[PATCH 1/1] highbank: use the provided dtb by the firmware to probe barebox device and mem size
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Tue Feb 12 16:11:00 EST 2013
the dtb is at 0x1000
if no dtb present use C code device
kepp in C the timer/gpio/uart
Cc: Rob Herring <rob.herring at calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
arch/arm/boards/highbank/env/bin/init_board | 7 +++++
arch/arm/boards/highbank/init.c | 44 ++++++++++++++++++++++++---
2 files changed, 47 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/boards/highbank/env/bin/init_board
diff --git a/arch/arm/boards/highbank/env/bin/init_board b/arch/arm/boards/highbank/env/bin/init_board
new file mode 100644
index 0000000..610db15
--- /dev/null
+++ b/arch/arm/boards/highbank/env/bin/init_board
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ -e /dev/dtb ]
+then
+ oftree -l /dev/dtb
+ oftree -p
+fi
diff --git a/arch/arm/boards/highbank/init.c b/arch/arm/boards/highbank/init.c
index 9fb7986..a01db5b 100644
--- a/arch/arm/boards/highbank/init.c
+++ b/arch/arm/boards/highbank/init.c
@@ -15,20 +15,56 @@
#include <sizes.h>
#include <io.h>
+struct fdt_header *fdt = NULL;
+
static int highbank_mem_init(void)
{
+ struct device_node *np;
+ u32 reg[2];
+ int ret;
+
+ /* load by the firmware at 0x1000 */
+ fdt = IOMEM(0x1000);
+
+ ret = of_unflatten_dtb(fdt);
+ if (ret) {
+ pr_warn("no dtb found at 0x1000 use default configuration\n");
+ fdt = NULL;
+ goto not_found;
+ }
+
+ np = of_find_node_by_path("/memory");
+ if (!np) {
+ pr_warn("no memory node use default configuration\n");
+ goto not_found;
+ }
+
+ ret = of_property_read_u32_array(np, "reg", reg, 2);
+ if (ret) {
+ pr_warn("memory node: no reg property use default configuration\n");
+ goto not_found;
+ }
+
+ pr_info("highbank: dtb probed mem_size = 0x%x\n", reg[1]);
+
+ highbank_add_ddram(reg[1]);
+
+not_found:
//highbank_add_ddram(4089 << 20);
highbank_add_ddram(SZ_1G);
-
return 0;
}
mem_initcall(highbank_mem_init);
static int highbank_devices_init(void)
{
- highbank_register_ahci();
- highbank_register_xgmac(0);
- highbank_register_xgmac(1);
+ if (!fdt) {
+ highbank_register_ahci();
+ highbank_register_xgmac(0);
+ highbank_register_xgmac(1);
+ } else {
+ devfs_add_partition("ram1", 0x1000, SZ_64K, DEVFS_PARTITION_FIXED, "dtb");
+ }
armlinux_set_bootparams((void *)(0x00000100));
--
1.7.10.4
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