/* * Intel Low Power Subsystem PWM controller PCI driver * * Copyright (C) 2014, Intel Corporation * * Derived from the original pwm-lpss.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/pm_runtime.h> #include "pwm-lpss.h" /* BayTrail */ static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = { .clk_rate = 25000000, .npwm = 1, .base_unit_bits = 16, }; /* Braswell */ static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = { .clk_rate = 19200000, .npwm = 1, .base_unit_bits = 16, }; /* Broxton */ static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = { .clk_rate = 19200000, .npwm = 4, .base_unit_bits = 22, .bypass = true, }; /* Tangier */ static const struct pwm_lpss_boardinfo pwm_lpss_tng_info = { .clk_rate = 19200000, .npwm = 4, .base_unit_bits = 22, }; static int pwm_lpss_probe_pci(struct pci_dev *pdev, const struct pci_device_id *id) { const struct pwm_lpss_boardinfo *info; struct pwm_lpss_chip *lpwm; int err; err = pcim_enable_device(pdev); if (err < 0) return err; info = (struct pwm_lpss_boardinfo *)id->driver_data; lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info); if (IS_ERR(lpwm)) return PTR_ERR(lpwm); pci_set_drvdata(pdev, lpwm); pm_runtime_put(&pdev->dev); pm_runtime_allow(&pdev->dev); return 0; } static void pwm_lpss_remove_pci(struct pci_dev *pdev) { struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev); pm_runtime_forbid(&pdev->dev); pm_runtime_get_sync(&pdev->dev); pwm_lpss_remove(lpwm); } #ifdef CONFIG_PM static int pwm_lpss_runtime_suspend_pci(struct device *dev) { /* * The PCI core will handle transition to D3 automatically. We only * need to provide runtime PM hooks for that to happen. */ return 0; } static int pwm_lpss_runtime_resume_pci(struct device *dev) { return 0; } #endif static const struct dev_pm_ops pwm_lpss_pci_pm = { SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci, pwm_lpss_runtime_resume_pci, NULL) }; static const struct pci_device_id pwm_lpss_pci_ids[] = { { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info}, { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info}, { PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info}, { PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info}, { PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info}, { PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info}, { PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info}, { PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info}, { PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info}, { }, }; MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids); static struct pci_driver pwm_lpss_driver_pci = { .name = "pwm-lpss", .id_table = pwm_lpss_pci_ids, .probe = pwm_lpss_probe_pci, .remove = pwm_lpss_remove_pci, .driver = { .pm = &pwm_lpss_pci_pm, }, }; module_pci_driver(pwm_lpss_driver_pci); MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS"); MODULE_LICENSE("GPL v2");