linux-imx

/*

 * 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,

    .other_devices_aml_touches_pwm_regs = true,

};

​

/* Broxton */

static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = {

    .clk_rate = 19200000,

    .npwm = 4,

    .base_unit_bits = 22,

    .bypass = true,

};

​

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);

​