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Diffstat (limited to 'Documentation/ABI/testing/sysfs-devices-platform-ab5500-core-adc')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-platform-ab5500-core-adc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-platform-ab5500-core-adc b/Documentation/ABI/testing/sysfs-devices-platform-ab5500-core-adc new file mode 100644 index 00000000000..fcfc0ed26fb --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-platform-ab5500-core-adc @@ -0,0 +1,20 @@ +What: /sys/devices/platform/ab5500-core.0/ab5500-adc.0/adc0volt +Date: Nov 2011 +KernelVersion: 3.0 +Contact: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com> +Description: The adc0volt attribute allows the userspace to read the + voltage of the device connected to the General Purpose + Analog to Digital Converter (GPADC) channel-0. Voltage + conversion from analog to digital happens only when this + attribute is read. GPADC block is present in AB5500 chip + and has input voltage range of 0-1.8 volt for GPADC Ch-0. + It provides result of the converted voltage in 10 bits. + Other GPADC channels attributes may appear in this path + later. For minimum and maximum input voltage range for + each channel please refer to the ST-Ericssons AB5500 + datasheet. An example usage of GPADC can be an ALS device + connected to the channel and user space adapts the + LCD backlight brightness based on ambient light value + read from the attribute. +Users: HAL. + |