gpio: pca953x: add support for TCA9538
The TCA9538 is an 8 bit version of the already supported TCA9539. This chip also has interrupt support. Signed-off-by: Liam Beguin <liambeguin@gmail.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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1b961a75
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