Alexandre Courbot ad824783fb
gpio: better lookup method for platform GPIOs ...
Change the format of the platform GPIO lookup tables to make them less
confusing and improve lookup efficiency.
The previous format was a single linked-list that required to compare
the device name and function ID of every single GPIO defined for each
lookup. Switch that to a list of per-device tables, so that the lookup
can be done in two steps, omitting the GPIOs that are not relevant for a
particular device.
The matching rules are now defined as follows:
- The device name must match *exactly*, and can be NULL for GPIOs not
assigned to a particular device,
- If the function ID in the lookup table is NULL, the con_id argument of
gpiod_get() will not be used for lookup. However, if it is defined, it
must match exactly.
- The index must always match.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com >
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com >
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
Signed-off-by: Linus Walleij <linus.walleij@linaro.org >
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ad824783fb