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authorTony Lindgren <tony@atomide.com>2014-05-14 03:34:09 +0200
committerLee Jones <lee.jones@linaro.org>2014-05-28 09:06:18 +0200
commit43fef47f94a1ae46fb2720dada32fa3b5547bee2 (patch)
treef01e73e8aed5a4fb21a6a46314a6a105fb614627 /Documentation
parentmfd: twl4030-power: Add support for board specific configuration (diff)
downloadlinux-43fef47f94a1ae46fb2720dada32fa3b5547bee2.tar.xz
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mfd: twl4030-power: Add a configuration to turn off oscillator during off-idle
Some oscillators can be turned off during off-idle saving few a little bit power at the cost of the oscillator start up latency. If you board can do this, you can now enable it by using the ti,twl4030-power-idle-osc-off compatible flag. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/mfd/twl4030-power.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/twl4030-power.txt b/Documentation/devicetree/bindings/mfd/twl4030-power.txt
index bbd66039202a..b9ee7b98d3e2 100644
--- a/Documentation/devicetree/bindings/mfd/twl4030-power.txt
+++ b/Documentation/devicetree/bindings/mfd/twl4030-power.txt
@@ -9,6 +9,7 @@ Required properties:
"ti,twl4030-power"
"ti,twl4030-power-reset"
"ti,twl4030-power-idle"
+ "ti,twl4030-power-idle-osc-off"
The use of ti,twl4030-power-reset is recommended at least on
3530 that needs a special configuration for warm reset to work.
@@ -16,6 +17,11 @@ The use of ti,twl4030-power-reset is recommended at least on
When using ti,twl4030-power-idle, the TI recommended configuration
for idle modes is loaded to the tlw4030 PMIC.
+When using ti,twl4030-power-idle-osc-off, the TI recommended
+configuration is used with the external oscillator being shut
+down during off-idle. Note that this does not work on all boards
+depending on how the external oscillator is wired.
+
Optional properties:
- ti,use_poweroff: With this flag, the chip will initiates an ACTIVE-to-OFF or
SLEEP-to-OFF transition when the system poweroffs.