1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* intel_bxtwc_tmu.c - Intel BXT Whiskey Cove PMIC TMU driver
*
* Copyright (C) 2016 Intel Corporation. All rights reserved.
*
* This driver adds TMU (Time Management Unit) support for Intel BXT platform.
* It enables the alarm wake-up functionality in the TMU unit of Whiskey Cove
* PMIC.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/intel_soc_pmic.h>
#define BXTWC_TMUIRQ 0x4fb6
#define BXTWC_MIRQLVL1 0x4e0e
#define BXTWC_MTMUIRQ_REG 0x4fb7
#define BXTWC_MIRQLVL1_MTMU BIT(1)
#define BXTWC_TMU_WK_ALRM BIT(1)
#define BXTWC_TMU_SYS_ALRM BIT(2)
#define BXTWC_TMU_ALRM_MASK (BXTWC_TMU_WK_ALRM | BXTWC_TMU_SYS_ALRM)
#define BXTWC_TMU_ALRM_IRQ (BXTWC_TMU_WK_ALRM | BXTWC_TMU_SYS_ALRM)
struct wcove_tmu {
int irq;
struct device *dev;
struct regmap *regmap;
};
static irqreturn_t bxt_wcove_tmu_irq_handler(int irq, void *data)
{
struct wcove_tmu *wctmu = data;
unsigned int tmu_irq;
/* Read TMU interrupt reg */
regmap_read(wctmu->regmap, BXTWC_TMUIRQ, &tmu_irq);
if (tmu_irq & BXTWC_TMU_ALRM_IRQ) {
/* clear TMU irq */
regmap_write(wctmu->regmap, BXTWC_TMUIRQ, tmu_irq);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static int bxt_wcove_tmu_probe(struct platform_device *pdev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
struct regmap_irq_chip_data *regmap_irq_chip;
struct wcove_tmu *wctmu;
int ret, virq, irq;
wctmu = devm_kzalloc(&pdev->dev, sizeof(*wctmu), GFP_KERNEL);
if (!wctmu)
return -ENOMEM;
wctmu->dev = &pdev->dev;
wctmu->regmap = pmic->regmap;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "invalid irq %d\n", irq);
return irq;
}
regmap_irq_chip = pmic->irq_chip_data_tmu;
virq = regmap_irq_get_virq(regmap_irq_chip, irq);
if (virq < 0) {
dev_err(&pdev->dev,
"failed to get virtual interrupt=%d\n", irq);
return virq;
}
ret = devm_request_threaded_irq(&pdev->dev, virq,
NULL, bxt_wcove_tmu_irq_handler,
IRQF_ONESHOT, "bxt_wcove_tmu", wctmu);
if (ret) {
dev_err(&pdev->dev, "request irq failed: %d,virq: %d\n",
ret, virq);
return ret;
}
wctmu->irq = virq;
/* Unmask TMU second level Wake & System alarm */
regmap_update_bits(wctmu->regmap, BXTWC_MTMUIRQ_REG,
BXTWC_TMU_ALRM_MASK, 0);
platform_set_drvdata(pdev, wctmu);
return 0;
}
static int bxt_wcove_tmu_remove(struct platform_device *pdev)
{
struct wcove_tmu *wctmu = platform_get_drvdata(pdev);
unsigned int val;
/* Mask TMU interrupts */
regmap_read(wctmu->regmap, BXTWC_MIRQLVL1, &val);
regmap_write(wctmu->regmap, BXTWC_MIRQLVL1,
val | BXTWC_MIRQLVL1_MTMU);
regmap_read(wctmu->regmap, BXTWC_MTMUIRQ_REG, &val);
regmap_write(wctmu->regmap, BXTWC_MTMUIRQ_REG,
val | BXTWC_TMU_ALRM_MASK);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int bxtwc_tmu_suspend(struct device *dev)
{
struct wcove_tmu *wctmu = dev_get_drvdata(dev);
enable_irq_wake(wctmu->irq);
return 0;
}
static int bxtwc_tmu_resume(struct device *dev)
{
struct wcove_tmu *wctmu = dev_get_drvdata(dev);
disable_irq_wake(wctmu->irq);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(bxtwc_tmu_pm_ops, bxtwc_tmu_suspend, bxtwc_tmu_resume);
static const struct platform_device_id bxt_wcove_tmu_id_table[] = {
{ .name = "bxt_wcove_tmu" },
{},
};
MODULE_DEVICE_TABLE(platform, bxt_wcove_tmu_id_table);
static struct platform_driver bxt_wcove_tmu_driver = {
.probe = bxt_wcove_tmu_probe,
.remove = bxt_wcove_tmu_remove,
.driver = {
.name = "bxt_wcove_tmu",
.pm = &bxtwc_tmu_pm_ops,
},
.id_table = bxt_wcove_tmu_id_table,
};
module_platform_driver(bxt_wcove_tmu_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Nilesh Bacchewar <nilesh.bacchewar@intel.com>");
MODULE_DESCRIPTION("BXT Whiskey Cove TMU Driver");
|
