[PATCH v2] ARM: mvebu: x530: Add option for ECC

[Chris Packham]

Some older x530 boards have layout issues that cause problems for DDR.
These are usually seen as training failures but can also cause problems
after training has completed. Add an option to enable ECC leaving the
default as N which will work with both old and new boards.

Signed-off-by: Chris Packham <judge.packham at gmail.com>
Reviewed-by: Stefan Roese <sr at denx.de>
---

Changes in v2:
- Define Kconfig symbol for SPL.

 arch/arm/mach-mvebu/Kconfig      |  1 +
 board/alliedtelesis/x530/Kconfig | 25 +++++++++++++++++++++++++
 board/alliedtelesis/x530/x530.c  |  8 +++++++-
 3 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 board/alliedtelesis/x530/Kconfig

diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index d23cc0c760f1..7388ade98d52 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -341,5 +341,6 @@ config SECURED_MODE_CSK_INDEX
 
 source "board/solidrun/clearfog/Kconfig"
 source "board/kobol/helios4/Kconfig"
+source "board/alliedtelesis/x530/Kconfig"
 
 endif
diff --git a/board/alliedtelesis/x530/Kconfig b/board/alliedtelesis/x530/Kconfig
new file mode 100644
index 000000000000..9e676f17f39c
--- /dev/null
+++ b/board/alliedtelesis/x530/Kconfig
@@ -0,0 +1,25 @@
+menu "x530 configuration"
+	depends on TARGET_X530
+
+config X530_ECC
+	bool "Enable DDR3 ECC"
+	help
+	  Some of the older x530 board have layout issues which cause problems
+	  for the DDR which usually exhibit as DDR training failures or
+	  problems accessing DDR after training.
+
+	  The known affected boards are:
+
+	  * 844-001897-00 (x530-28GTXm, x530-28GPXm, GS980MX/28PSm)
+	  * 844-001948-00 (GS980MX/28)
+	  * 844-002008-00 (x530L-52GTX, x530L-52GPX)
+	  * 844-001974-00 (x530-52GTXm, x530-52GPXm, GS980MX/52PSm)
+
+	  If you have a newer board you can set Y here, otherwise say N.
+
+config SPL_X530_ECC
+	bool
+	depends on X530_ECC
+	default X530_ECC
+
+endmenu
diff --git a/board/alliedtelesis/x530/x530.c b/board/alliedtelesis/x530/x530.c
index 866b6e68cc16..de20684f4353 100644
--- a/board/alliedtelesis/x530/x530.c
+++ b/board/alliedtelesis/x530/x530.c
@@ -45,6 +45,12 @@ int hws_board_topology_load(struct serdes_map **serdes_map_array, u8 *count)
 	return 0;
 }
 
+#if CONFIG_IS_ENABLED(X530_ECC)
+	#define BUS_MASK BUS_MASK_32BIT_ECC
+#else
+	#define BUS_MASK BUS_MASK_32BIT
+#endif
+
 /*
  * Define the DDR layout / topology here in the board file. This will
  * be used by the DDR3 init code in the SPL U-Boot version to configure
@@ -66,7 +72,7 @@ static struct mv_ddr_topology_map board_topology_map = {
 	    0, 0,			/* cas_l cas_wl */
 	    MV_DDR_TEMP_LOW,		/* temperature */
 	    MV_DDR_TIM_2T} },		/* timing */
-	BUS_MASK_32BIT_ECC,		/* subphys mask */
+	BUS_MASK,			/* subphys mask */
 	MV_DDR_CFG_DEFAULT,		/* ddr configuration data source */
 	NOT_COMBINED,			/* ddr twin-die combined */
 	{ {0} },			/* raw spd data */
-- 
2.34.1