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.
Signed-off-by: Maxime Ripard <[email protected]> --- 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); -- 1.7.10.4 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
