linux-kernel - [PATCH V2 2/8] dt-bindings: mmc: Add information for DLL register properties

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Date:   Fri, 22 May 2020 15:02:24 +0530
From:   Sarthak Garg <sartgarg@...eaurora.org>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     vbadigan@...eaurora.org, stummala@...eaurora.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Sarthak Garg <sartgarg@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS)
Subject: [PATCH V2 2/8] dt-bindings: mmc: Add information for DLL register properties

Add information regarding DLL register properties for getting board
specific configurations. These DLL register settings may vary from
board to board.

Signed-off-by: Sarthak Garg <sartgarg@...eaurora.org>
---
 Documentation/devicetree/bindings/mmc/sdhci-msm.txt | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 481f692f..b8e1d2b 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -47,6 +47,13 @@ Required properties:
 	"cal"	- reference clock for RCLK delay calibration (optional)
 	"sleep"	- sleep clock for RCLK delay calibration (optional)
 
+- qcom,ddr-config: Certain chipsets and platforms require particular settings
+	for the DDR_CONFIG register. Use this field to specify the register
+	value as per the Hardware Programming Guide.
+
+- qcom,dll-config: Chipset and Platform specific value. Use this field to
+	specify the DLL_CONFIG register value as per Hardware Programming Guide.
+
 Example:
 
 	sdhc_1: sdhci@...24900 {
@@ -64,6 +71,9 @@ Example:
 
 		clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>;
 		clock-names = "core", "iface";
+
+		qcom,dll-config = <0x000f642c>;
+		qcom,ddr-config = <0x80040868>;
 	};
 
 	sdhc_2: sdhci@...a4900 {
@@ -81,4 +91,7 @@ Example:
 
 		clocks = <&gcc GCC_SDCC2_APPS_CLK>, <&gcc GCC_SDCC2_AHB_CLK>;
 		clock-names = "core", "iface";
+
+		qcom,dll-config = <0x0007642c>;
+		qcom,ddr-config = <0x80040868>;
 	};
-- 
2.7.4