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
|
/*
* drivers/gpu/nvgpu/gk20a/platform_gk20a_generic.c
*
* GK20A Generic Platform Interface
*
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include "platform_gk20a.h"
#include "hal_gk20a.h"
#include "gk20a.h"
/*
* gk20a_generic_get_clocks()
*
* This function finds clocks in tegra platform and populates
* the clock information to gk20a platform data.
*/
static int gk20a_generic_get_clocks(struct device *pdev)
{
struct gk20a_platform *platform = dev_get_drvdata(pdev);
platform->clk[0] = clk_get_sys("tegra_gk20a.0", "PLLG_ref");
platform->clk[1] = clk_get_sys("tegra_gk20a.0", "pwr");
platform->clk[2] = clk_get_sys("tegra_gk20a.0", "emc");
platform->num_clks = 3;
if (IS_ERR(platform->clk[0]) ||
IS_ERR(platform->clk[1]) ||
IS_ERR(platform->clk[2]))
goto err_get_clock;
clk_set_rate(platform->clk[0], UINT_MAX);
clk_set_rate(platform->clk[1], 204000000);
clk_set_rate(platform->clk[2], UINT_MAX);
return 0;
err_get_clock:
if (!IS_ERR_OR_NULL(platform->clk[0]))
clk_put(platform->clk[0]);
if (!IS_ERR_OR_NULL(platform->clk[1]))
clk_put(platform->clk[1]);
if (!IS_ERR_OR_NULL(platform->clk[2]))
clk_put(platform->clk[2]);
platform->clk[0] = NULL;
platform->clk[1] = NULL;
platform->clk[2] = NULL;
return -ENODEV;
}
static int gk20a_generic_probe(struct device *dev)
{
gk20a_generic_get_clocks(dev);
return 0;
}
static int gk20a_generic_late_probe(struct device *dev)
{
return 0;
}
static int gk20a_generic_remove(struct device *dev)
{
return 0;
}
struct gk20a_platform gk20a_generic_platform = {
.probe = gk20a_generic_probe,
.late_probe = gk20a_generic_late_probe,
.remove = gk20a_generic_remove,
.default_big_page_size = SZ_128K,
};
|
