[U-Boot-Users] [PATCH] Enable the IceCube/lite5200 variants to pass a device tree to Linux.

[Grant Likely]

This patch adds the code and configuration necessary to boot with an
arch/powerpc Linux kernel.

Signed-off-by: Grant Likely <grant.likely at gmail.com>
---
 board/icecube/icecube.c   |   12 ++++++++++++
 cpu/mpc5xxx/cpu.c         |   28 ++++++++++++++++++++++++++++
 include/configs/IceCube.h |   13 +++++++++++++
 3 files changed, 53 insertions(+), 0 deletions(-)

diff --git a/board/icecube/icecube.c b/board/icecube/icecube.c
index 4f056b2..9b222da 100644
--- a/board/icecube/icecube.c
+++ b/board/icecube/icecube.c
@@ -29,6 +29,10 @@ #include <mpc5xxx.h>
 #include <pci.h>
 #include <asm/processor.h>
 
+#if defined(CONFIG_OF_FLAT_TREE)
+#include <ft_build.h>
+#endif
+
 #if defined(CONFIG_LITE5200B)
 #include "mt46v32m16.h"
 #else
@@ -334,3 +338,11 @@ void ide_set_reset (int idereset)
 	}
 }
 #endif /* defined (CFG_CMD_IDE) && defined (CONFIG_IDE_RESET) */
+
+#if defined(CONFIG_OF_FLAT_TREE) && defined(CONFIG_OF_BOARD_SETUP)
+void
+ft_board_setup(void *blob, bd_t *bd)
+{
+	ft_cpu_setup(blob, bd);
+}
+#endif
diff --git a/cpu/mpc5xxx/cpu.c b/cpu/mpc5xxx/cpu.c
index 6b6f828..20e6735 100644
--- a/cpu/mpc5xxx/cpu.c
+++ b/cpu/mpc5xxx/cpu.c
@@ -31,6 +31,10 @@ #include <command.h>
 #include <mpc5xxx.h>
 #include <asm/processor.h>
 
+#if defined(CONFIG_OF_FLAT_TREE)
+#include <ft_build.h>
+#endif
+
 DECLARE_GLOBAL_DATA_PTR;
 
 int checkcpu (void)
@@ -102,3 +106,27 @@ unsigned long get_tbclk (void)
 }
 
 /* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_OF_FLAT_TREE
+void
+ft_cpu_setup(void *blob, bd_t *bd)
+{
+	u32 *p;
+	ulong clock;
+	int len;
+
+	clock = bd->bi_busfreq;
+	p = ft_get_prop(blob, "/cpus/" OF_CPU "/bus-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(clock);
+
+	p = ft_get_prop(blob, "/" OF_SOC "/bus-frequency", &len);
+	if (p != NULL)
+		*p = cpu_to_be32(clock);
+
+	p = ft_get_prop(blob, "/" OF_SOC "/ethernet at 3000/mac-address", &len);
+	if (p != NULL)
+		memcpy(p, bd->bi_enetaddr, 6);
+
+}
+#endif
diff --git a/include/configs/IceCube.h b/include/configs/IceCube.h
index 1152f83..0d38254 100644
--- a/include/configs/IceCube.h
+++ b/include/configs/IceCube.h
@@ -172,6 +172,19 @@ #else
 #undef CFG_IPBSPEED_133   	/* define for 133MHz speed */
 #endif
 #endif /* CONFIG_MPC5200 */
+
+/* pass open firmware flat tree */
+#define CONFIG_OF_FLAT_TREE	1
+#define CONFIG_OF_BOARD_SETUP	1
+
+/* maximum size of the flat tree (8K) */
+#define OF_FLAT_TREE_MAX_SIZE	8192
+
+#define OF_CPU			"PowerPC,5200 at 0"
+#define OF_SOC			"soc5200 at f0000000"
+#define OF_TBCLK		(bd->bi_busfreq / 8)
+#define OF_STDOUT_PATH		"/soc5200 at f0000000/serial at 2000"
+
 /*
  * I2C configuration
  */
-- 
1.4.3.rc2.g0503