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linux-yocto/Documentation/ABI/testing/debugfs-iio-backend
Nuno Sa cdf01e0809 iio: backend: add debugFs interface 
This adds a basic debugfs interface for backends. Two new ops are being
added:

 * debugfs_reg_access: Analogous to the core IIO one but for backend
   devices.
 * debugfs_print_chan_status: One useful usecase for this one is for
   testing test tones in a digital interface and "ask" the backend to
   dump more details on why a test tone might have errors.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240802-dev-iio-backend-add-debugfs-v2-2-4cb62852f0d0@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2024-08-03 14:36:45 +01:00

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What: /sys/kernel/debug/iio/iio:deviceX/backendY/name KernelVersion: 6.11 Contact: linux-iio@vger.kernel.org Description: Name of Backend Y connected to device X.

What: /sys/kernel/debug/iio/iio:deviceX/backendY/direct_reg_access KernelVersion: 6.11 Contact: linux-iio@vger.kernel.org Description: Directly access the registers of backend Y. Typical usage is:

	Reading address 0x50
	echo 0x50 > direct_reg_access
	cat direct_reg_access

	Writing address 0x50
	echo 0x50 0x3 > direct_reg_access
	//readback address 0x50
	cat direct_reg_access