R511_I2C_CTL
reg_w(sd, R511_I2C_CTL, 0x01);
rc = reg_r(sd, R511_I2C_CTL);
reg_w(sd, R511_I2C_CTL, 0x03);
rc = reg_r(sd, R511_I2C_CTL);
reg_w(sd, R511_I2C_CTL, 0x10);
reg_w(sd, R511_I2C_CTL, 0x05);
rc = reg_r(sd, R511_I2C_CTL);
reg_w(sd, R511_I2C_CTL, 0x10);
reg_w(sd, R511_I2C_CTL, 0x05);