linux-kernel - [PATCH V2 5/9] dt-bindings: mmc: mmci: add delay block base register for sdmmc

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Message-ID: <20200128090636.13689-6-ludovic.barre@st.com>
Date:   Tue, 28 Jan 2020 10:06:32 +0100
From:   Ludovic Barre <ludovic.barre@...com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     <srinivas.kandagatla@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Ludovic Barre <ludovic.barre@...com>
Subject: [PATCH V2 5/9] dt-bindings: mmc: mmci: add delay block base register for sdmmc

To support the sdr104 mode, the sdmmc variant has a
hardware delay block to manage the clock phase when sampling
data received by the card.

This patch adds a second base register (optional) for
sdmmc delay block.

Signed-off-by: Ludovic Barre <ludovic.barre@...com>
---
 Documentation/devicetree/bindings/mmc/mmci.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmci.txt b/Documentation/devicetree/bindings/mmc/mmci.txt
index 6d3c626e017d..4ec921e4bf34 100644
--- a/Documentation/devicetree/bindings/mmc/mmci.txt
+++ b/Documentation/devicetree/bindings/mmc/mmci.txt
@@ -28,6 +28,8 @@ specific for ux500 variant:
 - st,sig-pin-fbclk       : feedback clock signal pin used.
 
 specific for sdmmc variant:
+- reg			 : a second base register may be defined if a delay
+                           block is present and used for tuning.
 - st,sig-dir             : signal direction polarity used for cmd, dat0 dat123.
 - st,neg-edge            : data & command phase relation, generated on
                            sd clock falling edge.
-- 
2.17.1