From: Thomas Chou thomas@wytron.com.tw
This func helps mmc_spi driver set correct speed for mmc/sd, as mmc card needs 400KHz clock for spi mode initialization.
Signed-off-by: Thomas Chou thomas@wytron.com.tw Signed-off-by: Mike Frysinger vapier@gentoo.org --- include/spi.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/include/spi.h b/include/spi.h index 320e50e..7887d0f 100644 --- a/include/spi.h +++ b/include/spi.h @@ -176,6 +176,14 @@ void spi_cs_activate(struct spi_slave *slave); void spi_cs_deactivate(struct spi_slave *slave);
/*----------------------------------------------------------------------- + * Set transfer speed. + * This sets a new speed to be applied for next spi_xfer(). + * slave: The SPI slave + * hz: The transfer speed + */ +void spi_set_speed(struct spi_slave *slave, uint hz); + +/*----------------------------------------------------------------------- * Write 8 bits, then read 8 bits. * slave: The SPI slave we're communicating with * byte: Byte to be written