Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 84f47cf4 authored by Hauke Mehrtens's avatar Hauke Mehrtens Committed by Ralf Baechle
Browse files

MIPS: Lantiq: Add support for device tree file from boot loader 



This fetches the device tree file like it is specified in the MIPS UHI
interface if one was found. This is also used when the device tree file
was appended to the kernel image with cat.
This code is copied from arch/mips/bmips/setup.c.

Signed-off-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Acked-by: default avatarJohn Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12898/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 842c1e2c

arch/mips/lantiq/prom.c

+11 −2
Original line number Diff line number Diff line
@@ -65,6 +65,8 @@ static void __init prom_init_cmdline(void) 


void __init plat_mem_setup(void)

{

	void *dtb;



	ioport_resource.start = IOPORT_RESOURCE_START;

	ioport_resource.end = IOPORT_RESOURCE_END;

	iomem_resource.start = IOMEM_RESOURCE_START;
@@ -72,11 +74,18 @@ void __init plat_mem_setup(void) 


	set_io_port_base((unsigned long) KSEG1);



	if (fw_arg0 == -2) /* UHI interface */

		dtb = (void *)fw_arg1;

	else if (__dtb_start != __dtb_end)

		dtb = (void *)__dtb_start;

	else

		panic("no dtb found");



	/*

	 * Load the builtin devicetree. This causes the chosen node to be

	 * Load the devicetree. This causes the chosen node to be

	 * parsed resulting in our memory appearing

	 */

	__dt_setup_arch(__dtb_start);

	__dt_setup_arch(dtb);

}



void __init device_tree_init(void)