clk_bcm6345.c
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/*
* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
*
* Derived from linux/arch/mips/bcm63xx/clk.c:
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <errno.h>
#include <asm/io.h>
#define MAX_CLKS 32
struct bcm6345_clk_priv {
void __iomem *regs;
};
static int bcm6345_clk_enable(struct clk *clk)
{
struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
if (clk->id >= MAX_CLKS)
return -EINVAL;
setbits_be32(priv->regs, BIT(clk->id));
return 0;
}
static int bcm6345_clk_disable(struct clk *clk)
{
struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
if (clk->id >= MAX_CLKS)
return -EINVAL;
clrbits_be32(priv->regs, BIT(clk->id));
return 0;
}
static struct clk_ops bcm6345_clk_ops = {
.disable = bcm6345_clk_disable,
.enable = bcm6345_clk_enable,
};
static const struct udevice_id bcm6345_clk_ids[] = {
{ .compatible = "brcm,bcm6345-clk" },
{ /* sentinel */ }
};
static int bcm63xx_clk_probe(struct udevice *dev)
{
struct bcm6345_clk_priv *priv = dev_get_priv(dev);
fdt_addr_t addr;
fdt_size_t size;
addr = devfdt_get_addr_size_index(dev, 0, &size);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
priv->regs = ioremap(addr, size);
return 0;
}
U_BOOT_DRIVER(clk_bcm6345) = {
.name = "clk_bcm6345",
.id = UCLASS_CLK,
.of_match = bcm6345_clk_ids,
.ops = &bcm6345_clk_ops,
.probe = bcm63xx_clk_probe,
.priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
};