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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 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl,sdio-async-interrupt-enabled binding
Date: Mon, 16 Aug 2021 20:38:25 +0800	[thread overview]
Message-ID: <1629117508-4886-3-git-send-email-haibo.chen@nxp.com> (raw)
In-Reply-To: <1629117508-4886-1-git-send-email-haibo.chen@nxp.com>

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

Add a new fsl,sdio-async-interrupt-enabled binding for sdio devices
which enable the async interrupt function. When get this property,
driver will avoid to use DAT[1] for hardware auto tuning check.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.yaml         | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index b5baf439fbac..8a9f1775b0e2 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -122,6 +122,16 @@ properties:
       - const: state_200mhz
       - const: sleep
 
+  fsl,sdio-async-interrupt-enabled:
+    description: |
+      Recommend for SDIO cards that enables SDIO async interrupt for SDR104 and SDR50
+      operating modes. SDIO async interrupt uses DAT[1] to signal the card's interrupt.
+      uSDHC tuning mechanism must use DAT[0] and CMD signals to avoid a possible
+      conflict and incorrect delay line calculated by the uSDHC auto tuning mechanism.
+      Enabling this device tree property is only recommended for layouts that are
+      matching the SD interface length.
+    type: boolean
+
 required:
   - compatible
   - reg
-- 
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 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl, sdio-async-interrupt-enabled binding
Date: Mon, 16 Aug 2021 20:38:25 +0800	[thread overview]
Message-ID: <1629117508-4886-3-git-send-email-haibo.chen@nxp.com> (raw)
In-Reply-To: <1629117508-4886-1-git-send-email-haibo.chen@nxp.com>

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

Add a new fsl,sdio-async-interrupt-enabled binding for sdio devices
which enable the async interrupt function. When get this property,
driver will avoid to use DAT[1] for hardware auto tuning check.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 .../devicetree/bindings/mmc/fsl-imx-esdhc.yaml         | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index b5baf439fbac..8a9f1775b0e2 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -122,6 +122,16 @@ properties:
       - const: state_200mhz
       - const: sleep
 
+  fsl,sdio-async-interrupt-enabled:
+    description: |
+      Recommend for SDIO cards that enables SDIO async interrupt for SDR104 and SDR50
+      operating modes. SDIO async interrupt uses DAT[1] to signal the card's interrupt.
+      uSDHC tuning mechanism must use DAT[0] and CMD signals to avoid a possible
+      conflict and incorrect delay line calculated by the uSDHC auto tuning mechanism.
+      Enabling this device tree property is only recommended for layouts that are
+      matching the SD interface length.
+    type: boolean
+
 required:
   - compatible
   - reg
-- 
2.17.1


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  parent reply	other threads:[~2021-08-16 13:00 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-16 12:38 [PATCH 1/6] mmc: sdhci-esdhc-imx: remove redundant code for manual tuning haibo.chen
2021-08-16 12:38 ` haibo.chen
2021-08-16 12:38 ` [PATCH 2/6] mmc: sdhci-eadhc-imx: select the correct mode for auto tuning haibo.chen
2021-08-16 12:38   ` haibo.chen
2021-08-16 12:38 ` haibo.chen [this message]
2021-08-16 12:38   ` [PATCH 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl, sdio-async-interrupt-enabled binding haibo.chen
2021-08-16 13:43   ` [PATCH 3/6] dt-bindings: mmc: fsl-imx-esdhc: add fsl,sdio-async-interrupt-enabled binding Ulf Hansson
2021-08-16 13:43     ` Ulf Hansson
2021-08-17  6:41     ` Bough Chen
2021-08-17  6:41       ` Bough Chen
2021-08-17  7:37       ` Ulf Hansson
2021-08-17  7:37         ` Ulf Hansson
2021-08-16 12:38 ` [PATCH 4/6] mmc: host: sdhci-esdhc-imx.c: correct the auto-tuning setting for sdio device haibo.chen
2021-08-16 12:38   ` haibo.chen
2021-08-16 13:53   ` Ulf Hansson
2021-08-16 13:53     ` Ulf Hansson
2021-08-17  6:57     ` Bough Chen
2021-08-17  6:57       ` Bough Chen
2021-08-17  8:00       ` Ulf Hansson
2021-08-17  8:00         ` Ulf Hansson
2021-08-17 12:29         ` Bough Chen
2021-08-17 12:29           ` Bough Chen
2021-08-16 12:38 ` [PATCH 5/6] arm64: dts: imx8mm-evk: add sdio wifi support haibo.chen
2021-08-16 12:38   ` haibo.chen
2021-08-16 12:38 ` [PATCH 6/6] arm64: dts: imx8mn-evk: " haibo.chen
2021-08-16 12:38   ` haibo.chen
2021-08-24 13:52 ` [PATCH 1/6] mmc: sdhci-esdhc-imx: remove redundant code for manual tuning Ulf Hansson
2021-08-24 13:52   ` Ulf Hansson
2021-08-25  2:16   ` Bough Chen
2021-08-25  2:16     ` Bough Chen
2021-08-25  9:22     ` Ulf Hansson
2021-08-25  9:22       ` Ulf Hansson

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