44 lines
840 B
C
44 lines
840 B
C
/*
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* Copyright 2020 Broadcom
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/device.h>
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#include <zephyr/init.h>
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#include <soc.h>
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#include <zephyr/arch/cpu.h>
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/**
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* @brief Perform basic hardware initialization at boot.
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*
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* This needs to be run from the very beginning.
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* So the init priority has to be 0 (zero).
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*
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* @return 0
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*/
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static int viper_init(const struct device *arg)
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{
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uint32_t key;
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uint32_t data;
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ARG_UNUSED(arg);
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key = irq_lock();
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/* pcie pmon lite init */
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data = sys_read32(LS_ICFG_PMON_LITE_CLK_CTRL);
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data |= PCIE_PMON_LITE_CLK_ENABLE;
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sys_write32(data, LS_ICFG_PMON_LITE_CLK_CTRL);
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data = sys_read32(LS_ICFG_PMON_LITE_SW_RESETN);
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data |= PCIE_PMON_LITE_SW_RESETN;
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sys_write32(data, LS_ICFG_PMON_LITE_SW_RESETN);
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irq_unlock(key);
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return 0;
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}
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SYS_INIT(viper_init, PRE_KERNEL_1, 0);
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