blob: 3b26c7ae2233362ece6fa60dbad074795a5e1954 (
plain)
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
|
/*
* arch/arm/mach-tegra/csi.c
*
* Copyright (C) 2010-2011 NVIDIA Corporation.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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/kernel.h>
#include <linux/string.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <mach/iomap.h>
#include <mach/csi.h>
#include "clock.h"
static struct clk *vi_clk;
static struct clk *csi_clk;
int tegra_vi_csi_writel(u32 val, u32 offset)
{
if (vi_clk == NULL) {
vi_clk = tegra_get_clock_by_name("vi");
if (IS_ERR_OR_NULL(vi_clk)) {
pr_err("vi: can't get vi clock\n");
return -EINVAL;
}
}
clk_enable(vi_clk);
if (csi_clk == NULL) {
csi_clk = tegra_get_clock_by_name("csi");
if (IS_ERR_OR_NULL(csi_clk)) {
pr_err("csi: can't get csi clock\n");
return -EINVAL;
}
}
clk_enable(csi_clk);
writel(val, IO_TO_VIRT(TEGRA_VI_BASE) + offset * 4);
clk_disable(csi_clk);
clk_disable(vi_clk);
return 0;
}
int tegra_vi_csi_readl(u32 offset, u32 *val)
{
if (vi_clk == NULL) {
vi_clk = tegra_get_clock_by_name("vi");
if (IS_ERR_OR_NULL(vi_clk)) {
pr_err("vi: can't get vi clock\n");
return -EINVAL;
}
}
clk_enable(vi_clk);
if (csi_clk == NULL) {
csi_clk = tegra_get_clock_by_name("csi");
if (IS_ERR_OR_NULL(csi_clk)) {
pr_err("csi: can't get csi clock\n");
return -EINVAL;
}
}
clk_enable(csi_clk);
*val = readl(IO_TO_VIRT(TEGRA_VI_BASE) + offset * 4);
clk_disable(csi_clk);
clk_disable(vi_clk);
return 0;
}
|
