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These are straight wrappers around existing functions, but with a name
that's more like their Linux counterparts.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230116134501.2006391-3-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The gpiod_ family of kernel functions always assume the logical state
for values (i.e. taking active low/high into account). We already have
gpio_set_value, so add gpiod_get_value for symmetry.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230109155836.2220277-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Linux devm_gpiod_get_index is a superset of devm_gpiod_get.
We already support gpiod_get to simplify kernel code porting, so
reimplement it in terms of a new dev_gpiod_get_index to simplify
porting kernel code using that as well.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230109155836.2220277-3-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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barebox gpio identifiers are always in the range of non-negative
signed integers with negative values reserved for errors.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230109155836.2220277-2-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The '_d' suffix was originally introduced in case we want to import
Linux struct device as a separate struct into barebox. Over time it
became clear that this won't happen, instead barebox struct device_d
is basically the same as Linux struct device. Rename the struct name
accordingly to make porting Linux code easier.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Link: https://lore.barebox.org/20221214123512.189688-3-s.hauer@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Linux gpiod_set_value is silent if the GPIO descriptor is NULL, but
barebox warns about it. Also having gpio_set_value not respect active
low/high, while Linux gpiod_set_value respects it is error-prone.
Add a new gpiod_set_value function that covers this. gpio == -ENOENT is
taken as the dummy value for optional GPIOs.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220202223023.341817-2-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Many Linux drivers use [devm_]gpiod_get to get appropriately configured
GPIO descriptors out with little code. Make porting such Linux code
easier by providing a semi-compatible gpiod_get function. Main
differences:
- It returns a gpio index, so it can be passed to any gpio_ function
- It's device-tree only, so it should only be used from drivers
that themselves probe from device tree.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Link: https://lore.pengutronix.de/20210410103511.2073504-1-ahmad@a3f.at
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