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127 lines
3.0 KiB
127 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Intel Low Power Subsystem PWM controller PCI driver |
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* |
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* Copyright (C) 2014, Intel Corporation |
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* |
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* Derived from the original pwm-lpss.c |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/pm_runtime.h> |
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#include "pwm-lpss.h" |
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/* BayTrail */ |
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static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = { |
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.clk_rate = 25000000, |
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.npwm = 1, |
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.base_unit_bits = 16, |
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}; |
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/* Braswell */ |
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static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = { |
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.clk_rate = 19200000, |
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.npwm = 1, |
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.base_unit_bits = 16, |
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}; |
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/* Broxton */ |
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static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = { |
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.clk_rate = 19200000, |
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.npwm = 4, |
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.base_unit_bits = 22, |
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.bypass = true, |
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}; |
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/* Tangier */ |
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static const struct pwm_lpss_boardinfo pwm_lpss_tng_info = { |
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.clk_rate = 19200000, |
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.npwm = 4, |
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.base_unit_bits = 22, |
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}; |
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static int pwm_lpss_probe_pci(struct pci_dev *pdev, |
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const struct pci_device_id *id) |
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{ |
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const struct pwm_lpss_boardinfo *info; |
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struct pwm_lpss_chip *lpwm; |
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int err; |
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err = pcim_enable_device(pdev); |
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if (err < 0) |
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return err; |
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info = (struct pwm_lpss_boardinfo *)id->driver_data; |
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lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info); |
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if (IS_ERR(lpwm)) |
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return PTR_ERR(lpwm); |
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pci_set_drvdata(pdev, lpwm); |
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pm_runtime_put(&pdev->dev); |
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pm_runtime_allow(&pdev->dev); |
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return 0; |
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} |
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static void pwm_lpss_remove_pci(struct pci_dev *pdev) |
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{ |
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struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev); |
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pm_runtime_forbid(&pdev->dev); |
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pm_runtime_get_sync(&pdev->dev); |
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pwm_lpss_remove(lpwm); |
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} |
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#ifdef CONFIG_PM |
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static int pwm_lpss_runtime_suspend_pci(struct device *dev) |
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{ |
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/* |
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* The PCI core will handle transition to D3 automatically. We only |
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* need to provide runtime PM hooks for that to happen. |
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*/ |
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return 0; |
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} |
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static int pwm_lpss_runtime_resume_pci(struct device *dev) |
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{ |
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return 0; |
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} |
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#endif |
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static const struct dev_pm_ops pwm_lpss_pci_pm = { |
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SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci, |
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pwm_lpss_runtime_resume_pci, NULL) |
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}; |
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static const struct pci_device_id pwm_lpss_pci_ids[] = { |
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{ PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info}, |
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{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info}, |
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{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info}, |
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{ PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_tng_info}, |
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{ PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info}, |
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{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info}, |
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{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info}, |
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{ PCI_VDEVICE(INTEL, 0x31c8), (unsigned long)&pwm_lpss_bxt_info}, |
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{ PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids); |
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static struct pci_driver pwm_lpss_driver_pci = { |
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.name = "pwm-lpss", |
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.id_table = pwm_lpss_pci_ids, |
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.probe = pwm_lpss_probe_pci, |
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.remove = pwm_lpss_remove_pci, |
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.driver = { |
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.pm = &pwm_lpss_pci_pm, |
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}, |
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}; |
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module_pci_driver(pwm_lpss_driver_pci); |
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MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS"); |
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MODULE_LICENSE("GPL v2");
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