From patchwork Tue Mar 31 00:48:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 244626 List-Id: U-Boot discussion From: marex at denx.de (Marek Vasut) Date: Tue, 31 Mar 2020 02:48:44 +0200 Subject: [PATCH V2 07/14] ARM: dts: stm32: Use DT alias for the configuration EEPROM In-Reply-To: <20200331004851.282583-1-marex@denx.de> References: <20200331004851.282583-1-marex@denx.de> Message-ID: <20200331004851.282583-8-marex@denx.de> 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 Cc: Patrick Delaunay Cc: Patrice Chotard Reviewed-by: Patrice Chotard Reviewed-by: Patrick Delaunay --- V2: No change --- 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 / { + aliases { + eeprom0 = &eeprom0; + }; + memory at c0000000 { device_type = "memory"; reg = <0xC0000000 0x40000000>; @@ -187,7 +191,7 @@ }; }; - eeprom at 50 { + eeprom0: eeprom at 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 109d9ec935..a3458a2623 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 at 5c002000/eeprom at 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;