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f4ff415564
This patch adds support for Lattice's POWR1220 power manager IC. Read access to all the ADCs on the chip are supported through the hwmon sysfs files. Signed-off-by: Scott Kanowitz <skanowitz@echo360.com> [Guenter Roeck: Removed some extra ( )] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
46 lines
1.3 KiB
Plaintext
46 lines
1.3 KiB
Plaintext
Kernel driver powr1220
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==================
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Supported chips:
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* Lattice POWR1220AT8
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Prefix: 'powr1220'
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Addresses scanned: none
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Datasheet: Publicly available at the Lattice website
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http://www.latticesemi.com/
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Author: Scott Kanowitz <scott.kanowitz@gmail.com>
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Description
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-----------
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This driver supports the Lattice POWR1220AT8 chip. The POWR1220
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includes voltage monitoring for 14 inputs as well as trim settings
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for output voltages and GPIOs. This driver implements the voltage
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monitoring portion of the chip.
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Voltages are sampled by a 12-bit ADC with a step size of 2 mV.
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An in-line attenuator allows measurements from 0 to 6 V. The
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attenuator is enabled or disabled depending on the setting of the
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input's max value. The driver will enable the attenuator for any
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value over the low measurement range maximum of 2 V.
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The input naming convention is as follows:
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driver name pin name
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in0 VMON1
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in1 VMON2
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in2 VMON3
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in2 VMON4
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in4 VMON5
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in5 VMON6
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in6 VMON7
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in7 VMON8
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in8 VMON9
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in9 VMON10
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in10 VMON11
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in11 VMON12
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in12 VCCA
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in13 VCCINP
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The ADC readings are updated on request with a minimum period of 1s.
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