/null
@@ -1,100 +0,0 @@
-Davinci SPI controller device bindings
-
-Links on DM:
-Keystone 2 - https://www.ti.com/lit/ug/sprugp2a/sprugp2a.pdf
-dm644x - https://www.ti.com/lit/ug/sprue32a/sprue32a.pdf
-OMAP-L138/da830 - http://www.ti.com/lit/ug/spruh77a/spruh77a.pdf
-
-Required properties:
-- #address-cells: number of cells required to define a chip select
- address on the SPI bus. Should be set to 1.
-- #size-cells: should be zero.
-- compatible:
- - "ti,dm6441-spi" for SPI used similar to that on DM644x SoC family
- - "ti,da830-spi" for SPI used similar to that on DA8xx SoC family
- - "ti,keystone-spi" for SPI used similar to that on Keystone2 SoC
- family
-- reg: Offset and length of SPI controller register space
-- num-cs: Number of chip selects. This includes internal as well as
- GPIO chip selects.
-- ti,davinci-spi-intr-line: interrupt line used to connect the SPI
- IP to the interrupt controller within the SoC. Possible values
- are 0 and 1. Manual says one of the two possible interrupt
- lines can be tied to the interrupt controller. Set this
- based on a specific SoC configuration.
-- interrupts: interrupt number mapped to CPU.
-- clocks: spi clk phandle
- For 66AK2G this property should be set per binding,
- Documentation/devicetree/bindings/clock/ti,sci-clk.yaml
-
-SoC-specific Required Properties:
-
-The following are mandatory properties for Keystone 2 66AK2G SoCs only:
-
-- power-domains: Should contain a phandle to a PM domain provider node
- and an args specifier containing the SPI device id
- value. This property is as per the binding,
-
-Optional:
-- cs-gpios: gpio chip selects
- For example to have 3 internal CS and 2 GPIO CS, user could define
- cs-gpios = <0>, <0>, <0>, <&gpio1 30 0>, <&gpio1 31 0>;
- where first three are internal CS and last two are GPIO CS.
-
-Optional properties for slave devices:
-SPI slave nodes can contain the following properties.
-Not all SPI Peripherals from Texas Instruments support this.
-Please check SPI peripheral documentation for a device before using these.
-
-- ti,spi-wdelay : delay between transmission of words
- (SPIFMTn.WDELAY, SPIDAT1.WDEL) must be specified in number of SPI module
- clock periods.
-
- delay = WDELAY * SPI_module_clock_period + 2 * SPI_module_clock_period
-
-Below is timing diagram which shows functional meaning of
-"ti,spi-wdelay" parameter.
-
- +-+ +-+ +-+ +-+ +-+ +-+ +-+ +-+
-SPI_CLK | | | | | | | | | | | | | | | |
- +----------+ +-+ +-+ +-+ +-+ +---------------------------+ +-+ +-+ +-
-
-SPI_SOMI/SIMO+-----------------+ +-----------
- +----------+ word1 +---------------------------+word2
- +-----------------+ +-----------
- WDELAY
- <-------------------------->
-
-Example of a NOR flash slave device (n25q032) connected to DaVinci
-SPI controller device over the SPI bus.
-
-spi0:spi@...f0000 {
- #address-cells = <1>;
- #size-cells = <0>;
- compatible = "ti,dm6446-spi";
- reg = <0x20BF0000 0x1000>;
- num-cs = <4>;
- ti,davinci-spi-intr-line = <0>;
- interrupts = <338>;
- clocks = <&clkspi>;
-
- flash: flash@0 {
- #address-cells = <1>;
- #size-cells = <1>;
- compatible = "st,m25p32";
- spi-max-frequency = <25000000>;
- reg = <0>;
- ti,spi-wdelay = <8>;
-
- partition@0 {
- label = "u-boot-spl";
- reg = <0x0 0x80000>;
- read-only;
- };
-
- partition@1 {
- label = "test";
- reg = <0x80000 0x380000>;
- };
- };
-};
diff --git a/Documentation/devicetree/bindings/spi/ti,dm6441-spi.yaml b/Documentation/devicetree/bindings/spi/ti,dm6441-spi.yaml
new file mode 100644
index 0000000000000..a71e51fb87e4f
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/ti,dm6441-spi.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/ti,dm6441-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Davinci SPI Controller
+
+description:
+ SPI controllers on TI Davinci, OMAP-L138, and Keystone2 SoCs.
+
+maintainers:
+ - Andrew Davis <afd@...com>
+
+allOf:
+ - $ref: spi-controller.yaml#
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - ti,dm6441-spi # for SPI used on DM644x SoC family
+ - ti,da830-spi # for SPI used on DA8xx SoC family
+ - ti,keystone-spi # for SPI used on Keystone2 SoC family
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clock-names:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+ ti,davinci-spi-intr-line:
+ description:
+ Interrupt line used to connect the SPI IP to the interrupt controller
+ within the SoC. Possible values are 0 and 1. Manual says one of the
+ two possible interrupt lines can be tied to the interrupt controller.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1]
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ spi@...f0000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,dm6441-spi";
+ reg = <0x20bf0000 0x1000>;
+ interrupts = <338>;
+ clocks = <&clkspi>;
+
+ num-cs = <4>;
+ ti,davinci-spi-intr-line = <0>;
+
+ flash@0 {
+ compatible = "st,m25p32";
+ spi-max-frequency = <50000000>;
+ reg = <0>;
+ ti,spi-wdelay = <8>;
+ };
+ };
--
2.39.2
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