diff options
Diffstat (limited to 'drivers/spi/omap3_spi.c')
| -rw-r--r-- | drivers/spi/omap3_spi.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c index 1cbb5d46fd..ff7b55f870 100644 --- a/drivers/spi/omap3_spi.c +++ b/drivers/spi/omap3_spi.c @@ -347,20 +347,28 @@ static void _omap3_spi_set_wordlen(struct omap3_spi_priv *priv) omap3_spi_write_chconf(priv, confr); } -static void spi_reset(struct mcspi *regs) +static void spi_reset(struct omap3_spi_priv *priv) { unsigned int tmp; - writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, ®s->sysconfig); + writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, &priv->regs->sysconfig); do { - tmp = readl(®s->sysstatus); + tmp = readl(&priv->regs->sysstatus); } while (!(tmp & OMAP3_MCSPI_SYSSTATUS_RESETDONE)); writel(OMAP3_MCSPI_SYSCONFIG_AUTOIDLE | OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP | - OMAP3_MCSPI_SYSCONFIG_SMARTIDLE, ®s->sysconfig); + OMAP3_MCSPI_SYSCONFIG_SMARTIDLE, &priv->regs->sysconfig); - writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, ®s->wakeupenable); + writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, &priv->regs->wakeupenable); + + /* + * Set the same default mode for each channel, especially CS polarity + * which must be common for all SPI slaves before any transfer. + */ + for (priv->cs = 0 ; priv->cs < OMAP4_MCSPI_CHAN_NB ; priv->cs++) + _omap3_spi_set_mode(priv); + priv->cs = 0; } static void _omap3_spi_claim_bus(struct omap3_spi_priv *priv) @@ -430,7 +438,7 @@ static int omap3_spi_probe(struct udevice *dev) priv->pin_dir = plat->pin_dir; priv->wordlen = SPI_DEFAULT_WORDLEN; - spi_reset(priv->regs); + spi_reset(priv); return 0; } |