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drivers: gpio: mchp_mss: Add reset support

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Add support to reset the device through a reset controller.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This commit is contained in:
Sebastian Huber 2025-06-18 04:04:02 +02:00 committed by Daniel DeGrasse
parent 9132ac48bf
commit 9832973bec
2 changed files with 20 additions and 4 deletions
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22
drivers/gpio/gpio_mchp_mss.c
View File

@ -15,6 +15,12 @@
#include <zephyr/drivers/gpio/gpio_utils.h>
/* Is MSS GPIO module 'resets' line property defined */
#define MSS_GPIO_RESET_ENABLED DT_ANY_INST_HAS_PROP_STATUS_OKAY(resets)
#if MSS_GPIO_RESET_ENABLED
#include <zephyr/drivers/reset.h>
#endif
#define MSS_GPIO_INPUT_MODE 0x02
#define MSS_GPIO_OUTPUT_MODE 0x05
@ -48,6 +54,9 @@ struct mss_gpio_config {
uintptr_t gpio_base_addr;
uint32_t gpio_irq_base;
mss_gpio_cfg_func_t gpio_cfg_func;
#if MSS_GPIO_RESET_ENABLED
struct reset_dt_spec reset_spec;
#endif
};
struct mss_gpio_data {
@ -209,10 +218,15 @@ static DEVICE_API(gpio, mss_gpio_driver) = {
static int mss_gpio_init(const struct device *dev)
{
volatile struct mss_gpio_t *gpio = DEV_GPIO(dev);
const struct mss_gpio_config *cfg = DEV_GPIO_CFG(dev);
#if MSS_GPIO_RESET_ENABLED
if (cfg->reset_spec.dev != NULL) {
(void)reset_line_deassert_dt(&cfg->reset_spec);
}
#endif
gpio->gpio_irq = 0xFFFFFFFFU;
const struct mss_gpio_config *cfg = DEV_GPIO_CFG(dev);
/* Configure GPIO device */
cfg->gpio_cfg_func();
return 0;
@ -239,7 +253,9 @@ static void mss_gpio_irq_handler(const struct device *dev)
}, \
.gpio_base_addr = DT_INST_REG_ADDR(n), \
.gpio_irq_base = DT_INST_IRQN(n), \
.gpio_cfg_func = gpio_mss_gpio_cfg_func_##n \
.gpio_cfg_func = gpio_mss_gpio_cfg_func_##n, \
IF_ENABLED(DT_INST_NODE_HAS_PROP(n, resets), \
(.reset_spec = RESET_DT_SPEC_INST_GET(n),)) \
}; \
\
DEVICE_DT_INST_DEFINE(n, \

2
dts/bindings/gpio/microchip,mpfs-gpio.yaml
View File

@ -5,7 +5,7 @@ description: Microchip PolarFire SoC GPIO
compatible: "microchip,mpfs-gpio"
include: [gpio-controller.yaml, base.yaml]
include: [gpio-controller.yaml, base.yaml, reset-device.yaml]
properties:
reg: