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8a45b22057
Using the internal vs. external pull resistors it is possible to get
27 different combinations from 3 strapping pins. Add an implementation
of this.
This involves updating the sandbox GPIO driver to model external and
(weaker) internal pull resistors. The get_value() method now takes account
of what is driving a pin:
sandbox: GPIOD_EXT_DRIVEN - in which case GPIO_EXT_HIGH provides the
value
outside source - in which case GPIO_EXT_PULL_UP/DOWN indicates the
external state and we work the final state using those flags and
the internal GPIOD_PULL_UP/DOWN flags
Of course the outside source does not really exist in sandbox. We are just
modelling it for test purpose.
Signed-off-by: Simon Glass <sjg@chromium.org>
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| .. | ||
| bitops | ||
| atomic-long.h | ||
| atomic.h | ||
| bitsperlong.h | ||
| global_data.h | ||
| gpio.h | ||
| int-ll64.h | ||
| io.h | ||
| ioctl.h | ||
| pe.h | ||
| sections.h | ||
| signal.h | ||
| types.h | ||
| u-boot.h | ||
| unaligned.h | ||