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SubjectRe: [PATCH v2 2/3] docs: hwmon: add max31732 documentation
On Wed, Dec 14, 2022 at 05:22:05PM +0300, Sinan Divarci wrote:
> Adding documentation for max31732 quad remote temperature sensor
>
> Signed-off-by: Sinan Divarci <Sinan.Divarci@analog.com>
> ---
> Documentation/hwmon/index.rst | 1 +
> Documentation/hwmon/max31732.rst | 62 ++++++++++++++++++++++++++++++++
> 2 files changed, 63 insertions(+)
> create mode 100644 Documentation/hwmon/max31732.rst
>
> diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
> index fe2cc6b73..e521bf555 100644
> --- a/Documentation/hwmon/index.rst
> +++ b/Documentation/hwmon/index.rst
> @@ -133,6 +133,7 @@ Hardware Monitoring Kernel Drivers
> max20751
> max31722
> max31730
> + max31732
> max31760
> max31785
> max31790
> diff --git a/Documentation/hwmon/max31732.rst b/Documentation/hwmon/max31732.rst
> new file mode 100644
> index 000000000..67bfcf393
> --- /dev/null
> +++ b/Documentation/hwmon/max31732.rst
> @@ -0,0 +1,62 @@
> +.. SPDX-License-Identifier: GPL-2.0-or-later
> +
> +Kernel driver max31732
> +======================
> +
> +Supported chips:
> +
> + * Analog Devices MAX31732
> +
> + Prefix: 'max31732'
> +
> + Addresses scanned: none
> +
> +Author: Sinan Divarci <Sinan.Divarci@analog.com>
> +
> +
> +Description
> +-----------
> +
> +This driver implements support for Maxim MAX31732.
> +
> +The MAX31732 is a multi-channel temperature sensor that monitors its
> +own temperature and the temperatures of up to four external diodeconnected
> +transistors. The device operates with 3.0V to 3.6V supply range
> +and consume TBDμA of current in standby mode of operation. Resistance

TBDμA ?

> +cancellation feature compensates for high series resistance between
> +circuit-board traces and the external thermal diode, while beta
> +compensation corrects for temperature-measurement errors due to lowbeta
> +sensing transistors.
> +
> +The MAX31732 offers two open-drain, active-low alarm outputs,
> +ALARM1 and ALARM2. When the measured temperature of a channel
> +crosses the respective primary over/under temperature threshold levels
> +ALARM1 asserts low and a status bit is set in the corresponding thermal
> +status registers. When the measured temperature of a channel crosses the
> +secondary over/under temperature threshold levels, ALARM2 asserts low
> +and a status bit is set in the corresponding thermal status registers.
> +
> +Temperature measurement range: from -64°C to 150°C
> +
> +Temperature Resolution: 12 Bits, ±0.0625°C
> +
> +Sysfs entries
> +-------------
> +
> +===================== == =======================================================
> +temp[1-5]_enable RW Temperature enable/disable
> + Set to 1 to enable channel, 0 to disable
> +temp[1-5]_input RO Temperature input
> +temp[2-5]_fault RO Fault indicator for remote channels
> +temp[1-5]_max RW Temperature max value. Asserts "ALARM1" pin when exceeded
> +temp[1-5]_max_alarm RO Temperature max alarm status
> +temp[1-5]_crit RW Temperature critical value. Asserts "ALARM2" pin when exceeded
> +temp[1-5]_crit_alarm RO Temperature critical alarm status
> +temp[1-5]_min RW Temperature min value. Common for all channels.
> + Only temp1_min is writeable. Asserts "ALARM1" pin when exceeded
> +temp[1-5]_min_alarm RO Temperature min alarm status
> +temp[1-5]_lcrit RW Temperature critical low value. Common for all channels.
> + Only temp1_min is writeable. Asserts "ALARM2" pin when exceeded
> +temp[1-5]_lcrit_alarm RO Temperature critical low alarm status
> +temp[2-5]_offset RW Temperature offset for remote channels
> +===================== == =======================================================

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