[PATCHv3 1/6] i2c: sunxi: Add Allwinner A1X i2c driver

[Wolfram Sang]

> +#define SUNXI_I2C_ADDR_REG		(0x00)
> +#define SUNXI_I2C_ADDR_ADDR(v)			((v & 0x7f) << 1)
> +#define SUNXI_I2C_XADDR_REG		(0x04)
> +#define SUNXI_I2C_DATA_REG		(0x08)
> +#define SUNXI_I2C_CNTR_REG		(0x0c)
> +#define SUNXI_I2C_CNTR_ASSERT_ACK		BIT(2)
> +#define SUNXI_I2C_CNTR_INT_FLAG			BIT(3)
> +#define SUNXI_I2C_CNTR_MASTER_STOP		BIT(4)
> +#define SUNXI_I2C_CNTR_MASTER_START		BIT(5)
> +#define SUNXI_I2C_CNTR_BUS_ENABLE		BIT(6)
> +#define SUNXI_I2C_CNTR_INT_ENABLE		BIT(7)
> +#define SUNXI_I2C_STA_REG		(0x10)
> +#define SUNXI_I2C_STA_BUS_ERROR			(0x00)
> +#define SUNXI_I2C_STA_START			(0x08)
> +#define SUNXI_I2C_STA_START_REPEAT		(0x10)
> +#define SUNXI_I2C_STA_MASTER_WADDR_ACK		(0x18)
> +#define SUNXI_I2C_STA_MASTER_WADDR_NAK		(0x20)
> +#define SUNXI_I2C_STA_MASTER_DATA_SENT_ACK	(0x28)
> +#define SUNXI_I2C_STA_MASTER_DATA_SENT_NAK	(0x30)
> +#define SUNXI_I2C_STA_MASTER_RADDR_ACK		(0x40)
> +#define SUNXI_I2C_STA_MASTER_RADDR_NAK		(0x48)
> +#define SUNXI_I2C_STA_MASTER_DATA_RECV_ACK	(0x50)
> +#define SUNXI_I2C_STA_MASTER_DATA_RECV_NAK	(0x58)
> +#define SUNXI_I2C_CCR_REG		(0x14)
> +#define SUNXI_I2C_CCR_DIV_N(val)		(val & 0x3)
> +#define SUNXI_I2C_CCR_DIV_M(val)		((val & 0xf) << 3)
> +#define SUNXI_I2C_SRST_REG		(0x18)
> +#define SUNXI_I2C_SRST_RESET			BIT(0)
> +#define SUNXI_I2C_EFR_REG		(0x1c)
> +#define SUNXI_I2C_LCR_REG		(0x20)
> +
> +#define SUNXI_I2C_DONE			BIT(0)
> +#define SUNXI_I2C_ERROR			BIT(1)
> +#define SUNXI_I2C_NAK			BIT(2)
> +#define SUNXI_I2C_BUS_ERROR		BIT(3)

The register set looks similar to i2c-mv64xxx.c. Has it been considered
to merge the two drivers?

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