From: "alanx.chiang" <alanx.chi...@intel.com>

The AT24 series chips use 8-bit address by default. If some
chips would like to support more than 8 bits, the at24 driver
should be added the compatible field for specfic chips.

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

Signed-off-by: Alan Chiang <alanx.chi...@intel.com>
Signed-off-by: Andy Yeh <andy....@intel.com>
Reviewed-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevche...@intel.com>
Reviewed-by: Rajmohan Mani <rajmohan.m...@intel.com>
---
 Documentation/devicetree/bindings/eeprom/at24.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/eeprom/at24.txt 
b/Documentation/devicetree/bindings/eeprom/at24.txt
index 61d833a..5879259 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 {
@@ -79,4 +81,5 @@ eeprom@52 {
        reg = <0x52>;
        pagesize = <32>;
        wp-gpios = <&gpio1 3 0>;
+       address-width = <16>;
 };
-- 
2.7.4

Reply via email to