diff options
Diffstat (limited to 'target/linux/lantiq/patches-4.4/0120-MIPS-lantiq-add-support-for-device-tree-file-from-bo.patch')
| -rw-r--r-- | target/linux/lantiq/patches-4.4/0120-MIPS-lantiq-add-support-for-device-tree-file-from-bo.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-4.4/0120-MIPS-lantiq-add-support-for-device-tree-file-from-bo.patch b/target/linux/lantiq/patches-4.4/0120-MIPS-lantiq-add-support-for-device-tree-file-from-bo.patch new file mode 100644 index 0000000..3c6fa23 --- /dev/null +++ b/target/linux/lantiq/patches-4.4/0120-MIPS-lantiq-add-support-for-device-tree-file-from-bo.patch @@ -0,0 +1,48 @@ +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) |