mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 18:41:03 +00:00
2b950f3aea
On Tegra186, the bootloader which runs before U-Boot passes the Ethernet MAC address to U-Boot using device tree. Extract this value and write it to the environment, so that the Ethernet uclass picks it up and uses it for the built-in Ethernet device. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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* Copyright (c) 2016, NVIDIA CORPORATION.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdt_support.h>
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#include <fdtdec.h>
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#include <asm/arch/tegra.h>
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extern unsigned long nvtboot_boot_x0;
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/*
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* Attempt to use /chosen/nvidia,ether-mac in the nvtboot DTB to U-Boot's
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* ethaddr environment variable if possible.
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*/
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static int set_ethaddr_from_nvtboot(void)
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{
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const void *nvtboot_blob = (void *)nvtboot_boot_x0;
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int ret, node, len;
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const u32 *prop;
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/* Already a valid address in the environment? If so, keep it */
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if (getenv("ethaddr"))
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return 0;
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node = fdt_path_offset(nvtboot_blob, "/chosen");
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if (node < 0) {
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printf("Can't find /chosen node in nvtboot DTB\n");
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return node;
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}
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prop = fdt_getprop(nvtboot_blob, node, "nvidia,ether-mac", &len);
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if (!prop) {
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printf("Can't find nvidia,ether-mac property in nvtboot DTB\n");
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return -ENOENT;
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}
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ret = setenv("ethaddr", (void *)prop);
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if (ret) {
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printf("Failed to set ethaddr from nvtboot DTB: %d\n", ret);
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return ret;
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}
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return 0;
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}
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int tegra_soc_board_init_late(void)
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{
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/* Ignore errors here; not all cases care about Ethernet addresses */
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set_ethaddr_from_nvtboot();
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return 0;
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}
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