From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sauhun.de ([88.99.104.3]:46246 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750836AbdJOMq1 (ORCPT ); Sun, 15 Oct 2017 08:46:27 -0400 From: Wolfram Sang To: linux-mmc@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Simon Horman , Wolfram Sang , Rob Herring Subject: [PATCH v3 1/3] dt-bindings: mmc: describe new eMMC binding for fixed driver type Date: Sun, 15 Oct 2017 14:46:13 +0200 Message-Id: <20171015124615.31391-2-wsa+renesas@sang-engineering.com> In-Reply-To: <20171015124615.31391-1-wsa+renesas@sang-engineering.com> References: <20171015124615.31391-1-wsa+renesas@sang-engineering.com> Sender: linux-renesas-soc-owner@vger.kernel.org List-ID: Some boards may have to use a certain driver type (or drive strength) to achieve stable eMMC communication. Describe a binding to set this up via DT. Signed-off-by: Wolfram Sang Acked-by: Rob Herring --- no changes since v2 Documentation/devicetree/bindings/mmc/mmc.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index b32ade645ad97c..94a90b49a6925d 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -53,6 +53,9 @@ Optional properties: - no-sdio: controller is limited to send sdio cmd during initialization - no-sd: controller is limited to send sd cmd during initialization - no-mmc: controller is limited to send mmc cmd during initialization +- 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). *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" -- 2.11.0