linux-kernel - [PATCH v11 1/3] mmc: sdhci-msm: Qualcomm SDHCI binding documentation

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Message-Id: <1394465833-22581-2-git-send-email-gdjakov@mm-sol.com>
Date:	Mon, 10 Mar 2014 17:37:11 +0200
From:	Georgi Djakov <gdjakov@...sol.com>
To:	linux-mmc@...r.kernel.org, cjb@...top.org, ulf.hansson@...aro.org,
	devicetree@...r.kernel.org, grant.likely@...aro.org,
	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	swarren@...dotorg.org, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, rob@...dley.net
Cc:	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, Georgi Djakov <gdjakov@...sol.com>
Subject: [PATCH v11 1/3] mmc: sdhci-msm: Qualcomm SDHCI binding documentation

This patch adds the device-tree binding documentation for
Qualcomm SDHCI driver. It contains the differences between
the core properties in mmc.txt and the properties used by
the sdhci-msm driver.

Signed-off-by: Georgi Djakov <gdjakov@...sol.com>
---
 .../devicetree/bindings/mmc/sdhci-msm.txt          |   55 ++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-msm.txt

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
new file mode 100644
index 0000000..81b33b5
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -0,0 +1,55 @@
+* Qualcomm SDHCI controller (sdhci-msm)
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the sdhci-msm driver.
+
+Required properties:
+- compatible: Should contain "qcom,sdhci-msm-v4".
+- reg: Base address and length of the register in the following order:
+	- Host controller register map (required)
+	- SD Core register map (required)
+- interrupts: Should contain an interrupt-specifiers for the interrupts:
+	- Host controller interrupt (required)
+- pinctrl-names: Should contain only one value - "default".
+- pinctrl-0: Should specify pin control groups used for this controller.
+- clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock-names.
+- clock-names: Should contain the following:
+	"iface" - Main peripheral bus clock (PCLK/HCLK - AHB Bus clock) (required)
+	"core"	- SDC MMC clock (MCLK) (required)
+	"bus"	- SDCC bus voter clock (optional)
+
+Example:
+
+	sdhc_1: sdhci@...24900 {
+		compatible = "qcom,sdhci-msm-v4";
+		reg = <0xf9824900 0x11c>, <0xf9824000 0x800>;
+		interrupts = <0 123 0>;
+		bus-width = <8>;
+		non-removable;
+
+		vmmc = <&pm8941_l20>;
+		vqmmc = <&pm8941_s3>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdc1_clk &sdc1_cmd &sdc1_data>;
+
+		clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>;
+		clock-names = "core", "iface";
+	};
+
+	sdhc_2: sdhci@...a4900 {
+		compatible = "qcom,sdhci-msm-v4";
+		reg = <0xf98a4900 0x11c>, <0xf98a4000 0x800>;
+		interrupts = <0 125 0>;
+		bus-width = <4>;
+		cd-gpios = <&msmgpio 62 0x1>;
+
+		vmmc = <&pm8941_l21>;
+		vqmmc = <&pm8941_l13>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdc2_clk &sdc2_cmd &sdc2_data>;
+
+		clocks = <&gcc GCC_SDCC2_APPS_CLK>, <&gcc GCC_SDCC2_AHB_CLK>;
+		clock-names = "core", "iface";
+	};
-- 
1.7.9.5

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