diff options
Diffstat (limited to 'drivers/spi/spi_mpc83xx.c')
| -rw-r--r-- | drivers/spi/spi_mpc83xx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c index fe69e94043e1..2adf856e44c2 100644 --- a/drivers/spi/spi_mpc83xx.c +++ b/drivers/spi/spi_mpc83xx.c @@ -148,6 +148,8 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value) if (value == BITBANG_CS_ACTIVE) { u32 regval = mpc83xx_spi_read_reg(&mpc83xx_spi->base->mode); u32 len = spi->bits_per_word; + u8 pm; + if (len == 32) len = 0; else @@ -170,7 +172,7 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value) regval |= SPMODE_LEN(len); if ((mpc83xx_spi->spibrg / spi->max_speed_hz) >= 64) { - u8 pm = mpc83xx_spi->spibrg / (spi->max_speed_hz * 64); + pm = mpc83xx_spi->spibrg / (spi->max_speed_hz * 64) - 1; if (pm > 0x0f) { dev_err(&spi->dev, "Requested speed is too " "low: %d Hz. Will use %d Hz instead.\n", @@ -180,7 +182,9 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value) } regval |= SPMODE_PM(pm) | SPMODE_DIV16; } else { - u8 pm = mpc83xx_spi->spibrg / (spi->max_speed_hz * 4); + pm = mpc83xx_spi->spibrg / (spi->max_speed_hz * 4); + if (pm) + pm--; regval |= SPMODE_PM(pm); } |