xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dmaengine: Create debug directories for DMA devices

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/dma/dmaengine.h
View File

@@ -182,4 +182,20 @@ dmaengine_desc_callback_valid(struct dmaengine_desc_callback *cb)
struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
struct dma_chan *dma_get_any_slave_channel(struct dma_device *device);
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
static inline struct dentry *
dmaengine_get_debugfs_root(struct dma_device *dma_dev) {
return dma_dev->dbg_dev_root;
}
#else
struct dentry;
static inline struct dentry *
dmaengine_get_debugfs_root(struct dma_device *dma_dev)
{
return NULL;
}
#endif /* CONFIG_DEBUG_FS */
#endif