[mirror_ubuntu-zesty-kernel.git] / drivers / pwm / pwm-lpss-pci.c

/*
 * 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"

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");
Commit	Line	Data
c558e39e AS	1	/*
	2	* Intel Low Power Subsystem PWM controller PCI driver
	3	*
	4	* Copyright (C) 2014, Intel Corporation
	5	*
	6	* Derived from the original pwm-lpss.c
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/pci.h>
f080be27	16	#include <linux/pm_runtime.h>
c558e39e AS	17
	18	#include "pwm-lpss.h"
	19
	20	static int pwm_lpss_probe_pci(struct pci_dev *pdev,
	21	const struct pci_device_id *id)
	22	{
	23	const struct pwm_lpss_boardinfo *info;
	24	struct pwm_lpss_chip *lpwm;
	25	int err;
	26
90927fe9	27	err = pcim_enable_device(pdev);
c558e39e AS	28	if (err < 0)
	29	return err;
	30
	31	info = (struct pwm_lpss_boardinfo *)id->driver_data;
	32	lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info);
	33	if (IS_ERR(lpwm))
	34	return PTR_ERR(lpwm);
	35
	36	pci_set_drvdata(pdev, lpwm);
f080be27 QZ	37
	38	pm_runtime_put(&pdev->dev);
	39	pm_runtime_allow(&pdev->dev);
	40
c558e39e AS	41	return 0;
	42	}
	43
	44	static void pwm_lpss_remove_pci(struct pci_dev *pdev)
	45	{
	46	struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
	47
f080be27 QZ	48	pm_runtime_forbid(&pdev->dev);
	49	pm_runtime_get_sync(&pdev->dev);
	50
c558e39e	51	pwm_lpss_remove(lpwm);
c558e39e AS	52	}
c558e39e AS	53
f080be27 QZ	54	#ifdef CONFIG_PM
	55	static int pwm_lpss_runtime_suspend_pci(struct device *dev)
	56	{
	57	/*
	58	* The PCI core will handle transition to D3 automatically. We only
	59	* need to provide runtime PM hooks for that to happen.
	60	*/
	61	return 0;
	62	}
	63
	64	static int pwm_lpss_runtime_resume_pci(struct device *dev)
	65	{
	66	return 0;
	67	}
	68	#endif
	69
	70	static const struct dev_pm_ops pwm_lpss_pci_pm = {
	71	SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci,
	72	pwm_lpss_runtime_resume_pci, NULL)
	73	};
	74
c558e39e	75	static const struct pci_device_id pwm_lpss_pci_ids[] = {
87219cb4	76	{ PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
c558e39e AS	77	{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
c558e39e AS	78	{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
b89b4b7a	79	{ PCI_VDEVICE(INTEL, 0x11a5), (unsigned long)&pwm_lpss_bxt_info},
87219cb4	80	{ PCI_VDEVICE(INTEL, 0x1ac8), (unsigned long)&pwm_lpss_bxt_info},
c558e39e AS	81	{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
c558e39e AS	82	{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_info},
03f00e53	83	{ PCI_VDEVICE(INTEL, 0x5ac8), (unsigned long)&pwm_lpss_bxt_info},
c558e39e AS	84	{ },
	85	};
	86	MODULE_DEVICE_TABLE(pci, pwm_lpss_pci_ids);
	87
	88	static struct pci_driver pwm_lpss_driver_pci = {
	89	.name = "pwm-lpss",
	90	.id_table = pwm_lpss_pci_ids,
	91	.probe = pwm_lpss_probe_pci,
	92	.remove = pwm_lpss_remove_pci,
f080be27 QZ	93	.driver = {
	94	.pm = &pwm_lpss_pci_pm,
	95	},
c558e39e AS	96	};
	97	module_pci_driver(pwm_lpss_driver_pci);
	98
	99	MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
	100	MODULE_LICENSE("GPL v2");