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- From a32285ed4ba970b868b7fb49b716d776f4410ef6 Mon Sep 17 00:00:00 2001
- From: Hauke Mehrtens <hauke@hauke-m.de>
- Date: Sat, 19 Mar 2016 16:52:46 +0100
- Subject: [PATCH] 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: Hauke Mehrtens <hauke@hauke-m.de>
- ---
- arch/mips/lantiq/prom.c | 13 +++++++++++--
- 1 file changed, 11 insertions(+), 2 deletions(-)
- --- a/arch/mips/lantiq/prom.c
- +++ b/arch/mips/lantiq/prom.c
- @@ -65,6 +65,8 @@ static void __init prom_init_cmdline(voi
-
- 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)
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