From b5d41cb063a54d2a90e0480ede18d3b9c1ae8474 Mon Sep 17 00:00:00 2001 From: Furquan Shaikh Date: Thu, 1 Dec 2016 07:25:31 -0800 Subject: spi: Clean up SPI driver interface 1. Add new structure spi_ctrlr_buses that allows platform to define a mapping from SPI controller to buses managed by the controller. 2. Provide weak implementations of spi_init and spi_setup_slave that will be used by platforms using the new interface. BUG=chrome-os-partner:59832 BRANCH=None TEST=Compiles successfully Change-Id: Ia6f47941b786299f4d823895898ffb1b36e02f73 Signed-off-by: Furquan Shaikh Reviewed-on: https://review.coreboot.org/17561 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/include/spi-generic.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'src/include') diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h index b4a10af0c0..d28fefd026 100644 --- a/src/include/spi-generic.h +++ b/src/include/spi-generic.h @@ -42,14 +42,33 @@ struct spi_slave { * claim_bus: Claim SPI bus and prepare for communication. * release_bus: Release SPI bus. * xfer: SPI transfer + * setup: Setup given SPI device bus. */ struct spi_ctrlr { int (*claim_bus)(const struct spi_slave *slave); void (*release_bus)(const struct spi_slave *slave); int (*xfer)(const struct spi_slave *slave, const void *dout, size_t bytesout, void *din, size_t bytesin); + int (*setup)(const struct spi_slave *slave); }; +/*----------------------------------------------------------------------- + * Structure defining mapping of SPI buses to controller. + * + * ctrlr: Pointer to controller structure managing the given SPI buses. + * bus_start: Start bus number managed by the controller. + * bus_end: End bus number manager by the controller. + */ +struct spi_ctrlr_buses { + const struct spi_ctrlr *ctrlr; + unsigned int bus_start; + unsigned int bus_end; +}; + +/* Mapping of SPI buses to controllers - should be defined by platform. */ +extern const struct spi_ctrlr_buses spi_ctrlr_bus_map[]; +extern const size_t spi_ctrlr_bus_map_count; + /*----------------------------------------------------------------------- * Initialization, must be called once on start up. * -- cgit v1.2.3