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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016 MediaTek Inc.
* Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <soc/mediatek/smi.h>
#include "mtk_mdp_comp.h"
void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp)
{
int i, err;
if (comp->larb_dev) {
err = mtk_smi_larb_get(comp->larb_dev);
if (err)
dev_err(dev,
"failed to get larb, err %d. type:%d\n",
err, comp->type);
}
for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
if (IS_ERR(comp->clk[i]))
continue;
err = clk_prepare_enable(comp->clk[i]);
if (err)
dev_err(dev,
"failed to enable clock, err %d. type:%d i:%d\n",
err, comp->type, i);
}
}
void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp)
{
int i;
for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
if (IS_ERR(comp->clk[i]))
continue;
clk_disable_unprepare(comp->clk[i]);
}
if (comp->larb_dev)
mtk_smi_larb_put(comp->larb_dev);
}
int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
struct mtk_mdp_comp *comp,
enum mtk_mdp_comp_type comp_type)
{
struct device_node *larb_node;
struct platform_device *larb_pdev;
int i;
comp->dev_node = of_node_get(node);
comp->type = comp_type;
for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
comp->clk[i] = of_clk_get(node, i);
if (IS_ERR(comp->clk[i])) {
if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER)
dev_err(dev, "Failed to get clock\n");
return PTR_ERR(comp->clk[i]);
}
/* Only RDMA needs two clocks */
if (comp->type != MTK_MDP_RDMA)
break;
}
/* Only DMA capable components need the LARB property */
comp->larb_dev = NULL;
if (comp->type != MTK_MDP_RDMA &&
comp->type != MTK_MDP_WDMA &&
comp->type != MTK_MDP_WROT)
return 0;
larb_node = of_parse_phandle(node, "mediatek,larb", 0);
if (!larb_node) {
dev_err(dev,
"Missing mediadek,larb phandle in %pOF node\n", node);
return -EINVAL;
}
larb_pdev = of_find_device_by_node(larb_node);
if (!larb_pdev) {
dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
of_node_put(larb_node);
return -EPROBE_DEFER;
}
of_node_put(larb_node);
comp->larb_dev = &larb_pdev->dev;
return 0;
}
void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp)
{
of_node_put(comp->dev_node);
}
|