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>
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,
+};