PCA9541_CONTROL
reg = pca9541_reg_read(client, PCA9541_CONTROL);
pca9541_reg_write(client, PCA9541_CONTROL,
reg = pca9541_reg_read(client, PCA9541_CONTROL);
PCA9541_CONTROL,
PCA9541_CONTROL,
PCA9541_CONTROL,
PCA9541_CONTROL,