blob: 93603fa82584a9f2016b502c6b1aa121b13df339 [file] [log] [blame]
Álvaro Fernández Rojas5357eb92017-05-07 20:13:01 +02001/*
2 * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
3 *
4 * Derived from linux/arch/mips/bcm63xx/clk.c:
5 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10#include <common.h>
11#include <clk-uclass.h>
12#include <dm.h>
13#include <errno.h>
14#include <asm/io.h>
15
16#define MAX_CLKS 32
17
18struct bcm6345_clk_priv {
19 void __iomem *regs;
20};
21
22static int bcm6345_clk_enable(struct clk *clk)
23{
24 struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
25
26 if (clk->id >= MAX_CLKS)
27 return -EINVAL;
28
29 setbits_be32(priv->regs, BIT(clk->id));
30
31 return 0;
32}
33
34static int bcm6345_clk_disable(struct clk *clk)
35{
36 struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
37
38 if (clk->id >= MAX_CLKS)
39 return -EINVAL;
40
41 clrbits_be32(priv->regs, BIT(clk->id));
42
43 return 0;
44}
45
46static struct clk_ops bcm6345_clk_ops = {
47 .disable = bcm6345_clk_disable,
48 .enable = bcm6345_clk_enable,
49};
50
51static const struct udevice_id bcm6345_clk_ids[] = {
52 { .compatible = "brcm,bcm6345-clk" },
53 { /* sentinel */ }
54};
55
56static int bcm63xx_clk_probe(struct udevice *dev)
57{
58 struct bcm6345_clk_priv *priv = dev_get_priv(dev);
59 fdt_addr_t addr;
60 fdt_size_t size;
61
Simon Glassa821c4a2017-05-17 17:18:05 -060062 addr = devfdt_get_addr_size_index(dev, 0, &size);
Álvaro Fernández Rojas5357eb92017-05-07 20:13:01 +020063 if (addr == FDT_ADDR_T_NONE)
64 return -EINVAL;
65
66 priv->regs = ioremap(addr, size);
67
68 return 0;
69}
70
71U_BOOT_DRIVER(clk_bcm6345) = {
72 .name = "clk_bcm6345",
73 .id = UCLASS_CLK,
74 .of_match = bcm6345_clk_ids,
75 .ops = &bcm6345_clk_ops,
76 .probe = bcm63xx_clk_probe,
77 .priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
78};