[PATCH] ARM: rpi: add SD card environment support

[Andre Heider]

Hi,

On Tue, Oct 15, 2013 at 12:50:14PM +0200, Sascha Hauer wrote:
> Similar to the OMAP boards mount the SD card to /boot and expect
> the environment as /boot/barebox.env
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
>  arch/arm/boards/raspberry-pi/rpi.c | 33 +++++++++++++++++++++++++++++++--
>  1 file changed, 31 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boards/raspberry-pi/rpi.c b/arch/arm/boards/raspberry-pi/rpi.c
> index d4912cc..971a603 100644
> --- a/arch/arm/boards/raspberry-pi/rpi.c
> +++ b/arch/arm/boards/raspberry-pi/rpi.c
> @@ -15,6 +15,9 @@
>  
>  #include <common.h>
>  #include <init.h>
> +#include <fs.h>
> +#include <linux/stat.h>
> +#include <envfs.h>
>  #include <asm/armlinux.h>
>  #include <generated/mach-types.h>
>  
> @@ -37,11 +40,37 @@ static int rpi_console_init(void)
>  }
>  console_initcall(rpi_console_init);
>  
> +static int rpi_env_init(void)
> +{
> +	struct stat s;
> +	const char *diskdev = "/dev/disk0.0";
> +	int ret;
> +
> +	device_detect_by_name("mci0");
> +
> +	ret = stat(diskdev, &s);
> +	if (ret) {
> +		printf("no %s. using default env\n", diskdev);
> +		return 0;
> +	}
> +
> +	mkdir("/boot", 0666);
> +	ret = mount(diskdev, "fat", "/boot");
> +	if (ret) {
> +		printf("failed to mount %s\n", diskdev);
> +		return 0;
> +	}
> +
> +	default_environment_path = "/boot/barebox.env";
> +
> +	return 0;
> +}

I was solving the same thing just yesterday ;)

What I did was to create a env/init/automount script, what's the advantage of this approach?

Regards,
Andre