This adds a driver for the AW9523 I2C GPIO expander.
This driver is required to make LEDs as well as buttons on the Tenbay
T-MB5EU-V01 work.
This driver already had several upstream iterations. I'm working to
push this driver to mainline.
Ref: https://patchwork.ozlabs.org/project/linux-gpio/list/?series=226287
Signed-off-by: David Bauer <mail@david-bauer.net>
Some targets select HZ=100, others HZ=250. There's no reason to select a higher
timer frequency (and 100 Hz are available in every architecture), so change all
targets to 100 Hz.
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
