Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758045AbaGOROd (ORCPT ); Tue, 15 Jul 2014 13:14:33 -0400 Received: from mail-we0-f178.google.com ([74.125.82.178]:57116 "EHLO mail-we0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755726AbaGORCO (ORCPT ); Tue, 15 Jul 2014 13:02:14 -0400 From: Sam Asadi To: gregkh@linuxfoundation.org Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Roger Quadros , Rajendra Nayak , Tero Kristo , Tony Lindgren , sam-the-6 Subject: [PATCH 43/94] ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on Date: Tue, 15 Jul 2014 20:00:58 +0300 Message-Id: <1405443709-15288-43-git-send-email-asadi.samuel@gmail.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1405443709-15288-1-git-send-email-asadi.samuel@gmail.com> References: <1405443709-15288-1-git-send-email-asadi.samuel@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Roger Quadros 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 CC: Tero Kristo Signed-off-by: Roger Quadros Signed-off-by: Tony Lindgren Signed-off-by: sam-the-6 --- arch/arm/boot/dts/dra7-evm.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts index 4adc280..8308954 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; }; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/