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
|
/*
* Samsung EXYNOS SoC series Display Port PHY driver
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* Author: Jingoo Han <jg1.han@samsung.com>
*
* 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/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/exynos5-pmu.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
struct exynos_dp_video_phy_drvdata {
u32 phy_ctrl_offset;
};
struct exynos_dp_video_phy {
struct regmap *regs;
const struct exynos_dp_video_phy_drvdata *drvdata;
};
static void exynos_dp_video_phy_pwr_isol(struct exynos_dp_video_phy *state,
unsigned int on)
{
unsigned int val;
if (IS_ERR(state->regs))
return;
val = on ? 0 : EXYNOS5_PHY_ENABLE;
regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
EXYNOS5_PHY_ENABLE, val);
}
static int exynos_dp_video_phy_power_on(struct phy *phy)
{
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
/* Disable power isolation on DP-PHY */
exynos_dp_video_phy_pwr_isol(state, 0);
return 0;
}
static int exynos_dp_video_phy_power_off(struct phy *phy)
{
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
/* Enable power isolation on DP-PHY */
exynos_dp_video_phy_pwr_isol(state, 1);
return 0;
}
static struct phy_ops exynos_dp_video_phy_ops = {
.power_on = exynos_dp_video_phy_power_on,
.power_off = exynos_dp_video_phy_power_off,
.owner = THIS_MODULE,
};
static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = {
.phy_ctrl_offset = EXYNOS5_DPTX_PHY_CONTROL,
};
static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = {
.phy_ctrl_offset = EXYNOS5420_DPTX_PHY_CONTROL,
};
static const struct of_device_id exynos_dp_video_phy_of_match[] = {
{
.compatible = "samsung,exynos5250-dp-video-phy",
.data = &exynos5250_dp_video_phy,
}, {
.compatible = "samsung,exynos5420-dp-video-phy",
.data = &exynos5420_dp_video_phy,
},
{ },
};
MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
static int exynos_dp_video_phy_probe(struct platform_device *pdev)
{
struct exynos_dp_video_phy *state;
struct device *dev = &pdev->dev;
const struct of_device_id *match;
struct phy_provider *phy_provider;
struct phy *phy;
state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
if (!state)
return -ENOMEM;
state->regs = syscon_regmap_lookup_by_phandle(dev->of_node,
"samsung,pmu-syscon");
if (IS_ERR(state->regs)) {
dev_err(dev, "Failed to lookup PMU regmap\n");
return PTR_ERR(state->regs);
}
match = of_match_node(exynos_dp_video_phy_of_match, dev->of_node);
state->drvdata = match->data;
phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops, NULL);
if (IS_ERR(phy)) {
dev_err(dev, "failed to create Display Port PHY\n");
return PTR_ERR(phy);
}
phy_set_drvdata(phy, state);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}
static struct platform_driver exynos_dp_video_phy_driver = {
.probe = exynos_dp_video_phy_probe,
.driver = {
.name = "exynos-dp-video-phy",
.of_match_table = exynos_dp_video_phy_of_match,
}
};
module_platform_driver(exynos_dp_video_phy_driver);
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
MODULE_DESCRIPTION("Samsung EXYNOS SoC DP PHY driver");
MODULE_LICENSE("GPL v2");
|
