path: root/arch/arm/mach-davinci/dm644x.c
diff options
authorMark A. Greer <mgreer@mvista.com>2009-04-15 12:38:58 -0700
committerKevin Hilman <khilman@deeprootsystems.com>2009-05-26 08:14:04 -0700
commit79c3c0b729647a6246c120408f36e6804dab244e (patch)
tree5662bf481043b99b13951aaafd44d45a7903fa8b /arch/arm/mach-davinci/dm644x.c
parentac7b75b5bbbfd60b752869a22daa3be99b5b4f99 (diff)
davinci: Encapsulate SoC-specific data in a structure
Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/dm644x.c')
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 0419d571bdc..79f113698b0 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -13,6 +13,8 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
+#include <asm/mach/map.h>
#include <mach/dm644x.h>
#include <mach/clock.h>
#include <mach/cputype.h>
@@ -20,6 +22,7 @@
#include <mach/irqs.h>
#include <mach/psc.h>
#include <mach/mux.h>
+#include <mach/common.h>
#include "clock.h"
#include "mux.h"
@@ -463,8 +466,23 @@ void dm644x_init_emac(struct emac_platform_data *unused) {}
+static struct map_desc dm644x_io_desc[] = {
+ {
+ .virtual = IO_VIRT,
+ .pfn = __phys_to_pfn(IO_PHYS),
+ .length = IO_SIZE,
+ .type = MT_DEVICE
+ },
+static struct davinci_soc_info davinci_soc_info_dm644x = {
+ .io_desc = dm644x_io_desc,
+ .io_desc_num = ARRAY_SIZE(dm644x_io_desc),
void __init dm644x_init(void)
+ davinci_common_init(&davinci_soc_info_dm644x);
davinci_mux_register(dm644x_pins, ARRAY_SIZE(dm644x_pins));