linux-kernel - [PATCH v2 1/1] dt-bindings: i2c: dw: cancel mandatory requirements for "#address-cells" and "#size-cells"

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Message-ID: <20201214124347.2120-2-thunder.leizhen@huawei.com>
Date:   Mon, 14 Dec 2020 20:43:47 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Wolfram Sang <wsa@...nel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH v2 1/1] dt-bindings: i2c: dw: cancel mandatory requirements for "#address-cells" and "#size-cells"

The "#address-cells" and "#size-cells" are required only when the I2C
controller has subnodes. However, some I2C controllers defined in
"arch/arm64/boot/dts/amd/" and "arch/arm64/boot/dts/hisilicon/"
directories do not have child nodes. So they don't need these two
properties and don't write them explicitly.

Therefore, setting properties "#address-cells" and "#size-cells" as
"required" in this yaml file causes the following warnings:
/root/linux-next/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dt.yaml: \
i2c@...00000: '#address-cells' is a required property
/root/linux-next/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dt.yaml: \
i2c@...00000: '#size-cells' is a required property

Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
index 4f746bef23742e9..c22b66b6219eaa3 100644
--- a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
@@ -101,8 +101,6 @@ unevaluatedProperties: false
 required:
   - compatible
   - reg
-  - "#address-cells"
-  - "#size-cells"
   - interrupts
 
 examples:
@@ -110,8 +108,6 @@ examples:
     i2c@...00 {
       compatible = "snps,designware-i2c";
       reg = <0xf0000 0x1000>;
-      #address-cells = <1>;
-      #size-cells = <0>;
       interrupts = <11>;
       clock-frequency = <400000>;
     };
@@ -119,8 +115,6 @@ examples:
     i2c@...0000 {
       compatible = "snps,designware-i2c";
       reg = <0x1120000 0x1000>;
-      #address-cells = <1>;
-      #size-cells = <0>;
       interrupts = <12 1>;
       clock-frequency = <400000>;
       i2c-sda-hold-time-ns = <300>;
@@ -148,8 +142,6 @@ examples:
       reg = <0x100400 0x100>, <0x198 0x8>;
       pinctrl-0 = <&i2c_pins>;
       pinctrl-names = "default";
-      #address-cells = <1>;
-      #size-cells = <0>;
       interrupts = <8>;
       clocks = <&ahb_clk>;
     };
-- 
1.8.3