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/*
* 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,
};
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_bxt_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, 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");
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