diff options
| -rw-r--r-- | drivers/spi/omap3_spi.c | 20 | ||||
| -rw-r--r-- | include/omap3_spi.h | 4 |
2 files changed, 17 insertions, 7 deletions
diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c index 1cbb5d46fd6..ff7b55f8707 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; } diff --git a/include/omap3_spi.h b/include/omap3_spi.h index cae37705830..5381431d438 100644 --- a/include/omap3_spi.h +++ b/include/omap3_spi.h @@ -46,6 +46,8 @@ #define OMAP4_MCSPI_REG_OFFSET 0x100 +#define OMAP4_MCSPI_CHAN_NB 4 + /* OMAP3 McSPI registers */ struct mcspi_channel { unsigned int chconf; /* 0x2C, 0x40, 0x54, 0x68 */ @@ -64,7 +66,7 @@ struct mcspi { unsigned int wakeupenable; /* 0x20 */ unsigned int syst; /* 0x24 */ unsigned int modulctrl; /* 0x28 */ - struct mcspi_channel channel[4]; + struct mcspi_channel channel[OMAP4_MCSPI_CHAN_NB]; /* channel0: 0x2C - 0x3C, bus 0 & 1 & 2 & 3 */ /* channel1: 0x40 - 0x50, bus 0 & 1 */ /* channel2: 0x54 - 0x64, bus 0 & 1 */ |