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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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