From 1a7422ebd092342fa1f4d420eb4642b0134f36ca Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Mon, 15 Jul 2019 18:07:51 +0100 Subject: [PATCH] rpi4: Add stdout-path to device tree Some device tree users like to find a pointer to the standard serial console in the device tree, in the "stdout-path" property of the /chosen node. Add the location of the Mini UART in that property, so that DT users are happy, for instance Linux' earlycon detection. Change-Id: I178e55016e5640de5ab0bc6e061944bd3583ea96 Signed-off-by: Andre Przywara --- plat/rpi/rpi4/rpi4_bl31_setup.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/plat/rpi/rpi4/rpi4_bl31_setup.c b/plat/rpi/rpi4/rpi4_bl31_setup.c index 39aa3e45d..53ab0c2e2 100644 --- a/plat/rpi/rpi4/rpi4_bl31_setup.c +++ b/plat/rpi/rpi4/rpi4_bl31_setup.c @@ -255,6 +255,9 @@ static void rpi4_prepare_dtb(void) gic_int_prop[2] = cpu_to_fdt32(0x0f04); // all cores, level high fdt_setprop(dtb, offs, "interrupts", gic_int_prop, 12); + offs = fdt_path_offset(dtb, "/chosen"); + fdt_setprop_string(dtb, offs, "stdout-path", "serial0"); + ret = fdt_pack(dtb); if (ret < 0) ERROR("Failed to pack Device Tree at %p: error %d\n", dtb, ret);