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dm: power: domain: add BCM6328 power domain driver

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This allows controlling MISC IDDQ register on BCM6328 SoCs.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
This commit is contained in:
Álvaro Fernández Rojas 2017-05-07 20:28:36 +02:00 committed by Daniel Schwierzeck
parent 6327aa4783
commit 7810fb9547
3 changed files with 91 additions and 0 deletions
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7
drivers/power/domain/Kconfig
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@ -9,6 +9,13 @@ config POWER_DOMAIN
domains). This may be used to save power. This API provides the
means to control such power management hardware.
config BCM6328_POWER_DOMAIN
bool "Enable the BCM6328 power domain driver"
depends on POWER_DOMAIN && ARCH_BMIPS
help
Enable support for manipulating BCM6345 power domains via MMIO
mapped registers.
config SANDBOX_POWER_DOMAIN
bool "Enable the sandbox power domain test driver"
depends on POWER_DOMAIN && SANDBOX

1
drivers/power/domain/Makefile
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@ -3,6 +3,7 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_POWER_DOMAIN) += power-domain-uclass.o
obj-$(CONFIG_BCM6328_POWER_DOMAIN) += bcm6328-power-domain.o
obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain.o
obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain-test.o
obj-$(CONFIG_TEGRA186_POWER_DOMAIN) += tegra186-power-domain.o

83
drivers/power/domain/bcm6328-power-domain.c Normal file
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@ -0,0 +1,83 @@
/*
* 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,
};