mmc: host: add SDHCI platform driver for msm chipsets

new file mode 100644
index 0000000..f42bea2
@@ -0,0 +1,49 @@
+Qualcomm Standard Secure Digital Host Controller (SDHC)
+
+Secure Digital Host Controller provides standard host interface to SD/MMC/SDIO cards.
+
+Required properties:
+  - compatible : should be "qcom,sdhci-msm"
+  - reg : should contain SDHC, SD Core register map.
+  - reg-names : indicates various resources passed to driver (via reg proptery) by name.
+  "reg-names" examples are "hc_mem" and "core_mem"
+  - interrupts : should contain SDHC interrupts.
+  - interrupt-names : indicates interrupts passed to driver (via interrupts property) by name.
+  "interrupt-names" examples are "hc_irq" and "pwr_irq"
+  - <supply-name>-supply: phandle to the regulator device tree node
+  "supply-name" examples are "vdd", "vdd-io".
+
+Optional Properties:
+	- cell-index - defines slot ID.
+	- qcom,bus-width - defines the bus I/O width that controller supports.
+	- qcom,nonremovable - specifies whether the card in slot is
+				hot pluggable or hard wired.
+	- qcom,bus-speed-mode - specifies supported bus speed modes by host.
+	- qcom,current-limit - specifies max. current the host can drive.
+
+In the following, <supply> can be vdd (flash core voltage) or vdd-io (I/O voltage).
+	- qcom,<supply>-always_on - specifies whether supply should be kept "on" always.
+	- qcom,<supply>-lpm_sup - specifies whether supply can be kept in low power mode (lpm).
+	- qcom,<supply>-voltage_level - specifies voltage levels for supply. Should be
+	specified in pairs (min, max), units uV.
+	- qcom,<supply>-current_level - specifies load levels for supply in lpm or
+	high power mode (hpm). Should be specified in pairs (lpm, hpm), units uA.
+
+	- gpios - specifies gpios assigned for sdhc slot.
+	- qcom,gpio-names -  a list of strings that map in order to the list of gpios
+
+	- qcom,max-clk-rate - specifies the max. clock rate supported for a particular slot.
+
+Example:
+
+	qcom,sdhc@f9824900 {
+		cell-index = <1>;		// SDC1 used as eMMC slot
+		compatible = "qcom,sdhci-msm";
+		reg = <0xf9824900 0x11C>,	// SDHC register interface
+			<0xf9824000 0x800>	// SD Core register interface
+
+		interrupts = <0 123 0>,		// Core interrupt
+				<0 138 0>;	// Pwr interrupt
+		qcom,sdcc-bus-width = <8>;	// 8-bit wide
+		qcom,sdcc-nonremovable;
+	};

index da38122..2c1e11a 100644
@@ -458,6 +458,19 @@ config MMC_SDRICOH_CS
 config MMC_TMIO_CORE
 	tristate
 
+config MMC_SDHCI_MSM
+	tristate "Qualcomm SDHCI Controller Support"
+	depends on ARCH_MSM
+	depends on MMC_SDHCI_PLTFM
+	help
+	  This selects the Secure Digital Host Controller Interface (SDHCI)
+	  support present in MSM SOCs from Qualcomm. The controller
+	  supports SD/MMC/SDIO devices.
+
+	  If you have a controller with this interface, say Y or M here.
+
+	  If unsure, say N.
+
 config MMC_MSM
 	tristate "Qualcomm SDCC Controller Support"
 	depends on MMC && ARCH_MSM

index 843ce06..c0232fa 100644
@@ -56,6 +56,7 @@ obj-$(CONFIG_MMC_SDHCI_DOVE)		+= sdhci-dove.o
 obj-$(CONFIG_MMC_SDHCI_TEGRA)		+= sdhci-tegra.o
 obj-$(CONFIG_MMC_SDHCI_OF_ESDHC)	+= sdhci-of-esdhc.o
 obj-$(CONFIG_MMC_SDHCI_OF_HLWD)		+= sdhci-of-hlwd.o
+obj-$(CONFIG_MMC_SDHCI_MSM)		+= sdhci-msm.o
 
 ifeq ($(CONFIG_CB710_DEBUG),y)
 	CFLAGS-cb710-mmc	+= -DDEBUG