diff options
| author | Rich Felker <dalias@libc.org> | 2016-03-26 01:24:30 +0000 |
|---|---|---|
| committer | Rich Felker <dalias@libc.org> | 2016-07-31 03:33:32 +0000 |
| commit | 190fe191cfbead9fe089453dd092869c9469c6d4 (patch) | |
| tree | 10dfa2b780644c5fe43b3cf53901ac4a04963384 /arch/sh | |
| parent | ff18143ceed3424b7d6cdb8659b9692fa734f0d8 (diff) | |
sh: add support for linking a builtin device tree blob in the kernel
Signed-off-by: Rich Felker <dalias@libc.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/Kconfig | 20 | ||||
| -rw-r--r-- | arch/sh/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/boards/of-generic.c | 15 | ||||
| -rw-r--r-- | arch/sh/boot/dts/Makefile | 3 | ||||
| -rw-r--r-- | arch/sh/kernel/setup.c | 4 |
5 files changed, 41 insertions, 3 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 0d5f3a9bb315..ceeda5c1a70a 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -739,6 +739,26 @@ endmenu menu "Boot options" +config USE_BUILTIN_DTB + bool "Use builtin DTB" + default n + depends on SH_DEVICE_TREE + help + Link a device tree blob for particular hardware into the kernel, + suppressing use of the DTB pointer provided by the bootloader. + This option should only be used with legacy bootloaders that are + not capable of providing a DTB to the kernel, or for experimental + hardware without stable device tree bindings. + +config BUILTIN_DTB_SOURCE + string "Source file for builtin DTB" + default "" + depends on USE_BUILTIN_DTB + help + Base name (without suffix, relative to arch/sh/boot/dts) for the + a DTS file that will be used to produce the DTB linked into the + kernel. + config ZERO_PAGE_OFFSET hex default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ diff --git a/arch/sh/Makefile b/arch/sh/Makefile index bf5b3f5f4962..3b2c8b4827d0 100644 --- a/arch/sh/Makefile +++ b/arch/sh/Makefile @@ -130,6 +130,8 @@ head-y := arch/sh/kernel/head_$(BITS).o core-y += arch/sh/kernel/ arch/sh/mm/ arch/sh/boards/ core-$(CONFIG_SH_FPU_EMU) += arch/sh/math-emu/ +core-$(CONFIG_USE_BUILTIN_DTB) += arch/sh/boot/dts/ + # Mach groups machdir-$(CONFIG_SOLUTION_ENGINE) += mach-se machdir-$(CONFIG_SH_HP6XX) += mach-hp6xx diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c index 911ffb9f115b..1fb6d5714bae 100644 --- a/arch/sh/boards/of-generic.c +++ b/arch/sh/boards/of-generic.c @@ -124,13 +124,22 @@ static void __init sh_of_time_init(void) static void __init sh_of_setup(char **cmdline_p) { + struct device_node *root; + +#ifdef CONFIG_USE_BUILTIN_DTB + unflatten_and_copy_device_tree(); +#else unflatten_device_tree(); +#endif board_time_init = sh_of_time_init; - sh_mv.mv_name = of_flat_dt_get_machine_name(); - if (!sh_mv.mv_name) - sh_mv.mv_name = "Unknown SH model"; + sh_mv.mv_name = "Unknown SH model"; + root = of_find_node_by_path("/"); + if (root) { + of_property_read_string(root, "model", &sh_mv.mv_name); + of_node_put(root); + } sh_of_smp_probe(); } diff --git a/arch/sh/boot/dts/Makefile b/arch/sh/boot/dts/Makefile new file mode 100644 index 000000000000..e5ce3a0de7f4 --- /dev/null +++ b/arch/sh/boot/dts/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_USE_BUILTIN_DTB) += $(patsubst "%",%,$(CONFIG_BUILTIN_DTB_SOURCE)).dtb.o + +clean-files := *.dtb.S diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 5d34605b58b5..5b9eb70311e3 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -251,7 +251,11 @@ void __ref sh_fdt_init(phys_addr_t dt_phys) /* Avoid calling an __init function on secondary cpus. */ if (done) return; +#ifdef CONFIG_USE_BUILTIN_DTB + dt_virt = __dtb_start; +#else dt_virt = phys_to_virt(dt_phys); +#endif if (!dt_virt || !early_init_dt_scan(dt_virt)) { pr_crit("Error: invalid device tree blob" |