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| author | Boris BREZILLON <boris.brezillon@free-electrons.com> | 2014-09-11 15:18:45 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-09-26 09:23:56 +0200 |
| commit | c896e68ec1a0548f29b3d29f6c14a29cf06aa56c (patch) | |
| tree | a23349187badefc6bb46da3960309b31013b46f3 /Documentation/devicetree | |
| parent | mfd: rk808: Add register caching (diff) | |
| download | linux-c896e68ec1a0548f29b3d29f6c14a29cf06aa56c.tar.xz linux-c896e68ec1a0548f29b3d29f6c14a29cf06aa56c.zip | |
mfd: syscon: Add Atmel GPBR DT bindings documention
The GPBR block provides a set of battery-backed registers that can be used
to save data which need to be kept when the system is powered down and
VDD-core is maintained by an external battery.
A typical usage is the RTT block (when used as an RTC) which needs one of
those registers to save the current time.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Johan Hovold <johan@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/mfd/atmel,gpbr.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt b/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt new file mode 100644 index 000000000000..a28569540683 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt @@ -0,0 +1,15 @@ +* Device tree bindings for Atmel GPBR (General Purpose Backup Registers) + +The GPBR are a set of battery-backed registers. + +Required properties: +- compatible: "atmel,at91sam9260-gpbr", "syscon" +- reg: contains offset/length value of the GPBR memory + region. + +Example: + +gpbr: gpbr@fffffd50 { + compatible = "atmel,at91sam9260-gpbr", "syscon"; + reg = <0xfffffd50 0x10>; +}; |