On Fri, May 11, 2018 at 01:38:18PM +0300, Radu Pirea wrote: > This mfd driver is just a wrapper over atmel_serial driver and > spi-at91-usart driver. Selection of one of the drivers is based on a > property from device tree. If the property is not specified, the default > driver is atmel_serial. > > Signed-off-by: Radu Pirea <radu.pi...@microchip.com> > --- > drivers/mfd/Kconfig | 10 ++++ > drivers/mfd/Makefile | 1 + > drivers/mfd/at91-usart.c | 75 ++++++++++++++++++++++++++++ > include/dt-bindings/mfd/at91-usart.h | 17 +++++++ > 4 files changed, 103 insertions(+) > create mode 100644 drivers/mfd/at91-usart.c > create mode 100644 include/dt-bindings/mfd/at91-usart.h >
> +#ifndef __DT_BINDINGS_AT91_USART_H__ > +#define __DT_BINDINGS_AT91_USART_H__ > + > +#define AT91_USART_MODE_SERIAL 1 > +#define AT91_USART_MODE_SPI 2 Won't this require a DT update for serial mode to add the mode property? That breaks compatibility. Rob
