Hello Ahmad, On Thu, Aug 01, 2024 at 11:50:17AM +0200, Ahmad Fatoum wrote: > On 01.08.24 00:35, Uwe Kleine-König wrote: > > +CONFIG_PINCTRL_MCP23S08_I2C=y > > +CONFIG_PINCTRL_MCP23S08_SPI=y > > Nit: We don't seem to actually need the SPI driver. PINCTRL_MCP23S08_SPI wasn't explicitly enabled. That's a hidden symbol enabled by config PINCTRL_MCP23S08 ... select PINCTRL_MCP23S08_SPI if SPI_MASTER . So not enabling this would require a kernel patch to make the SPI variant explicitly selectable. Best regards Uwe