// SPDX-License-Identifier: GPL-2.0-only /* * Intel Merrifield power button support * * (C) Copyright 2017 Intel Corporation * * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> */ #include <linux/init.h> #include <linux/ioport.h> #include <linux/platform_device.h> #include <linux/sfi.h> #include <asm/intel-mid.h> #include <asm/intel_scu_ipc.h> static struct resource mrfld_power_btn_resources[] = { { .flags = IORESOURCE_IRQ, }, }; static struct platform_device mrfld_power_btn_dev = { .name = "msic_power_btn", .id = PLATFORM_DEVID_NONE, .num_resources = ARRAY_SIZE(mrfld_power_btn_resources), .resource = mrfld_power_btn_resources, }; static int mrfld_power_btn_scu_status_change(struct notifier_block *nb, unsigned long code, void *data) { if (code == SCU_DOWN) { platform_device_unregister(&mrfld_power_btn_dev); return 0; } return platform_device_register(&mrfld_power_btn_dev); } static struct notifier_block mrfld_power_btn_scu_notifier = { .notifier_call = mrfld_power_btn_scu_status_change, }; static int __init register_mrfld_power_btn(void) { if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER) return -ENODEV; /* * We need to be sure that the SCU IPC is ready before * PMIC power button device can be registered: */ intel_scu_notifier_add(&mrfld_power_btn_scu_notifier); return 0; } arch_initcall(register_mrfld_power_btn); static void __init *mrfld_power_btn_platform_data(void *info) { struct resource *res = mrfld_power_btn_resources; struct sfi_device_table_entry *pentry = info; res->start = res->end = pentry->irq; return NULL; } static const struct devs_id mrfld_power_btn_dev_id __initconst = { .name = "bcove_power_btn", .type = SFI_DEV_TYPE_IPC, .delay = 1, .msic = 1, .get_platform_data = &mrfld_power_btn_platform_data, }; sfi_device(mrfld_power_btn_dev_id);