[U-Boot] [PATCH v7 3/4] mx28: Let dram_init be common for mx28

[Fabio Estevam <festevam@gmail.com>]

Let dram_init function be a common function, so that other mx28 boards
can reuse it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
---
Changes since v6:
- Added Acked-by line
Changes since v5:
- Change return value on dram_init() 
Changes since v4:
- Call mx28_dram_init from m28evk.c
Changes since v3:
- Rename dram_init to mx28_dram_init
 arch/arm/cpu/arm926ejs/mx28/mx28.c         |   21 +++++++++++++++++++++
 arch/arm/include/asm/arch-mx28/sys_proto.h |    2 ++
 board/denx/m28evk/m28evk.c                 |   18 +-----------------
 3 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/mx28/mx28.c b/arch/arm/cpu/arm926ejs/mx28/mx28.c
index ee4e337..c95e900 100644
--- a/arch/arm/cpu/arm926ejs/mx28/mx28.c
+++ b/arch/arm/cpu/arm926ejs/mx28/mx28.c
@@ -260,6 +260,27 @@ void imx_get_mac_from_fuse(int dev_id, char *mac)
 }
 #endif
 
+#define	HW_DIGCTRL_SCRATCH0	0x8001c280
+#define	HW_DIGCTRL_SCRATCH1	0x8001c290
+int mx28_dram_init(void)
+{
+	uint32_t sz[2];
+
+	sz[0] = readl(HW_DIGCTRL_SCRATCH0);
+	sz[1] = readl(HW_DIGCTRL_SCRATCH1);
+
+	if (sz[0] != sz[1]) {
+		printf("MX28:\n"
+			"Error, the RAM size in HW_DIGCTRL_SCRATCH0 and\n"
+			"HW_DIGCTRL_SCRATCH1 is not the same. Please\n"
+			"verify these two registers contain valid RAM size!\n");
+		hang();
+	}
+
+	gd->ram_size = sz[0];
+	return 0;
+}
+
 U_BOOT_CMD(
 	clocks,	CONFIG_SYS_MAXARGS, 1, do_mx28_showclocks,
 	"display clocks",
diff --git a/arch/arm/include/asm/arch-mx28/sys_proto.h b/arch/arm/include/asm/arch-mx28/sys_proto.h
index be1f7db..f101494 100644
--- a/arch/arm/include/asm/arch-mx28/sys_proto.h
+++ b/arch/arm/include/asm/arch-mx28/sys_proto.h
@@ -35,4 +35,6 @@ void mx28_common_spl_init(const iomux_cfg_t *iomux_setup,
 			const unsigned int iomux_size);
 #endif
 
+int mx28_dram_init(void);
+
 #endif	/* __MX28_H__ */
diff --git a/board/denx/m28evk/m28evk.c b/board/denx/m28evk/m28evk.c
index 005446a..53df476 100644
--- a/board/denx/m28evk/m28evk.c
+++ b/board/denx/m28evk/m28evk.c
@@ -70,25 +70,9 @@ int board_init(void)
 	return 0;
 }
 
-#define	HW_DIGCTRL_SCRATCH0	0x8001c280
-#define	HW_DIGCTRL_SCRATCH1	0x8001c290
 int dram_init(void)
 {
-	uint32_t sz[2];
-
-	sz[0] = readl(HW_DIGCTRL_SCRATCH0);
-	sz[1] = readl(HW_DIGCTRL_SCRATCH1);
-
-	if (sz[0] != sz[1]) {
-		printf("MX28:\n"
-			"Error, the RAM size in HW_DIGCTRL_SCRATCH0 and\n"
-			"HW_DIGCTRL_SCRATCH1 is not the same. Please\n"
-			"verify these two registers contain valid RAM size!\n");
-		hang();
-	}
-
-	gd->ram_size = sz[0];
-	return 0;
+	return mx28_dram_init();
 }
 
 #ifdef	CONFIG_CMD_MMC
-- 
1.7.1