tree a313b8516eb621a90c9a14a2b4a8d0c64e942cd9
parent 6dfcf4e1df3b4690fdf2629815d2a91294f34493
author Abhi Singh <abhi.singh@arm.com> 1731947376 -0600
committer Abhi Singh <Abhi.Singh@arm.com> 1742324176 +0100

feat(io): add generic gpio spi bit-bang driver

When using a tpm breakout board with rpi3, we elected to bit-bang
gpio pins to emulate a spi interface, this implementation required a
driver to interface with the platform specific pins and emulate spi
functionality. The generic driver provides the ability to pass in a
gpio_spi_data structure that contains the necessary gpio pins in
order to simulate spi operations (get_access, start, stop, xfer).

Change-Id: I88919e8a294c05e0cabb8224e35ae5c1ba5f2413
Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
Signed-off-by: Abhi Singh <abhi.singh@arm.com>