From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: [PATCH v2 1/3] dt-bindings: mmc: describe new eMMC binding for fixed driver type Date: Wed, 4 Oct 2017 19:39:18 +0200 Message-ID: <20171004173920.15232-2-wsa+renesas@sang-engineering.com> References: <20171004173920.15232-1-wsa+renesas@sang-engineering.com> Return-path: In-Reply-To: <20171004173920.15232-1-wsa+renesas@sang-engineering.com> Sender: linux-renesas-soc-owner@vger.kernel.org To: linux-mmc@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Simon Horman , Adrian Hunter , Marek Vasut , Wolfram Sang , devicetree@vger.kernel.org, Rob Herring List-Id: linux-mmc@vger.kernel.org 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 Cc: devicetree@vger.kernel.org --- Changes since RFC v1: * rebased to mmc/next based on 4.14-rc3 * proper prefix for subject * added Rob's ack 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