projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 910a26f6 AS |
2 | /* |
| 3 | * Intel Merrifield legacy RTC initialization file | |
| 4 | * | |
| 5 | * (C) Copyright 2017 Intel Corporation | |
| 6 | * | |
| 7 | * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> | |
| 910a26f6 AS |
8 | */ |
| 9 | ||
| 10 | #include <linux/init.h> | |
| 11 | ||
| 12 | #include <asm/hw_irq.h> | |
| 13 | #include <asm/intel-mid.h> | |
| 14 | #include <asm/io_apic.h> | |
| 15 | #include <asm/time.h> | |
| 16 | #include <asm/x86_init.h> | |
| 17 | ||
| 18 | static int __init mrfld_legacy_rtc_alloc_irq(void) | |
| 19 | { | |
| 20 | struct irq_alloc_info info; | |
| 21 | int ret; | |
| 22 | ||
| 23 | if (!x86_platform.legacy.rtc) | |
| 24 | return -ENODEV; | |
| 25 | ||
| 26 | ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, 0); | |
| 27 | ret = mp_map_gsi_to_irq(RTC_IRQ, IOAPIC_MAP_ALLOC, &info); | |
| 28 | if (ret < 0) { | |
| 29 | pr_info("Failed to allocate RTC interrupt. Disabling RTC\n"); | |
| 30 | x86_platform.legacy.rtc = 0; | |
| 31 | return ret; | |
| 32 | } | |
| 33 | ||
| 34 | return 0; | |
| 35 | } | |
| 36 | ||
| 37 | static int __init mrfld_legacy_rtc_init(void) | |
| 38 | { | |
| 39 | if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER) | |
| 40 | return -ENODEV; | |
| 41 | ||
| 42 | return mrfld_legacy_rtc_alloc_irq(); | |
| 43 | } | |
| 44 | arch_initcall(mrfld_legacy_rtc_init); |