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authorRoger Quadros <rogerq@ti.com>2014-07-04 12:55:43 +0300
committerTony Lindgren <tony@atomide.com>2014-07-07 04:57:06 -0700
commite120fb459693bbc1ac3eabdd65c3659d7cfbfd2a (patch)
treed387b35d44cfbb05fda41ab1dabeb2893c018b7c /arch/arm
parent7abb1a530e87fce0d73f85ac7802648bb542cf26 (diff)
ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
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 <rnayak@ti.com> CC: Tero Kristo <t-kristo@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/boot/dts/dra7-evm.dts1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index 4adc28039c30..83089540e324 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -240,6 +240,7 @@
regulator-name = "ldo3";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
+ regulator-always-on;
regulator-boot-on;
};