Document the new optional properties related to DDR Backup Mode and
toggle/momentary power switches.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
---
Acked-for-MFD-by: Lee Jones <lee.jones@xxxxxxxxxx>
v3:
- Add Reviewed-by, Acked-for-MFD-by (for Lee's own reference),
- Use a hex value for the bit mask,
v2:
- Improve property description,
- Add properties for power switch type.
---
Documentation/devicetree/bindings/mfd/bd9571mwv.txt | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
index 9ab216a851d5619b..25d1f697eb25c67d 100644
--- a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
+++ b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
@@ -25,6 +25,25 @@ Required properties:
Each child node is defined using the standard
binding for regulators.
+Optional properties:
+ - rohm,ddr-backup-power : Value to use for DDR-Backup Power (default 0).
+ This is a bitmask that specifies which DDR power
+ rails need to be kept powered when backup mode is
+ entered, for system suspend:
+ - bit 0: DDR0
+ - bit 1: DDR1
+ - bit 2: DDR0C
+ - bit 3: DDR1C
+ These bits match the KEEPON_DDR* bits in the
+ documentation for the "BKUP Mode Cnt" register.
+ - rohm,rstbmode-level: The RSTB signal is configured for level mode, to
+ accommodate a toggle power switch (the RSTBMODE pin is
+ strapped low).
+ - rohm,rstbmode-pulse: The RSTB signal is configured for pulse mode, to
+ accommodate a momentary power switch (the RSTBMODE pin
+ is strapped high).
+ The two properties above are mutually exclusive.
+
Example:
pmic: pmic@30 {
@@ -36,6 +55,8 @@ Example:
#interrupt-cells = <2>;
gpio-controller;
#gpio-cells = <2>;
+ rohm,ddr-backup-power = <0xf>;
+ rohm,rstbmode-pulse;
regulators {
dvfs: dvfs {
--
2.7.4
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