diff options
Diffstat (limited to 'drivers/spi/spi-sun6i.c')
| -rw-r--r-- | drivers/spi/spi-sun6i.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c index 30d541612253..3f5b1556ece0 100644 --- a/drivers/spi/spi-sun6i.c +++ b/drivers/spi/spi-sun6i.c @@ -14,7 +14,7 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> -#include <linux/of_device.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> @@ -83,6 +83,9 @@ #define SUN6I_XMIT_CNT_REG 0x34 #define SUN6I_BURST_CTL_CNT_REG 0x38 +#define SUN6I_BURST_CTL_CNT_STC_MASK GENMASK(23, 0) +#define SUN6I_BURST_CTL_CNT_DRM BIT(28) +#define SUN6I_BURST_CTL_CNT_QUAD_EN BIT(29) #define SUN6I_TXDATA_REG 0x200 #define SUN6I_RXDATA_REG 0x300 @@ -90,6 +93,7 @@ struct sun6i_spi_cfg { unsigned long fifo_depth; bool has_clk_ctl; + u32 mode_bits; }; struct sun6i_spi { @@ -266,7 +270,7 @@ static int sun6i_spi_transfer_one(struct spi_master *master, unsigned int div, div_cdr1, div_cdr2, timeout; unsigned int start, end, tx_time; unsigned int trig_level; - unsigned int tx_len = 0, rx_len = 0; + unsigned int tx_len = 0, rx_len = 0, nbits = 0; bool use_dma; int ret = 0; u32 reg; @@ -418,13 +422,29 @@ static int sun6i_spi_transfer_one(struct spi_master *master, sun6i_spi_write(sspi, SUN6I_GBL_CTL_REG, reg); /* Setup the transfer now... */ - if (sspi->tx_buf) + if (sspi->tx_buf) { tx_len = tfr->len; + nbits = tfr->tx_nbits; + } else if (tfr->rx_buf) { + nbits = tfr->rx_nbits; + } + + switch (nbits) { + case SPI_NBITS_DUAL: + reg = SUN6I_BURST_CTL_CNT_DRM; + break; + case SPI_NBITS_QUAD: + reg = SUN6I_BURST_CTL_CNT_QUAD_EN; + break; + case SPI_NBITS_SINGLE: + default: + reg = FIELD_PREP(SUN6I_BURST_CTL_CNT_STC_MASK, tx_len); + } /* Setup the counters */ + sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, reg); sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, tfr->len); sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, tx_len); - sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, tx_len); if (!use_dma) { /* Fill the TX FIFO */ @@ -623,7 +643,8 @@ static int sun6i_spi_probe(struct platform_device *pdev) master->set_cs = sun6i_spi_set_cs; master->transfer_one = sun6i_spi_transfer_one; master->num_chipselect = 4; - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST | + sspi->cfg->mode_bits; master->bits_per_word_mask = SPI_BPW_MASK(8); master->dev.of_node = pdev->dev.of_node; master->auto_runtime_pm = true; @@ -740,6 +761,7 @@ static const struct sun6i_spi_cfg sun8i_h3_spi_cfg = { static const struct sun6i_spi_cfg sun50i_r329_spi_cfg = { .fifo_depth = SUN8I_FIFO_DEPTH, + .mode_bits = SPI_RX_DUAL | SPI_TX_DUAL | SPI_RX_QUAD | SPI_TX_QUAD, }; static const struct of_device_id sun6i_spi_match[] = { |