michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: gpio: Smartbond: Add pdc support

Browse source 
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: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
This commit is contained in:
Jerzy Kasenberg 2023-08-22 14:42:00 +02:00 • committed by Carles Cufí
commit 48c56cebaa
1 changed files with 26 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

28
drivers/gpio/gpio_smartbond.c
View file

@ -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; \