[PATCH 1/1] highbank: use the provided dtb by the firmware to probe barebox device and mem size

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>]

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@xxxxxxxxxxx>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
 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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