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/*
* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <power-domain-uclass.h>
#include <asm/io.h>
#define MAX_DOMAINS 32
struct bcm6328_power_domain {
void __iomem *regs;
};
static int bcm6328_power_domain_request(struct power_domain *power_domain)
{
if (power_domain->id >= MAX_DOMAINS)
return -EINVAL;
return 0;
}
static int bcm6328_power_domain_free(struct power_domain *power_domain)
{
return 0;
}
static int bcm6328_power_domain_on(struct power_domain *power_domain)
{
struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
clrbits_be32(priv->regs, BIT(power_domain->id));
return 0;
}
static int bcm6328_power_domain_off(struct power_domain *power_domain)
{
struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
setbits_be32(priv->regs, BIT(power_domain->id));
return 0;
}
static int bcm6328_power_domain_probe(struct udevice *dev)
{
struct bcm6328_power_domain *priv = dev_get_priv(dev);
fdt_addr_t addr;
fdt_size_t size;
addr = dev_get_addr_size_index(dev, 0, &size);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
priv->regs = ioremap(addr, size);
return 0;
}
static const struct udevice_id bcm6328_power_domain_ids[] = {
{ .compatible = "brcm,bcm6328-power-domain" },
{ /* sentinel */ }
};
struct power_domain_ops bcm6328_power_domain_ops = {
.free = bcm6328_power_domain_free,
.off = bcm6328_power_domain_off,
.on = bcm6328_power_domain_on,
.request = bcm6328_power_domain_request,
};
U_BOOT_DRIVER(bcm6328_power_domain) = {
.name = "bcm6328_power_domain",
.id = UCLASS_POWER_DOMAIN,
.of_match = bcm6328_power_domain_ids,
.ops = &bcm6328_power_domain_ops,
.priv_auto_alloc_size = sizeof(struct bcm6328_power_domain),
.probe = bcm6328_power_domain_probe,
};
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