diff options
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ea39d1a..7ddea9b 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -5,9 +5,22 @@ */ #include <common.h> +#include <fdtdec.h> #include <malloc.h> #include <spi.h> +int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen) +{ + if (wordlen == 0 || wordlen > 32) { + printf("spi: invalid wordlen %d\n", wordlen); + return -1; + } + + slave->wordlen = wordlen; + + return 0; +} + void *spi_do_alloc_slave(int offset, int size, unsigned int bus, unsigned int cs) { @@ -20,7 +33,26 @@ void *spi_do_alloc_slave(int offset, int size, unsigned int bus, slave = (struct spi_slave *)(ptr + offset); slave->bus = bus; slave->cs = cs; + slave->wordlen = SPI_DEFAULT_WORDLEN; } return ptr; } + +#ifdef CONFIG_OF_SPI +struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum, + int node) +{ + int cs, max_hz, mode = 0; + + cs = fdtdec_get_int(blob, node, "reg", -1); + max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000); + if (fdtdec_get_bool(blob, node, "spi-cpol")) + mode |= SPI_CPOL; + if (fdtdec_get_bool(blob, node, "spi-cpha")) + mode |= SPI_CPHA; + if (fdtdec_get_bool(blob, node, "spi-cs-high")) + mode |= SPI_CS_HIGH; + return spi_setup_slave(busnum, cs, max_hz, mode); +} +#endif |