// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* Intel Low Power Subsystem PWM controller PCI driver
|
*
|
* Copyright (C) 2014, Intel Corporation
|
*
|
* Derived from the original pwm-lpss.c
|
*/
|
|
#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");
|
