diff options
| -rw-r--r-- | drivers/spi/spi-rzv2h-rspi.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/spi/spi-rzv2h-rspi.c b/drivers/spi/spi-rzv2h-rspi.c index be45269e8853..da110efba971 100644 --- a/drivers/spi/spi-rzv2h-rspi.c +++ b/drivers/spi/spi-rzv2h-rspi.c @@ -24,6 +24,7 @@ /* Registers */ #define RSPI_SPDR 0x00 #define RSPI_SPCR 0x08 +#define RSPI_SPPCR 0x0e #define RSPI_SSLP 0x10 #define RSPI_SPBR 0x11 #define RSPI_SPSCR 0x13 @@ -40,6 +41,9 @@ #define RSPI_SPCR_SCKASE BIT(12) #define RSPI_SPCR_SPE BIT(0) +/* Register SPPCR */ +#define RSPI_SPPCR_SPLP2 BIT(1) + /* Register SPBR */ #define RSPI_SPBR_SPR_MIN 0 #define RSPI_SPBR_SPR_PCLK_MIN 1 @@ -345,6 +349,7 @@ static int rzv2h_rspi_prepare_message(struct spi_controller *ctlr, u8 bits_per_word; u32 conf32; u16 conf16; + u8 conf8; /* Make sure SPCR.SPE is 0 before amending the configuration */ rzv2h_rspi_spe_disable(rspi); @@ -389,6 +394,10 @@ static int rzv2h_rspi_prepare_message(struct spi_controller *ctlr, /* Use SPCMD0 only */ writeb(0x0, rspi->base + RSPI_SPSCR); + /* Setup loopback */ + conf8 = FIELD_PREP(RSPI_SPPCR_SPLP2, !!(spi->mode & SPI_LOOP)); + writeb(conf8, rspi->base + RSPI_SPPCR); + /* Setup mode */ conf32 = FIELD_PREP(RSPI_SPCMD_CPOL, !!(spi->mode & SPI_CPOL)); conf32 |= FIELD_PREP(RSPI_SPCMD_CPHA, !!(spi->mode & SPI_CPHA)); @@ -490,7 +499,7 @@ static int rzv2h_rspi_probe(struct platform_device *pdev) } controller->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | - SPI_LSB_FIRST; + SPI_LSB_FIRST | SPI_LOOP; controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32); controller->prepare_message = rzv2h_rspi_prepare_message; controller->unprepare_message = rzv2h_rspi_unprepare_message; |