[PATCH 6/8] board: ti: am64x: Account for DDR size fixups if ECC is enabled

[Dave Gerlach]

Call into k3-ddrss driver to fixup device tree and resize the available
amount of DDR if ECC is enabled.

A second fixup is required from A53 SPL to take the fixup as done from
R5 SPL and apply it to DT passed to A53 U-boot, which in turn passes
this to the OS.

Signed-off-by: Dave Gerlach <d-gerlach at ti.com>
---
 board/ti/am64x/evm.c | 55 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 2 deletions(-)

diff --git a/board/ti/am64x/evm.c b/board/ti/am64x/evm.c
index 7ea80b82bec5..c88139ac7acc 100644
--- a/board/ti/am64x/evm.c
+++ b/board/ti/am64x/evm.c
@@ -2,13 +2,15 @@
 /*
  * Board specific initialization for AM642 EVM
  *
- * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2020-2022 Texas Instruments Incorporated - https://www.ti.com/
  *	Keerthy <j-keerthy at ti.com>
  *
  */
 
 #include <common.h>
 #include <asm/io.h>
+#include <dm/uclass.h>
+#include <k3-ddrss.h>
 #include <spl.h>
 #include <fdt_support.h>
 #include <asm/arch/hardware.h>
@@ -66,7 +68,8 @@ int board_fit_config_name_match(const char *name)
 }
 #endif
 
-#if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USB_STORAGE)
+#if defined(CONFIG_SPL_BUILD)
+#if CONFIG_IS_ENABLED(USB_STORAGE)
 static int fixup_usb_boot(const void *fdt_blob)
 {
 	int ret = 0;
@@ -90,10 +93,58 @@ static int fixup_usb_boot(const void *fdt_blob)
 
 	return ret;
 }
+#endif
+
+#if defined(CONFIG_K3_AM64_DDRSS)
+static void fixup_ddr_driver_for_ecc(struct spl_image_info *spl_image)
+{
+	struct udevice *dev;
+	int ret;
+
+	dram_init_banksize();
+
+	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (ret)
+		panic("Cannot get RAM device for ddr size fixup: %d\n", ret);
+
+	ret = k3_ddrss_ddr_fdt_fixup(dev, spl_image->fdt_addr, gd->bd);
+	if (ret)
+		printf("Error fixing up ddr node for ECC use! %d\n", ret);
+}
+#else
+static void fixup_memory_node(struct spl_image_info *spl_image)
+{
+	u64 start[CONFIG_NR_DRAM_BANKS];
+	u64 size[CONFIG_NR_DRAM_BANKS];
+	int bank;
+	int ret;
+
+	dram_init();
+	dram_init_banksize();
+
+	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
+		start[bank] =  gd->bd->bi_dram[bank].start;
+		size[bank] = gd->bd->bi_dram[bank].size;
+	}
+
+	/* dram_init functions use SPL fdt, and we must fixup u-boot fdt */
+	ret = fdt_fixup_memory_banks(spl_image->fdt_addr, start, size, CONFIG_NR_DRAM_BANKS);
+	if (ret)
+		printf("Error fixing up memory node! %d\n", ret);
+}
+#endif
 
 void spl_perform_fixups(struct spl_image_info *spl_image)
 {
+#if defined(CONFIG_K3_AM64_DDRSS)
+	fixup_ddr_driver_for_ecc(spl_image);
+#else
+	fixup_memory_node(spl_image);
+#endif
+
+#if CONFIG_IS_ENABLED(USB_STORAGE)
 	fixup_usb_boot(spl_image->fdt_addr);
+#endif
 }
 #endif
 
-- 
2.35.0