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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics 2022 - All Rights Reserved
* Author: Gabriel Fernandez <gabriel.fernandez@foss.st.com> for STMicroelectronics.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "clk-stm32-core.h"
#include "reset-stm32.h"
static DEFINE_SPINLOCK(rlock);
static int stm32_rcc_clock_init(struct device *dev,
const struct of_device_id *match,
void __iomem *base)
{
const struct stm32_rcc_match_data *data = match->data;
struct clk_hw_onecell_data *clk_data = data->hw_clks;
struct device_node *np = dev_of_node(dev);
struct clk_hw **hws;
int n, max_binding;
max_binding = data->maxbinding;
clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, max_binding), GFP_KERNEL);
if (!clk_data)
return -ENOMEM;
clk_data->num = max_binding;
hws = clk_data->hws;
for (n = 0; n < max_binding; n++)
hws[n] = ERR_PTR(-ENOENT);
for (n = 0; n < data->num_clocks; n++) {
const struct clock_config *cfg_clock = &data->tab_clocks[n];
struct clk_hw *hw = ERR_PTR(-ENOENT);
if (cfg_clock->func)
hw = (*cfg_clock->func)(dev, data, base, &rlock,
cfg_clock);
if (IS_ERR(hw)) {
dev_err(dev, "Can't register clk %d: %ld\n", n,
PTR_ERR(hw));
return PTR_ERR(hw);
}
if (cfg_clock->id != NO_ID)
hws[cfg_clock->id] = hw;
}
return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
}
int stm32_rcc_init(struct device *dev, const struct of_device_id *match_data,
void __iomem *base)
{
const struct of_device_id *match;
int err;
match = of_match_node(match_data, dev_of_node(dev));
if (!match) {
dev_err(dev, "match data not found\n");
return -ENODEV;
}
/* RCC Reset Configuration */
err = stm32_rcc_reset_init(dev, match, base);
if (err) {
pr_err("stm32 reset failed to initialize\n");
return err;
}
/* RCC Clock Configuration */
err = stm32_rcc_clock_init(dev, match, base);
if (err) {
pr_err("stm32 clock failed to initialize\n");
return err;
}
return 0;
}
|
