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([115.96.68.45]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2427660c7sm28451665ad.44.2026.03.28.11.20.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Mar 2026 11:20:24 -0700 (PDT) From: Tabrez Ahmed To: linux@roeck-us.net Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, shuah@kernel.org, me@brighamcampbell.com, Tabrez Ahmed Subject: [PATCH 0/2] hwmon: (ads7871) Fix concurrency and modernize API Date: Sat, 28 Mar 2026 23:50:13 +0530 Message-ID: <20260328182015.220298-1-tabreztalks@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch series addresses a concurrency issue in the ads7871 driver and modernizes it to use the current hwmon API. Patch 1: Adds a mutex to the driver's private data to serialize SPI transactions. Previously, if userspace read multiple channels concurrently, the driver could overwrite ongoing REG_GAIN_MUX writes before the conversion completed. Patch 2: Converts the driver to use hwmon_device_register_with_info(). This architectural shift removes boilerplate code and delegates sysfs management to the hwmon core: - Removes manual file creators (SENSOR_DEVICE_ATTR_RO and ads7871_attrs). - Implements ads7871_is_visible() for dynamic permission control. - Replaces the sysfs-specific voltage_show() with a standard ads7871_read() callback. - Defines supported channels via hwmon_channel_info. Tabrez Ahmed (2): hwmon: (ads7871) Add mutex to serialize SPI transactions hwmon: (ads7871) Convert to hwmon_device_register_with_info drivers/hwmon/ads7871.c | 91 +++++++++++++++++++++++------------------ 1 file changed, 52 insertions(+), 39 deletions(-) -- 2.43.0