Hi Jean-Christophe, Le 13/02/2013 18:12, Jean-Christophe PLAGNIOL-VILLARD a écrit : > On 17:45 Wed 13 Feb , Maxime Ripard wrote: >> 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"); >> +} > it's time to have a common code
I'm ok with doing it, where should it be stored? Maxime -- Maxime Ripard, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
