Commit 35c485b6 authored by Sanjay Vallimanalan's avatar Sanjay Vallimanalan Committed by Benjamin Cabé
Browse files

drivers: gpio: Add GPIO Fast Wake support 



The fast wake feature in the MSPM0 GPIO peripheral allows the GPIO module
to stay in a low-power state and detect interrupt events on the device pins
without requiring a high-speed clock. This allows the device to support
fast wakeup from low-power modes, such as STOP and STANDBY, on any GPIO
pin.

Signed-off-by: default avatarSanjay Vallimanalan <sanjay@linumiz.com>
Signed-off-by: default avatarParthiban Nallathambi <parthiban@linumiz.com>
parent 199017fa

drivers/gpio/gpio_mspm0.c

+17 −1
Original line number Diff line number Diff line
@@ -158,6 +158,8 @@ static int gpio_mspm0_pin_configure(const struct device *port, 
				    gpio_flags_t flags)

{

	const struct gpio_mspm0_config *config = port->config;

	DL_GPIO_WAKEUP wakeup = DL_GPIO_WAKEUP_DISABLE;



	/* determine pull up resistor value based on flags */

	DL_GPIO_RESISTOR pull_res;
@@ -169,14 +171,25 @@ static int gpio_mspm0_pin_configure(const struct device *port, 
		pull_res = DL_GPIO_RESISTOR_NONE;

	}



	if (flags & GPIO_INT_WAKEUP) {

		if (flags & GPIO_ACTIVE_LOW) {

			wakeup = DL_GPIO_WAKEUP_ON_0;

		} else {

			wakeup = DL_GPIO_WAKEUP_ON_1;

		}

	}



	/* Config pin based on flags */

	switch (flags & (GPIO_INPUT | GPIO_OUTPUT)) {

	case GPIO_INPUT:

		if (wakeup != DL_GPIO_WAKEUP_DISABLE) {

			DL_GPIO_enableFastWakePins(config->base, BIT(pin));

		}

		DL_GPIO_initDigitalInputFeatures(config->pincm_lut[pin],

						 DL_GPIO_INVERSION_DISABLE,

						 pull_res,

						 DL_GPIO_HYSTERESIS_DISABLE,

						 DL_GPIO_WAKEUP_DISABLE);

						 wakeup);

		DL_GPIO_disableOutput(config->base, BIT(pin));

		break;

	case GPIO_OUTPUT:
@@ -198,6 +211,9 @@ static int gpio_mspm0_pin_configure(const struct device *port, 
		DL_GPIO_enableOutput(config->base, BIT(pin));

		break;

	case GPIO_DISCONNECTED:

		if (wakeup != DL_GPIO_WAKEUP_DISABLE) {

			DL_GPIO_disableWakeUp(config->pincm_lut[pin]);

		}

		DL_GPIO_disableOutput(config->base, BIT(pin));

		break;

	default:

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