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dmaengine: Create debug directories for DMA devices

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Create a placeholder directory for each registered DMA device.

DMA drivers can use the dmaengine_get_debugfs_root() call to get their
debugfs root and can populate with custom files to aim debugging.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200306142839.17910-4-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Ujfalusi 2020-03-06 16:28:39 +02:00 • committed by Vinod Koul
parent db8d9b4c9b
commit 26cf132de6
3 changed files with 44 additions and 1 deletions
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1
include/linux/dmaengine.h
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@ -902,6 +902,7 @@ struct dma_device {
/* debugfs support */
#ifdef CONFIG_DEBUG_FS
void (*dbg_summary_show)(struct seq_file *s, struct dma_device *dev);
struct dentry *dbg_dev_root;
#endif
};