OMAP_I2C_IE_REG
bits = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG);
omap->iestate = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG);
omap_i2c_write_reg(omap, OMAP_I2C_IE_REG, 0);
[OMAP_I2C_IE_REG] = 0x01,
[OMAP_I2C_IE_REG] = 0x2c,
omap_i2c_write_reg(omap, OMAP_I2C_IE_REG, omap->iestate);
u16 mask = omap_i2c_read_reg(omap, OMAP_I2C_IE_REG);