diff options
| author | Paul Burton | 2015-05-24 16:11:42 +0100 |
|---|---|---|
| committer | Ralf Baechle | 2015-06-21 21:53:22 +0200 |
| commit | 6ec127fb3c7754d3dc6614e9744386fbe652927f (patch) | |
| tree | a8b9195f3351f800cba73611e2b7da148f8d490d /arch | |
| parent | 1237496af309bc0551949418fb06f63d3b1f45b5 (diff) | |
MIPS: JZ4740: only detect RAM size if not specified in DT
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 Ingenic SoCs where the memory controller register
layout differs.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10163/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/jz4740/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/jz4740/setup.c | 8 |
3 files changed, 10 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index eb70c2d0a6a9..d5acb9e96d59 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -302,6 +302,7 @@ config MACH_INGENIC 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 7636432af6ee..70a9578cc6db 100644 --- a/arch/mips/jz4740/Makefile +++ b/arch/mips/jz4740/Makefile @@ -7,6 +7,8 @@ obj-y += prom.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 8c08d7dcda66..1bed3cb062b3 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) |