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pwm: lpss: Properly split driver to parts 

The driver consists of core, PCI, and platform parts. It would be better
to split them into separate files.

The platform driver is now called pwm-lpss-platform. Thus, previously
set CONFIG_PWM_LPSS=m is not enough to build it. But we are on the safe
side since it seems no one from outside Intel is using it for now.

While here, move to use macros module_pci_driver() and
module_platform_driver().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Alan Cox <alan@linux.intel.com>
[thierry.reding: change select to depends on PWM_LPSS, cleanup]
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Andy Shevchenko 2014-08-19 19:17:35 +03:00 committed by Thierry Reding
parent 373c57829a
commit c558e39e14
6 changed files with 195 additions and 127 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/pwm/Kconfig
View File

@ -150,7 +150,6 @@ config PWM_LPC32XX
config PWM_LPSS
tristate "Intel LPSS PWM support"
depends on ACPI
help
Generic PWM framework driver for Intel Low Power Subsystem PWM
controller.
@ -158,6 +157,24 @@ config PWM_LPSS
To compile this driver as a module, choose M here: the module
will be called pwm-lpss.
config PWM_LPSS_PCI
tristate "Intel LPSS PWM PCI driver"
depends on PWM_LPSS && PCI
help
The PCI driver for Intel Low Power Subsystem PWM controller.
To compile this driver as a module, choose M here: the module
will be called pwm-lpss-pci.
config PWM_LPSS_PLATFORM
tristate "Intel LPSS PWM platform driver"
depends on PWM_LPSS && ACPI
help
The platform driver for Intel Low Power Subsystem PWM controller.
To compile this driver as a module, choose M here: the module
will be called pwm-lpss-platform.
config PWM_MXS
tristate "Freescale MXS PWM support"
depends on ARCH_MXS && OF

2
drivers/pwm/Makefile
View File

@ -13,6 +13,8 @@ obj-$(CONFIG_PWM_JZ4740) += pwm-jz4740.o
obj-$(CONFIG_PWM_LP3943) += pwm-lp3943.o
obj-$(CONFIG_PWM_LPC32XX) += pwm-lpc32xx.o
obj-$(CONFIG_PWM_LPSS) += pwm-lpss.o
obj-$(CONFIG_PWM_LPSS_PCI) += pwm-lpss-pci.o
obj-$(CONFIG_PWM_LPSS_PLATFORM) += pwm-lpss-platform.o
obj-$(CONFIG_PWM_MXS) += pwm-mxs.o
obj-$(CONFIG_PWM_PCA9685) += pwm-pca9685.o
obj-$(CONFIG_PWM_PUV3) += pwm-puv3.o

65
drivers/pwm/pwm-lpss-pci.c Normal file
View File

@ -0,0 +1,65 @@
/*
* 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 "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 = pci_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);
return 0;
}
static void pwm_lpss_remove_pci(struct pci_dev *pdev)
{
struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
pwm_lpss_remove(lpwm);
pci_disable_device(pdev);
}
static const struct pci_device_id pwm_lpss_pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&pwm_lpss_byt_info},
{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&pwm_lpss_bsw_info},
{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&pwm_lpss_bsw_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,
};
module_pci_driver(pwm_lpss_driver_pci);
MODULE_DESCRIPTION("PWM PCI driver for Intel LPSS");
MODULE_LICENSE("GPL v2");

68
drivers/pwm/pwm-lpss-platform.c Normal file
View File

@ -0,0 +1,68 @@
/*
* Intel Low Power Subsystem PWM controller 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/acpi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "pwm-lpss.h"
static int pwm_lpss_probe_platform(struct platform_device *pdev)
{
const struct pwm_lpss_boardinfo *info;
const struct acpi_device_id *id;
struct pwm_lpss_chip *lpwm;
struct resource *r;
id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
if (!id)
return -ENODEV;
info = (const struct pwm_lpss_boardinfo *)id->driver_data;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
lpwm = pwm_lpss_probe(&pdev->dev, r, info);
if (IS_ERR(lpwm))
return PTR_ERR(lpwm);
platform_set_drvdata(pdev, lpwm);
return 0;
}
static int pwm_lpss_remove_platform(struct platform_device *pdev)
{
struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
return pwm_lpss_remove(lpwm);
}
static const struct acpi_device_id pwm_lpss_acpi_match[] = {
{ "80860F09", (unsigned long)&pwm_lpss_byt_info },
{ "80862288", (unsigned long)&pwm_lpss_bsw_info },
{ },
};
MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
static struct platform_driver pwm_lpss_driver_platform = {
.driver = {
.name = "pwm-lpss",
.acpi_match_table = pwm_lpss_acpi_match,
},
.probe = pwm_lpss_probe_platform,
.remove = pwm_lpss_remove_platform,
};
module_platform_driver(pwm_lpss_driver_platform);
MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:pwm-lpss");

136
drivers/pwm/pwm-lpss.c
View File

@ -13,15 +13,10 @@
* published by the Free Software Foundation.
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pwm.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
static int pci_drv, plat_drv; /* So we know which drivers registered */
#include "pwm-lpss.h"
#define PWM 0x00000000
#define PWM_ENABLE BIT(31)
@ -39,19 +34,17 @@ struct pwm_lpss_chip {
unsigned long clk_rate;
};
struct pwm_lpss_boardinfo {
unsigned long clk_rate;
};
/* BayTrail */
static const struct pwm_lpss_boardinfo byt_info = {
const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
25000000
};
EXPORT_SYMBOL_GPL(pwm_lpss_byt_info);
/* Braswell */
static const struct pwm_lpss_boardinfo bsw_info = {
const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
19200000
};
EXPORT_SYMBOL_GPL(pwm_lpss_bsw_info);
static inline struct pwm_lpss_chip *to_lpwm(struct pwm_chip *chip)
{
@ -123,9 +116,8 @@ static const struct pwm_ops pwm_lpss_ops = {
.owner = THIS_MODULE,
};
static struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev,
struct resource *r,
const struct pwm_lpss_boardinfo *info)
struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
const struct pwm_lpss_boardinfo *info)
{
struct pwm_lpss_chip *lpwm;
int ret;
@ -152,8 +144,9 @@ static struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev,
return lpwm;
}
EXPORT_SYMBOL_GPL(pwm_lpss_probe);
static int pwm_lpss_remove(struct pwm_lpss_chip *lpwm)
int pwm_lpss_remove(struct pwm_lpss_chip *lpwm)
{
u32 ctrl;
@ -162,117 +155,8 @@ static int pwm_lpss_remove(struct pwm_lpss_chip *lpwm)
return pwmchip_remove(&lpwm->chip);
}
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 = pci_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);
return 0;
}
static void pwm_lpss_remove_pci(struct pci_dev *pdev)
{
struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
pwm_lpss_remove(lpwm);
pci_disable_device(pdev);
}
static struct pci_device_id pwm_lpss_pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&byt_info},
{ PCI_VDEVICE(INTEL, 0x0f09), (unsigned long)&byt_info},
{ PCI_VDEVICE(INTEL, 0x2288), (unsigned long)&bsw_info},
{ PCI_VDEVICE(INTEL, 0x2289), (unsigned long)&bsw_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,
};
static int pwm_lpss_probe_platform(struct platform_device *pdev)
{
const struct pwm_lpss_boardinfo *info;
const struct acpi_device_id *id;
struct pwm_lpss_chip *lpwm;
struct resource *r;
id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
if (!id)
return -ENODEV;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
info = (struct pwm_lpss_boardinfo *)id->driver_data;
lpwm = pwm_lpss_probe(&pdev->dev, r, info);
if (IS_ERR(lpwm))
return PTR_ERR(lpwm);
platform_set_drvdata(pdev, lpwm);
return 0;
}
static int pwm_lpss_remove_platform(struct platform_device *pdev)
{
struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
return pwm_lpss_remove(lpwm);
}
static const struct acpi_device_id pwm_lpss_acpi_match[] = {
{ "80860F09", (unsigned long)&byt_info },
{ "80862288", (unsigned long)&bsw_info },
{ },
};
MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
static struct platform_driver pwm_lpss_driver_platform = {
.driver = {
.name = "pwm-lpss",
.acpi_match_table = pwm_lpss_acpi_match,
},
.probe = pwm_lpss_probe_platform,
.remove = pwm_lpss_remove_platform,
};
static int __init pwm_init(void)
{
pci_drv = pci_register_driver(&pwm_lpss_driver_pci);
plat_drv = platform_driver_register(&pwm_lpss_driver_platform);
if (pci_drv && plat_drv)
return pci_drv;
return 0;
}
module_init(pwm_init);
static void __exit pwm_exit(void)
{
if (!pci_drv)
pci_unregister_driver(&pwm_lpss_driver_pci);
if (!plat_drv)
platform_driver_unregister(&pwm_lpss_driver_platform);
}
module_exit(pwm_exit);
EXPORT_SYMBOL_GPL(pwm_lpss_remove);
MODULE_DESCRIPTION("PWM driver for Intel LPSS");
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:pwm-lpss");

32
drivers/pwm/pwm-lpss.h Normal file
View File

@ -0,0 +1,32 @@
/*
* Intel Low Power Subsystem PWM controller 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.
*/
#ifndef __PWM_LPSS_H
#define __PWM_LPSS_H
#include <linux/device.h>
#include <linux/pwm.h>
struct pwm_lpss_chip;
struct pwm_lpss_boardinfo {
unsigned long clk_rate;
};
extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info;
extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info;
struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
const struct pwm_lpss_boardinfo *info);
int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
#endif /* __PWM_LPSS_H */