add max31732 driver #2959
add max31732 driver #2959
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sdivarci
requested review from
CiprianRegus,
amiclaus,
btogorean,
buha,
chegbeli,
danmois,
dbogdan,
machschmitt,
mhennerich,
nunojsa and
rbolboac
as code owners
nunojsa
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nunojsa
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Hi Sinan,
Just a first high level review. We first need to have this driver using modern hwmon API and have the userspace interface figured.
Also note that the expectation is for this to be first upstreamed (and accepted) before merging it in our tree
Documentation/hwmon/max31732.rst
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| * All temperatures reported via sysfs are in milli-degree Celsius. | ||
| * ``stop`` halts conversions but does not power-cycle the part; use ``soft_por`` | ||
| to restore all the registers to their default values. |
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this patch can typically be squashed with the one adding the driver
machschmitt
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machschmitt
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Hi @sdivarci,
A few comments from me.
I'm not very familiar with hwmon so feel safe to disregard any potentially misleading suggestion.
| reg: | ||
| description: I2C address of the device. | ||
| maxItems: 1 | ||
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The guideline is to make dt docs as complete as possible. So, we can also describe the voltage supply here.
vcc-supply: true|
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| required: | ||
| - compatible | ||
| - reg |
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Unless I'm missing something, the device requires a power supply to operate, so
required:
- compatible
- reg
- vcc-supply|
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| sensor@1c { | ||
| compatible = "adi,max31732"; | ||
| reg = <0x1c>; |
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and it also needs to appear in the example. e.g.
vcc-supply = <&supply_3_3V>;
drivers/hwmon/max31732.c
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| dev_set_drvdata(dev, data); | ||
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| if (fwnode_property_read_bool(dev_fwnode(dev), "adi,extended-range")) | ||
| ret = regmap_set_bits(data->regmap, MAX31732_REG_CONF1, MAX31732_CONF1_EXTRANGE); |
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The extended_range bit is only set here (at probe) and never changed after that. Then, there are a few places where it's read, (e.g. on max31732_read(), max31732_write(), max31732_highest_temperature_show(), ...). What about having a field for that in struct max31732_data so we can simplify code in those places where we currently do regmap_test_bits(data->regmap, MAX31732_REG_CONF1, MAX31732_CONF1_EXTRANGE);?
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Also, to me, adi,extended-range doesn't seem very related to how hardware is setup. It's mostly a tweak in data offset. I worry dt maintainers might object to accepting that. Do hwmon offer any interface for changing data offset at runtime?
Hi Sinan, this is Balaji from Celestica. Could you please let me know when this driver will be pushed upstream? It is important for our current project. |
Add support for Analog Devices MAX31732, a five-channel temperature monitor with per-channel alarms, calibration helpers, and optional IRQ handling. Signed-off-by: Sinan Divarci <sinan.divarci@analog.com>
Add documentation for the Analog Devices MAX31732 temperature sensor driver under Documentation/hwmon. Signed-off-by: Sinan Divarci <sinan.divarci@analog.com>
Add device tree bindings for the Analog Devices MAX31732 temperature sensor driver under Documentation/devicetree/bindings/hwmon/. Signed-off-by: Sinan Divarci <sinan.divarci@analog.com>
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Hi @nunojsa @machschmitt I've made changes to the driver code and documentation based on your review notes; could you please review them again? |
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PR Description
Add MAX31732 hwmod driver and documentation.
PR Type
PR Checklist