This allows controlling MISC IDDQ register on BCM6328 SoCs.
Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com --- drivers/power/domain/Kconfig | 7 +++ drivers/power/domain/Makefile | 1 + drivers/power/domain/bcm6328-power-domain.c | 83 +++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+) create mode 100644 drivers/power/domain/bcm6328-power-domain.c
diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig index 132e332..7cfa761 100644 --- a/drivers/power/domain/Kconfig +++ b/drivers/power/domain/Kconfig @@ -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 diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile index 2c3d926..c7d7644 100644 --- a/drivers/power/domain/Makefile +++ b/drivers/power/domain/Makefile @@ -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 diff --git a/drivers/power/domain/bcm6328-power-domain.c b/drivers/power/domain/bcm6328-power-domain.c new file mode 100644 index 0000000..15638bf --- /dev/null +++ b/drivers/power/domain/bcm6328-power-domain.c @@ -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, +};