dt-bindings: i2c: Rewrite Nomadik I2C bindings in YAML
This rewrites the Nomadik I2C bindings in YAML, some extra tweaks were needed because of the way the original nomadik names the compatible with two compatibles and the DB8500 with three, and the two main variants use a different clock name. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
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Linus Walleij
Wolfram Sang
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f2906aa863
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577584582d
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@ -1,23 +0,0 @@
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I2C for Nomadik based systems
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Required (non-standard) properties:
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- Nil
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Recommended (non-standard) properties:
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- clock-frequency : Maximum bus clock frequency for the device
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Optional (non-standard) properties:
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- Nil
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Example :
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i2c@80004000 {
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compatible = "stericsson,db8500-i2c", "st,nomadik-i2c";
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reg = <0x80004000 0x1000>;
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interrupts = <0 21 0x4>;
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#address-cells = <1>;
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#size-cells = <0>;
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v-i2c-supply = <&db8500_vape_reg>;
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clock-frequency = <400000>;
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};
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@ -0,0 +1,113 @@
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i2c/st,nomadik-i2c.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ST Microelectronics Nomadik I2C Bindings
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description: The Nomadik I2C host controller began its life in the ST
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Microelectronics STn8800 SoC, and was then inherited into STn8810 and
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STn8815. It was part of the prototype STn8500 which then became ST-Ericsson
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DB8500 after the merge of these two companies wireless divisions.
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maintainers:
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- Linus Walleij <linus.walleij@linaro.org>
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allOf:
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- $ref: /schemas/i2c/i2c-controller.yaml#
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# Need a custom select here or 'arm,primecell' will match on lots of nodes
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select:
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properties:
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compatible:
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contains:
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enum:
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- st,nomadik-i2c
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required:
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- compatible
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properties:
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compatible:
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oneOf:
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# The variant found in STn8815
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- items:
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- const: st,nomadik-i2c
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- const: arm,primecell
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# The variant found in DB8500
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- items:
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- const: stericsson,db8500-i2c
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- const: st,nomadik-i2c
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- const: arm,primecell
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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maxItems: 2
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clock-names:
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oneOf:
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# Clock name in STn8815
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- items:
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- const: mclk
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- const: apb_pclk
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# Clock name in DB8500
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- items:
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- const: i2cclk
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- const: apb_pclk
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resets:
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maxItems: 1
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clock-frequency:
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minimum: 1
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maximum: 400000
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/reset/stericsson,db8500-prcc-reset.h>
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#include <dt-bindings/arm/ux500_pm_domains.h>
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i2c@80004000 {
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compatible = "stericsson,db8500-i2c", "st,nomadik-i2c", "arm,primecell";
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reg = <0x80004000 0x1000>;
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interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
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#address-cells = <1>;
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#size-cells = <0>;
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v-i2c-supply = <&db8500_vape_reg>;
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clock-frequency = <400000>;
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clocks = <&prcc_kclk 3 3>, <&prcc_pclk 3 3>;
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clock-names = "i2cclk", "apb_pclk";
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power-domains = <&pm_domains DOMAIN_VAPE>;
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resets = <&prcc_reset DB8500_PRCC_3 DB8500_PRCC_3_RESET_I2C0>;
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};
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i2c@101f8000 {
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compatible = "st,nomadik-i2c", "arm,primecell";
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reg = <0x101f8000 0x1000>;
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interrupt-parent = <&vica>;
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interrupts = <20>;
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clock-frequency = <100000>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&i2c0clk>, <&pclki2c0>;
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clock-names = "mclk", "apb_pclk";
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};
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...
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@ -2416,7 +2416,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git
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F: Documentation/devicetree/bindings/arm/ste-*
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F: Documentation/devicetree/bindings/arm/ux500.yaml
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F: Documentation/devicetree/bindings/arm/ux500/
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F: Documentation/devicetree/bindings/i2c/i2c-nomadik.txt
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F: Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
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F: arch/arm/boot/dts/ste-*
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F: arch/arm/mach-nomadik/
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F: arch/arm/mach-ux500/
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