diff options
| -rw-r--r-- | drivers/spi/spi-rzv2h-rspi.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/spi/spi-rzv2h-rspi.c b/drivers/spi/spi-rzv2h-rspi.c index f02f25b98ec6..d7719f3c7b13 100644 --- a/drivers/spi/spi-rzv2h-rspi.c +++ b/drivers/spi/spi-rzv2h-rspi.c @@ -81,6 +81,7 @@ struct rzv2h_rspi_priv { struct clk *tclk; wait_queue_head_t wait; unsigned int bytes_per_word; + u32 last_speed_hz; u32 freq; u16 status; u8 spr; @@ -298,9 +299,13 @@ static int rzv2h_rspi_prepare_message(struct spi_controller *ctlr, rspi->bytes_per_word = roundup_pow_of_two(BITS_TO_BYTES(bits_per_word)); - rspi->freq = rzv2h_rspi_setup_clock(rspi, speed_hz); - if (!rspi->freq) - return -EINVAL; + if (speed_hz != rspi->last_speed_hz) { + rspi->freq = rzv2h_rspi_setup_clock(rspi, speed_hz); + if (!rspi->freq) + return -EINVAL; + + rspi->last_speed_hz = speed_hz; + } writeb(rspi->spr, rspi->base + RSPI_SPBR); |