1/*
 2 * Intel Low Power Subsystem PWM controller 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/acpi.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/pm_runtime.h>
18
19#include "pwm-lpss.h"
20
21/* BayTrail */
22static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
23	.clk_rate = 25000000,
24	.npwm = 1,
25	.base_unit_bits = 16,
26};
27
28/* Braswell */
29static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
30	.clk_rate = 19200000,
31	.npwm = 1,
32	.base_unit_bits = 16,
33};
34
35/* Broxton */
36static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = {
37	.clk_rate = 19200000,
38	.npwm = 4,
39	.base_unit_bits = 22,
40	.bypass = true,
41};
42
43static int pwm_lpss_probe_platform(struct platform_device *pdev)
44{
45	const struct pwm_lpss_boardinfo *info;
46	const struct acpi_device_id *id;
47	struct pwm_lpss_chip *lpwm;
48	struct resource *r;
49
50	id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
51	if (!id)
52		return -ENODEV;
53
54	info = (const struct pwm_lpss_boardinfo *)id->driver_data;
55	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
56
57	lpwm = pwm_lpss_probe(&pdev->dev, r, info);
58	if (IS_ERR(lpwm))
59		return PTR_ERR(lpwm);
60
61	platform_set_drvdata(pdev, lpwm);
62
63	pm_runtime_set_active(&pdev->dev);
64	pm_runtime_enable(&pdev->dev);
65
66	return 0;
67}
68
69static int pwm_lpss_remove_platform(struct platform_device *pdev)
70{
71	struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
72
73	pm_runtime_disable(&pdev->dev);
74	return pwm_lpss_remove(lpwm);
75}
76
77static const struct acpi_device_id pwm_lpss_acpi_match[] = {
78	{ "80860F09", (unsigned long)&pwm_lpss_byt_info },
79	{ "80862288", (unsigned long)&pwm_lpss_bsw_info },
80	{ "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
81	{ },
82};
83MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
84
85static struct platform_driver pwm_lpss_driver_platform = {
86	.driver = {
87		.name = "pwm-lpss",
88		.acpi_match_table = pwm_lpss_acpi_match,
89	},
90	.probe = pwm_lpss_probe_platform,
91	.remove = pwm_lpss_remove_platform,
92};
93module_platform_driver(pwm_lpss_driver_platform);
94
95MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
96MODULE_LICENSE("GPL v2");
97MODULE_ALIAS("platform:pwm-lpss");

 1/*
 2 * Intel Low Power Subsystem PWM controller 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/acpi.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/pm_runtime.h>
18
19#include "pwm-lpss.h"
20
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
21static int pwm_lpss_probe_platform(struct platform_device *pdev)
22{
23	const struct pwm_lpss_boardinfo *info;
24	const struct acpi_device_id *id;
25	struct pwm_lpss_chip *lpwm;
26	struct resource *r;
27
28	id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
29	if (!id)
30		return -ENODEV;
31
32	info = (const struct pwm_lpss_boardinfo *)id->driver_data;
33	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
34
35	lpwm = pwm_lpss_probe(&pdev->dev, r, info);
36	if (IS_ERR(lpwm))
37		return PTR_ERR(lpwm);
38
39	platform_set_drvdata(pdev, lpwm);
40
41	pm_runtime_set_active(&pdev->dev);
42	pm_runtime_enable(&pdev->dev);
43
44	return 0;
45}
46
47static int pwm_lpss_remove_platform(struct platform_device *pdev)
48{
49	struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
50
51	pm_runtime_disable(&pdev->dev);
52	return pwm_lpss_remove(lpwm);
53}
54
55static const struct acpi_device_id pwm_lpss_acpi_match[] = {
56	{ "80860F09", (unsigned long)&pwm_lpss_byt_info },
57	{ "80862288", (unsigned long)&pwm_lpss_bsw_info },
58	{ "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
59	{ },
60};
61MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
62
63static struct platform_driver pwm_lpss_driver_platform = {
64	.driver = {
65		.name = "pwm-lpss",
66		.acpi_match_table = pwm_lpss_acpi_match,
67	},
68	.probe = pwm_lpss_probe_platform,
69	.remove = pwm_lpss_remove_platform,
70};
71module_platform_driver(pwm_lpss_driver_platform);
72
73MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
74MODULE_LICENSE("GPL v2");
75MODULE_ALIAS("platform:pwm-lpss");