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 --- v2 remove weak func as Mike suggested. v3 comment style fix as Wolfgang suggested.
include/spi.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/include/spi.h b/include/spi.h index 320e50e..e364d2d 100644 --- a/include/spi.h +++ b/include/spi.h @@ -175,6 +175,14 @@ 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