1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Derived from linux/arch/mips/bcm63xx/clk.c:
5*4882a593Smuzhiyun * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <common.h>
11*4882a593Smuzhiyun #include <clk-uclass.h>
12*4882a593Smuzhiyun #include <dm.h>
13*4882a593Smuzhiyun #include <errno.h>
14*4882a593Smuzhiyun #include <asm/io.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define MAX_CLKS 32
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun struct bcm6345_clk_priv {
19*4882a593Smuzhiyun void __iomem *regs;
20*4882a593Smuzhiyun };
21*4882a593Smuzhiyun
bcm6345_clk_enable(struct clk * clk)22*4882a593Smuzhiyun static int bcm6345_clk_enable(struct clk *clk)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun if (clk->id >= MAX_CLKS)
27*4882a593Smuzhiyun return -EINVAL;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun setbits_be32(priv->regs, BIT(clk->id));
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun return 0;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
bcm6345_clk_disable(struct clk * clk)34*4882a593Smuzhiyun static int bcm6345_clk_disable(struct clk *clk)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (clk->id >= MAX_CLKS)
39*4882a593Smuzhiyun return -EINVAL;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun clrbits_be32(priv->regs, BIT(clk->id));
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun return 0;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun static struct clk_ops bcm6345_clk_ops = {
47*4882a593Smuzhiyun .disable = bcm6345_clk_disable,
48*4882a593Smuzhiyun .enable = bcm6345_clk_enable,
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun static const struct udevice_id bcm6345_clk_ids[] = {
52*4882a593Smuzhiyun { .compatible = "brcm,bcm6345-clk" },
53*4882a593Smuzhiyun { /* sentinel */ }
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
bcm63xx_clk_probe(struct udevice * dev)56*4882a593Smuzhiyun static int bcm63xx_clk_probe(struct udevice *dev)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun struct bcm6345_clk_priv *priv = dev_get_priv(dev);
59*4882a593Smuzhiyun fdt_addr_t addr;
60*4882a593Smuzhiyun fdt_size_t size;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun addr = devfdt_get_addr_size_index(dev, 0, &size);
63*4882a593Smuzhiyun if (addr == FDT_ADDR_T_NONE)
64*4882a593Smuzhiyun return -EINVAL;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun priv->regs = ioremap(addr, size);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun return 0;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun U_BOOT_DRIVER(clk_bcm6345) = {
72*4882a593Smuzhiyun .name = "clk_bcm6345",
73*4882a593Smuzhiyun .id = UCLASS_CLK,
74*4882a593Smuzhiyun .of_match = bcm6345_clk_ids,
75*4882a593Smuzhiyun .ops = &bcm6345_clk_ops,
76*4882a593Smuzhiyun .probe = bcm63xx_clk_probe,
77*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
78*4882a593Smuzhiyun };
79