From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932121AbdHUQIR (ORCPT ); Mon, 21 Aug 2017 12:08:17 -0400 Received: from mail-wr0-f170.google.com ([209.85.128.170]:35761 "EHLO mail-wr0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754405AbdHUQGq (ORCPT ); Mon, 21 Aug 2017 12:06:46 -0400 From: Jerome Brunet To: Kevin Hilman , Carlo Caione Cc: Jerome Brunet , linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/9] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times Date: Mon, 21 Aug 2017 18:06:32 +0200 Message-Id: <20170821160637.22456-5-jbrunet@baylibre.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20170821160637.22456-1-jbrunet@baylibre.com> References: <20170821160637.22456-1-jbrunet@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changing the card voltage on the nanopi-k2 is not instantaneous, especially when switching from 3.3v to 1.8v. It take at least 3ms for the regulator to go from 3.3v to 1.8v. Add margin to that to make sure we don't upset the sdcard during the voltage switch Fixes: 9bc7ffb08daf ("arm64: dts: amlogic: Add NanoPi K2") Signed-off-by: Jerome Brunet --- arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts index e4c6b2fd52ee..de4ed28d78bc 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts @@ -107,6 +107,9 @@ states = <3300000 0>, <1800000 1>; + + regulator-settling-time-up-us = <100>; + regulator-settling-time-down-us = <5000>; }; wifi_32k: wifi-32k { -- 2.9.5