dt-bindings: at24: add the 'num-addresses' property

Currently the at24 driver only creates additional i2c dummies for
atmel,24c00 and it's hard-coded. Some other chips (like for example
Microchip's 24AA02T) also take more slave addresses despite being
otherwise compatible with already supported variants.

Add a new property to the device tree binding document that defines
the total number of i2c slave addresses taken by the device. The
addresses are counted starting from the one in the reg property.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/Documentation/devicetree/bindings/eeprom/at24.txt b/Documentation/devicetree/bindings/eeprom/at24.txt
index f9a7c984274ce739c392a3af08c0775199d6e32e..0e456bbc121399b73a22c4b4745a61bf7a38794d 100644 (file)
--- a/Documentation/devicetree/bindings/eeprom/at24.txt
+++ b/Documentation/devicetree/bindings/eeprom/at24.txt
@@ -75,6 +75,8 @@ Optional properties:
 
   - address-width: number of address bits (one of 8, 16).
 
+  - num-addresses: total number of i2c slave addresses this device takes
+
 Example:
 
 eeprom@52 {
@@ -82,4 +84,5 @@ eeprom@52 {
        reg = <0x52>;
        pagesize = <32>;
        wp-gpios = <&gpio1 3 0>;
+       num-addresses = <8>;
 };