mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
9900073cf5
The PWM LPSS probe drivers just pass a pointer to the exported board info structures to pwm_lpss_probe() based on device PCI or ACPI ID. In order to remove the knowledge of specific devices from library part of the driver and reduce noise in exported namespace just duplicate the board info structures and stop exporting them. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/*
|
|
* 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 <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_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);
|
|
|
|
pm_runtime_set_active(&pdev->dev);
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pwm_lpss_remove_platform(struct platform_device *pdev)
|
|
{
|
|
struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
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 },
|
|
{ "80865AC8", (unsigned long)&pwm_lpss_bxt_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");
|