On Wednesday 09 July 2014 04:20 PM, Tony Lindgren wrote:
* Keerthy <a0393675@xxxxxx> [140709 03:39]:
On Wednesday 09 July 2014 03:39 PM, Tony Lindgren wrote:
* Keerthy <a0393675@xxxxxx> [140709 02:36]:
On Wednesday 09 July 2014 02:42 PM, Tony Lindgren wrote:
* Lokesh Vutla <lokeshvutla@xxxxxx> [140709 01:37]:
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -249,6 +249,7 @@
regulator-min-microvolt = <1050000>;
regulator-max-microvolt = <1050000>;
regulator-boot-on;
+ regulator-always-on;
};
Is this regulator really always on?
This feeds on to RTC which is a free running clock. So i guess always on is
justified no?
Well the dts entries should describe the hardware. If the
regulator can be enabled and disabled, we should not claim it's
always on.
From the PMIC perspective every regulator can be enabled and
disabled. From a Board perspective there are some which need
to be always on. For Ex: SMPS123 which feeds on to the MPU.
Right, and we already have regulator-boot-on for those. Or are
you seeing some issue with that?
regulator-boot-on describes that at boot a particular regulator is on.
It does not guarantee that it will be on for the rest of the time. The
regulator framework can go ahead and disable it if no one has requested
for it. In case of RTC we do not want that to happen.
I guess RTC also needs the supply to be on as long as we want
the clock to be ticking.
Sure, but if somebody wants shut it off regulator-boot-on is
better from driver point of view.
Regards,
Tony
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