From c50b21b70523939c561d0455a2c423f63a9162ca Mon Sep 17 00:00:00 2001 From: Nandor Han Date: Thu, 10 Jun 2021 15:40:38 +0300 Subject: 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 Reviewed-by: Simon Glass --- doc/device-tree-bindings/bootcount-syscon.txt | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 doc/device-tree-bindings/bootcount-syscon.txt (limited to 'doc') diff --git a/doc/device-tree-bindings/bootcount-syscon.txt b/doc/device-tree-bindings/bootcount-syscon.txt new file mode 100644 index 0000000..e124f7b --- /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"; + }; -- cgit v1.1