i2c-msm-v2: Add snapshot of I2C MSM V2 driver

Qualcomm I2C controller

Required properties:

 - reg : Offset and length of the register region for the device named in

	reg-names and has the same index.

 - reg-names : Register region name(s) referenced in reg above

	"qup_phys_addr" : Physical address of QUP register space.

 - compatible : should be "qcom,i2c-msm-v2"

 - interrupts : Interrupt number which correspond to the entry with the same

	index in interrupt-names.

 - interrupt-names: QUP core interrupt name(s) referenced in interrupts above

	"qup_irq" : QUP interrupt used by the controller.

 - dmas : DMA engine API's parameters for blsp.

	<[phandle of the dma controller] [pipe index] [number of descriptors]

				[sps_connect flags] [sps_register_event flags]>;

 - dma-names :  dma channel names.

 - qcom,clk-freq-out : Desired I2C bus clock frequency in Hz

 - qcom,clk-freq-in  : Supplied core clock frequency in Hz.

Required alias:

 - The desired bus-number is specified by an alias with the following format:

	'i2c{n}' where n is the bus number.

Optional property:

 - qcom,noise-rjct-scl : number of low samples on clock line to consider it low.

	When missing default to 0.

 - qcom,noise-rjct-sda : number of low samples on data  line to consider it low.

	When missing default to 0.

 - qcom,disable-dma : disables DMA transfer mode.

 - qcom,master-id : Master-port value used on voting for the clock path.

 - qcom,high-time-clk-div : high time divider value to configure clk-ctl

	register. When missing, default to the value given in driver.

 - qcom,fs-clk-div: fs divider value to configure clk-ctl register. When

	missing, default to the value given in driver.

Example:

	aliases {

		i2c10 = &i2c_10;

	};

	i2c_10: i2c@f9966000 {

		compatible = "qcom,i2c-msm-v2";

		reg-names = "qup_phys_addr", "dma_phys_addr";

		reg = <0xf9966000 0x1000>;

		interrupt-names = "qup_irq";

		interrupts = <0 104 0>;

		dmas = <&dma_blsp1 14 32 0x20000020 0x20>,

			<&dma_blsp1 15 64 0x20000020 0x20>;

		dma-names = "tx", "rx";

		qcom,clk-freq-out = <100000>;

		qcom,clk-freq-in  = <24000000>;

		qcom,noise-rjct-scl = <0>;

		qcom,noise-rjct-sda = <0>;

	};

	  This driver can also be built as a module. If so, the module will be

	  called as i2c-opal.

config I2C_MSM_V2

        tristate "I2C_MSM_V2"

        depends on ARCH_QCOM

        help

          If you say yes to this option, support will be included for the

          built-in I2C interface and its DMA engine on the MSM family

          processors.

          This driver can also be built as a module.  If so, the module

          will be called i2c-msm-v2.

endmenu

obj-$(CONFIG_I2C_XLR)		+= i2c-xlr.o

obj-$(CONFIG_I2C_XLP9XX)	+= i2c-xlp9xx.o

obj-$(CONFIG_I2C_RCAR)		+= i2c-rcar.o

obj-$(CONFIG_I2C_MSM_V2)        += i2c-msm-v2.o

# External I2C/SMBus adapter drivers

obj-$(CONFIG_I2C_DIOLAN_U2C)	+= i2c-diolan-u2c.o