rockchip: phycore: Add ID page of M24C32-D EEPROM

The Identification Page (32 byte) is an additional page which can be written
and (later) permanently locked in Read-only mode.

phyCORE-RK3288 SoMs are using this page to describe the module variant.
This page also contains a MAC.

Our boards can be equipped with a different amount of EEPROMs. To make
this more transparent let's add an alias for the eeprom which stores the
module variant.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

diff --git a/arch/arm/dts/rk3288-phycore-som.dtsi b/arch/arm/dts/rk3288-phycore-som.dtsi
index fd463f4..02d1196 100644 (file)
--- a/arch/arm/dts/rk3288-phycore-som.dtsi
+++ b/arch/arm/dts/rk3288-phycore-som.dtsi
@@ -61,6 +61,7 @@
        aliases {
                rtc0 = &i2c_rtc;
                rtc1 = &rk818;
+               eeprom0 = &i2c_eeprom_id;
        };
 
        ext_gmac: external-gmac-clock {
@@ -383,6 +384,13 @@
                pagesize = <32>;
        };
 
+       /* M24C32-D Identification page */
+       i2c_eeprom_id: eeprom@58 {
+               compatible = "atmel,24c32";
+               reg = <0x58>;
+               pagesize = <32>;
+       };
+
        vdd_cpu: regulator@60 {
                compatible = "fcs,fan53555";
                reg = <0x60>;