79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2022 Google Inc
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define DT_DRV_COMPAT st_stm32_rcc_rctl
|
||
|
|
|
||
|
|
#include <zephyr/arch/cpu.h>
|
||
|
|
#include <zephyr/device.h>
|
||
|
|
#include <zephyr/devicetree.h>
|
||
|
|
#include <zephyr/drivers/reset.h>
|
||
|
|
|
||
|
|
#define STM32_RESET_SET_OFFSET(id) (((id) >> 5U) & 0xFFFU)
|
||
|
|
#define STM32_RESET_REG_BIT(id) ((id)&0x1FU)
|
||
|
|
|
||
|
|
struct reset_stm32_config {
|
||
|
|
uintptr_t base;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int reset_stm32_status(const struct device *dev, uint32_t id,
|
||
|
|
uint8_t *status)
|
||
|
|
{
|
||
|
|
const struct reset_stm32_config *config = dev->config;
|
||
|
|
|
||
|
|
*status = !!sys_test_bit(config->base + STM32_RESET_SET_OFFSET(id),
|
||
|
|
STM32_RESET_REG_BIT(id));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int reset_stm32_line_assert(const struct device *dev, uint32_t id)
|
||
|
|
{
|
||
|
|
const struct reset_stm32_config *config = dev->config;
|
||
|
|
|
||
|
|
sys_set_bit(config->base + STM32_RESET_SET_OFFSET(id),
|
||
|
|
STM32_RESET_REG_BIT(id));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int reset_stm32_line_deassert(const struct device *dev, uint32_t id)
|
||
|
|
{
|
||
|
|
const struct reset_stm32_config *config = dev->config;
|
||
|
|
|
||
|
|
sys_clear_bit(config->base + STM32_RESET_SET_OFFSET(id),
|
||
|
|
STM32_RESET_REG_BIT(id));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int reset_stm32_line_toggle(const struct device *dev, uint32_t id)
|
||
|
|
{
|
||
|
|
reset_stm32_line_assert(dev, id);
|
||
|
|
reset_stm32_line_deassert(dev, id);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int reset_stm32_init(const struct device *dev)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct reset_driver_api reset_stm32_driver_api = {
|
||
|
|
.status = reset_stm32_status,
|
||
|
|
.line_assert = reset_stm32_line_assert,
|
||
|
|
.line_deassert = reset_stm32_line_deassert,
|
||
|
|
.line_toggle = reset_stm32_line_toggle,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct reset_stm32_config reset_stm32_config = {
|
||
|
|
.base = DT_REG_ADDR(DT_INST_PARENT(0)),
|
||
|
|
};
|
||
|
|
|
||
|
|
DEVICE_DT_INST_DEFINE(0, reset_stm32_init, NULL, NULL, &reset_stm32_config,
|
||
|
|
PRE_KERNEL_1, CONFIG_RESET_INIT_PRIORITY,
|
||
|
|
&reset_stm32_driver_api);
|