From: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
Our main boot sequence is
(1) ROM BOOT -> AT91Bootstrap -> U-Boot -> Linux Kernel.
U-Boot is the stage where we set up the MAC address.
Also we can skip U-Boot and use the following boot sequence :
(2) ROM BOOT -> AT91Boostrap -> Linux Kernel.
Add EEPROMs and nvmem-layout to describe eui48 MAC address region
to be used for case (2).
Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
[andrei.simion@xxxxxxxxxxxxx: Add nvmem-layout to describe eui48 mac region.
Align compatible name with datasheet. Reword commit message.]
Signed-off-by: Andrei Simion <andrei.simion@xxxxxxxxxxxxx>
---
v3 -> v4:
- reword commit message
- change commit title
v2 -> v3:
- change from atmel,24mac02e4 to microchip,24aa025e48 to align with datasheet
- drop co-developed-by to maintain the chronological order of the changes
v1 -> v2:
- remove unnecessary #address-cells #size-cells
---
.../arm/boot/dts/microchip/at91-sama7g5ek.dts | 40 +++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/arch/arm/boot/dts/microchip/at91-sama7g5ek.dts b/arch/arm/boot/dts/microchip/at91-sama7g5ek.dts
index 20b2497657ae..40f4480e298b 100644
--- a/arch/arm/boot/dts/microchip/at91-sama7g5ek.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama7g5ek.dts
@@ -403,6 +403,42 @@ i2c8: i2c@600 {
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
status = "okay";
+
+ eeprom0: eeprom@52 {
+ compatible = "microchip,24aa025e48";
+ reg = <0x52>;
+ size = <256>;
+ pagesize = <16>;
+ vcc-supply = <&vdd_3v3>;
+
+ nvmem-layout {
+ compatible = "fixed-layout";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ eeprom0_eui48: eui48@fa {
+ reg = <0xfa 0x6>;
+ };
+ };
+ };
+
+ eeprom1: eeprom@53 {
+ compatible = "microchip,24aa025e48";
+ reg = <0x53>;
+ size = <256>;
+ pagesize = <16>;
+ vcc-supply = <&vdd_3v3>;
+
+ nvmem-layout {
+ compatible = "fixed-layout";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ eeprom1_eui48: eui48@fa {
+ reg = <0xfa 0x6>;
+ };
+ };
+ };
};
};
@@ -440,6 +476,8 @@ &pinctrl_gmac0_mdio_default
&pinctrl_gmac0_txck_default
&pinctrl_gmac0_phy_irq>;
phy-mode = "rgmii-id";
+ nvmem-cells = <&eeprom0_eui48>;
+ nvmem-cell-names = "mac-address";
status = "okay";
ethernet-phy@7 {
@@ -457,6 +495,8 @@ &gmac1 {
&pinctrl_gmac1_mdio_default
&pinctrl_gmac1_phy_irq>;
phy-mode = "rmii";
+ nvmem-cells = <&eeprom1_eui48>;
+ nvmem-cell-names = "mac-address";
status = "okay"; /* Conflict with pdmc0. */
ethernet-phy@0 {
--
2.34.1
