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author | Nandor Han <nandor.han@vaisala.com> | 2021-06-10 15:40:38 +0300 |
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committer | Heiko Schocher <hs@denx.de> | 2021-08-22 12:04:52 +0300 |
commit | c50b21b70523939c561d0455a2c423f63a9162ca (patch) | |
tree | 2732f82ac8bb61f20e210eb6c2b4a2f5d432c8ff /doc | |
parent | 7282b4352eba74e134c7ebba945338e418ec7faf (diff) | |
download | u-boot-c50b21b70523939c561d0455a2c423f63a9162ca.tar.xz |
bootcount: add a new driver with syscon as backend
The driver will use a syscon regmap as backend and supports both
16 and 32 size value. The value will be stored in the CPU's endianness.
Signed-off-by: Nandor Han <nandor.han@vaisala.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/device-tree-bindings/bootcount-syscon.txt | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/bootcount-syscon.txt b/doc/device-tree-bindings/bootcount-syscon.txt new file mode 100644 index 0000000000..e124f7b614 --- /dev/null +++ b/doc/device-tree-bindings/bootcount-syscon.txt @@ -0,0 +1,24 @@ +Bootcount Configuration +This is the implementation of the feature as described in +https://www.denx.de/wiki/DULG/UBootBootCountLimit. + +Required Properties: +- compatible: must be "u-boot,bootcount-syscon". +- syscon: reference to the syscon device used. +- reg: contains address and size of the register and the location and size of the bootcount value. + The driver supports a 4 bytes register length and 2 and 4 bytes bootcount value length. +- reg-names: must be "syscon_reg", "offset"; + +Example: + ... + syscon0: syscon@0 { + compatible = "sandbox,syscon0"; + reg = <0x10 16>; + }; + ... + bootcount@0 { + compatible = "u-boot,bootcount-syscon"; + syscon = <&syscon0>; + reg = <0x0 0x04>, <0x0 0x04>; + reg-names = "syscon_reg", "offset"; + }; |