[U-Boot] [PATCH v2] arm64: zynqmp: Create fdtfile from compatible string
Alexander Graf
agraf at suse.de
Thu Feb 14 12:58:46 UTC 2019
On 14.02.19 13:56, Michal Simek wrote:
> distro boot expects that fdtfile name is setup for alternative DTB.
> Create this file based on the first platform compatible string.
> This should ensure that one rootfs can store multiple DTBs for different
> boards.
> Reflect structure which is used in Linux kernel. It means dtbs are
> strored in xilinx folder.
>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
Reviewed-by: Alexander Graf <agraf at suse.de>
Alex
> ---
>
> Changes in v2:
> - Use xilinx folder.
> - Update commit message
>
> board/xilinx/zynqmp/zynqmp.c | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
> index a49f2f3e9ebe..0ac9b46b5f4b 100644
> --- a/board/xilinx/zynqmp/zynqmp.c
> +++ b/board/xilinx/zynqmp/zynqmp.c
> @@ -514,6 +514,36 @@ static u32 reset_reason(void)
> return ret;
> }
>
> +static int set_fdtfile(void)
> +{
> + char *compatible, *fdtfile;
> + const char *suffix = ".dtb";
> + const char *vendor = "xilinx/";
> +
> + if (env_get("fdtfile"))
> + return 0;
> +
> + compatible = (char *)fdt_getprop(gd->fdt_blob, 0, "compatible", NULL);
> + if (compatible) {
> + debug("Compatible: %s\n", compatible);
> +
> + /* Discard vendor prefix */
> + strsep(&compatible, ",");
> +
> + fdtfile = calloc(1, strlen(vendor) + strlen(compatible) +
> + strlen(suffix) + 1);
> + if (!fdtfile)
> + return -ENOMEM;
> +
> + sprintf(fdtfile, "%s%s%s", vendor, compatible, suffix);
> +
> + env_set("fdtfile", fdtfile);
> + free(fdtfile);
> + }
> +
> + return 0;
> +}
> +
> int board_late_init(void)
> {
> u32 reg = 0;
> @@ -536,6 +566,10 @@ int board_late_init(void)
> return 0;
> }
>
> + ret = set_fdtfile();
> + if (ret)
> + return ret;
> +
> ret = zynqmp_mmio_read((ulong)&crlapb_base->boot_mode, ®);
> if (ret)
> return -EINVAL;
>
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