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[87.15.70.119]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39d7c6d838bsm4396138f8f.69.2025.04.08.03.20.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Apr 2025 03:20:12 -0700 (PDT) From: Angelo Dureghello X-Google-Original-From: Angelo Dureghello Subject: [PATCH v4 0/5] iio: ad3552r-hs: add support for internal ramp generator Date: Tue, 08 Apr 2025 12:18:50 +0200 Message-Id: <20250408-wip-bl-ad3552r-fixes-v4-0-b33c0264bd78@baylibre.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAAr49GcC/4XNTQ6CMBAF4KuYrq1pO0MBV97DuOjPIE0QSGtQY 7i71Y3GSFy+N3nf3FmiGCix7erOIk0hhaHPAdcr5lrTH4kHnzNTQhUClOSXMHLbceOhKFTkTbh S4mig0jWik6VgeTpGeh3ycn/IuQ3pPMTb68skn+0fcJJccHDSGIW1lxp21ty6YCNt3HBiT3NSH w4sOSo7zpO3CALrkn448HZQlAsOZEfLqkShC6tF8+XM8/wAjaWTHUsBAAA= X-Change-ID: 20250321-wip-bl-ad3552r-fixes-4a386944c170 To: =?utf-8?q?Nuno_S=C3=A1?= , Jonathan Cameron , Lars-Peter Clausen , Jonathan Corbet , Olivier Moysan , Michael Hennerich Cc: linux-iio@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Angelo Dureghello X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2510; i=adureghello@baylibre.com; h=from:subject:message-id; bh=VqkQDwdjjBLXg0xsTy9tSOcc4xRmbJVc0CLEPpdho78=; b=owGbwMvMwCXGf3bn1e/btlsznlZLYkj/8kOQZ064XHzXNd2ubwkCv658uW316gnT28kl19/We 3AEijT+7ShlYRDjYpAVU2SpS4wwCb0dKqW8gHE2zBxWJpAhDFycAjCRDesZ/lfX9vDc1n2qyv7Z 7o/e72MrG09/uFOepHx98orn13zzth5nZHifeUWureeFD+9pxy/pb5fzB9tbG8rnXXnlsD7euT5 LmxcA X-Developer-Key: i=adureghello@baylibre.com; a=openpgp; fpr=703CDFAD8B573EB00850E38366D1CB9419AF3953 Add support to enable the HDL IP core internal ramp generator, actually managed by the adi-axi-dac backend. It works this way: /sys/bus/iio/devices/iio:device0# echo 1 > buffer0/out_voltage0_en /sys/bus/iio/devices/iio:device0# echo 1 > buffer0/out_voltage1_en /sys/bus/iio/devices/iio:device0# echo 1 > buffer0/enable Activating ramp generator: /sys/kernel/debug/iio/iio:device0# echo -n backend-ramp-generator > data_source Deactivating: /sys/kernel/debug/iio/iio:device0# echo -n iio-buffer > data_source Signed-off-by: Angelo Dureghello --- Changes in v4: - set data source based on hw channels available (model_data), - use a string array for data_source debugfs attribute, - modify debugfs accessors to use the string array, - add new "data_source_available" debugfs attr, - fix documentation accordingly. - Link to v3: https://lore.kernel.org/r/20250407-wip-bl-ad3552r-fixes-v3-0-61874065b60f@baylibre.com Changes in v3: - add mutex description, - use devm_mutex_init and check for return value. - Link to v2: https://lore.kernel.org/r/20250331-wip-bl-ad3552r-fixes-v2-0-cdedb430497e@baylibre.com Changes in v2: - doc, add few words for generic spi driver version, - axi-dac, add a separate patch to check cntrl chan validity, - axi-dac, return EIO on a wrong source on get, - add a lock on debugfs file access, - use const strings and strlen on file access. - Link to v1: https://lore.kernel.org/r/20250321-wip-bl-ad3552r-fixes-v1-0-3c1aa249d163@baylibre.com --- Angelo Dureghello (5): iio: dac: adi-axi-dac: add cntrl chan check docs: iio: add documentation for ad3552r driver iio: backend: add support for data source get iio: dac: adi-axi-dac: add data source get iio: dac: ad3552r-hs: add support for internal ramp Documentation/iio/ad3552r.rst | 73 ++++++++++++++++ Documentation/iio/index.rst | 1 + MAINTAINERS | 1 + drivers/iio/dac/ad3552r-hs.c | 166 +++++++++++++++++++++++++++++++++++-- drivers/iio/dac/adi-axi-dac.c | 54 ++++++++++++ drivers/iio/industrialio-backend.c | 28 +++++++ include/linux/iio/backend.h | 5 ++ 7 files changed, 322 insertions(+), 6 deletions(-) --- base-commit: eb870a5af7db1e5ca59330875125230b28e630f9 change-id: 20250321-wip-bl-ad3552r-fixes-4a386944c170 Best regards,