Describe that efi_install_fdt() defaults to using the device tree indicated by environment variable fdtcontroladdr.

ACPI tables and device trees are mutually exclusive.

Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- cmd/bootefi.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/cmd/bootefi.c b/cmd/bootefi.c index 0b3c5cdb90..c19256e00d 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -196,11 +196,16 @@ static void *get_config_table(const efi_guid_t *guid)

/** * efi_install_fdt() - install fdt passed by a command argument + * + * If fdt_opt is available, the device tree located at that memory address will + * will be installed as configuration table, otherwise the device tree located + * at the address indicated by environment variable fdtcontroladdr will be used. + * + * On architectures (x86) using ACPI tables device trees shall not be installed + * as configuration table. + * * @fdt_opt: pointer to argument * Return: status code - * - * If specified, fdt will be installed as configuration table, - * otherwise no fdt will be passed. */ static efi_status_t efi_install_fdt(const char *fdt_opt) { -- 2.20.1