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linux/Documentation/ABI/testing/debugfs-iio-backend

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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>
2024-08-02 16:27:00 +02:00
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
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