1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Intel MID platform PM support 4 * 5 * Copyright (C) 2016, Intel Corporation 6 * 7 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 8 */ 9 10 #include <linux/init.h> 11 #include <linux/pci.h> 12 13 #include <asm/cpu_device_id.h> 14 #include <asm/intel-family.h> 15 #include <asm/intel-mid.h> 16 17 #include "pci.h" 18 19 static bool pci_mid_pm_enabled __read_mostly; 20 21 bool pci_use_mid_pm(void) 22 { 23 return pci_mid_pm_enabled; 24 } 25 26 int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state) 27 { 28 return intel_mid_pci_set_power_state(pdev, state); 29 } 30 31 pci_power_t mid_pci_get_power_state(struct pci_dev *pdev) 32 { 33 return intel_mid_pci_get_power_state(pdev); 34 } 35 36 /* 37 * This table should be in sync with the one in 38 * arch/x86/platform/intel-mid/pwr.c. 39 */ 40 static const struct x86_cpu_id lpss_cpu_ids[] = { 41 X86_MATCH_VFM(INTEL_ATOM_SALTWELL_MID, NULL), 42 X86_MATCH_VFM(INTEL_ATOM_SILVERMONT_MID, NULL), 43 {} 44 }; 45 46 static int __init mid_pci_init(void) 47 { 48 const struct x86_cpu_id *id; 49 50 id = x86_match_cpu(lpss_cpu_ids); 51 if (id) 52 pci_mid_pm_enabled = true; 53 54 return 0; 55 } 56 arch_initcall(mid_pci_init); 57