[U-Boot] [PATCH 2/3] ARM: board: cm_fx6: fixup mtd partitions in the fdt

[Igor Grinberg]

Hi Christopher,

On 06/19/2016 06:44 PM, Christopher Spinrath wrote:
> 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>
> ---
>  board/compulab/cm_fx6/cm_fx6.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
> index 712057a..81a7ae2 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>

Why is this needed?

>  #include "common.h"
>  #include "../common/eeprom.h"
>  #include "../common/common.h"
> @@ -581,6 +583,13 @@ int cm_fx6_setup_ecspi(void) { return 0; }
>  
>  #ifdef CONFIG_OF_BOARD_SETUP
>  #define USDHC3_PATH	"/soc/aips-bus at 02100000/usdhc at 02198000/"
> +
> +#ifdef CONFIG_FDT_FIXUP_PARTITIONS
> +struct node_info nodes[] = {
> +	{ "st,m25p",	MTD_DEV_TYPE_NOR,	},
> +};
> +#endif
> +
>  int ft_board_setup(void *blob, bd_t *bd)
>  {
>  	u32 baseboard_rev;
> @@ -589,6 +598,8 @@ 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 +618,6 @@ 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 +626,10 @@ int ft_board_setup(void *blob, bd_t *bd)
>  				     NULL, 0, 1);
>  	}
>  
> +#ifdef CONFIG_FDT_FIXUP_PARTITIONS
> +	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
> +#endif

I really dislike the ifdeffery inside functions.
Care to introduce a stub for the !CONFIG_FDT_FIXUP_PARTITIONS case in
include/fdt_support.h for this one?

> +
>  	return 0;
>  }
>  #endif
> 

-- 
Regards,
Igor.