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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:11:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-08-07 13:11:22 +0000
commitb20732900e4636a467c0183a47f7396700f5f743 (patch)
tree42f079ff82e701ebcb76829974b4caca3e5b6798 /Documentation/driver-api/gpio
parentAdding upstream version 6.8.12. (diff)
downloadlinux-b20732900e4636a467c0183a47f7396700f5f743.tar.xz
linux-b20732900e4636a467c0183a47f7396700f5f743.zip
Adding upstream version 6.9.7.upstream/6.9.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/driver-api/gpio')
-rw-r--r--Documentation/driver-api/gpio/consumer.rst10
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/driver-api/gpio/consumer.rst b/Documentation/driver-api/gpio/consumer.rst
index 3e588b9d67..ab56ab0dd7 100644
--- a/Documentation/driver-api/gpio/consumer.rst
+++ b/Documentation/driver-api/gpio/consumer.rst
@@ -222,9 +222,9 @@ Use the following calls to access GPIOs from an atomic context::
int gpiod_get_value(const struct gpio_desc *desc);
void gpiod_set_value(struct gpio_desc *desc, int value);
-The values are boolean, zero for low, nonzero for high. When reading the value
-of an output pin, the value returned should be what's seen on the pin. That
-won't always match the specified output value, because of issues including
+The values are boolean, zero for inactive, nonzero for active. When reading the
+value of an output pin, the value returned should be what's seen on the pin.
+That won't always match the specified output value, because of issues including
open-drain signaling and output latencies.
The get/set calls do not return errors because "invalid GPIO" should have been
@@ -277,11 +277,11 @@ switch their output to a high impedance value. The consumer should not need to
care. (For details read about open drain in driver.rst.)
With this, all the gpiod_set_(array)_value_xxx() functions interpret the
-parameter "value" as "asserted" ("1") or "de-asserted" ("0"). The physical line
+parameter "value" as "active" ("1") or "inactive" ("0"). The physical line
level will be driven accordingly.
As an example, if the active low property for a dedicated GPIO is set, and the
-gpiod_set_(array)_value_xxx() passes "asserted" ("1"), the physical line level
+gpiod_set_(array)_value_xxx() passes "active" ("1"), the physical line level
will be driven low.
To summarize::