[PATCH v1 2/2] board: toradex: aquila-am69: Add support for 16GB dual rank memory configuration

[Emanuele Ghidoli]

From: Emanuele Ghidoli <emanuele.ghidoli at toradex.com>

Move the existing 16GB single-rank configuration to HW_CFG 0x03 and use
the previous HW_CFG 0x01 value for the new 16GB dual-rank configuration.

There is no hardware using the former 16GB single-rank configuration,
so reuse the HW_CFG value for the new 16GB dual-rank configuration,
which will be used in production.

Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli at toradex.com>
---
 board/toradex/aquila-am69/Makefile            |  1 +
 board/toradex/aquila-am69/aquila-am69.c       |  8 ++-
 board/toradex/aquila-am69/aquila_ddrs.h       |  1 +
 .../aquila-am69/aquila_ddrs_16GB_rank_2.c     | 54 +++++++++++++++++++
 4 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 board/toradex/aquila-am69/aquila_ddrs_16GB_rank_2.c

diff --git a/board/toradex/aquila-am69/Makefile b/board/toradex/aquila-am69/Makefile
index aa71c4bbb210..aa657ac8a420 100644
--- a/board/toradex/aquila-am69/Makefile
+++ b/board/toradex/aquila-am69/Makefile
@@ -6,4 +6,5 @@
 obj-y	+= aquila-am69.o
 obj-y	+= ddrs_patch.o
 obj-y	+= aquila_ddrs_16GB.o
+obj-y	+= aquila_ddrs_16GB_rank_2.o
 obj-y	+= aquila_ddrs_8GB.o
diff --git a/board/toradex/aquila-am69/aquila-am69.c b/board/toradex/aquila-am69/aquila-am69.c
index c3df14fc7c96..0c7123a059e4 100644
--- a/board/toradex/aquila-am69/aquila-am69.c
+++ b/board/toradex/aquila-am69/aquila-am69.c
@@ -23,8 +23,9 @@
 #define CTRL_MMR_CFG0_MCU_ADC1_CTRL	0x40F040B4
 
 #define HW_CFG_MEM_SZ_32GB		0x00
-#define HW_CFG_MEM_SZ_16GB		0x01
+#define HW_CFG_MEM_SZ_16GB_RANK_2	0x01
 #define HW_CFG_MEM_SZ_8GB		0x02
+#define HW_CFG_MEM_SZ_16GB		0x03
 
 #define HW_CFG_MEM_CFG_MASK		0x03
 
@@ -41,6 +42,7 @@ static u64 aquila_am69_memory_size(void)
 	switch (aquila_am69_memory_cfg()) {
 	case HW_CFG_MEM_SZ_32GB:
 		return SZ_32G;
+	case HW_CFG_MEM_SZ_16GB_RANK_2:
 	case HW_CFG_MEM_SZ_16GB:
 		return SZ_16G;
 	case HW_CFG_MEM_SZ_8GB:
@@ -88,6 +90,10 @@ static void update_ddr_timings(void)
 		ret = aquila_am69_fdt_apply_ddr_patch(fdt, aquila_am69_ddrss_patch_8GB,
 						      MULTI_DDR_CFG_INTRLV_SIZE_8GB);
 		break;
+	case HW_CFG_MEM_SZ_16GB_RANK_2:
+		ret = aquila_am69_fdt_apply_ddr_patch(fdt, aquila_am69_ddrss_patch_16GB_rank_2,
+						      MULTI_DDR_CFG_INTRLV_SIZE_16GB);
+		break;
 	case HW_CFG_MEM_SZ_16GB:
 		ret = aquila_am69_fdt_apply_ddr_patch(fdt, aquila_am69_ddrss_patch_16GB,
 						      MULTI_DDR_CFG_INTRLV_SIZE_16GB);
diff --git a/board/toradex/aquila-am69/aquila_ddrs.h b/board/toradex/aquila-am69/aquila_ddrs.h
index 3f6cecf5405f..7a58be3fd299 100644
--- a/board/toradex/aquila-am69/aquila_ddrs.h
+++ b/board/toradex/aquila-am69/aquila_ddrs.h
@@ -10,5 +10,6 @@
 
 extern struct ddrss_patch *aquila_am69_ddrss_patch_8GB[4];
 extern struct ddrss_patch *aquila_am69_ddrss_patch_16GB[4];
+extern struct ddrss_patch *aquila_am69_ddrss_patch_16GB_rank_2[4];
 
 #endif // __AQUILA_DDRS_H
diff --git a/board/toradex/aquila-am69/aquila_ddrs_16GB_rank_2.c b/board/toradex/aquila-am69/aquila_ddrs_16GB_rank_2.c
new file mode 100644
index 000000000000..c24e22b620b5
--- /dev/null
+++ b/board/toradex/aquila-am69/aquila_ddrs_16GB_rank_2.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) Toradex - https://www.toradex.com/
+ * This contains a diff against the 32GB register settings created from
+ * the 16GB dual rank tool output.
+
+ * The 16GB dtsi file was generated with the following tool revisions:
+ *     - SysConfig: Revision 1.26.2+4477
+ *     - Jacinto7_DDRSS_RegConfigTool: Revision 0.12.0
+ * This file was generated on Fri Mar 06 2026 10:39:50 GMT+0100 (Central European Standard Time)
+ */
+
+#include <asm/u-boot.h>
+#include <linux/kernel.h>
+#include "ddrs_patch.h"
+
+#define DDRSS_PLL_FHS_CNT 3
+
+#define DDRSS_CTL_268_DATA 0x01010000
+#define DDRSS_CTL_270_DATA 0x00000FFF
+#define DDRSS_CTL_271_DATA 0x1FFF1000
+#define DDRSS_CTL_272_DATA 0x01FF0000
+#define DDRSS_CTL_273_DATA 0x000101FF
+
+#define DDRSS_PI_73_DATA 0x00080100
+
+static struct ddr_reg_patch ctl_patch[] = {
+	{ 268, DDRSS_CTL_268_DATA},
+	{ 270, DDRSS_CTL_270_DATA},
+	{ 271, DDRSS_CTL_271_DATA},
+	{ 272, DDRSS_CTL_272_DATA},
+	{ 273, DDRSS_CTL_273_DATA}
+};
+
+static struct ddr_reg_patch pi_patch[] = {
+	{ 73, DDRSS_PI_73_DATA},
+};
+
+static struct ddrss_patch ddrss_ctrl_patch = {
+	.ddr_fhs_cnt = DDRSS_PLL_FHS_CNT,
+	.ctl_patch = ctl_patch,
+	.ctl_patch_num = ARRAY_SIZE(ctl_patch),
+	.pi_patch = pi_patch,
+	.pi_patch_num = ARRAY_SIZE(pi_patch),
+	.phy_patch = NULL,
+	.phy_patch_num = 0
+};
+
+struct ddrss_patch *aquila_am69_ddrss_patch_16GB_rank_2[4] = {
+	&ddrss_ctrl_patch,
+	&ddrss_ctrl_patch,
+	&ddrss_ctrl_patch,
+	&ddrss_ctrl_patch
+};
-- 
2.43.0