From: Paul Burton <[email protected]> Allow a devicetree to specify the memory present in the system rather than probing it from the memory controller. This both saves the probing for systems where the amount of memory is fixed, and will simplify the bringup of later jz47xx series SoCs where the memory controller register layout differs.
Signed-off-by: Paul Burton <[email protected]> Cc: Lars-Peter Clausen <[email protected]> --- arch/mips/Kconfig | 1 + arch/mips/jz4740/Makefile | 2 ++ arch/mips/jz4740/setup.c | 8 +++++++- 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 8b377a7..ef82cd3 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -290,6 +290,7 @@ config MACH_JZ4740 select GENERIC_IRQ_CHIP select BUILTIN_DTB select USE_OF + select LIBFDT config LANTIQ bool "Lantiq based platforms" diff --git a/arch/mips/jz4740/Makefile b/arch/mips/jz4740/Makefile index 61168a2..340dc16 100644 --- a/arch/mips/jz4740/Makefile +++ b/arch/mips/jz4740/Makefile @@ -7,6 +7,8 @@ obj-y += prom.o irq.o time.o reset.o setup.o \ gpio.o platform.o timer.o serial.o +CFLAGS_setup.o = -I$(src)/../../../scripts/dtc/libfdt + # board specific support obj-$(CONFIG_JZ4740_QI_LB60) += board-qi_lb60.o diff --git a/arch/mips/jz4740/setup.c b/arch/mips/jz4740/setup.c index 8c08d7d..1bed3cb 100644 --- a/arch/mips/jz4740/setup.c +++ b/arch/mips/jz4740/setup.c @@ -18,6 +18,7 @@ #include <linux/io.h> #include <linux/irqchip.h> #include <linux/kernel.h> +#include <linux/libfdt.h> #include <linux/of_fdt.h> #include <linux/of_platform.h> @@ -55,9 +56,14 @@ static void __init jz4740_detect_mem(void) void __init plat_mem_setup(void) { + int offset; + jz4740_reset_init(); - jz4740_detect_mem(); __dt_setup_arch(__dtb_start); + + offset = fdt_path_offset(__dtb_start, "/memory"); + if (offset < 0) + jz4740_detect_mem(); } void __init device_tree_init(void) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
