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libgpiod 2.x api

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This commit is contained in:
Maxim Devaev
2024-01-14 22:25:09 +02:00
parent e1c6d1a990
commit e28dec4e33
8 changed files with 141 additions and 136 deletions
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50
kvmd/plugins/hid/_mcu/gpio.py
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@@ -47,30 +47,29 @@ class Gpio: # pylint: disable=too-many-instance-attributes
self.__reset_inverted = reset_inverted
self.__reset_delay = reset_delay
self.__chip: (gpiod.Chip | None) = None
self.__power_detect_line: (gpiod.Line | None) = None
self.__reset_line: (gpiod.Line | None) = None
self.__line_request: (gpiod.LineRequest | None) = None
self.__last_power: (bool | None) = None
def __enter__(self) -> None:
if self.__power_detect_pin >= 0 or self.__reset_pin >= 0:
assert self.__chip is None
self.__chip = gpiod.Chip(self.__device_path)
assert self.__line_request is None
config: dict[int, gpiod.LineSettings] = {}
if self.__power_detect_pin >= 0:
assert self.__power_detect_line is None
self.__power_detect_line = self.__chip.get_line(self.__power_detect_pin)
self.__power_detect_line.request(
"kvmd::hid::power_detect", gpiod.LINE_REQ_DIR_IN,
flags=(gpiod.LINE_REQ_FLAG_BIAS_PULL_DOWN if self.__power_detect_pull_down else 0),
config[self.__power_detect_pin] = gpiod.LineSettings(
direction=gpiod.line.Direction.INPUT,
bias=(gpiod.line.Bias.PULL_DOWN if self.__power_detect_pull_down else gpiod.line.Bias.AS_IS),
)
if self.__reset_pin >= 0:
assert self.__reset_line is None
self.__reset_line = self.__chip.get_line(self.__reset_pin)
self.__reset_line.request(
"kvmd::hid::reset", gpiod.LINE_REQ_DIR_OUT,
default_vals=[int(self.__reset_inverted)],
config[self.__reset_pin] = gpiod.LineSettings(
direction=gpiod.line.Direction.OUTPUT,
output_value=gpiod.line.Value(self.__reset_inverted),
)
assert len(config) > 0
self.__line_request = gpiod.request_lines(
self.__device_path,
consumer="kvmd::hid",
config=config,
)
def __exit__(
self,
@@ -79,19 +78,18 @@ class Gpio: # pylint: disable=too-many-instance-attributes
_tb: types.TracebackType,
) -> None:
if self.__chip:
if self.__line_request:
try:
self.__chip.close()
self.__line_request.release()
except Exception:
pass
self.__last_power = None
self.__power_detect_line = None
self.__reset_line = None
self.__chip = None
self.__line_request = None
def is_powered(self) -> bool:
if self.__power_detect_line is not None:
power = bool(self.__power_detect_line.get_value())
if self.__power_detect_pin >= 0:
assert self.__line_request
power = bool(self.__line_request.get_value(self.__power_detect_pin).value)
if power != self.__last_power:
get_logger(0).info("HID power state changed: %s -> %s", self.__last_power, power)
self.__last_power = power
@@ -100,11 +98,11 @@ class Gpio: # pylint: disable=too-many-instance-attributes
def reset(self) -> None:
if self.__reset_pin >= 0:
assert self.__reset_line
assert self.__line_request
try:
self.__reset_line.set_value(int(not self.__reset_inverted))
self.__line_request.set_value(self.__reset_pin, gpiod.line.Value(not self.__reset_inverted))
time.sleep(self.__reset_delay)
finally:
self.__reset_line.set_value(int(self.__reset_inverted))
self.__line_request.set_value(self.__reset_pin, gpiod.line.Value(self.__reset_inverted))
time.sleep(1)
get_logger(0).info("Reset HID performed")