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silabs: zero latency GPIO IRQ #2

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silabs: zero latency GPIO IRQ #2

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11 changes: 11 additions & 0 deletions drivers/gpio/Kconfig.gecko
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
# Gecko GPIO configuration options

# Copyright (c) 2017 Christian Taedcke
# Copyright (c) 2025 Jonny Gellhaar
# SPDX-License-Identifier: Apache-2.0

menuconfig GPIO_GECKO
Expand All @@ -15,3 +16,13 @@ config GPIO_GECKO_COMMON_INIT_PRIORITY
int "Common initialization priority"
depends on GPIO_GECKO
default 39

config GPIO_GECKO_ZERO_LATENCY_IRQ
bool "Cofigure GPIO as Zephyr zero latency IRQ"
default n
depends on GPIO_GECKO
select ZERO_LATENCY_IRQS
help
Make sure to read documentatino of zero latency IRQ and its
implications and potential dangers. Do not call kernel API
from the GPIO inerrupt callback.
11 changes: 9 additions & 2 deletions drivers/gpio/gpio_gecko.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2017, Christian Taedcke
* Copyright (c) 2025, Jonny Gellhaar
*
* SPDX-License-Identifier: Apache-2.0
*/
Expand Down Expand Up @@ -391,6 +392,12 @@ DEVICE_DT_DEFINE(DT_INST(0, silabs_gecko_gpio),
PRE_KERNEL_1, CONFIG_GPIO_GECKO_COMMON_INIT_PRIORITY,
&gpio_gecko_common_driver_api);

#ifdef CONFIG_GPIO_GECKO_ZERO_LATENCY_IRQ
#define CONFIGURED_FLAGS IRQ_ZERO_LATENCY
#else
#define CONFIGURED_FLAGS 0u
#endif /* CONFIG_GPIO_GECKO_ZERO_LATENCY_IRQ */

static int gpio_gecko_common_init(const struct device *dev)
{
#ifdef CONFIG_SOC_GECKO_DEV_INIT
Expand All @@ -400,12 +407,12 @@ static int gpio_gecko_common_init(const struct device *dev)
IRQ_CONNECT(GPIO_EVEN_IRQn,
DT_IRQ_BY_NAME(DT_INST(0, silabs_gecko_gpio), gpio_even, priority),
gpio_gecko_common_isr,
DEVICE_DT_GET(DT_INST(0, silabs_gecko_gpio)), 0);
DEVICE_DT_GET(DT_INST(0, silabs_gecko_gpio)), CONFIGURED_FLAGS);

IRQ_CONNECT(GPIO_ODD_IRQn,
DT_IRQ_BY_NAME(DT_INST(0, silabs_gecko_gpio), gpio_odd, priority),
gpio_gecko_common_isr,
DEVICE_DT_GET(DT_INST(0, silabs_gecko_gpio)), 0);
DEVICE_DT_GET(DT_INST(0, silabs_gecko_gpio)), CONFIGURED_FLAGS);

irq_enable(GPIO_EVEN_IRQn);
irq_enable(GPIO_ODD_IRQn);
Expand Down
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