drivers: gpio_nrfx: Free channel when changing mode (581f7565) · Commits · Wenxi XU / zephyr

Fix an issue where calling gpio_pin_interrupt_configure with edge mode and later calling it with level mode, did not release the allocated gpiote channel. Repeating the above sequence caused us to run out of gpiote channels. Signed-off-by:

Markus Lassila <markus.lassila@nordicsemi.no>

drivers/gpio/gpio_nrfx.c

+9 −0

Changes for drivers/gpio/gpio_nrfx.c: 9 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -444,6 +444,15 @@ static int gpio_nrfx_pin_interrupt_configure(const struct device *port,
		}

		trigger_config.p_in_channel = &ch;
		} else {
		/* If edge mode with channel was previously used and we are changing to sense or
		* level triggered, we must free the channel.
		*/
		err = nrfx_gpiote_channel_get(&cfg->gpiote, abs_pin, &ch);
		if (err == NRFX_SUCCESS) {
		err = nrfx_gpiote_channel_free(&cfg->gpiote, ch);
		__ASSERT_NO_MSG(err == NRFX_SUCCESS);
		}
		}

		err = nrfx_gpiote_input_configure(&cfg->gpiote, abs_pin, &input_pin_config);

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