diff options
| author | Alexander Shiyan <shc_work@mail.ru> | 2014-02-02 07:59:48 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-02-03 19:24:45 +0100 |
| commit | c7a26f121df611caa47576a169627bfd1c3d1b38 (patch) | |
| tree | 4dc088dc50fb08f3d993e80ad2cdaac56eeb373e /drivers/spi | |
| parent | Linus 3.14-rc1 (diff) | |
| download | linux-c7a26f121df611caa47576a169627bfd1c3d1b38.tar.xz linux-c7a26f121df611caa47576a169627bfd1c3d1b38.zip | |
spi: clps711x: Simplify handling of RX & TX buffers
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-clps711x.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index 374ba4a48a9e..89e5ea843fd0 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -32,7 +32,6 @@ struct spi_clps711x_data { u8 *tx_buf; u8 *rx_buf; - int count; int len; int chipselect[0]; @@ -93,11 +92,12 @@ static int spi_clps711x_transfer_one_message(struct spi_master *master, struct spi_clps711x_data *hw = spi_master_get_devdata(master); struct spi_transfer *xfer; int status = 0, cs = hw->chipselect[msg->spi->chip_select]; - u32 data; spi_clps711x_setup_mode(msg->spi); list_for_each_entry(xfer, &msg->transfers, transfer_list) { + u8 data; + if (spi_clps711x_setup_xfer(msg->spi, xfer)) { status = -EINVAL; goto out_xfr; @@ -107,13 +107,12 @@ static int spi_clps711x_transfer_one_message(struct spi_master *master, reinit_completion(&hw->done); - hw->count = 0; hw->len = xfer->len; hw->tx_buf = (u8 *)xfer->tx_buf; hw->rx_buf = (u8 *)xfer->rx_buf; /* Initiate transfer */ - data = hw->tx_buf ? hw->tx_buf[hw->count] : 0; + data = hw->tx_buf ? *hw->tx_buf++ : 0; clps_writel(data | SYNCIO_FRMLEN(8) | SYNCIO_TXFRMEN, SYNCIO); wait_for_completion(&hw->done); @@ -138,18 +137,16 @@ out_xfr: static irqreturn_t spi_clps711x_isr(int irq, void *dev_id) { struct spi_clps711x_data *hw = (struct spi_clps711x_data *)dev_id; - u32 data; + u8 data; /* Handle RX */ data = clps_readb(SYNCIO); if (hw->rx_buf) - hw->rx_buf[hw->count] = (u8)data; - - hw->count++; + *hw->rx_buf++ = data; /* Handle TX */ - if (hw->count < hw->len) { - data = hw->tx_buf ? hw->tx_buf[hw->count] : 0; + if (--hw->len > 0) { + data = hw->tx_buf ? *hw->tx_buf++ : 0; clps_writel(data | SYNCIO_FRMLEN(8) | SYNCIO_TXFRMEN, SYNCIO); } else complete(&hw->done); |