mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-27 20:42:27 -04:00
Code Issues Packages Projects Releases Wiki Activity

ARM: dts: microchip: at91-sama7g5ek: add EEPROMs

Browse Source 
The main boot sequence for Microchip AT91 devices is one of the
following:
1/ ROM BOOT -> AT91Bootstrap -> U-Boot -> Linux Kernel
2/ ROM BOOT -> AT91Bootstrap -> Linux Kernel

For case 1/ U-Boot is the stage where the Ethernet MAC addresses are set.
For case 2/ where U-Boot is skipped the Ethernet MAC addresses need to
be configured in Linux. For this add EEPROMs and nvmem-layout to describe
EUI48 MAC address regions.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
[andrei.simion@microchip.com: Add nvmem-layout to describe eui48 mac
 region. Align compatible name with datasheet. Reword commit message.]
Signed-off-by: Andrei Simion <andrei.simion@microchip.com>
[claudiu.beznea: adjusted the new commit message]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Link: https://lore.kernel.org/r/20240703084704.197697-3-andrei.simion@microchip.com
This commit is contained in:
Claudiu Beznea
2024-07-03 11:47:03 +03:00
committed by Claudiu Beznea
parent 8400291e28
commit d0d92d272c
1 changed files with 40 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
arch/arm/boot/dts/microchip/at91-sama7g5ek.dts
View File

@@ -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 {