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From: haibo.chen@nxp.com
To: adrian.hunter@intel.com, ulf.hansson@linaro.org,
	shawnguo@kernel.org, robh+dt@kernel.org, s.hauer@pengutronix.de
Cc: kernel@pengutronix.de, festevam@gmail.com,
	linux-mmc@vger.kernel.org, linux-imx@nxp.com, haibo.chen@nxp.com,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl,broken-auto-tuning binding
Date: Wed, 18 Aug 2021 19:16:52 +0800	[thread overview]
Message-ID: <1629285415-7495-3-git-send-email-haibo.chen@nxp.com> (raw)
In-Reply-To: <1629285415-7495-1-git-send-email-haibo.chen@nxp.com>

From: Haibo Chen <haibo.chen@nxp.com>

Add a new fsl,broken-auto-tuning binding for sdio devices. When sdio
device support sdio interrupt, need to use this property to disable
auto-tuning. Auto-tuning circuit is conflict with sdio interrupt.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index b5baf439fbac..d7c8e5880473 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -93,6 +93,15 @@ properties:
       tuning step can't find the proper delay window within limited tuning retries.
     default: 0
 
+  fsl,broken-auto-tuning:
+    description: |
+      Recommend for SDIO cards that enables SDIO interrupt for SDR104 and SDR50 mode.
+      SDIO interrupt uses DAT[1] to signal the card's interrupt. Auto-tuning circuit
+      will detect this interrupt on DAT[1] when in 4Bit bus mode, and take it just
+      as normal data, wrongly adjust the delay cell. This property is used to disable
+      the auto-tuning function.
+    type: boolean
+
   fsl,strobe-dll-delay-target:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: |
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: haibo.chen@nxp.com
To: adrian.hunter@intel.com, ulf.hansson@linaro.org,
	shawnguo@kernel.org, robh+dt@kernel.org, s.hauer@pengutronix.de
Cc: kernel@pengutronix.de, festevam@gmail.com,
	linux-mmc@vger.kernel.org, linux-imx@nxp.com, haibo.chen@nxp.com,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl, broken-auto-tuning binding
Date: Wed, 18 Aug 2021 19:16:52 +0800	[thread overview]
Message-ID: <1629285415-7495-3-git-send-email-haibo.chen@nxp.com> (raw)
In-Reply-To: <1629285415-7495-1-git-send-email-haibo.chen@nxp.com>

From: Haibo Chen <haibo.chen@nxp.com>

Add a new fsl,broken-auto-tuning binding for sdio devices. When sdio
device support sdio interrupt, need to use this property to disable
auto-tuning. Auto-tuning circuit is conflict with sdio interrupt.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index b5baf439fbac..d7c8e5880473 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -93,6 +93,15 @@ properties:
       tuning step can't find the proper delay window within limited tuning retries.
     default: 0
 
+  fsl,broken-auto-tuning:
+    description: |
+      Recommend for SDIO cards that enables SDIO interrupt for SDR104 and SDR50 mode.
+      SDIO interrupt uses DAT[1] to signal the card's interrupt. Auto-tuning circuit
+      will detect this interrupt on DAT[1] when in 4Bit bus mode, and take it just
+      as normal data, wrongly adjust the delay cell. This property is used to disable
+      the auto-tuning function.
+    type: boolean
+
   fsl,strobe-dll-delay-target:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: |
-- 
2.17.1


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  parent reply	other threads:[~2021-08-18 11:38 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-18 11:16 [PATCH v2 1/6] mmc: sdhci-esdhc-imx: remove redundant code for manual tuning haibo.chen
2021-08-18 11:16 ` haibo.chen
2021-08-18 11:16 ` [PATCH v2 2/6] mmc: sdhci-eadhc-imx: select the correct mode for auto tuning haibo.chen
2021-08-18 11:16   ` haibo.chen
2021-08-18 11:16 ` haibo.chen [this message]
2021-08-18 11:16   ` [PATCH v2 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl, broken-auto-tuning binding haibo.chen
2021-08-18 18:48   ` [PATCH v2 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl,broken-auto-tuning binding Rob Herring
2021-08-18 18:48     ` Rob Herring
2021-08-19 14:11   ` [PATCH v2 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl, broken-auto-tuning binding Lucas Stach
2021-08-19 14:11     ` Lucas Stach
2021-08-18 11:16 ` [PATCH v2 4/6] mmc: host: sdhci-esdhc-imx.c: disable auto-tuning when necessary haibo.chen
2021-08-18 11:16   ` haibo.chen
2022-12-05 14:59   ` Kevin Groeneveld
2022-12-05 14:59     ` Kevin Groeneveld
2022-12-09  8:43     ` Bough Chen
2022-12-09  8:43       ` Bough Chen
2021-08-18 11:16 ` [PATCH v2 5/6] arm64: dts: imx8mm-evk: add sdio wifi support haibo.chen
2021-08-18 11:16   ` haibo.chen
2021-08-18 11:16 ` [PATCH v2 6/6] arm64: dts: imx8mn-evk: " haibo.chen
2021-08-18 11:16   ` haibo.chen

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