From patchwork Sat Apr 21 08:03:43 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 10354013 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AD6246019C for ; Sat, 21 Apr 2018 08:11:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E919288D4 for ; Sat, 21 Apr 2018 08:11:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 92F10288C3; Sat, 21 Apr 2018 08:11:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.4 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,RCVD_IN_SORBS_WEB autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A884288C3 for ; Sat, 21 Apr 2018 08:11:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751373AbeDUIL3 (ORCPT ); Sat, 21 Apr 2018 04:11:29 -0400 Received: from lucky1.263xmail.com ([211.157.147.134]:44581 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751370AbeDUIL1 (ORCPT ); Sat, 21 Apr 2018 04:11:27 -0400 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.41]) by lucky1.263xmail.com (Postfix) with ESMTP id 583908F37; Sat, 21 Apr 2018 16:11:19 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTPA id AD67E3A3; Sat, 21 Apr 2018 16:11:18 +0800 (CST) X-IP-DOMAINF: 1 X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: ulf.hansson@linaro.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: shawn.lin@rock-chips.com X-UNIQUE-TAG: <24ba4fdcb1a46109eb91306440eb79ad> X-ATTACHMENT-NUM: 0 X-SENDER: lintao@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 296900510TY; Sat, 21 Apr 2018 16:11:19 +0800 (CST) From: Shawn Lin To: Ulf Hansson Cc: Rob Herring , Jaehoon Chung , Wolfram Sang , Adrian Hunter , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Shawn Lin Subject: [PATCH 1/2] Documentation: mmc: add description for power-delay-ms Date: Sat, 21 Apr 2018 16:03:43 +0800 Message-Id: <1524297824-94236-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.9.1 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP power-delay-ms woule be used to substitute the hard-coded 10ms delay waiting for power supply to be stable, specificed by individual platform/board. Default to 10ms as before, if no available. Signed-off-by: Shawn Lin --- Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 467cd7b..8db2ba0 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -56,6 +56,8 @@ Optional properties: - fixed-emmc-driver-type: for non-removable eMMC, enforce this driver type. The value is the driver type as specified in the eMMC specification (table 206 in spec version 5.1). +- power-delay-ms: Tunable delay waiting for I/O signalling and card power supply + to be stable. Default to 10ms if no available. *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line polarity properties, we have to fix the meaning of the "normal" and "inverted"