Commit 48c56ceb authored by Jerzy Kasenberg's avatar Jerzy Kasenberg Committed by Carles Cufi
Browse files

drivers: gpio: Smartbond: Add pdc support 

This change allows to have GPIO interrupts configured
that will work while chip enters low power modes where
PD_COM is turned off.

PDC controller can wake up system on GPIO changes even when
PD_COM is off.

This is done by adding PDC entries that will wakeup Cortex-M33
at the same time when WAKEUP controller is programmed to
handle GPIO state changes.

Signed-off-by: default avatarJerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
parent a9b44e08

drivers/gpio/gpio_smartbond.c

+26 −2
Changes for drivers/gpio/gpio_smartbond.c: 26 added lines, 2 removed lines.
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <zephyr/irq.h>



#include <DA1469xAB.h>

#include <da1469x_pdc.h>



#define GPIO_MODE_RESET		0x200
@@ -68,6 +69,8 @@ struct gpio_smartbond_config { 
	volatile uint32_t *mode_regs;

	volatile struct gpio_smartbond_latch_regs *latch_regs;

	volatile struct gpio_smartbond_wkup_regs *wkup_regs;

	/* Value of TRIG_SELECT for PDC_CTRLx_REG entry */

	uint8_t wkup_trig_select;

};



static void gpio_smartbond_wkup_init(void)
@@ -210,15 +213,26 @@ static int gpio_smartbond_pin_interrupt_configure(const struct device *dev, 
	const struct gpio_smartbond_config *config = dev->config;

	struct gpio_smartbond_data *data = dev->data;

	uint32_t pin_mask = BIT(pin);

#if CONFIG_PM

	int trig_select_id = (config->wkup_trig_select << 5) | pin;

	int pdc_ix;

#endif



	/* Not supported by hardware */

	if (mode == GPIO_INT_MODE_LEVEL) {

		return -ENOTSUP;

	}



#if CONFIG_PM

	pdc_ix = da1469x_pdc_find(trig_select_id, MCU_PDC_MASTER_M33, MCU_PDC_EN_XTAL);

#endif

	if (mode == GPIO_INT_MODE_DISABLED) {

		config->wkup_regs->sel &= ~BIT(pin);

		config->wkup_regs->clear = BIT(pin);

		config->wkup_regs->sel &= ~pin_mask;

		config->wkup_regs->clear = pin_mask;

		data->both_edges_pins &= ~pin_mask;

#if CONFIG_PM

		da1469x_pdc_del(pdc_ix);

#endif

	} else {

		if (trig == GPIO_INT_TRIG_BOTH) {

			/* Not supported by hardware */
@@ -231,6 +245,15 @@ static int gpio_smartbond_pin_interrupt_configure(const struct device *dev, 
		}



		config->wkup_regs->sel |= pin_mask;

#if CONFIG_PM

		if (pdc_ix < 0) {

			pdc_ix = da1469x_pdc_add(trig_select_id, MCU_PDC_MASTER_M33,

						 MCU_PDC_EN_XTAL);

		}

		if (pdc_ix < 0) {

			return -ENOMEM;

		}

#endif

	}



	return 0;
@@ -294,6 +317,7 @@ static const struct gpio_driver_api gpio_smartbond_drv_api_funcs = { 
						DT_INST_REG_ADDR_BY_NAME(id, latch),	\

		.wkup_regs = (volatile struct gpio_smartbond_wkup_regs *)		\

						DT_INST_REG_ADDR_BY_NAME(id, wkup),	\

		.wkup_trig_select = id,							\

	};										\

											\

	static struct gpio_smartbond_data gpio_smartbond_p##id##_data;			\

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