diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-oc-tiny.c | 62 |
1 files changed, 11 insertions, 51 deletions
diff --git a/drivers/spi/spi-oc-tiny.c b/drivers/spi/spi-oc-tiny.c index 91c668596202..f7c896e2981e 100644 --- a/drivers/spi/spi-oc-tiny.c +++ b/drivers/spi/spi-oc-tiny.c @@ -153,62 +153,22 @@ static int tiny_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) } wait_for_completion(&hw->done); - } else if (txp && rxp) { - /* we need to tighten the transfer loop */ - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { - u8 rx, tx = *txp++; - tiny_spi_wait_txr(hw); - rx = readb(hw->base + TINY_SPI_TXDATA); - writeb(tx, hw->base + TINY_SPI_TXDATA); - *rxp++ = rx; - } - tiny_spi_wait_txr(hw); - *rxp++ = readb(hw->base + TINY_SPI_TXDATA); - } - tiny_spi_wait_txe(hw); - *rxp++ = readb(hw->base + TINY_SPI_RXDATA); - } else if (rxp) { - writeb(0, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(0, - hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { - u8 rx; - tiny_spi_wait_txr(hw); - rx = readb(hw->base + TINY_SPI_TXDATA); - writeb(0, hw->base + TINY_SPI_TXDATA); - *rxp++ = rx; - } - tiny_spi_wait_txr(hw); - *rxp++ = readb(hw->base + TINY_SPI_TXDATA); - } - tiny_spi_wait_txe(hw); - *rxp++ = readb(hw->base + TINY_SPI_RXDATA); - } else if (txp) { - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(*txp++, hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { - u8 tx = *txp++; - tiny_spi_wait_txr(hw); - writeb(tx, hw->base + TINY_SPI_TXDATA); - } - } - tiny_spi_wait_txe(hw); } else { - writeb(0, hw->base + TINY_SPI_TXDATA); - if (t->len > 1) { - writeb(0, hw->base + TINY_SPI_TXDATA); - for (i = 2; i < t->len; i++) { + /* we need to tighten the transfer loop */ + writeb(txp ? *txp++ : 0, hw->base + TINY_SPI_TXDATA); + for (i = 1; i < t->len; i++) { + writeb(txp ? *txp++ : 0, hw->base + TINY_SPI_TXDATA); + + if (rxp || (i != t->len - 1)) tiny_spi_wait_txr(hw); - writeb(0, hw->base + TINY_SPI_TXDATA); - } + if (rxp) + *rxp++ = readb(hw->base + TINY_SPI_TXDATA); } tiny_spi_wait_txe(hw); + if (rxp) + *rxp++ = readb(hw->base + TINY_SPI_RXDATA); } + return t->len; } |
