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drivers: reset: Add NXP RSTCTL driver

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Add driver for NXP RSTCTL reset controller peripheral.

Signed-off-by: Declan Snyder <declan.snyder@nxp.com>
This commit is contained in:
Declan Snyder 2024-05-01 12:09:15 -05:00 committed by Anas Nashif
parent 1a7d95e26c
commit 399193f54e
4 changed files with 92 additions and 0 deletions
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1
drivers/reset/CMakeLists.txt
View file

@ -11,3 +11,4 @@ zephyr_library_sources_ifdef(CONFIG_RESET_NUMAKER reset_numaker.c)
zephyr_library_sources_ifdef(CONFIG_RESET_INTEL_SOCFPGA reset_intel_socfpga.c)
zephyr_library_sources_ifdef(CONFIG_RESET_NPCX reset_npcx.c)
zephyr_library_sources_ifdef(CONFIG_RESET_NXP_SYSCON reset_lpc_syscon.c)
zephyr_library_sources_ifdef(CONFIG_RESET_NXP_RSTCTL reset_nxp_rstctl.c)

1
drivers/reset/Kconfig
View file

@ -35,5 +35,6 @@ rsource "Kconfig.numaker"
rsource "Kconfig.intel_socfpga"
rsource "Kconfig.npcx"
rsource "Kconfig.lpc_syscon"
rsource "Kconfig.nxp_rstctl"
endif # RESET

10
drivers/reset/Kconfig.nxp_rstctl Normal file
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@ -0,0 +1,10 @@
# Copyright 2024 NXP
# SPDX-License-Identifier: Apache-2.0
config RESET_NXP_RSTCTL
bool "NXP RSTCTL driver"
default y
depends on DT_HAS_NXP_RSTCTL_ENABLED
help
Enable the driver for the NXP RSTCTL,
a peripheral reset controller.

80
drivers/reset/reset_nxp_rstctl.c Normal file
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@ -0,0 +1,80 @@
/*
* Copyright 2024 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_rstctl
#include <zephyr/device.h>
#include <zephyr/drivers/reset.h>
#include <zephyr/sys/util.h>
#include <fsl_device_registers.h>
#define NXP_RSTCTL_OFFSET(id) ((id >> 16) * sizeof(uint32_t))
#define NXP_RSTCTL_BIT(id) (BIT(id & 0xFFFF))
#define NXP_RSTCTL_CTL(id) (NXP_RSTCTL_OFFSET(id) + 0x10)
#define NXP_RSTCTL_SET(id) (NXP_RSTCTL_OFFSET(id) + 0x40)
#define NXP_RSTCTL_CLR(id) (NXP_RSTCTL_OFFSET(id) + 0x70)
static int reset_nxp_rstctl_status(const struct device *dev, uint32_t id, uint8_t *status)
{
const uint32_t *base = dev->config;
volatile const uint32_t *ctl_reg = base+(NXP_RSTCTL_CTL(id)/sizeof(uint32_t));
uint32_t val = *ctl_reg;
*status = (uint8_t)FIELD_GET(NXP_RSTCTL_BIT(id), val);
return 0;
}
static int reset_nxp_rstctl_line_assert(const struct device *dev, uint32_t id)
{
const uint32_t *base = dev->config;
volatile uint32_t *set_reg = (uint32_t *)base+(NXP_RSTCTL_SET(id)/sizeof(uint32_t));
*set_reg = FIELD_PREP(NXP_RSTCTL_BIT(id), 0b1);
return 0;
}
static int reset_nxp_rstctl_line_deassert(const struct device *dev, uint32_t id)
{
const uint32_t *base = dev->config;
volatile uint32_t *clr_reg = (uint32_t *)base+(NXP_RSTCTL_CLR(id)/sizeof(uint32_t));
*clr_reg = FIELD_PREP(NXP_RSTCTL_BIT(id), 0b1);
return 0;
}
static int reset_nxp_rstctl_line_toggle(const struct device *dev, uint32_t id)
{
uint8_t status = 0;
reset_nxp_rstctl_line_assert(dev, id);
do {
reset_nxp_rstctl_status(dev, id, &status);
} while (status != 0b1);
reset_nxp_rstctl_line_deassert(dev, id);
return 0;
}
static const struct reset_driver_api reset_nxp_rstctl_driver_api = {
.status = reset_nxp_rstctl_status,
.line_assert = reset_nxp_rstctl_line_assert,
.line_deassert = reset_nxp_rstctl_line_deassert,
.line_toggle = reset_nxp_rstctl_line_toggle,
};
#define NXP_RSTCTL_INIT(n) \
DEVICE_DT_INST_DEFINE(n, NULL, NULL, NULL, \
(void *)DT_INST_REG_ADDR(n), \
PRE_KERNEL_1, CONFIG_RESET_INIT_PRIORITY, \
&reset_nxp_rstctl_driver_api);
DT_INST_FOREACH_STATUS_OKAY(NXP_RSTCTL_INIT)