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Andy Shevchenko ec3576eac1 Documentation: firmware-guide: gpio-properties: Add note to SPI CS case 
Historically ACPI has no means of the GPIO polarity and thus
the SPISerialBus() resource defines it on the per-chip basis.
In order to avoid an ambiguity, the GPIO polarity is considered
being always Active High.

Add note about this to the respective documentation file.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
History 2021-04-28 19:11:13 +02:00
..
acpi Documentation: firmware-guide: gpio-properties: Add note to SPI CS case 2021-04-28 19:11:13 +02:00
index.rst Documentation: add Linux ACPI to Sphinx TOC tree 2019-04-25 23:06:53 +02:00