diff options
Diffstat (limited to 'src/drivers/spi/spi-generic.c')
-rw-r--r-- | src/drivers/spi/spi-generic.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/drivers/spi/spi-generic.c b/src/drivers/spi/spi-generic.c new file mode 100644 index 0000000000..7398ee928f --- /dev/null +++ b/src/drivers/spi/spi-generic.c @@ -0,0 +1,43 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <spi-generic.h> +#include <string.h> + +int spi_claim_bus(const struct spi_slave *slave) +{ + const struct spi_ctrlr *ctrlr = slave->ctrlr; + if (ctrlr && ctrlr->claim_bus) + return ctrlr->claim_bus(slave); + return 0; +} + +void spi_release_bus(const struct spi_slave *slave) +{ + const struct spi_ctrlr *ctrlr = slave->ctrlr; + if (ctrlr && ctrlr->release_bus) + ctrlr->release_bus(slave); +} + +int spi_xfer(const struct spi_slave *slave, const void *dout, size_t bytesout, + void *din, size_t bytesin) +{ + const struct spi_ctrlr *ctrlr = slave->ctrlr; + if (ctrlr && ctrlr->xfer) + return ctrlr->xfer(slave, dout, bytesout, din, bytesin); + + return -1; +} |