| /* |
| * Intel Merrifield legacy RTC initialization file |
| * |
| * (C) Copyright 2017 Intel Corporation |
| * |
| * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; version 2 |
| * of the License. |
| */ |
| |
| #include <linux/init.h> |
| |
| #include <asm/hw_irq.h> |
| #include <asm/intel-mid.h> |
| #include <asm/io_apic.h> |
| #include <asm/time.h> |
| #include <asm/x86_init.h> |
| |
| static int __init mrfld_legacy_rtc_alloc_irq(void) |
| { |
| struct irq_alloc_info info; |
| int ret; |
| |
| if (!x86_platform.legacy.rtc) |
| return -ENODEV; |
| |
| ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, 0); |
| ret = mp_map_gsi_to_irq(RTC_IRQ, IOAPIC_MAP_ALLOC, &info); |
| if (ret < 0) { |
| pr_info("Failed to allocate RTC interrupt. Disabling RTC\n"); |
| x86_platform.legacy.rtc = 0; |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int __init mrfld_legacy_rtc_init(void) |
| { |
| if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER) |
| return -ENODEV; |
| |
| return mrfld_legacy_rtc_alloc_irq(); |
| } |
| arch_initcall(mrfld_legacy_rtc_init); |
