spi: Fixes for v3.9

A bunch of small driver fixes plus a fix for error handling in the core
 - nothing too exciting overall.
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Merge tag 'spi-fix-v3.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc

Pull spi fixes from Mark Brown:
 "A bunch of small driver fixes plus a fix for error handling in the
  core - nothing too exciting overall."

* tag 'spi-fix-v3.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc:
  spi/mpc512x-psc: optionally keep PSC SS asserted across xfer segmensts
  spi: Unlock a spinlock before calling into the controller driver.
  spi/s3c64xx: modified error interrupt handling and init
  spi/bcm63xx: don't disable non enabled clocks in probe error path
  spi/bcm63xx: Remove unused variable
  spi: slink-tegra20: move runtime pm calls to transfer_one_message
master
Linus Torvalds 10 years ago
commit e0a77f2631
  1. 3
      drivers/spi/spi-bcm63xx.c
  2. 2
      drivers/spi/spi-mpc512x-psc.c
  3. 41
      drivers/spi/spi-s3c64xx.c
  4. 25
      drivers/spi/spi-tegra20-slink.c
  5. 15
      drivers/spi/spi.c

@ -152,7 +152,6 @@ static void bcm63xx_spi_setup_transfer(struct spi_device *spi,
static int bcm63xx_spi_setup(struct spi_device *spi)
{
struct bcm63xx_spi *bs;
int ret;
bs = spi_master_get_devdata(spi->master);
@ -490,7 +489,7 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
default:
dev_err(dev, "unsupported MSG_CTL width: %d\n",
bs->msg_ctl_width);
goto out_clk_disable;
goto out_err;
}
/* Initialize hardware */

@ -164,7 +164,7 @@ static int mpc512x_psc_spi_transfer_rxtx(struct spi_device *spi,
for (i = count; i > 0; i--) {
data = tx_buf ? *tx_buf++ : 0;
if (len == EOFBYTE)
if (len == EOFBYTE && t->cs_change)
setbits32(&fifo->txcmd, MPC512x_PSC_FIFO_EOF);
out_8(&fifo->txdata_8, data);
len--;

@ -994,25 +994,30 @@ static irqreturn_t s3c64xx_spi_irq(int irq, void *data)
{
struct s3c64xx_spi_driver_data *sdd = data;
struct spi_master *spi = sdd->master;
unsigned int val;
unsigned int val, clr = 0;
val = readl(sdd->regs + S3C64XX_SPI_PENDING_CLR);
val = readl(sdd->regs + S3C64XX_SPI_STATUS);
val &= S3C64XX_SPI_PND_RX_OVERRUN_CLR |
S3C64XX_SPI_PND_RX_UNDERRUN_CLR |
S3C64XX_SPI_PND_TX_OVERRUN_CLR |
S3C64XX_SPI_PND_TX_UNDERRUN_CLR;
writel(val, sdd->regs + S3C64XX_SPI_PENDING_CLR);
if (val & S3C64XX_SPI_PND_RX_OVERRUN_CLR)
if (val & S3C64XX_SPI_ST_RX_OVERRUN_ERR) {
clr = S3C64XX_SPI_PND_RX_OVERRUN_CLR;
dev_err(&spi->dev, "RX overrun\n");
if (val & S3C64XX_SPI_PND_RX_UNDERRUN_CLR)
}
if (val & S3C64XX_SPI_ST_RX_UNDERRUN_ERR) {
clr |= S3C64XX_SPI_PND_RX_UNDERRUN_CLR;
dev_err(&spi->dev, "RX underrun\n");
if (val & S3C64XX_SPI_PND_TX_OVERRUN_CLR)
}
if (val & S3C64XX_SPI_ST_TX_OVERRUN_ERR) {
clr |= S3C64XX_SPI_PND_TX_OVERRUN_CLR;
dev_err(&spi->dev, "TX overrun\n");
if (val & S3C64XX_SPI_PND_TX_UNDERRUN_CLR)
}
if (val & S3C64XX_SPI_ST_TX_UNDERRUN_ERR) {
clr |= S3C64XX_SPI_PND_TX_UNDERRUN_CLR;
dev_err(&spi->dev, "TX underrun\n");
}
/* Clear the pending irq by setting and then clearing it */
writel(clr, sdd->regs + S3C64XX_SPI_PENDING_CLR);
writel(0, sdd->regs + S3C64XX_SPI_PENDING_CLR);
return IRQ_HANDLED;
}
@ -1036,9 +1041,13 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel)
writel(0, regs + S3C64XX_SPI_MODE_CFG);
writel(0, regs + S3C64XX_SPI_PACKET_CNT);
/* Clear any irq pending bits */
writel(readl(regs + S3C64XX_SPI_PENDING_CLR),
regs + S3C64XX_SPI_PENDING_CLR);
/* Clear any irq pending bits, should set and clear the bits */
val = S3C64XX_SPI_PND_RX_OVERRUN_CLR |
S3C64XX_SPI_PND_RX_UNDERRUN_CLR |
S3C64XX_SPI_PND_TX_OVERRUN_CLR |
S3C64XX_SPI_PND_TX_UNDERRUN_CLR;
writel(val, regs + S3C64XX_SPI_PENDING_CLR);
writel(0, regs + S3C64XX_SPI_PENDING_CLR);
writel(0, regs + S3C64XX_SPI_SWAP_CFG);

@ -858,21 +858,6 @@ static int tegra_slink_setup(struct spi_device *spi)
return 0;
}
static int tegra_slink_prepare_transfer(struct spi_master *master)
{
struct tegra_slink_data *tspi = spi_master_get_devdata(master);
return pm_runtime_get_sync(tspi->dev);
}
static int tegra_slink_unprepare_transfer(struct spi_master *master)
{
struct tegra_slink_data *tspi = spi_master_get_devdata(master);
pm_runtime_put(tspi->dev);
return 0;
}
static int tegra_slink_transfer_one_message(struct spi_master *master,
struct spi_message *msg)
{
@ -885,6 +870,12 @@ static int tegra_slink_transfer_one_message(struct spi_master *master,
msg->status = 0;
msg->actual_length = 0;
ret = pm_runtime_get_sync(tspi->dev);
if (ret < 0) {
dev_err(tspi->dev, "runtime get failed: %d\n", ret);
goto done;
}
single_xfer = list_is_singular(&msg->transfers);
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
INIT_COMPLETION(tspi->xfer_completion);
@ -921,6 +912,8 @@ static int tegra_slink_transfer_one_message(struct spi_master *master,
exit:
tegra_slink_writel(tspi, tspi->def_command_reg, SLINK_COMMAND);
tegra_slink_writel(tspi, tspi->def_command2_reg, SLINK_COMMAND2);
pm_runtime_put(tspi->dev);
done:
msg->status = ret;
spi_finalize_current_message(master);
return ret;
@ -1148,9 +1141,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
master->setup = tegra_slink_setup;
master->prepare_transfer_hardware = tegra_slink_prepare_transfer;
master->transfer_one_message = tegra_slink_transfer_one_message;
master->unprepare_transfer_hardware = tegra_slink_unprepare_transfer;
master->num_chipselect = MAX_CHIP_SELECT;
master->bus_num = -1;

@ -543,17 +543,16 @@ static void spi_pump_messages(struct kthread_work *work)
/* Lock queue and check for queue work */
spin_lock_irqsave(&master->queue_lock, flags);
if (list_empty(&master->queue) || !master->running) {
if (master->busy && master->unprepare_transfer_hardware) {
ret = master->unprepare_transfer_hardware(master);
if (ret) {
spin_unlock_irqrestore(&master->queue_lock, flags);
dev_err(&master->dev,
"failed to unprepare transfer hardware\n");
return;
}
if (!master->busy) {
spin_unlock_irqrestore(&master->queue_lock, flags);
return;
}
master->busy = false;
spin_unlock_irqrestore(&master->queue_lock, flags);
if (master->unprepare_transfer_hardware &&
master->unprepare_transfer_hardware(master))
dev_err(&master->dev,
"failed to unprepare transfer hardware\n");
return;
}

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