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authorÁlvaro Fernández Rojas <noltari@gmail.com>2017-05-07 20:28:36 +0200
committerDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2017-05-10 16:16:09 +0200
commit7810fb9547a2101a9570ec359db480be2f2939b5 (patch)
tree97efdb2bf8b91c93ba3c309e31c1a69e24862570 /drivers/power/domain
parent6327aa478332ed1970a0dbe33333f2ee7394ac06 (diff)
downloadu-boot-7810fb9547a2101a9570ec359db480be2f2939b5.tar.gz
dm: power: domain: add BCM6328 power domain driver
This allows controlling MISC IDDQ register on BCM6328 SoCs. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'drivers/power/domain')
-rw-r--r--drivers/power/domain/Kconfig7
-rw-r--r--drivers/power/domain/Makefile1
-rw-r--r--drivers/power/domain/bcm6328-power-domain.c83
3 files changed, 91 insertions, 0 deletions
diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig
index 132e33250e..7cfa761498 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 2c3d92638f..c7d7644402 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 0000000000..15638bf3ba
--- /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,
+};