[PATCH v6 5/7] rockchip: Add SPL_PAD_TO Kconfig default value

[Jonas Karlman]

Almost all Rockchip boards use the same Kconfig value for SPL_PAD_TO,
0x7f8000.

u-boot-rockchip.bin is typically written to offset 64S (32KiB) of MMC
media. u-boot.itb (or u-boot.img) is typically expected at offset 16384S
(8MiB) of MMC media (SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x4000).

SPL_PAD_TO is used as the offset for u-boot.itb (or u-boot.img) in the
generated simple-bin binman image, and can be calculated as:

  SPL_PAD_TO = (16384S - 64S) * 512 = 0x7f8000

Add this value as a default value for ARCH_ROCKCHIP.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>
Reviewed-by: Quentin Schulz <quentin.schulz at cherry.de>
---
Changes in v6:
- No change

Changes in v5:
- Update commit message
- Collect r-b tags

Changes in v4:
- New patch

This patch does not drop SPL_PAD_TO from existing defconfigs that would
be affected by this change, something that can wait until next "configs:
Resync with savedefconfig".

Following boards does not set a SPL_PAD_TO due to not using SPL:
- elgin-rv1108_defconfig
- evb-rk3128_defconfig
- evb-rv1108_defconfig
- geekbox_defconfig
- sheep-rk3368_defconfig
---
 common/spl/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index c08045f9c8d7..3f8d24e8d0f5 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -96,6 +96,7 @@ config SPL_MAX_SIZE
 
 config SPL_PAD_TO
 	hex "Offset to which the SPL should be padded before appending the SPL payload"
+	default 0x7f8000 if ARCH_ROCKCHIP
 	default 0x31000 if ARCH_MX6 && MX6_OCRAM_256KB
 	default 0x11000 if ARCH_MX7 || (ARCH_MX6 && !MX6_OCRAM_256KB)
 	default 0x10000 if ARCH_KEYSTONE
-- 
2.49.0