I2C_MHL
[I2C_MHL] = "MHL",
sii9234_writeb(sii9234, I2C_MHL, offset, value)
sii9234_writebm(sii9234, I2C_MHL, offset, value, mask)
sii9234_readb(sii9234, I2C_MHL, offset)
ctx->client[I2C_MHL] = client;