Hi Maxime,
Le Wed, 13 Feb 2013 17:45:17 +0100,
Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> a écrit :
> Since the only storage medium on the cfa-10036 is the MMC card, we need
> to have a registered environment partition on it if we want to be able
> to modify at runtime.
>
maybe you could add :
code copied from imx23-olinuxino.c
Eric
> Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
> ---
> arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 44 +++++++++++++++++++++-
> 1 file changed, 43 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> index b59dbab..1821b10 100644
> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
> }
> mem_initcall(cfa10036_mem_init);
>
> +/**
> + * Try to register an environment storage on the attached MCI card
> + * @return 0 on success
> + *
> + * We rely on the existence of a usable SD card, already attached to
> + * our system, to get something like a persistent memory for our environment.
> + * If this SD card is also the boot media, we can use the second partition
> + * for our environment purpose (if present!).
> + */
> +static int register_persistant_environment(void)
> +{
> + struct cdev *cdev;
> +
> + /*
> + * The CFA-10036 only has one MCI card socket.
> + * So, we expect its name as "disk0".
> + */
> + cdev = cdev_by_name("disk0");
> + if (cdev == NULL) {
> + pr_err("No SD card found\n");
> + return -ENODEV;
> + }
> +
> + /* MCI card is present, also a useable partition on it? */
> + cdev = cdev_by_name("disk0.1");
> + if (cdev == NULL) {
> + pr_err("No second partition available\n");
> + pr_info("Please create at least a second partition with"
> + " 256 kiB...512 kiB in size (your choice)\n");
> + return -ENODEV;
> + }
> +
> + /* use the full partition as our persistent environment storage */
> + return devfs_add_partition("disk0.1", 0, cdev->size,
> + DEVFS_PARTITION_FIXED, "env0");
> +}
> +
> static int cfa10036_devices_init(void)
> {
> - int i;
> + int i, ret;
>
> /* initizalize muxing */
> for (i = 0; i < ARRAY_SIZE(cfa10036_pads); i++)
> @@ -124,6 +161,11 @@ static int cfa10036_devices_init(void)
>
> cfa10036_detect_hw();
>
> + ret = register_persistant_environment();
> + if (ret != 0)
> + printf("Cannot create the 'env0' persistant "
> + "environment storage (%d)\n", ret);
> +
> return 0;
> }
> device_initcall(cfa10036_devices_init);
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