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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2016-07-11 07:58:34 +0200 |
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| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-07-11 07:58:34 +0200 |
| commit | 202cda9475558213cf799206caf0130d45164d7f (patch) | |
| tree | abe9c88fbf8336e9c89aa22cd1b7ad8cfbf23ed1 /Documentation | |
| parent | bb73cb9427cdef4bb3a45ccfa10e30a50940ff09 (diff) | |
| parent | 699b4f80254de45a6ff45dff0a863e457dea7d89 (diff) | |
| download | barebox-202cda9475558213cf799206caf0130d45164d7f.tar.gz barebox-202cda9475558213cf799206caf0130d45164d7f.tar.xz | |
Merge branch 'for-next/nvdevvars'
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/user/variables.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/user/variables.rst b/Documentation/user/variables.rst index 0abc25d98a..89aadf58fd 100644 --- a/Documentation/user/variables.rst +++ b/Documentation/user/variables.rst @@ -66,6 +66,24 @@ examples: model: myboard barebox@yourboard:/ +Non volatile device variables +----------------------------- + +Non volatile device variables are used to make device parameters persistent. They +are regular nv variables but are linked with other devices instead of the global +device. Every nv variable in the form nv.dev.<devname>.<paramname> will be mirrored +to the corresponding <devname>.<paramname> variable. + +This example changes the partitioning of the nand0 device: + +.. code-block:: sh + barebox@Phytec phyCARD-i.MX27:/ nv dev.nand0.partitions: 4M(barebox),1M(barebox-environment),-(root) + barebox@Phytec phyCARD-i.MX27:/ devinfo nand0 + Parameters: + [...] + partitions: 4M(barebox),1M(barebox-environment),8M(kernel),1011M(root) + [...] + .. _magicvars: Magic variables |