@@ -218,8 +218,10 @@ static int tegra_adma_init(struct tegra_adma *tdma)
ret = readx_poll_timeout(readl,
tdma->base_addr + ADMA_GLOBAL_SOFT_RESET,
status, status == 0, 20, 10000);
- if (ret)
+ if (ret) {
+ dev_err(tdma->dev, "Timeout waiting for soft reset\n");
return ret;
+ }
/* Enable global ADMA registers */
tdma_write(tdma, ADMA_GLOBAL_CMD, 1);
@@ -581,6 +583,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
ret = pm_runtime_get_sync(tdc2dev(tdc));
if (ret < 0) {
+ dev_err(tdc2dev(tdc), "failed to get pm runtime: %d\n", ret);
free_irq(tdc->irq, tdc);
return ret;
}
@@ -647,8 +650,10 @@ static int tegra_adma_runtime_resume(struct device *dev)
int ret;
ret = pm_clk_resume(dev);
- if (ret)
+ if (ret) {
+ dev_err(dev, "failed to resume pm clock: %d\n", ret);
return ret;
+ }
tdma_write(tdma, ADMA_GLOBAL_CMD, tdma->global_cmd);
@@ -718,6 +723,9 @@ static int tegra_adma_probe(struct platform_device *pdev)
tdc->irq = of_irq_get(pdev->dev.of_node, i);
if (tdc->irq < 0) {
+ dev_err(&pdev->dev,
+ "failed to get irq for channel %d: %d\n",
+ i + 1, tdc->irq);
ret = tdc->irq;
goto irq_dispose;
}
There could be something going wrong during the probe() part, so it would not be ideal for debugging by silently returning. This patches adds some necessary dev_err() to give the hints. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> --- drivers/dma/tegra210-adma.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)