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65 lines
1.6 KiB
65 lines
1.6 KiB
/* |
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* Copyright 2024 NXP |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#define DT_DRV_COMPAT nxp_lpc_syscon_reset |
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#include <zephyr/device.h> |
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#include <zephyr/drivers/reset.h> |
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#include <zephyr/sys/util.h> |
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#include <fsl_device_registers.h> |
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#define LPC_RESET_OFFSET(id) (id >> 16) |
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#define LPC_RESET_BIT(id) (BIT(id & 0xFFFF)) |
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static int reset_nxp_syscon_status(const struct device *dev, uint32_t id, uint8_t *status) |
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{ |
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const volatile uint32_t *ctrl_reg = ((uint32_t *)dev->config)+(LPC_RESET_OFFSET(id)); |
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*status = (uint8_t)FIELD_GET((uint32_t)LPC_RESET_BIT(id), *ctrl_reg); |
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return 0; |
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} |
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static int reset_nxp_syscon_line_assert(const struct device *dev, uint32_t id) |
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{ |
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SYSCON->PRESETCTRLSET[LPC_RESET_OFFSET(id)] = FIELD_PREP(LPC_RESET_BIT(id), 0b1); |
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return 0; |
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} |
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static int reset_nxp_syscon_line_deassert(const struct device *dev, uint32_t id) |
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{ |
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SYSCON->PRESETCTRLCLR[LPC_RESET_OFFSET(id)] = FIELD_PREP(LPC_RESET_BIT(id), 0b1); |
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return 0; |
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} |
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static int reset_nxp_syscon_line_toggle(const struct device *dev, uint32_t id) |
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{ |
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uint8_t status = 0; |
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reset_nxp_syscon_line_assert(dev, id); |
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do { |
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reset_nxp_syscon_status(dev, id, &status); |
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} while (status != 0b1); |
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reset_nxp_syscon_line_deassert(dev, id); |
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return 0; |
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} |
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static DEVICE_API(reset, reset_nxp_syscon_driver_api) = { |
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.status = reset_nxp_syscon_status, |
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.line_assert = reset_nxp_syscon_line_assert, |
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.line_deassert = reset_nxp_syscon_line_deassert, |
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.line_toggle = reset_nxp_syscon_line_toggle, |
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}; |
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DEVICE_DT_INST_DEFINE(0, NULL, NULL, NULL, |
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(void *)(DT_REG_ADDR(DT_INST_PARENT(0)) + 0x100), |
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PRE_KERNEL_1, CONFIG_RESET_INIT_PRIORITY, |
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&reset_nxp_syscon_driver_api);
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