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authorJack Rosenthal <jrosenth@chromium.org>2021-11-04 12:11:58 -0600
committerCommit Bot <commit-bot@chromium.org>2021-11-05 04:22:34 +0000
commit252457d4b21f46889eebad61d4c0a65331919cec (patch)
tree01856c4d31d710b20e85a74c8d7b5836e35c3b98 /zephyr/drivers/cros_system/cros_system_npcx.c
parent08f5a1e6fc2c9467230444ac9b582dcf4d9f0068 (diff)
downloadchrome-ec-stabilize-14526.57.B-ish.tar.gz
In the interest of making long-term branch maintenance incur as little technical debt on us as possible, we should not maintain any files on the branch we are not actually using. This has the added effect of making it extremely clear when merging CLs from the main branch when changes have the possibility to affect us. The follow-on CL adds a convenience script to actually pull updates from the main branch and generate a CL for the update. BUG=b:204206272 BRANCH=ish TEST=make BOARD=arcada_ish && make BOARD=drallion_ish Signed-off-by: Jack Rosenthal <jrosenth@chromium.org> Change-Id: I17e4694c38219b5a0823e0a3e55a28d1348f4b18 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3262038 Reviewed-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Tom Hughes <tomhughes@chromium.org>
Diffstat (limited to 'zephyr/drivers/cros_system/cros_system_npcx.c')
-rw-r--r--zephyr/drivers/cros_system/cros_system_npcx.c556
1 files changed, 0 insertions, 556 deletions
diff --git a/zephyr/drivers/cros_system/cros_system_npcx.c b/zephyr/drivers/cros_system/cros_system_npcx.c
deleted file mode 100644
index e3d3bc29b2..0000000000
--- a/zephyr/drivers/cros_system/cros_system_npcx.c
+++ /dev/null
@@ -1,556 +0,0 @@
-/* Copyright 2021 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include <arch/arm/aarch32/cortex_m/cmsis.h>
-#include <drivers/cros_system.h>
-#include <drivers/gpio.h>
-#include <drivers/watchdog.h>
-#include <logging/log.h>
-#include <soc.h>
-#include <soc/nuvoton_npcx/reg_def_cros.h>
-#include <sys/util.h>
-
-#include "gpio.h"
-#include "rom_chip.h"
-#include "soc_gpio.h"
-#include "soc_miwu.h"
-#include "system.h"
-
-LOG_MODULE_REGISTER(cros_system, LOG_LEVEL_ERR);
-
-/* Driver config */
-struct cros_system_npcx_config {
- /* hardware module base address */
- uintptr_t base_scfg;
- uintptr_t base_twd;
- uintptr_t base_mswc;
-};
-
-/* Driver data */
-struct cros_system_npcx_data {
- int reset; /* reset cause */
-};
-
-/* Driver convenience defines */
-#define DRV_CONFIG(dev) ((const struct cros_system_npcx_config *)(dev)->config)
-
-#define HAL_SCFG_INST(dev) (struct scfg_reg *)(DRV_CONFIG(dev)->base_scfg)
-#define HAL_TWD_INST(dev) (struct twd_reg *)(DRV_CONFIG(dev)->base_twd)
-#define HAL_MSWC_INST(dev) (struct mswc_reg *)(DRV_CONFIG(dev)->base_mswc)
-
-#define DRV_DATA(dev) ((struct cros_system_npcx_data *)(dev)->data)
-
-#define SYSTEM_DT_NODE_SOC_ID_CONFIG DT_INST(0, nuvoton_npcx_soc_id)
-
-/* Chip info devicetree data */
-#define NPCX_FAMILY_ID DT_PROP(SYSTEM_DT_NODE_SOC_ID_CONFIG, family_id)
-
-#define NPCX_CHIP_ID DT_PROP(SYSTEM_DT_NODE_SOC_ID_CONFIG, chip_id)
-
-#define NPCX_DEVICE_ID DT_PROP(SYSTEM_DT_NODE_SOC_ID_CONFIG, device_id)
-
-#define NPCX_REVISION_ADDR \
- DT_PROP_BY_IDX(SYSTEM_DT_NODE_SOC_ID_CONFIG, revision_reg, 0)
-#define NPCX_REVISION_LEN \
- DT_PROP_BY_IDX(SYSTEM_DT_NODE_SOC_ID_CONFIG, revision_reg, 1)
-
-/* RAM block size in npcx family (Unit: bytes) */
-#define NPCX_RAM_BLOCK_SIZE (32 * 1024)
-/* RAM block number in npcx7 series */
-
-/* Calculate the number of RAM blocks:
- * total RAM size = code ram + data ram + extra 2K for ROM functions
- * divided by the block size 32k.
- */
-#define DATA_RAM_SIZE DT_REG_SIZE(DT_NODELABEL(sram0))
-#define CODE_RAM_SIZE DT_REG_SIZE(DT_NODELABEL(flash0))
-#define NPCX_RAM_BLOCK_COUNT \
- ((DATA_RAM_SIZE + CODE_RAM_SIZE + KB(2)) / NPCX_RAM_BLOCK_SIZE)
-
-/* Valid bit-depth of RAM block Power-Down control (RAM_PD) registers. Use its
- * mask to power down all unnecessary RAM blocks before hibernating.
- */
-#define NPCX_RAM_PD_DEPTH DT_PROP(DT_NODELABEL(pcc), ram_pd_depth)
-#define NPCX_RAM_BLOCK_PD_MASK (BIT(NPCX_RAM_PD_DEPTH) - 1)
-
-/* Get saved reset flag address in battery-backed ram */
-#define BBRAM_SAVED_RESET_FLAG_ADDR \
- (DT_REG_ADDR(DT_INST(0, nuvoton_npcx_bbram)) + \
- DT_PROP(DT_PATH(named_bbram_regions, saved_reset_flags), offset))
-
-/* Soc specific system local functions */
-static int system_npcx_watchdog_stop(void)
-{
- if (IS_ENABLED(CONFIG_WATCHDOG)) {
- const struct device *wdt_dev = DEVICE_DT_GET(
- DT_NODELABEL(twd0));
- if (!device_is_ready(wdt_dev)) {
- LOG_ERR("Error: device %s is not ready", wdt_dev->name);
- return -ENODEV;
- }
-
- wdt_disable(wdt_dev);
- }
-
- return 0;
-}
-
-static void system_npcx_set_flash_pins_tri_state(const struct device *dev)
-{
- struct scfg_reg *const inst_scfg = HAL_SCFG_INST(dev);
-
- inst_scfg->DEVCNT |= BIT(NPCX_DEVCNT_F_SPI_TRIS);
-}
-
-static void system_npcx_init_watchdog_reset(const struct device *dev)
-{
- struct twd_reg *const inst_twd = HAL_TWD_INST(dev);
-
- /* Enable early touch */
- inst_twd->T0CSR &= ~BIT(NPCX_T0CSR_TESDIS);
- /* watchdog touched by writing 5Ch to WDSDM */
- inst_twd->TWCFG |= BIT(NPCX_TWCFG_WDSDME);
-}
-
-static void system_npcx_turn_off_adc(void)
-{
- struct adc_reg *const inst_adc =
- (struct adc_reg *)(DT_REG_ADDR(DT_INST(0, nuvoton_npcx_adc)));
-
- inst_adc->ADCCNF = 0;
- /* Wait for 1000 us to make sure conversion is completed. */
- k_busy_wait(1000);
-}
-
-static void system_npcx_turn_off_kernel_timer(void)
-{
- static struct itim32_reg *const evt_tmr =
- (struct itim32_reg *)DT_REG_ADDR_BY_NAME(
- DT_INST(0, nuvoton_npcx_itim_timer), evt_itim);
-
- evt_tmr->ITCTS32 &= ~BIT(NPCX_ITCTSXX_ITEN);
-}
-
-static void system_npcx_disable_instant_wakeup(void)
-{
- struct pmc_reg *const inst_pmc = (struct pmc_reg *)(DT_REG_ADDR_BY_NAME(
- DT_INST(0, nuvoton_npcx_pcc), pmc));
-
- inst_pmc->ENIDL_CTL &= ~BIT(NPCX_ENIDL_CTL_LP_WK_CTL);
-}
-
-static void system_npcx_set_wakeup_gpios_before_hibernate(void)
-{
- const uintptr_t miwu_base[] = {
- DT_REG_ADDR(DT_INST(0, nuvoton_npcx_miwu)),
- DT_REG_ADDR(DT_INST(1, nuvoton_npcx_miwu)),
- DT_REG_ADDR(DT_INST(2, nuvoton_npcx_miwu)),
- };
-
- /* Disable all MIWU inputs before entering hibernate */
- for (int table = 0; table < ARRAY_SIZE(miwu_base); table++) {
- for (int group = 0; group < NPCX_MIWU_GROUP_COUNT; group++) {
- /* Disable all wake-ups */
- NPCX_WKEN(miwu_base[table], group) = 0x00;
- /* Clear all pending bits of wake-ups */
- NPCX_WKPCL(miwu_base[table], group) = 0xFF;
- /*
- * Disable all inputs of wake-ups to prevent leakage
- * caused by input floating.
- */
- NPCX_WKINEN(miwu_base[table], group) = 0x00;
- }
- }
-
- static const int wakeup_pin_list[] = {
-#if DT_NODE_EXISTS(SYSTEM_DT_NODE_HIBERNATE_CONFIG)
- UTIL_LISTIFY(SYSTEM_DT_NODE_WAKEUP_PIN_LEN,
- SYSTEM_DT_WAKEUP_GPIO_ENUM_BY_IDX, _)
-#endif
- };
-
- /* Reconfigure wake-up GPIOs */
- for (int i = 0; i < ARRAY_SIZE(wakeup_pin_list); i++) {
- gpio_reset(wakeup_pin_list[i]);
- /* Re-enable interrupt for wake-up inputs */
- gpio_enable_interrupt(wakeup_pin_list[i]);
- }
-}
-
-/*
- * Hibernate function locates in the last 32K ram block in npcx7 series.
- * Do not use global variables or call functions since we have turned off
- * the other ram blocks.
- */
-noreturn void __keep __attribute__((section(".lfw.hiber")))
-system_npcx_hibernate_by_lfw_in_last_ram(const struct device *dev,
- uint32_t pd_ram_mask)
-{
- /* Modules used for hibernating */
- struct twd_reg *const inst_twd = HAL_TWD_INST(dev);
- struct mtc_reg *const inst_mtc = (struct mtc_reg *)(DT_REG_ADDR(
- DT_INST(0, nuvoton_npcx_cros_mtc)));
- struct pmc_reg *const inst_pmc = (struct pmc_reg *)(DT_REG_ADDR_BY_NAME(
- DT_INST(0, nuvoton_npcx_pcc), pmc));
- uint32_t reset_flags;
- volatile uint8_t *saved_reset_flags =
- (volatile uint8_t *)BBRAM_SAVED_RESET_FLAG_ADDR;
-
- /* Turn off all blocks except last one for better power consumption */
- inst_pmc->RAM_PD[0] = (uint8_t)pd_ram_mask;
- inst_pmc->RAM_PD[1] = (uint8_t)(pd_ram_mask >> 8);
-
- /* Set deep idle mode */
- inst_pmc->PMCSR = BIT(NPCX_PMCSR_IDLE) | BIT(NPCX_PMCSR_DHF);
-
- /* Enter system sleep mode */
- __asm__ volatile("wfi");
-
- /*
- * Mark wake-up reason for hibernate. Do not call bbram utilities
- * directly since the other ram blocks are power down.
- */
- if (IS_BIT_SET(inst_mtc->WTC, NPCX_WTC_PTO)) {
- /* Save wake-up reason as RTC alarm. */
- reset_flags = EC_RESET_FLAG_RTC_ALARM;
- } else {
- /* Otherwise, we treat it as GPIOs wake-up */
- reset_flags = EC_RESET_FLAG_WAKE_PIN;
- }
-
- saved_reset_flags[0] |= reset_flags;
- saved_reset_flags[1] |= reset_flags >> 8;
- saved_reset_flags[2] |= reset_flags >> 16;
- saved_reset_flags[3] |= reset_flags >> 24;
-
- /*
- * The trigger of a watchdog event by a "too early service" condition.
- * When the watchdog is written more than once during three watchdog
- * clock cycle.
- */
- inst_twd->WDSDM = 0x5C;
- inst_twd->WDSDM = 0x5C;
-
- /* Spin and wait for reboot; should never return */
- while (1)
- continue;
-}
-
-static inline int system_npcx_get_ram_blk_by_lfw_addr(char *address)
-{
- return NPCX_RAM_BLOCK_COUNT -
- ceiling_fraction((uint32_t)address -
- CONFIG_CROS_EC_PROGRAM_MEMORY_BASE,
- NPCX_RAM_BLOCK_SIZE);
-}
-
-static void system_npcx_hibernate_by_disable_ram(const struct device *dev,
- uint32_t seconds,
- uint32_t microseconds)
-{
- /* Get 32kb ram block order of lfw function */
- extern char __lfw_text_start[], __lfw_text_end[];
- int lfw_block = system_npcx_get_ram_blk_by_lfw_addr(__lfw_text_start);
- uint32_t pd_ram_mask = ~BIT(lfw_block) & NPCX_RAM_BLOCK_PD_MASK;
-
- if (lfw_block != system_npcx_get_ram_blk_by_lfw_addr(__lfw_text_end)) {
- LOG_ERR("LFW cannot cross ram blocks!");
- return;
- }
-
- /*
- * Set status of pins which connect to flash to tri-state in case
- * the leakage current.
- */
- system_npcx_set_flash_pins_tri_state(dev);
-
- /* Initialize watchdog for reset after wake-up from hibernating */
- system_npcx_init_watchdog_reset(dev);
-
- /* Disable ADC and wait for 1000 us to make sure conversion is done */
- if (IS_ENABLED(CONFIG_ADC))
- system_npcx_turn_off_adc();
-
- /* Disable kernel timer */
- system_npcx_turn_off_kernel_timer();
-
- /* Disable instant wake up mode for better power consumption */
- system_npcx_disable_instant_wakeup();
-
- /*
- * Set wake-up input GPIOs and turn off the other sources for better
- * power consumption before entering hibernate mode.
- */
- system_npcx_set_wakeup_gpios_before_hibernate();
-
- /*
- * Give the board a chance to do any late stage hibernation work. This
- * is likely going to configure GPIOs for hibernation. On some boards,
- * it's possible that this may not return at all. On those boards,
- * power to the EC is likely being turn off entirely.
- */
- if (board_hibernate_late) {
- board_hibernate_late();
- }
-
- /* Setup a RTC alarm if needed */
- if (IS_ENABLED(CONFIG_RTC) && (seconds || microseconds)) {
- system_set_rtc_alarm(seconds, microseconds);
- }
-
- /* Clear all pending IRQs in case wake-up immediately after sleeping */
- for (int i = 0; i < CONFIG_NUM_IRQS; i++) {
- NVIC_ClearPendingIRQ(i);
- }
-
- /* Execute hibernate by lfw which locates in last 32K block ram */
- system_npcx_hibernate_by_lfw_in_last_ram(dev, pd_ram_mask);
-}
-
-static const char *cros_system_npcx_get_chip_vendor(const struct device *dev)
-{
- struct mswc_reg *const inst_mswc = HAL_MSWC_INST(dev);
- static char str[11] = "Unknown-XX";
- char *p = str + 8;
- uint8_t fam_id = inst_mswc->SID_CR;
-
-#if DT_NODE_EXISTS(SYSTEM_DT_NODE_SOC_ID_CONFIG)
- if (fam_id == NPCX_FAMILY_ID) {
- return "Nuvoton";
- }
-#endif
-
- hex2char(fam_id >> 4, p++);
- hex2char(fam_id & 0xf, p);
- return str;
-}
-
-static const char *cros_system_npcx_get_chip_name(const struct device *dev)
-{
- struct mswc_reg *const inst_mswc = HAL_MSWC_INST(dev);
- static char str[13] = "Unknown-XXXX";
- char *p = str + 8;
- uint8_t chip_id = inst_mswc->SRID_CR;
- uint8_t device_id = inst_mswc->DEVICE_ID_CR;
-
-#if DT_NODE_EXISTS(SYSTEM_DT_NODE_SOC_ID_CONFIG)
- if (chip_id == NPCX_CHIP_ID && device_id == NPCX_DEVICE_ID) {
- return CONFIG_SOC;
- }
-#endif
-
- hex2char(chip_id >> 4, p++);
- hex2char(chip_id & 0xf, p++);
- hex2char(device_id >> 4, p++);
- hex2char(device_id & 0xf, p);
- return str;
-}
-
-static const char *cros_system_npcx_get_chip_revision(const struct device *dev)
-{
- ARG_UNUSED(dev);
-#if DT_NODE_EXISTS(SYSTEM_DT_NODE_SOC_ID_CONFIG)
- static char rev[NPCX_REVISION_LEN * 2 + 1];
-#else
- static char rev[1];
-#endif
- char *p = rev;
-
-#if DT_NODE_EXISTS(SYSTEM_DT_NODE_SOC_ID_CONFIG)
- /*
- * For NPCX7, the revision number is 1 byte.
- * For NPCX9 and later chips, the revision number is 4 bytes.
- */
- for (int s = NPCX_REVISION_ADDR + NPCX_REVISION_LEN - 1;
- s >= NPCX_REVISION_ADDR; s--) {
- uint8_t r = *((volatile uint8_t *)s);
- hex2char(r >> 4, p++);
- hex2char(r & 0xf, p++);
- }
-#endif
- *p = '\0';
-
- return rev;
-}
-
-static void system_npcx_hibernate_by_psl(const struct device *dev,
- uint32_t seconds,
- uint32_t microseconds)
-{
- ARG_UNUSED(dev);
- /*
- * TODO(b/178230662): RTC wake-up in PSL mode only support in npcx9
- * series. Nuvoton will introduce CLs for it later.
- */
- ARG_UNUSED(seconds);
- ARG_UNUSED(microseconds);
-
- /*
- * Configure PSL input pads from "psl-in-pads" property in device tree
- * file.
- */
- npcx_pinctrl_psl_input_configure();
-
- /*
- * Give the board a chance to do any late stage hibernation work. This
- * is likely going to configure GPIOs for hibernation. On some boards,
- * it's possible that this may not return at all. On those boards,
- * power to the EC is likely being turn off entirely.
- */
- if (board_hibernate_late)
- board_hibernate_late();
-
- /* Turn off VCC1 to enter ultra-low-power mode for hibernating */
- npcx_pinctrl_psl_output_set_inactive();
-}
-
-static int cros_system_npcx_get_reset_cause(const struct device *dev)
-{
- struct cros_system_npcx_data *data = DRV_DATA(dev);
-
- return data->reset;
-}
-
-static int cros_system_npcx_init(const struct device *dev)
-{
- struct scfg_reg *const inst_scfg = HAL_SCFG_INST(dev);
- struct twd_reg *const inst_twd = HAL_TWD_INST(dev);
- struct cros_system_npcx_data *data = DRV_DATA(dev);
-
- /* check reset cause */
- if (IS_BIT_SET(inst_twd->T0CSR, NPCX_T0CSR_WDRST_STS)) {
- data->reset = WATCHDOG_RST;
- inst_twd->T0CSR |= BIT(NPCX_T0CSR_WDRST_STS);
- } else if (IS_BIT_SET(inst_scfg->RSTCTL, NPCX_RSTCTL_DBGRST_STS)) {
- data->reset = DEBUG_RST;
- inst_scfg->RSTCTL |= BIT(NPCX_RSTCTL_DBGRST_STS);
- } else if (IS_BIT_SET(inst_scfg->RSTCTL, NPCX_RSTCTL_VCC1_RST_STS)) {
- data->reset = VCC1_RST_PIN;
- } else {
- data->reset = POWERUP;
- }
-
- return 0;
-}
-
-static int cros_system_npcx_soc_reset(const struct device *dev)
-{
- struct twd_reg *const inst_twd = HAL_TWD_INST(dev);
-
- /* Disable interrupts to avoid task swaps during reboot */
- interrupt_disable_all();
-
- /*
- * NPCX chip doesn't have the specific system reset functionality. Use
- * watchdog reset as a system reset.
- */
-
- /* Stop the watchdog */
- system_npcx_watchdog_stop();
-
- /* Initialize watchdog for reset */
- system_npcx_init_watchdog_reset(dev);
-
- /*
- * The trigger of a watchdog event by a "too early service" condition.
- * When the watchdog is written more than once during three watchdog
- * clock cycle.
- */
- inst_twd->WDSDM = 0x5C;
- inst_twd->WDSDM = 0x5C;
-
- /* Wait for the soc reset. */
- while (1) {
- ;
- }
-
- /* should never return */
- return 0;
-}
-
-static int cros_system_npcx_hibernate(const struct device *dev,
- uint32_t seconds, uint32_t microseconds)
-{
- /* Disable interrupt first */
- interrupt_disable_all();
-
- /* Stop the watchdog */
- system_npcx_watchdog_stop();
-
- /* Enter hibernate mode */
- if (IS_ENABLED(CONFIG_PLATFORM_EC_HIBERNATE_PSL)) {
- system_npcx_hibernate_by_psl(dev, seconds, microseconds);
- } else {
- system_npcx_hibernate_by_disable_ram(dev, seconds,
- microseconds);
- }
-
- return 0;
-}
-
-__maybe_unused static uint64_t
-cros_system_npcx_deep_sleep_ticks(const struct device *dev)
-{
- return npcx_clock_get_sleep_ticks();
-}
-
-static struct cros_system_npcx_data cros_system_npcx_dev_data;
-
-static const struct cros_system_npcx_config cros_system_dev_cfg = {
- .base_scfg = DT_REG_ADDR(DT_INST(0, nuvoton_npcx_scfg)),
- .base_twd = DT_REG_ADDR(DT_INST(0, nuvoton_npcx_watchdog)),
- .base_mswc =
- DT_REG_ADDR_BY_NAME(DT_INST(0, nuvoton_npcx_host_sub), mswc),
-};
-
-static const struct cros_system_driver_api cros_system_driver_npcx_api = {
- .get_reset_cause = cros_system_npcx_get_reset_cause,
- .soc_reset = cros_system_npcx_soc_reset,
- .hibernate = cros_system_npcx_hibernate,
- .chip_vendor = cros_system_npcx_get_chip_vendor,
- .chip_name = cros_system_npcx_get_chip_name,
- .chip_revision = cros_system_npcx_get_chip_revision,
-#ifdef CONFIG_SOC_POWER_MANAGEMENT_TRACE
- .deep_sleep_ticks = cros_system_npcx_deep_sleep_ticks,
-#endif
-};
-
-DEVICE_DEFINE(cros_system_npcx_0, "CROS_SYSTEM", cros_system_npcx_init, NULL,
- &cros_system_npcx_dev_data, &cros_system_dev_cfg, PRE_KERNEL_1,
- CONFIG_CROS_SYSTEM_NPCX_INIT_PRIORITY,
- &cros_system_driver_npcx_api);
-
-#if DT_NODE_EXISTS(DT_NODELABEL(dbg))
-#define HAL_DBG_REG_BASE_ADDR \
- ((struct dbg_reg *)DT_REG_ADDR(DT_INST(0, nuvoton_npcx_cros_dbg)))
-
-#define DBG_NODE DT_NODELABEL(dbg)
-#define DBG_PINCTRL_PH DT_PHANDLE_BY_IDX(DBG_NODE, pinctrl_0, 0)
-#define DBG_ALT_FILED(f) DT_PHA_BY_IDX(DBG_PINCTRL_PH, alts, 0, f)
-
-static int jtag_init(const struct device *dev)
-{
- ARG_UNUSED(dev);
- struct dbg_reg *const dbg_reg_base = HAL_DBG_REG_BASE_ADDR;
- const struct npcx_alt jtag_alts[] = {
- {
- .group = DBG_ALT_FILED(group),
- .bit = DBG_ALT_FILED(bit),
- .inverted = DBG_ALT_FILED(inv)
- }
- };
-
- dbg_reg_base->DBGCTRL = 0x04;
- dbg_reg_base->DBGFRZEN3 &= ~BIT(NPCX_DBGFRZEN3_GLBL_FRZ_DIS);
- if (DT_NODE_HAS_STATUS(DT_NODELABEL(dbg), okay))
- npcx_pinctrl_mux_configure(jtag_alts, 1, 1);
-
- return 0;
-}
-#if CONFIG_KERNEL_INIT_PRIORITY_DEFAULT >= 41
-#error "jtag_init must be called after default kernel init"
-#endif
-SYS_INIT(jtag_init, PRE_KERNEL_1, 41);
-#endif /* DT_NODE_EXISTS(DT_NODELABEL(dbg)) */