Alexandre Courbot 1a989d0f1d
gpiolib: link all gpio_chips using a list ...
Add a list member to gpio_chip that allows all chips to be parsed
quickly. The current method requires parsing the entire GPIO integer
space, which is painfully slow. Using a list makes many chip operations
that involve lookup or parsing faster, and also simplifies the code. It
is also necessary to eventually get rid of the global gpio_desc[] array.
The list of gpio_chips is always ordered by base GPIO number to ensure
chips traversal is done in the right order.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com >
Reviewed-by: Linus Walleij <linus.walleij@linaro.org >
Signed-off-by: Grant Likely <grant.likely@secretlab.ca >
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Alexandre Courbot
1a989d0f1d