drivers: gpio: Smartbond: add support for both edge triggers (a9b44e08) · Commits · Wenxi XU / zephyr

drivers/gpio/gpio_smartbond.c

+37 −7

Changes for drivers/gpio/gpio_smartbond.c: 37 added lines, 7 removed lines.
Original line number	Diff line number	Diff line
		@@ -56,6 +56,8 @@ struct gpio_smartbond_wkup_regs {
		struct gpio_smartbond_data {
		/* gpio_driver_data needs to be first */
		struct gpio_driver_data common;
		/* Pins that are configured for both edges (handled by software) */
		gpio_port_pins_t both_edges_pins;
		sys_slist_t callbacks;
		};

		@@ -184,12 +186,30 @@ static int gpio_smartbond_port_toggle_bits(const struct device *dev,
		return 0;
		}

		static void gpio_smartbond_arm_next_edge_interrupt(const struct device *dev,
		uint32_t pin_mask)
		{
		const struct gpio_smartbond_config *config = dev->config;
		uint32_t pin_value;

		do {
		pin_value = config->data_regs->data & pin_mask;
		if (pin_value) {
		config->wkup_regs->pol \|= pin_mask;
		} else {
		config->wkup_regs->pol &= ~pin_mask;
		}
		} while (pin_value != (config->data_regs->data & pin_mask));
		}

		static int gpio_smartbond_pin_interrupt_configure(const struct device *dev,
		gpio_pin_t pin,
		enum gpio_int_mode mode,
		enum gpio_int_trig trig)
		{
		const struct gpio_smartbond_config *config = dev->config;
		struct gpio_smartbond_data *data = dev->data;
		uint32_t pin_mask = BIT(pin);

		/* Not supported by hardware */
		if (mode == GPIO_INT_MODE_LEVEL) {
		@@ -202,16 +222,15 @@ static int gpio_smartbond_pin_interrupt_configure(const struct device *dev,
		} else {
		if (trig == GPIO_INT_TRIG_BOTH) {
		/* Not supported by hardware */
		return -ENOTSUP;
		}

		if (trig == GPIO_INT_TRIG_HIGH) {
		config->wkup_regs->pol &= ~BIT(pin);
		data->both_edges_pins \|= pin_mask;
		gpio_smartbond_arm_next_edge_interrupt(dev, pin_mask);
		} else if (trig == GPIO_INT_TRIG_HIGH) {
		config->wkup_regs->pol &= ~pin_mask;
		} else {
		config->wkup_regs->pol \|= BIT(pin);
		config->wkup_regs->pol \|= pin_mask;
		}

		config->wkup_regs->sel \|= BIT(pin);
		config->wkup_regs->sel \|= pin_mask;
		}

		return 0;
		@@ -230,10 +249,21 @@ static void gpio_smartbond_isr(const struct device *dev)
		const struct gpio_smartbond_config *config = dev->config;
		struct gpio_smartbond_data *data = dev->data;
		uint32_t stat;
		uint32_t two_edge_triggered;

		WAKEUP->WKUP_RESET_IRQ_REG = WAKEUP_WKUP_RESET_IRQ_REG_WKUP_IRQ_RST_Msk;

		stat = config->wkup_regs->status;

		two_edge_triggered = stat & data->both_edges_pins;
		while (two_edge_triggered) {
		int pos = find_lsb_set(two_edge_triggered) - 1;

		two_edge_triggered &= ~BIT(pos);
		/* Re-arm for other edge */
		gpio_smartbond_arm_next_edge_interrupt(dev, BIT(pos));
		}

		config->wkup_regs->clear = stat;

		gpio_fire_callbacks(&data->callbacks, dev, stat);

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