clk-fixed-factor.c
1.93 KB
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
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 DENX Software Engineering
* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
*
* Copyright (C) 2011 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
*/
#include <common.h>
#include <malloc.h>
#include <clk-uclass.h>
#include <dm/device.h>
#include <dm/devres.h>
#include <linux/clk-provider.h>
#include <div64.h>
#include <clk.h>
#include "clk.h"
#include <linux/err.h>
#define UBOOT_DM_CLK_IMX_FIXED_FACTOR "ccf_clk_fixed_factor"
static ulong clk_factor_recalc_rate(struct clk *clk)
{
struct clk_fixed_factor *fix =
to_clk_fixed_factor(dev_get_clk_ptr(clk->dev));
unsigned long parent_rate = clk_get_parent_rate(clk);
unsigned long long int rate;
rate = (unsigned long long int)parent_rate * fix->mult;
do_div(rate, fix->div);
return (ulong)rate;
}
const struct clk_ops ccf_clk_fixed_factor_ops = {
.get_rate = clk_factor_recalc_rate,
};
struct clk *clk_hw_register_fixed_factor(struct device *dev,
const char *name, const char *parent_name, unsigned long flags,
unsigned int mult, unsigned int div)
{
struct clk_fixed_factor *fix;
struct clk *clk;
int ret;
fix = kzalloc(sizeof(*fix), GFP_KERNEL);
if (!fix)
return ERR_PTR(-ENOMEM);
/* struct clk_fixed_factor assignments */
fix->mult = mult;
fix->div = div;
clk = &fix->clk;
ret = clk_register(clk, UBOOT_DM_CLK_IMX_FIXED_FACTOR, name,
parent_name);
if (ret) {
kfree(fix);
return ERR_PTR(ret);
}
return clk;
}
struct clk *clk_register_fixed_factor(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
unsigned int mult, unsigned int div)
{
struct clk *clk;
clk = clk_hw_register_fixed_factor(dev, name, parent_name, flags, mult,
div);
if (IS_ERR(clk))
return ERR_CAST(clk);
return clk;
}
U_BOOT_DRIVER(imx_clk_fixed_factor) = {
.name = UBOOT_DM_CLK_IMX_FIXED_FACTOR,
.id = UCLASS_CLK,
.ops = &ccf_clk_fixed_factor_ops,
.flags = DM_FLAG_PRE_RELOC,
};