diff options
| author | Furquan Shaikh <furquan@chromium.org> | 2016-12-01 07:25:31 -0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-12-07 20:19:07 +0100 |
| commit | b5d41cb063a54d2a90e0480ede18d3b9c1ae8474 (patch) | |
| tree | c0a34038912a8aa8d8eae9a20ee5cbadb6dc067e /src/include | |
| parent | 2dc8b77d0e95dbb90a99ff5dc2b162b805faba18 (diff) | |
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 <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17561
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/spi-generic.h | 19 |
1 files changed, 19 insertions, 0 deletions
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 @@ -42,15 +42,34 @@ 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. * */ |