This is a note to let you know that I've just added the patch titled
ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-dra7-evm-make-vdda_1v8_phy-supply-always-on.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From e120fb459693bbc1ac3eabdd65c3659d7cfbfd2a Mon Sep 17 00:00:00 2001
From: Roger Quadros <[email protected]>
Date: Fri, 4 Jul 2014 12:55:43 +0300
Subject: ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
From: Roger Quadros <[email protected]>
commit e120fb459693bbc1ac3eabdd65c3659d7cfbfd2a upstream.
After clarification from the hardware team it was found that
this 1.8V PHY supply can't be switched OFF when SoC is Active.
Since the PHY IPs don't contain isolation logic built in the design to
allow the power rail to be switched off, there is a very high risk
of IP reliability and additional leakage paths which can result in
additional power consumption.
The only scenario where this rail can be switched off is part of Power on
reset sequencing, but it needs to be kept always-on during operation.
This patch is required for proper functionality of USB, SATA
and PCIe on DRA7-evm.
CC: Rajendra Nayak <[email protected]>
CC: Tero Kristo <[email protected]>
Signed-off-by: Roger Quadros <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/boot/dts/dra7-evm.dts | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -182,6 +182,7 @@
regulator-name = "ldo3";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+ regulator-always-on;
regulator-boot-on;
};
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/arm-dts-dra7-evm-make-vdda_1v8_phy-supply-always-on.patch
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