// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel Merrifield legacy RTC initialization file
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*
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* (C) Copyright 2017 Intel Corporation
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*
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* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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*/
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#include <linux/init.h>
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#include <asm/hw_irq.h>
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#include <asm/intel-mid.h>
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#include <asm/io_apic.h>
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#include <asm/time.h>
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#include <asm/x86_init.h>
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static int __init mrfld_legacy_rtc_alloc_irq(void)
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{
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struct irq_alloc_info info;
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int ret;
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if (!x86_platform.legacy.rtc)
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return -ENODEV;
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ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, 0);
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ret = mp_map_gsi_to_irq(RTC_IRQ, IOAPIC_MAP_ALLOC, &info);
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if (ret < 0) {
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pr_info("Failed to allocate RTC interrupt. Disabling RTC\n");
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x86_platform.legacy.rtc = 0;
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return ret;
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}
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return 0;
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}
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static int __init mrfld_legacy_rtc_init(void)
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{
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if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER)
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return -ENODEV;
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return mrfld_legacy_rtc_alloc_irq();
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}
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arch_initcall(mrfld_legacy_rtc_init);
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