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These debugfs files are mainly used to make eye diagram test easier, especially helpful to do HQA test for a new IC without efuse enabled. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Link: https://lore.kernel.org/r/20230513092218.21139-2-chunfeng.yun@mediatek.com Signed-off-by: Vinod Koul <vkoul@kernel.org>