Here is a list of all variables with links to the structures/unions they belong to:

chip_select : digipot10_s
cs : digipot10_cfg_t
cs_polarity : digipot10_cfg_t
drv_sel : digipot10_cfg_t, digipot10_s
i2c : digipot10_s
i2c_address : digipot10_cfg_t
i2c_speed : digipot10_cfg_t
miso : digipot10_cfg_t
mosi : digipot10_cfg_t
read_f : digipot10_s
sck : digipot10_cfg_t
scl : digipot10_cfg_t
sda : digipot10_cfg_t
slave_address : digipot10_s
spi : digipot10_s
spi_mode : digipot10_cfg_t
spi_speed : digipot10_cfg_t
write_f : digipot10_s