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    Subject[PATCH 08/16] Blackfin SPI Driver: add a few more debug messages in useful places
    Date
    From: Mike Frysinger <vapier.adi@gmail.com>

    Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
    Signed-off-by: Bryan Wu <cooloney@kernel.org>
    ---
    drivers/spi/spi_bfin5xx.c | 12 ++++++++++--
    1 files changed, 10 insertions(+), 2 deletions(-)

    diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
    index a7c8976..e293d19 100644
    --- a/drivers/spi/spi_bfin5xx.c
    +++ b/drivers/spi/spi_bfin5xx.c
    @@ -559,9 +559,13 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
    struct driver_data *drv_data = dev_id;
    struct chip_data *chip = drv_data->cur_chip;
    struct spi_message *msg = drv_data->cur_msg;
    + unsigned short dmastat = get_dma_curr_irqstat(drv_data->dma_channel);
    u16 spistat = read_STAT(drv_data);

    - dev_dbg(&drv_data->pdev->dev, "in dma_irq_handler\n");
    + dev_dbg(&drv_data->pdev->dev,
    + "in dma_irq_handler dmastat:0x%x spistat:0x%x\n",
    + dmastat, spistat);
    +
    clear_dma_irqstat(drv_data->dma_channel);

    /* Wait for DMA to complete */
    @@ -631,6 +635,7 @@ static void pump_transfers(unsigned long data)

    /* Handle for abort */
    if (message->state == ERROR_STATE) {
    + dev_dbg(&drv_data->pdev->dev, "transfer: we've hit an error\n");
    message->status = -EIO;
    giveback(drv_data);
    return;
    @@ -638,6 +643,7 @@ static void pump_transfers(unsigned long data)

    /* Handle end of message */
    if (message->state == DONE_STATE) {
    + dev_dbg(&drv_data->pdev->dev, "transfer: all done!\n");
    message->status = 0;
    giveback(drv_data);
    return;
    @@ -645,6 +651,7 @@ static void pump_transfers(unsigned long data)

    /* Delay if requested at end of transfer */
    if (message->state == RUNNING_STATE) {
    + dev_dbg(&drv_data->pdev->dev, "transfer: still running ...\n");
    previous = list_entry(transfer->transfer_list.prev,
    struct spi_transfer, transfer_list);
    if (previous->delay_usecs)
    @@ -805,7 +812,8 @@ static void pump_transfers(unsigned long data)
    dma_config = (RESTART | dma_width | DI_EN);
    if (drv_data->rx != NULL) {
    /* set transfer mode, and enable SPI */
    - dev_dbg(&drv_data->pdev->dev, "doing DMA in.\n");
    + dev_dbg(&drv_data->pdev->dev, "doing DMA in to %p (size %zx)\n",
    + drv_data->rx, drv_data->len_in_bytes);

    /* invalidate caches, if needed */
    if (bfin_addr_dcachable((unsigned long) drv_data->rx))
    --
    1.5.6.3

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