Use DT /aliases node to establish a stable phandle to the configuration EEPROM. This permits the configuration EEPROM to be moved e.g. to a different address or a different bus. Adjust the board code to handle new phandle lookup.
Signed-off-by: Marek Vasut marex@denx.de Cc: Patrick Delaunay patrick.delaunay@st.com Cc: Patrice Chotard patrice.chotard@st.com --- arch/arm/dts/stm32mp15xx-dhcom.dtsi | 6 +++++- board/dhelectronics/dh_stm32mp1/board.c | 15 +++++++-------- 2 files changed, 12 insertions(+), 9 deletions(-)
diff --git a/arch/arm/dts/stm32mp15xx-dhcom.dtsi b/arch/arm/dts/stm32mp15xx-dhcom.dtsi index bed69c97b6..e5be0a79ac 100644 --- a/arch/arm/dts/stm32mp15xx-dhcom.dtsi +++ b/arch/arm/dts/stm32mp15xx-dhcom.dtsi @@ -10,6 +10,10 @@ #include <dt-bindings/mfd/st,stpmic1.h>
/ { + aliases { + eeprom0 = &eeprom0; + }; + memory@c0000000 { device_type = "memory"; reg = <0xC0000000 0x40000000>; @@ -187,7 +191,7 @@ }; };
- eeprom@50 { + eeprom0: eeprom@50 { compatible = "atmel,24c02"; reg = <0x50>; pagesize = <16>; diff --git a/board/dhelectronics/dh_stm32mp1/board.c b/board/dhelectronics/dh_stm32mp1/board.c index be55242799..0096046050 100644 --- a/board/dhelectronics/dh_stm32mp1/board.c +++ b/board/dhelectronics/dh_stm32mp1/board.c @@ -78,22 +78,21 @@ DECLARE_GLOBAL_DATA_PTR;
int setup_mac_address(void) { - struct udevice *dev; - ofnode eeprom; unsigned char enetaddr[6]; - int ret; + struct udevice *dev; + int off, ret;
ret = eth_env_get_enetaddr("ethaddr", enetaddr); if (ret) /* ethaddr is already set */ return 0;
- eeprom = ofnode_path("/soc/i2c@5c002000/eeprom@50"); - if (!ofnode_valid(eeprom)) { - printf("Invalid hardware path to EEPROM!\n"); - return -ENODEV; + off = fdt_path_offset(gd->fdt_blob, "eeprom0"); + if (off < 0) { + printf("%s: No eeprom0 path offset\n", __func__); + return off; }
- ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev); + ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev); if (ret) { printf("Cannot find EEPROM!\n"); return ret;