> >> -struct oa_tc6 *oa_tc6_init(struct spi_device *spi, bool prote) > >> +struct oa_tc6 *oa_tc6_init(struct spi_device *spi) > > > > Was there a reason to have prote initially, and then remove it here? > The reason is, control communication uses "protect". But in the first > patch there was no dt used. Later in this patch, dt used for all the > configuration parameters and this also part of that. That's why removed > and moved this to dt configuration. > > What's your opinion? shall I keep as it is like this? or remove the > protect in the first two patches and introduce in this patch? It will actually depend on what goes into the DT binding. If using protections costs very little, i would just hard code it on. Maybe you can run some iperf tests and see if it makes a measurable difference. How fast an SPI bus are you using on your development board? If you have a 50Mbps SPI bus, it does not even matter, since the media bandwidth is just 10Mbps. Andrew