[RFC 0/2] sandbox: add gpio support with libftdi1

Sascha Hauer s.hauer at pengutronix.de
Wed Feb 15 23:34:30 PST 2017

Hi Antony,

On Wed, Feb 15, 2017 at 10:12:25AM +0300, Antony Pavlov wrote:
> This patch series makes it possible to use FT2232H ACBUS[7:0]
> pins as gpio pins from sandbox barebox.
> I have tested output gpio functionality by connecting
> a LED to ACBUS[0] and lightening it with gpio_direction_output
> and gpio_set_value barebox commands.
> Also I have performed input test with ACBUS[0] -> ACBUS[1] loopback.
> The main goal of adding gpio functionality to sandbox barebox
> is using it for connecting real i2c and spi devices to sandbox barebox
> (not tested yet).

I just read that the FT2232H can even do native I2C and SPI, so no gpio
bitbanging would be necessary. Would it be possible to use this mode

Otherwise I think there should be a possibility to specify which, if
any, FT2232H chip barebox uses.


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