[U-Boot] [PATCH v2 3/4] ARM: board: cm_fx6: fixup mtd partitions in the fdt

[christopher.spinrath at rwth-aachen.de]

From: Christopher Spinrath <christopher.spinrath at rwth-aachen.de>

The cm-fx6 module has an on-board st,m25p compatible spi flash chip
used for U-Boot (binary & environment). Overwrite the partitions in
the device tree by the partition table provided in the mtdparts
environment variable, if it is set.

This allows to specify a kernel independent partitioning in the
environment and provides a convient way for the user to adapt the
partition table.

Signed-off-by: Christopher Spinrath <christopher.spinrath at rwth-aachen.de>
---

Notes:
    Changes since v1:
     - remove #ifdef CONFIG_FDT_FIXUP_PARTITIONS guards (no longer required
       thanks to the stub introduced by patch 2 of this series)
     - fallback to the documented jedec,spi-nor compatible if the
       undocumented compatible st,m25p used by the vendor device treeis not
       in the dt

 board/compulab/cm_fx6/cm_fx6.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index 712057a..566c19b 100644
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -12,6 +12,7 @@
 #include <dm.h>
 #include <fsl_esdhc.h>
 #include <miiphy.h>
+#include <mtd_node.h>
 #include <netdev.h>
 #include <errno.h>
 #include <usb.h>
@@ -28,6 +29,7 @@
 #include <asm/io.h>
 #include <asm/gpio.h>
 #include <dm/platform_data/serial_mxc.h>
+#include <jffs2/load_kernel.h>
 #include "common.h"
 #include "../common/eeprom.h"
 #include "../common/common.h"
@@ -581,6 +583,17 @@ int cm_fx6_setup_ecspi(void) { return 0; }
 
 #ifdef CONFIG_OF_BOARD_SETUP
 #define USDHC3_PATH	"/soc/aips-bus at 02100000/usdhc at 02198000/"
+
+struct node_info nodes[] = {
+	/*
+	 * Both entries target the same flash chip. The st,m25p compatible
+	 * is used in the vendor device trees, while upstream uses (the
+	 * documented) jedec,spi-nor comptatible.
+	 */
+	{ "st,m25p",	MTD_DEV_TYPE_NOR,	},
+	{ "jedec,spi-nor",	MTD_DEV_TYPE_NOR,	},
+};
+
 int ft_board_setup(void *blob, bd_t *bd)
 {
 	u32 baseboard_rev;
@@ -589,6 +602,8 @@ int ft_board_setup(void *blob, bd_t *bd)
 	char baseboard_name[16];
 	int err;
 
+	fdt_shrink_to_minimum(blob); /* Make room for new properties */
+
 	/* MAC addr */
 	if (eth_getenv_enetaddr("ethaddr", enetaddr)) {
 		fdt_find_and_setprop(blob,
@@ -607,7 +622,6 @@ int ft_board_setup(void *blob, bd_t *bd)
 		return 0; /* Assume not an early revision SB-FX6m baseboard */
 
 	if (!strncmp("SB-FX6m", baseboard_name, 7) && baseboard_rev <= 120) {
-		fdt_shrink_to_minimum(blob); /* Make room for new properties */
 		nodeoffset = fdt_path_offset(blob, USDHC3_PATH);
 		fdt_delprop(blob, nodeoffset, "cd-gpios");
 		fdt_find_and_setprop(blob, USDHC3_PATH, "broken-cd",
@@ -616,6 +630,8 @@ int ft_board_setup(void *blob, bd_t *bd)
 				     NULL, 0, 1);
 	}
 
+	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
+
 	return 0;
 }
 #endif
-- 
2.9.0