linux-kernel - [PATCH v4 03/11] dt-bindings: i2c: dw: Add Baikal-T1 SoC I2C controller

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Message-ID: <20200527120111.5781-4-Sergey.Semin@baikalelectronics.ru>
Date:   Wed, 27 May 2020 15:01:03 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Rob Herring <robh+dt@...nel.org>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        <linux-mips@...r.kernel.org>, <linux-i2c@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v4 03/11] dt-bindings: i2c: dw: Add Baikal-T1 SoC I2C controller

Add the "baikal,bt1-sys-i2c" compatible string to the DW I2C binding. Even
though the corresponding node is supposed to be a child of the Baikal-T1
System Controller, its reg property is left required for compatibility.

Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc: linux-mips@...r.kernel.org

---

Changelog v2:
- Make the reg property being optional if it's Baikal-T1 System I2C DT
  node.

Changelog v3:
- Get back the reg property being mandatory even if it's Baikal-T1 System
  I2C DT node. Rob says it has to be in the DT node if there is a
  dedicated registers range in the System Controller registers space.
---
 Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
index 101d78e8f19d..8c9b3db1b1b8 100644
--- a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
@@ -31,6 +31,8 @@ properties:
         items:
           - const: mscc,ocelot-i2c
           - const: snps,designware-i2c
+      - description: Baikal-T1 SoC System I2C controller
+        const: baikal,bt1-sys-i2c
 
   reg:
     minItems: 1
-- 
2.26.2