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[2a02:8389:41cf:e200:937a:2f15:cf5f:c6fb]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-37ee0a4ad48sm12105728f8f.42.2024.10.24.13.44.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Oct 2024 13:44:51 -0700 (PDT) From: Javier Carrasco Subject: [PATCH v2 0/2] iio: light: veml6070: add integration time Date: Thu, 24 Oct 2024 22:44:47 +0200 Message-Id: <20241024-veml6070-integration-time-v2-0-d53272ec0feb@gmail.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=H4sIAL+xGmcC/32NQQqDMBBFryKz7pQkVVO66j2Ki8GMOmC0JCG0i HdvKnTb5fvw3t8gchCOcKs2CJwlyroUMKcK+omWkVFcYTDK1FrpGjP7uVVWoSyJx0CpCJjEM9q ro6FmImcGKP4z8CCvo/3oCk8S0xrex1XW3/VXtX+qWaPCS6Os09Y1raH76Enmc7966PZ9/wCnF fkdwgAAAA== To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1729802691; l=2000; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=7Jk1r7FEDBwbN3+UFT8qeXUAWHBJzRgT1WoU9XdCVb4=; b=FQ/grfkkDv0owoaTQ8Zy5xy8l5Svj1oYU0d1/Uy5ZoCeU8/uuMUKAkmQW+b2U91Y4KP3lPCSv hSN0dC7lLC8CRMeqi29DgfjOqcsX/STMHqM99trGQI4yCa16ozv0ppv X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= This series adds a missing feature in the veml6070 driver to select the integration time, which also depends on an external restistor that has been added to the corresponding bindings. The datasheet provides a Refresh time vs Rset graph (figure 7), which does not clearly specify the minimum and maximum values for Rset. The manufacuter has confirmed that no values under 75 kohms should be used to keep linearity, and the graph does not go beyond 1200 kohms, which is also the biggest Rset used in the application note. The default value of 270 kohms is the one currently used in the driver to calculate the UVI. Signed-off-by: Javier Carrasco --- Changes in v2: - Rebase onto iio/testing and drop applied patches. - veml6075.yaml: use documented -ohms, top-level definition and per-device restriction. - veml6075.yaml: add default value. - veml6075.yaml: fix typo in commit message. - veml6070.c: adjust rset property name and convert from ohms to kohms to avoid overflows and work with the same units as in the datasheet. - veml6070.c: change default to 270 kohms (already used as default value to calculate UVI). - veml6070.c: calculate UVI according to the current integration time. - veml6070.c: re-calculate measurement time (i.e. msleep()) with the current integration time. - Link to v1: https://lore.kernel.org/r/20241017-veml6070-integration-time-v1-0-3507d17d562a@gmail.com --- Javier Carrasco (2): dt-bindings: iio: light: veml6075: document rset-ohms iio: light: veml6070: add support for integration time .../bindings/iio/light/vishay,veml6075.yaml | 27 ++++ drivers/iio/light/veml6070.c | 137 +++++++++++++++++++-- 2 files changed, 156 insertions(+), 8 deletions(-) --- base-commit: 9090ececac9ff1e22fb7e042f3c886990a8fb090 change-id: 20241014-veml6070-integration-time-78daf4eaad2f Best regards,