From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: barebox@lists.infradead.org
Cc: Brian Lilly <brian@crystalfontz.com>
Subject: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment
Date: Wed, 13 Feb 2013 17:45:17 +0100 [thread overview]
Message-ID: <1360773918-10663-2-git-send-email-maxime.ripard@free-electrons.com> (raw)
In-Reply-To: <1360773918-10663-1-git-send-email-maxime.ripard@free-electrons.com>
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 <maxime.ripard@free-electrons.com>
---
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
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next prev parent reply other threads:[~2013-02-13 16:46 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-13 16:45 [PATCH 0/2] ARM: cfa10036: Store the barebox environment on the MMC Maxime Ripard
2013-02-13 16:45 ` Maxime Ripard [this message]
2013-02-13 17:10 ` [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment Eric Bénard
2013-02-13 17:12 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-14 9:52 ` Maxime Ripard
2013-02-14 8:16 ` Juergen Beisert
2013-02-14 10:10 ` Maxime Ripard
2013-02-14 11:17 ` Eric Bénard
2013-02-14 11:56 ` [PATCH 1/3] env: add register_persistent_environment Eric Bénard
2013-02-14 11:56 ` [PATCH 2/3] imx23-olinuxino: swith to generic peristent env Eric Bénard
2013-02-14 11:56 ` [PATCH 3/3] falconwing: switch " Eric Bénard
2013-02-14 12:09 ` Juergen Beisert
2013-02-14 13:20 ` [PATCH v2] " Eric Bénard
2013-02-14 13:50 ` [PATCH v3] " Eric Bénard
2013-02-14 19:31 ` [PATCH 1/3] env: add register_persistent_environment Sascha Hauer
2013-02-19 9:17 ` [PATCH v4 " Eric Bénard
2013-02-19 9:17 ` [PATCH v4 2/3] imx23-olinuxino: swith to generic peristent env Eric Bénard
2013-02-19 9:17 ` [PATCH v4 3/3] falconwing: switch " Eric Bénard
2013-02-19 11:58 ` [PATCH v4 1/3] env: add register_persistent_environment Jean-Christophe PLAGNIOL-VILLARD
2013-02-19 13:41 ` Eric Bénard
2013-02-19 15:35 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-19 15:49 ` Eric Bénard
2013-02-19 15:57 ` Eric Bénard
2013-02-19 19:21 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-21 6:55 ` Eric Bénard
2013-02-21 11:20 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-21 13:52 ` Sascha Hauer
2013-02-13 16:45 ` [PATCH 2/2] cfa10036: Update the environment Maxime Ripard
2013-02-26 16:50 [PATCHv2 0/2] ARM: cfa10036: Store the barebox environment on the MMC Maxime Ripard
2013-02-26 16:50 ` [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment Maxime Ripard
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