[U-Boot] [PATCH] board: topic: Detect RAM size at boot

[Mike Looijmans]

Miami boards can have memory sizes of 256M, 512M or 1GB. To prevent requiring
separate bootloaders for each variant, just detect the RAM size at boot time
instead of relying on the devicetree information.

Signed-off-by: Mike Looijmans <mike.looijmans at topic.nl>
---
 board/topic/zynq/board.c          | 39 +++++++++++++++++++++++++++++++++++++++
 configs/topic_miami_defconfig     |  1 +
 configs/topic_miamiplus_defconfig |  1 +
 3 files changed, 41 insertions(+)

diff --git a/board/topic/zynq/board.c b/board/topic/zynq/board.c
index a95c9d1..8a5765e 100644
--- a/board/topic/zynq/board.c
+++ b/board/topic/zynq/board.c
@@ -1 +1,40 @@
+/*
+ * (C) Copyright 2016 Topic Embedded Products
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Miami boards can have memory sizes of 256M, 512M or 1GB. To prevent needing
+ * separate bootloaders for each variant, just detect the RAM size at boot time
+ * instead of relying on the devicetree information.
+ */
+#define CONFIG_SYS_SDRAM_BASE	0
+#define CONFIG_SYS_SDRAM_SIZE	topic_get_sdram_size()
+#define CONFIG_SYS_SDRAM_SIZE_MAX 0x40000000u
+
+static unsigned int topic_get_sdram_size(void);
+
 #include "../../xilinx/zynq/board.c"
+
+#include <fdt_support.h>
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	fdt_fixup_memory(blob, (u64)CONFIG_SYS_SDRAM_BASE, (u64)gd->ram_size);
+
+	return 0;
+}
+
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = gd->ram_size;
+}
+
+unsigned int topic_get_sdram_size(void)
+{
+	/* Detect and fix ram size */
+	return get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
+					   CONFIG_SYS_SDRAM_SIZE_MAX);
+}
diff --git a/configs/topic_miami_defconfig b/configs/topic_miami_defconfig
index 3d6161e..8a02668 100644
--- a/configs/topic_miami_defconfig
+++ b/configs/topic_miami_defconfig
@@ -24,6 +24,7 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_EMBED=y
+CONFIG_OF_BOARD_SETUP=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_ZYNQ_SDHCI=y
 CONFIG_SPI_FLASH=y
diff --git a/configs/topic_miamiplus_defconfig b/configs/topic_miamiplus_defconfig
index 3160f00..08bfab2 100644
--- a/configs/topic_miamiplus_defconfig
+++ b/configs/topic_miamiplus_defconfig
@@ -24,6 +24,7 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_EMBED=y
+CONFIG_OF_BOARD_SETUP=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_ZYNQ_SDHCI=y
 CONFIG_SPI_FLASH=y
-- 
1.9.1