linux-kernel - [PATCH v2 1/2] dt-bindings: at24: Add address-width property

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Date:   Tue, 26 Jun 2018 14:22:07 +0800
From:   alanx.chiang@...el.com
To:     linux-i2c@...r.kernel.org
Cc:     andy.yeh@...el.com, sakari.ailus@...ux.intel.com,
        andriy.shevchenko@...el.com, rajmohan.mani@...el.com,
        andy.shevchenko@...il.com, brgl@...ev.pl, robh+dt@...nel.org,
        mark.rutland@....com, arnd@...db.de, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org,
        "alanx.chiang" <alanx.chiang@...el.com>
Subject: [PATCH v2 1/2] dt-bindings: at24: Add address-width property

From: "alanx.chiang" <alanx.chiang@...el.com>

The AT24 series chips use 8-bit address by default. If some
chips would like to support more than 8 bits, should add the compatible
field for specfic chips in the driver.

Provide a flexible way to determine the addressing bits through
address-width in this patch.

Signed-off-by: Alan Chiang <alanx.chiang@...el.com>
Signed-off-by: Andy Yeh <andy.yeh@...el.com>

---
since v1:
-- Remove the address-width field in the example.

---
 Documentation/devicetree/bindings/eeprom/at24.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/eeprom/at24.txt b/Documentation/devicetree/bindings/eeprom/at24.txt
index 61d833a..9467482 100644
--- a/Documentation/devicetree/bindings/eeprom/at24.txt
+++ b/Documentation/devicetree/bindings/eeprom/at24.txt
@@ -72,6 +72,8 @@ Optional properties:
 
   - wp-gpios: GPIO to which the write-protect pin of the chip is connected.
 
+  - address-width : number of address bits (one of 8, 16).
+
 Example:
 
 eeprom@52 {
-- 
2.7.4