diff options
| author | Alban Bedel <albeu@free.fr> | 2015-05-31 01:52:25 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-06-21 21:54:01 +0200 |
| commit | 03c8c407a8c9ba1772ea7c086b7a0f7bceecdb65 (patch) | |
| tree | e71058925bc6d52bf7ae682b371e7e1d501681b4 | |
| parent | fe41b466f9f4c45b3368dee4a50d7c77ae7f37f9 (diff) | |
MIPS: ath79: Add basic device tree support
Add the bare minimum to load a device tree.
Signed-off-by: Alban Bedel <albeu@free.fr>
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/ath79/machtypes.h | 1 | ||||
| -rw-r--r-- | arch/mips/ath79/setup.c | 27 |
3 files changed, 28 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 733f6ac97f28..164d8c73552f 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -134,6 +134,7 @@ config ATH79 select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_MIPS16 select SYS_SUPPORTS_ZBOOT + select USE_OF help Support for the Atheros AR71XX/AR724X/AR913X SoCs. diff --git a/arch/mips/ath79/machtypes.h b/arch/mips/ath79/machtypes.h index 26254058c545..a13db3d15c8f 100644 --- a/arch/mips/ath79/machtypes.h +++ b/arch/mips/ath79/machtypes.h @@ -15,6 +15,7 @@ #include <asm/mips_machine.h> enum ath79_mach_type { + ATH79_MACH_GENERIC_OF = -1, /* Device tree board */ ATH79_MACH_GENERIC = 0, ATH79_MACH_AP121, /* Atheros AP121 reference board */ ATH79_MACH_AP136_010, /* Atheros AP136-010 reference board */ diff --git a/arch/mips/ath79/setup.c b/arch/mips/ath79/setup.c index 74f1af7eeefc..01a644f174dd 100644 --- a/arch/mips/ath79/setup.c +++ b/arch/mips/ath79/setup.c @@ -17,12 +17,16 @@ #include <linux/bootmem.h> #include <linux/err.h> #include <linux/clk.h> +#include <linux/of_platform.h> +#include <linux/of_fdt.h> #include <asm/bootinfo.h> #include <asm/idle.h> #include <asm/time.h> /* for mips_hpt_frequency */ #include <asm/reboot.h> /* for _machine_{restart,halt} */ #include <asm/mips_machine.h> +#include <asm/prom.h> +#include <asm/fw/fw.h> #include <asm/mach-ath79/ath79.h> #include <asm/mach-ath79/ar71xx_regs.h> @@ -194,8 +198,19 @@ unsigned int get_c0_compare_int(void) void __init plat_mem_setup(void) { + unsigned long fdt_start; + set_io_port_base(KSEG1); + /* Get the position of the FDT passed by the bootloader */ + fdt_start = fw_getenvl("fdt_start"); + if (fdt_start) + __dt_setup_arch((void *)KSEG0ADDR(fdt_start)); +#ifdef CONFIG_BUILTIN_DTB + else + __dt_setup_arch(__dtb_start); +#endif + ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE, AR71XX_RESET_SIZE); ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE, @@ -203,7 +218,8 @@ void __init plat_mem_setup(void) ath79_ddr_ctrl_init(); ath79_detect_sys_type(); - detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX); + if (mips_machtype != ATH79_MACH_GENERIC_OF) + detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX); _machine_restart = ath79_restart; _machine_halt = ath79_halt; @@ -235,6 +251,10 @@ void __init plat_time_init(void) static int __init ath79_setup(void) { + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); + if (mips_machtype == ATH79_MACH_GENERIC_OF) + return 0; + ath79_gpio_init(); ath79_register_uart(); ath79_register_wdt(); @@ -246,6 +266,11 @@ static int __init ath79_setup(void) arch_initcall(ath79_setup); +void __init device_tree_init(void) +{ + unflatten_and_copy_device_tree(); +} + static void __init ath79_generic_init(void) { /* Nothing to do */ |